JPH1095652A - Grout composition - Google Patents
Grout compositionInfo
- Publication number
- JPH1095652A JPH1095652A JP26503996A JP26503996A JPH1095652A JP H1095652 A JPH1095652 A JP H1095652A JP 26503996 A JP26503996 A JP 26503996A JP 26503996 A JP26503996 A JP 26503996A JP H1095652 A JPH1095652 A JP H1095652A
- Authority
- JP
- Japan
- Prior art keywords
- weight
- parts
- water
- cement
- grout
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00482—Coating or impregnation materials
- C04B2111/00525—Coating or impregnation materials for metallic surfaces
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/10—Mortars, concrete or artificial stone characterised by specific physical values for the viscosity
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
(57)【要約】
【課題】 鋼板との付着強度が大きく、首都高速道路公
団の「無収縮モルタルに必要な品質とその確認試験方法
（案）」に示されている品質および施工性を満足する鋼
板巻き立て工法に適したグラウト組成物の提供。
【解決手段】 セメント１００重量部、細骨材８０〜１
５０重量部、膨張材３〜１５重量部、減水剤０．３〜
２．０重量部、発泡剤０．００１〜０．０２重量部、高
分子エマルジョン１０〜４０重量部および水溶性セルロ
ース系ポリマー０．００１〜０．０２重量部からなり、
水溶性セルロース系ポリマーは、２０℃における２重量
％水溶液の塑性粘度が１２０００〜１８０００ｍＰａ・
ｓのものとする。[57] [Abstract] [Problem] High adhesion strength to steel sheet and satisfies the quality and workability specified in "Quality required for non-shrink mortar and its test method for verification (draft)" of Metropolitan Expressway Public Corporation. Of grout compositions suitable for the steel sheet winding method. SOLUTION: 100 parts by weight of cement, fine aggregate 80-1
50 parts by weight, expander 3 to 15 parts by weight, water reducing agent 0.3 to
2.0 parts by weight, a foaming agent 0.001 to 0.02 parts by weight, a polymer emulsion 10 to 40 parts by weight and a water-soluble cellulosic polymer 0.001 to 0.02 parts by weight,
The water-soluble cellulosic polymer has a plastic viscosity of a 2% by weight aqueous solution at 20 ° C. of 12000 to 18000 mPa · s.
s.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、土木・建築業界に
おいて使用されるグラウト組成物であって、特に鋼板巻
き立て工法に適したグラウト組成物に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grout composition used in the civil engineering and construction industries, and particularly to a grout composition suitable for a steel sheet winding method.
【０００２】[0002]
【従来の技術】ＲＣ橋脚等を補強するために、鋼板巻き
立て工法による橋脚補強工事が行われている。この鋼板
巻き立て工法は、円柱状の橋脚に鋼板を巻き立て、橋脚
と鋼板との空隙に無収縮グラウトやエポキシ樹脂等を注
入する工法である。2. Description of the Related Art In order to reinforce RC piers and the like, pier reinforcement work is carried out by a steel plate winding method. This steel plate winding method is a method in which a steel plate is wound around a cylindrical pier and non-shrinkable grout or epoxy resin is injected into a gap between the pier and the steel plate.
【０００３】鋼板巻き立て工法におけるグラウトとし
て、グラウトと鋼板との付着強度が１５ｋｇｆ／ｃｍ2
以上であって、橋脚の補強効果の高いグラウトが望まれ
てきている。As the grout in the steel sheet winding method, the adhesive strength between the grout and the steel sheet is 15 kgf / cm 2.
As described above, a grout having a high pier reinforcing effect has been desired.
【０００４】このような鋼板との付着強度を高めたグラ
ウトとして、セメント、細骨材、膨張材、減水剤、発泡
剤および高分子エマルジョンからなるグラウトが知られ
ている。A grout comprising cement, fine aggregate, an expanding material, a water reducing agent, a foaming agent, and a polymer emulsion is known as a grout having an increased adhesion strength to a steel sheet.
【０００５】[0005]
【発明が解決しようとする課題】一方、鋼板巻き立て工
法においてグラウトを橋脚と鋼板との空隙に注入する場
合、該グラウトは首都高速道路公団の「無収縮モルタル
に必要な品質とその確認試験方法（案）」に示されてい
る品質（Ｊ14ロート流下時間、ブリージング率、膨張収
縮率、凝結時間、圧縮強度）および施工性（ブリージン
グ率、高さ別圧縮強度最大差、高さ別単位容積重量最大
差、小間隙充填性）も満足する必要がある。On the other hand, when grout is injected into the gap between the bridge pier and the steel plate in the steel plate winding method, the grout is produced by the Metropolitan Expressway Public Corporation, "Quality required for non-shrink mortar and its confirmation test method. quality shown in (draft) "(J 14 funnel flow time, bleeding index, expansion and shrinkage rate, setting time, compressive strength) and workability (breathing rate, height by compressive strength maximum difference, height by unit volume Weight difference, small gap filling property) must also be satisfied.
【０００６】しかしながら、従来の鋼板との付着強度を
高めたセメント、細骨材、膨張材、減水剤、発泡剤およ
び高分子エマルジョンからなるグラウトを鋼板巻き立て
工法に適用した場合、Ｊ14ロート流下時間を規定値（８
±２秒）に調整すると、施工時において該グラウト中で
気泡の浮き上がりが生じるため、橋脚上部のグラウトの
圧縮強度が極端に低下するとともに、施工性、特に高さ
別圧縮強度最大差と高さ別単位容積重量最大差を満足す
るものは得られなかった。However, cement having enhanced adhesion strength between the conventional steel, fine aggregate, expanded material, water reducing agent, the case of applying the grout consisting of blowing agent and polymer emulsion on the steel sheet winding stand method, J 14 Funnel Flow Set the time to the specified value (8
When adjusted to (± 2 seconds), bubbles rise in the grout at the time of construction, so that the compressive strength of the grout at the top of the pier decreases extremely and the workability, especially the maximum difference in compressive strength by height and height Those satisfying the maximum difference in separate unit weight were not obtained.
【０００７】[0007]
【課題を解決するための手段】そこで、本発明者らは、
鋼板と１５ｋｇｆ／ｃｍ2以上の付着強度を有し、か
つ、「無収縮モルタルに必要な品質とその確認試験方法
（案）」に示されている品質および施工性を満足し、鋼
板巻き立て工法に適用できるグラウト組成物を得るべく
鋭意研究した結果、特定の粘度を有する水溶性セルロー
ス系ポリマーを添加すること、グラウト組成物の配合を
特定することによって所望のグラウト組成物が得られる
との知見を得、本発明に到達した。Means for Solving the Problems Accordingly, the present inventors have:
It has a bond strength of 15 kgf / cm 2 or more with steel sheet, and satisfies the quality and workability shown in “Quality necessary for non-shrink mortar and its confirmation test method (draft)”. As a result of diligent research to obtain a grout composition applicable to, it was found that a desired grout composition can be obtained by adding a water-soluble cellulose-based polymer having a specific viscosity and specifying the composition of the grout composition. And reached the present invention.
【０００８】即ち、本発明は、セメント、細骨材、膨張
材、減水剤、発泡剤および高分子エマルジョンからなる
グラウト組成物において、これらの配合割合が、セメン
ト１００重量部、細骨材８０〜１５０重量部、膨張材３
〜１５重量部、減水剤０．３〜２．０重量部、発泡剤
０．００１〜０．０２重量部および高分子エマルジョン
１０〜４０重量部であり、これらに２０℃における２重
量％水溶液の塑性粘度が１２０００〜１８０００ｍＰａ
・ｓの水溶性セルロース系ポリマー０．００１〜０．０
２重量部を添加したものであることを特徴とするグラウ
ト組成物である。That is, the present invention relates to a grout composition comprising a cement, a fine aggregate, an expanding material, a water reducing agent, a foaming agent and a polymer emulsion, wherein the mixing ratio thereof is 100 parts by weight of the cement, 80 to the fine aggregate, 150 parts by weight, expanding material 3
To 15 parts by weight, a water reducing agent 0.3 to 2.0 parts by weight, a foaming agent 0.001 to 0.02 parts by weight, and a polymer emulsion 10 to 40 parts by weight. Plastic viscosity is 12000-18000mPa
・ S water-soluble cellulosic polymer 0.001 to 0.0
A grout composition to which 2 parts by weight are added.
【０００９】[0009]
【発明の実施の形態】以下、本発明を詳細に説明する。
なお、本発明において、グラウトと鋼板との付着強度と
は、７×７×２ｃｍ程度の板状のモルタルに４×４×１
ｃｍの型枠（塩ビ製）を取り付け、これにグラウトを充
填した後、７×７×０．３ｃｍの鋼板を載せ、さらに該
鋼板の上に１ｋｇの重りを載せた状態で２０℃で７日間
養生後、鋼板に治具を取り付け、垂直に引っ張ることに
より測定された値である。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.
In the present invention, the adhesive strength between the grout and the steel sheet is 4 × 4 × 1 in a plate-like mortar of about 7 × 7 × 2 cm.
cm mold (made of polyvinyl chloride), grout is filled into the mold, a steel plate of 7 × 7 × 0.3 cm is placed, and a 1 kg weight is placed on the steel plate at 20 ° C. for 7 days. After curing, this is a value measured by attaching a jig to a steel plate and pulling vertically.
【００１０】本発明において、水溶性セルロース系ポリ
マーは、２０℃における２重量％水溶液の塑性粘度が１
２０００〜１８０００ｍＰａ・ｓのものである。２０℃
における２重量％水溶液の塑性粘度が１２０００ｍＰａ
・ｓ未満の水溶性セルロース系ポリマーでは、気泡の浮
き上がりを防ぐことができず、橋脚上部のグラウトの圧
縮強度が極端に低下する。また、高さ別圧縮強度最大差
や高さ別単位容積重量最大差の規定値を満足することは
困難である。２０℃における２重量％水溶液の塑性粘度
が１８０００ｍＰａ・ｓを越える水溶性セルロース系ポ
リマーでは、Ｊ14ロート流下時間を８±２秒に調整しよ
うとすると水量が大きくなるため、気泡の浮き上がりが
生じ橋脚上部のグラウトの圧縮強度が極端に低下する。
また、高さ別圧縮強度最大差や高さ別単位容積重量最大
差の規定値を満足することは困難である。In the present invention, the water-soluble cellulosic polymer has a plastic viscosity of 2% by weight aqueous solution at 20 ° C. of 1%.
2000 to 18000 mPa · s. 20 ° C
Plastic viscosity of 2% by weight aqueous solution at 12000 mPa
With a water-soluble cellulosic polymer of less than s, it is impossible to prevent air bubbles from rising, and the compressive strength of the grout on the pier upper part is extremely reduced. In addition, it is difficult to satisfy the specified values of the maximum difference in compressive strength by height and the maximum difference in unit volume weight by height. In the case of a water-soluble cellulosic polymer in which the 2% by weight aqueous solution at 20 ° C. has a plastic viscosity of more than 18000 mPa · s, if the flow rate of the J 14 funnel is adjusted to 8 ± 2 seconds, the amount of water becomes large, so that bubbles rise and the piers rise. The compressive strength of the upper grout is extremely reduced.
In addition, it is difficult to satisfy the specified values of the maximum difference in compressive strength by height and the maximum difference in unit volume weight by height.
【００１１】本発明における高分子エマルジョンは固形
分が３０〜４５％のもので、ポリアクリル酸エマルジョ
ン、ポリアクリル酸メチルエマルジョン、ポリアクリル
酸エチルエマルジョン、ポリメタクリル酸エマルジョン
等のアクリル系エマルジョンや、ＳＢＲ系エマルジョ
ン、ＥＶＡ系エマルジョン等が挙げられる。The polymer emulsion according to the present invention has a solid content of 30 to 45%, and is an acrylic emulsion such as polyacrylic acid emulsion, polymethyl methacrylate emulsion, polyethyl acrylate emulsion, polymethacrylic acid emulsion, or SBR. Emulsion, EVA emulsion and the like.
【００１２】本発明におけるセメントとしては、普通ポ
ルトランドセメント、早強ポルトランドセメント、中庸
熱ポルトランドセメント等のポルトランドセメントと、
高炉セメント、シリカセメント、フライアッシュセメン
トが挙げられる。As the cement in the present invention, Portland cement such as ordinary Portland cement, early-strength Portland cement, moderate heat Portland cement and the like,
Blast furnace cement, silica cement, and fly ash cement are exemplified.
【００１３】本発明における細骨材は、特にその材質は
限定されないが、その最大粒径は１．５ｍｍ以下、平均
粒径が０．４〜０．６ｍｍのものが好ましい。The fine aggregate in the present invention is not particularly limited in its material, but preferably has a maximum particle size of 1.5 mm or less and an average particle size of 0.4 to 0.6 mm.
【００１４】本発明における膨張材としては、カルシウ
ムサルホアルミネート系、生石灰系、石膏系、生石灰−
石膏系等の膨張材が挙げられる。As the expanding material in the present invention, calcium sulfoaluminate-based, quicklime-based, gypsum-based, quicklime-
An expanding material such as a gypsum-based material may be used.
【００１５】本発明における減水剤としては、メラミン
系、ナフタレンスルホン酸系、ポリカルボン酸系等の減
水剤が挙げられる。Examples of the water reducing agent in the present invention include melamine-based, naphthalene sulfonic acid-based, polycarboxylic acid-based water reducing agents, and the like.
【００１６】本発明における発泡剤としては、アルミニ
ウム粉、鉄粉等の金属粉が挙げられる。これらの金属粉
は、最大粒径が１ｍｍ以下、平均粒径が０．２〜０．３
５ｍｍのものが好ましい。Examples of the foaming agent in the present invention include metal powders such as aluminum powder and iron powder. These metal powders have a maximum particle size of 1 mm or less and an average particle size of 0.2 to 0.3.
5 mm is preferred.
【００１７】本発明において、セメント、細骨材、膨張
材、減水剤、発泡剤、水溶性セルロース系ポリマーおよ
び高分子エマルジョンの配合割合は、セメント１００重
量部、細骨材８０〜１５０重量部、膨張材３〜１５重量
部、減水剤０．３〜２．０重量部、発泡剤０．００１〜
０．０２重量部、水溶性セルロース系ポリマー０．００
１〜０．０２重量部および高分子エマルジョン１０〜４
０重量部である。セメント１００重量部に対して、細骨
材が８０重量部未満では、「無収縮モルタルに必要な品
質とその確認試験方法（案）」に示されている膨張収縮
率の規定値を満足するのが困難である。また、鋼板との
付着強度が１５ｋｇｆ／ｃｍ2未満になる。細骨材が１
５０重量部を越えると、材料分離が生じやすくなるた
め、気泡の浮き上がりが生じ橋脚上部のグラウトの圧縮
強度が極端に低下する。また、高さ別圧縮強度最大差や
高さ別単位容積重量最大差の規定値を満足することが困
難である。セメント１００重量部に対して、膨張材が３
重量部未満では、膨張収縮率の規定値を満足するのが困
難である。また、鋼板との付着強度が１５ｋｇｆ／ｃｍ
2未満になる。膨張材が１５重量部を越えると、膨張量
が過大となり硬化後のグラウトに亀裂が生じて圧縮強度
の規定値を満足することが困難である。セメント１００
重量部に対して、減水剤が０．３重量部未満では、Ｊ14
ロート流下時間を８±２秒に調整しようとすると水量が
大きくなるため、気泡の浮き上がりが生じ橋脚上部のグ
ラウトの圧縮強度が極端に低下する。また、高さ別圧縮
強度最大差や高さ別単位容積重量最大差の規定値を満足
することは困難である。減水剤が２．０重量部を越える
と、凝結時間の規定値を満足することは困難である。セ
メント１００重量部に対して、発泡剤が０．００１重量
部未満では、膨張収縮率の規定値を満足するのが困難で
ある。また、鋼板との付着強度が１５ｋｇｆ／ｃｍ2未
満になる。発泡剤が０．０２重量部を越えると、膨張量
が過大となり圧縮強度の規定値を満足することが困難で
ある。セメント１００重量部に対して、水溶性セルロー
ス系ポリマーが０．００１重量部未満では、気泡の浮き
上がりを防ぐことができず、橋脚上部のグラウトの圧縮
強度が極端に低下する。また、高さ別圧縮強度最大差や
高さ別単位容積重量最大差の規定値を満足することは困
難である。水溶性セルロース系ポリマーが０．０２重量
部を越えると、Ｊ14ロート流下時間を８±２秒に調整し
ようとすると水量が大きくなるため、気泡の浮き上がり
が生じ橋脚上部のグラウトの圧縮強度が極端に低下す
る。また、高さ別圧縮強度最大差や高さ別単位容積重量
最大差の規定値を満足することは困難である。セメント
１００重量部に対して、高分子エマルジョンが１０重量
部未満では、鋼板との付着強度が１５ｋｇｆ／ｃｍ2未
満となる。高分子エマルジョンが４０重量部を越える
と、圧縮強度の規定値を満足することが困難である。In the present invention, the mixing ratio of cement, fine aggregate, expander, water reducing agent, foaming agent, water-soluble cellulose polymer and polymer emulsion is 100 parts by weight of cement, 80 to 150 parts by weight of fine aggregate, 3 to 15 parts by weight of expanding material, 0.3 to 2.0 parts by weight of water reducing agent, 0.001 to foaming agent
0.02 parts by weight, water-soluble cellulosic polymer 0.00
1 to 0.02 parts by weight and polymer emulsion 10 to 4
0 parts by weight. When the amount of fine aggregate is less than 80 parts by weight with respect to 100 parts by weight of cement, the specified value of the expansion and shrinkage rate indicated in “Quality necessary for non-shrink mortar and test method for its confirmation (draft)” Is difficult. Further, the adhesion strength to the steel sheet is less than 15 kgf / cm 2 . 1 fine aggregate
If the amount exceeds 50 parts by weight, material separation is likely to occur, so that bubbles rise and the compressive strength of the grout at the upper part of the pier decreases extremely. Further, it is difficult to satisfy the prescribed values of the maximum difference in compressive strength by height and the maximum difference in unit volume weight by height. 3 parts of expanding material per 100 parts by weight of cement
If the amount is less than the weight part, it is difficult to satisfy the specified value of the expansion / contraction rate. Further, the bonding strength with the steel plate is 15 kgf / cm.
Less than 2 . When the amount of the expanding material exceeds 15 parts by weight, the amount of expansion is excessive and cracks occur in the cured grout, making it difficult to satisfy the specified value of compressive strength. Cement 100
If the water reducing agent is less than 0.3 parts by weight with respect to parts by weight, J 14
Attempting to adjust the funnel flow time to 8 ± 2 seconds increases the amount of water, causing air bubbles to rise and the compressive strength of the grout above the pier to drop extremely. In addition, it is difficult to satisfy the specified values of the maximum difference in compressive strength by height and the maximum difference in unit volume weight by height. When the amount of the water reducing agent exceeds 2.0 parts by weight, it is difficult to satisfy the specified value of the setting time. If the amount of the foaming agent is less than 0.001 part by weight based on 100 parts by weight of cement, it is difficult to satisfy the specified value of the expansion / shrinkage rate. Further, the adhesion strength to the steel sheet is less than 15 kgf / cm 2 . When the amount of the foaming agent exceeds 0.02 parts by weight, the amount of expansion is excessive, and it is difficult to satisfy the specified value of compressive strength. If the amount of the water-soluble cellulose-based polymer is less than 0.001 part by weight with respect to 100 parts by weight of the cement, floating of the air bubbles cannot be prevented, and the compressive strength of the grout on the pier upper part is extremely reduced. In addition, it is difficult to satisfy the specified values of the maximum difference in compressive strength by height and the maximum difference in unit volume weight by height. When water-soluble cellulosic polymer is more than 0.02 part by weight, J 14 because the funnel flow time tries to adjust to 8 ± 2 seconds water increases, the extreme compressive strength of the pier top of grout occurs floating of air bubbles To decline. In addition, it is difficult to satisfy the specified values of the maximum difference in compressive strength by height and the maximum difference in unit volume weight by height. If the amount of the polymer emulsion is less than 10 parts by weight with respect to 100 parts by weight of the cement, the adhesive strength to the steel sheet is less than 15 kgf / cm 2 . If the amount of the polymer emulsion exceeds 40 parts by weight, it is difficult to satisfy the specified value of the compressive strength.
【００１８】なお、本発明のグラウト組成物に従来から
添加されている可塑剤、繊維材料、混和剤（例えば、防
水材、安定剤等）、混和材（例えば、高炉スラグ、フラ
イアッシュ等）を本発明の目的に影響しない程度に添加
することは差し支えない。The plasticizer, fiber material, admixture (eg, waterproofing material, stabilizer, etc.) and admixture (eg, blast furnace slag, fly ash, etc.) conventionally added to the grout composition of the present invention are used. It may be added to such an extent that it does not affect the purpose of the present invention.
【００１９】本発明のグラウト組成物の使用に際して
は、イオン交換水、蒸留水、水道水等を添加してグラウ
トを調製する。水はセメント１００重量部に対して１５
〜３０重量部とするのが好ましい。In using the grout composition of the present invention, grout is prepared by adding ion-exchanged water, distilled water, tap water and the like. Water is 15 per 100 parts by weight of cement
Preferably, the amount is up to 30 parts by weight.
【００２０】上記グラウトの製造における各構成材料の
混練は、例えば、ハンドミキサ、グラウトミキサ等の従
来から使用されている混合装置を使用すればよい。この
場合、混合装置への各構成材料の添加順序および混合時
間等は特に限定されない。The kneading of each constituent material in the production of the grout may be performed by using a conventionally used mixing device such as a hand mixer or a grout mixer. In this case, the order of addition of each constituent material to the mixing device, the mixing time, and the like are not particularly limited.
【００２１】上記グラウトの施工は、ポンプ圧送等で行
えばよい。The grout may be applied by pumping or the like.
【００２２】[0022]
【実施例】以下、実施例により本発明を説明する。The present invention will be described below with reference to examples.
【００２３】使用材料 （１）水溶性セルロース １；メトローズｈｉ９０ＳＨ−１５０００（信越化学工
業製） ２重量％水溶液の２０℃における塑性粘度：１５０００
ｍＰａ・ｓ ２；メトローズｈｉ９０ＳＨ−４０００（信越化学工業
製） ２重量％水溶液の２０℃における塑性粘度：４０００ｍ
Ｐａ・ｓ ３；メトローズｈｉ９０ＳＨ−３００００（信越化学工
業製） ２重量％水溶液の２０℃における塑性粘度：３００００
ｍＰａ・ｓ （２）その他の材料 セメント ；早強ポルトランドセメント（日本セメント製） 細骨材 ；珪砂４号：珪砂５号（いずれも日本セメント製）＝１：１ （重量比）の混合品 減水剤 ；メルメントＦ１０Ｍ（ヘキスト合成製） 膨張材 ；アサノジプカル（日本セメント製） 発泡剤 ；アルミニウムパウダーＮＯ．４０（大和金属粉工業製） 高分子エマルシ゛ョン ；リポテックスＭ−３００（ライオン製） 水 ；水道水Materials used (1) Water-soluble cellulose 1: Metroose hi90SH-15000 (manufactured by Shin-Etsu Chemical Co., Ltd.) Plastic viscosity at 20 ° C. of 2% by weight aqueous solution: 15000
mPa · s 2; plastic viscosity at 20 ° C. of a 2% by weight aqueous solution of Metroose hi90SH-4000 (manufactured by Shin-Etsu Chemical Co., Ltd.): 4000 m
Pa · s 3; Metroose hi90SH-30000 (manufactured by Shin-Etsu Chemical Co., Ltd.) Plastic viscosity at 20 ° C. of 2% by weight aqueous solution: 30000
mPa · s (2) Other materials Cement; Early-strength Portland cement (made by Nippon Cement) Fine aggregate; Silica sand 4: Silica sand 5 (all made by Nippon Cement) = 1: 1 (weight ratio) Agent: Melment F10M (manufactured by Hoechst Synthetic) Expanding material: asanodipcal (manufactured by Nippon Cement) Foaming agent: aluminum powder NO. 40 (manufactured by Daiwa Metal Powder Co., Ltd.) Polymer emulsion; Lipotex M-300 (manufactured by Lion) Water; tap water
【００２４】[0024]
【表１】 [Table 1]
【００２５】１．グラウトの配合条件および混合 表１に示す配合で、セメント、細骨材、減水剤、膨張
材、発泡剤、水溶性セルロース、高分子エマルジョンお
よび水を日立工機社製ハンドミキサを用いて３分間混練
しグラウトを調製した。1. Grout mixing conditions and mixing Under the mixing shown in Table 1, cement, fine aggregate, water reducing agent, expanding agent, foaming agent, water-soluble cellulose, polymer emulsion and water were mixed for 3 minutes using a hand mixer manufactured by Hitachi Koki Co., Ltd. The mixture was kneaded to prepare grout.
【００２６】２．評価 （１）品質および施工性 首都高速道路公団の「無収縮モルタルに必要な品質とそ
の確認試験方法（案）」に示されている試験方法に準じ
て品質（Ｊ14ロート流下時間、ブリージング率、膨張収
縮率、凝結時間、圧縮強度）および施工性（ブリージン
グ率、高さ別圧縮強度最大差、高さ別単位容積重量最大
差、小間隙充填性）を測定した。 （２）気泡の浮き上がり 上記施工性の試験後、頂部の泡の状態を観察した。 （３）鋼板との付着強度 ７×７×２ｃｍのモルタルに４×４×１ｃｍの型枠（塩
ビ製）を取り付け、これにグラウトを充填した後、７×
７×０．３ｃｍの鋼板を載せ、さらに該鋼板の上に１ｋ
ｇの重りを載せた状態で２０℃で７日間養生した。養生
後、鋼板に治具を取り付け、垂直に引っ張ることにより
鋼板との付着強度を測定した。結果を表２に示す。な
お、表２に記載していない項目（品質のブリージング
率、施工性のブリージング率および小間隙充填性）は、
規定値を満足した。2. Evaluation (1) quality and workability according to the test method described in "Quality required non-shrink mortar and confirm test method (draft)" Quality (J 14 funnel flow time Metropolitan Expressway Public Corporation, breathing rate , Expansion / shrinkage rate, setting time, compression strength) and workability (breathing rate, maximum difference in compression strength by height, maximum difference in unit volume weight by height, small gap filling property) were measured. (2) Lifting of bubbles After the test of the workability, the state of the bubbles at the top was observed. (3) Adhesive strength to steel plate A 4 × 4 × 1 cm formwork (made of PVC) is attached to a 7 × 7 × 2 cm mortar, and after filling with grout, the
Place a 7 × 0.3cm steel plate and place 1k on the steel plate
Cured at 20 ° C. for 7 days with a g weight placed. After curing, a jig was attached to the steel plate and pulled vertically to measure the adhesion strength to the steel plate. Table 2 shows the results. Items not described in Table 2 (breathing rate of quality, breathing rate of workability and small gap filling property) are as follows.
The specified value was satisfied.
【００２７】[0027]
【表２】 [Table 2]
【００２８】実施例１は、本発明で規定する２重量％水
溶液の２０℃における塑性粘度が１５０００ｍＰａ・ｓ
である水溶性セルロース系ポリマーを用いて評価を行っ
たものであるが、「無収縮モルタルに必要な品質とその
確認試験方法（案）」に示されている品質および施工性
を満足し、気泡の浮き上がりも認められず、鋼板との付
着強度も大きかった。一方、比較例１に示すように、２
重量％水溶液の２０℃における塑性粘度が４０００ｍＰ
ａ・ｓと小さい水溶性セルロース系ポリマーでは、頂部
に泡が多数認められた。また、高さ別圧縮強度最大差や
高さ別単位容積重量最大差が規定値を越えた。比較例２
に示すように、２重量％水溶液の２０℃における塑性粘
度が３００００ｍＰａ・ｓと大きい水溶性セルロース系
ポリマーでも、頂部に泡が多数認められた。また、高さ
別圧縮強度最大差や高さ別単位容積重量最大差が規定値
を越えた。In Example 1, the plastic viscosity at 20 ° C. of a 2% by weight aqueous solution specified in the present invention was 15,000 mPa · s.
The evaluation was performed using a water-soluble cellulosic polymer, which is a water-soluble cellulosic polymer that satisfies the quality and workability indicated in “Quality necessary for non-shrink mortar and its confirmation test method (draft)”. No lifting was recognized, and the adhesion strength to the steel sheet was high. On the other hand, as shown in Comparative Example 1, 2
Plastic viscosity at 20 ° C of 4000 wt% aqueous solution
In the case of the water-soluble cellulosic polymer as small as as, many bubbles were recognized at the top. In addition, the maximum difference in compressive strength by height and the maximum difference in unit volume weight by height exceeded the specified values. Comparative Example 2
As shown in Table 2, even with a water-soluble cellulosic polymer having a large plastic viscosity of 30000 mPa · s at 20 ° C. of a 2% by weight aqueous solution, many bubbles were observed at the top. In addition, the maximum difference in compressive strength by height and the maximum difference in unit volume weight by height exceeded the specified values.
【００２９】実施例２〜３は、細骨材の配合割合を変え
て評価を行ったものであるが、本発明で規定するセメン
ト１００重量部に対して細骨材８０〜１５０重量部の範
囲では、「無収縮モルタルに必要な品質とその確認試験
方法（案）」に示されている品質および施工性を満足
し、気泡の浮き上がりも認められず、鋼板との付着強度
も大きかった。一方、比較例３に示すように、細骨材の
少ない６０重量部のものは、膨張収縮率が規定値より小
さく、鋼板との付着強度も小さかった。比較例４に示す
ように、細骨材の多い１７０重量部のものは、頂部に泡
が多数認められた。また、高さ別圧縮強度最大差および
高さ別単位容積重量最大差が規定値を越えた。Examples 2 and 3 were evaluated by changing the mixing ratio of the fine aggregate. The range of 80 to 150 parts by weight of the fine aggregate relative to 100 parts by weight of the cement specified in the present invention was used. The sample satisfies the quality and workability shown in "Quality Required for Non-Shrink Mortar and Confirmation Test Method (Draft)", no air bubbles were observed, and the adhesion strength to the steel sheet was large. On the other hand, as shown in Comparative Example 3, in the case of 60 parts by weight with a small amount of fine aggregate, the expansion and shrinkage ratio was smaller than the specified value, and the adhesion strength to the steel plate was also small. As shown in Comparative Example 4, in the case of 170 parts by weight with a large amount of fine aggregate, many bubbles were observed at the top. Further, the maximum difference in compressive strength by height and the maximum difference in unit volume weight by height exceeded the specified values.
【００３０】実施例４〜５は、膨張材の配合割合を変え
て評価を行ったものであるが、本発明で規定するセメン
ト１００重量部に対して膨張材が３〜１５重量部の範囲
では、「無収縮モルタルに必要な品質とその確認試験方
法（案）」に示されている品質および施工性を満足し、
気泡の浮き上がりも認められず、鋼板との付着強度も大
きかった。一方、比較例５に示すように、膨張材の少な
い２重量部のものは、膨張収縮率が規定値より小さく、
鋼板との付着強度も小さかった。また、比較例６に示す
ように、膨張材の多い１７重量部のものは、圧縮強度が
規定値より小さかった。Examples 4 and 5 were evaluated by changing the compounding ratio of the expanding material. When the expanding material was in the range of 3 to 15 parts by weight with respect to 100 parts by weight of cement specified in the present invention. , Satisfying the quality and workability shown in "Quality required for non-shrink mortar and its test method (draft)"
No lifting of air bubbles was observed, and the adhesion strength to the steel sheet was large. On the other hand, as shown in Comparative Example 5, in the case of 2 parts by weight of the expanding material, the expansion and contraction rate was smaller than the specified value,
The bonding strength with the steel sheet was also small. Further, as shown in Comparative Example 6, the compressive strength of 17 parts by weight with a large amount of expanding material was smaller than the specified value.
【００３１】実施例６〜７は、減水剤の配合割合を変え
て評価を行ったものであるが、本発明で規定するセメン
ト１００重量部に対して減水剤が０．３〜２．０重量部
の範囲では、「無収縮モルタルに必要な品質とその確認
試験方法（案）」に示されている品質および施工性を満
足し、気泡の浮き上がりも認められず、鋼板との付着強
度も大きかった。一方、比較例７に示すように、減水剤
の少ない０．２重量部のものは、頂部に泡が多数認めら
れた。また、高さ別圧縮強度最大差および高さ別単位容
積重量最大差が規定値を越えた。比較例８に示すよう
に、減水剤の多い２．３重量部のものは、終結時間が規
定値を越えた。Examples 6 and 7 were evaluated by changing the mixing ratio of the water reducing agent. The water reducing agent was used in an amount of 0.3 to 2.0 parts by weight based on 100 parts by weight of the cement specified in the present invention. In the area of the part, the quality and workability specified in “Quality required for non-shrink mortar and its confirmation test method (draft)” are satisfied, no air bubbles are observed, and the adhesion strength to steel sheet is large. Was. On the other hand, as shown in Comparative Example 7, in the case of 0.2 parts by weight with a small amount of the water reducing agent, many bubbles were observed at the top. Further, the maximum difference in compressive strength by height and the maximum difference in unit volume weight by height exceeded the specified values. As shown in Comparative Example 8, in the case of 2.3 parts by weight with a large amount of the water reducing agent, the termination time exceeded the specified value.
【００３２】実施例８〜９は、発泡剤の配合割合を変え
て評価を行ったものであるが、本発明で規定するセメン
ト１００重量部に対して発泡剤が０．００１〜０．０２
重量部の範囲では、「無収縮モルタルに必要な品質とそ
の確認試験方法（案）」に示されている品質および施工
性を満足し、気泡の浮き上がりも認められず、鋼板との
付着強度も大きかった。一方、比較例９に示すように、
発泡剤の少ない０．０００５重量部のものは、膨張収縮
率が規定値より小さく、鋼板との付着強度も小さかっ
た。また、比較例１０に示すように、発泡剤の多い０．
０２５重量部のものは、圧縮強度が規定値より小さかっ
た。Examples 8 and 9 were evaluated by changing the mixing ratio of the foaming agent. The amount of the foaming agent was 0.001 to 0.02 with respect to 100 parts by weight of the cement specified in the present invention.
In the range of parts by weight, it satisfies the quality and workability shown in “Quality required for non-shrink mortar and its confirmation test method (draft)”, no air bubbles are observed, and the adhesion strength with steel sheet is low. It was big. On the other hand, as shown in Comparative Example 9,
In the case of 0.0005 parts by weight with less foaming agent, the expansion / shrinkage ratio was smaller than the specified value, and the adhesion strength to the steel sheet was also small. In addition, as shown in Comparative Example 10, the amount of the foaming agent was 0.1%.
In the case of 025 parts by weight, the compressive strength was lower than the specified value.
【００３３】実施例１０〜１１は、水溶性セルロース系
ポリマーの配合割合を変えて評価を行ったものである
が、本発明で規定するセメント１００重量部に対して水
溶性セルロース系ポリマーが０．００１〜０．０２重量
部の範囲では、「無収縮モルタルに必要な品質とその確
認試験方法（案）」に示されている品質および施工性を
満足し、気泡の浮き上がりも認められず、鋼板との付着
強度も大きかった。一方、比較例１１に示すように、水
溶性セルロース系ポリマーの少ない０．０００５重量部
のものは、頂部に泡が多数認められた。また、高さ別圧
縮強度最大差や高さ別単位容積重量最大差が規定値を越
えた。比較例１２に示すように、水溶性セルロース系ポ
リマーの多い０．０２５重量部のものは、頂部に泡が多
数認められた。また、高さ別圧縮強度最大差や高さ別単
位容積重量最大差が規定値を越えた。Examples 10 to 11 were evaluated by changing the mixing ratio of the water-soluble cellulosic polymer. The water-soluble cellulosic polymer was added in an amount of 0.1 to 100 parts by weight of the cement specified in the present invention. In the range of 001 to 0.02 parts by weight, the quality and workability shown in “Quality necessary for non-shrink mortar and its confirmation test method (draft)” are satisfied, no air bubbles are observed, And the adhesive strength was high. On the other hand, as shown in Comparative Example 11, in the case of 0.0005 parts by weight with a small amount of the water-soluble cellulosic polymer, many bubbles were recognized at the top. In addition, the maximum difference in compressive strength by height and the maximum difference in unit volume weight by height exceeded the specified values. As shown in Comparative Example 12, in the case of 0.025 parts by weight containing a large amount of the water-soluble cellulose-based polymer, a large number of bubbles were observed at the top. In addition, the maximum difference in compressive strength by height and the maximum difference in unit volume weight by height exceeded the specified values.
【００３４】実施例１２〜１３は、高分子エマルジョン
の配合割合を変えて評価を行ったものであるが、本発明
で規定するセメント１００重量部に対して高分子エマル
ジョンが１０〜４０重量部の範囲では、「無収縮モルタ
ルに必要な品質とその確認試験方法（案）」に示されて
いる品質および施工性を満足し、気泡の浮き上がりも認
められず、鋼板との付着強度も大きかった。一方、比較
例１３に示すように、高分子エマルジョンの少ない７重
量部のものは、鋼板との付着強度が小さかった。比較例
１４に示すように、高分子エマルジョンの多い４３重量
部のものは、圧縮強度が小さかった。Examples 12 and 13 were evaluated by changing the blending ratio of the polymer emulsion. The polymer emulsion was used in an amount of 10 to 40 parts by weight based on 100 parts by weight of the cement specified in the present invention. In the range, the quality and workability indicated in “Quality necessary for non-shrink mortar and test method for its confirmation (draft)” were satisfied, no air bubbles were observed, and the adhesion strength to the steel sheet was large. On the other hand, as shown in Comparative Example 13, 7 parts by weight of the polymer emulsion having a small amount had a low adhesion strength to the steel sheet. As shown in Comparative Example 14, one having 43 parts by weight of a large amount of the polymer emulsion had a low compressive strength.
【００３５】[0035]
【発明の効果】本発明により、鋼板との付着強度が１５
ｋｇｆ／ｃｍ2以上と大きく、首都高速道路公団の「無
収縮モルタルに必要な品質とその確認試験方法（案）」
に示されている品質（Ｊ14ロート流下時間、ブリージン
グ率、膨張収縮率、凝結時間、圧縮強度）および施工性
（ブリージング率、高さ別圧縮強度最大差、高さ別単位
容積重量最大差、小間隙充填性）を満足する鋼板巻き立
て工法に適したグラウト組成物を提供できる。According to the present invention, the bonding strength to a steel sheet is 15
kgf / cm 2 or more, Tokyo Metropolitan Expressway Public Corporation's “Quality required for non-shrink mortar and its confirmation test method (draft)”
The indicated quality (J 14 funnel flow time, bleeding index, expansion and shrinkage rate, setting time, compressive strength) to and workability (breathing rate, height by compressive strength maximum difference, height by unit volume weight maximum difference, It is possible to provide a grout composition suitable for a steel sheet winding method that satisfies (small gap filling property).
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｃ０４Ｂ 22:04 24:38） 111:70 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 6 Identification code FI C04B 22:04 24:38) 111: 70
Claims (1)
泡剤および高分子エマルジョンからなるグラウト組成物
において、これらの配合割合が、 セメント１００重量部、細骨材８０〜１５０重量部、膨
張材３〜１５重量部、減水剤０．３〜２．０重量部、発
泡剤０．００１〜０．０２重量部および高分子エマルジ
ョン１０〜４０重量部であり、これらに２０℃における
２重量％水溶液の塑性粘度が１２０００〜１８０００ｍ
Ｐａ・ｓの水溶性セルロース系ポリマー０．００１〜
０．０２重量部を添加したものであることを特徴とする
グラウト組成物。1. A grout composition comprising a cement, a fine aggregate, an expanding material, a water reducing agent, a foaming agent and a polymer emulsion, the mixing ratio of which is 100 parts by weight of cement, 80 to 150 parts by weight of fine aggregate, 3 to 15 parts by weight of an expansive material, 0.3 to 2.0 parts by weight of a water reducing agent, 0.001 to 0.02 parts by weight of a foaming agent and 10 to 40 parts by weight of a polymer emulsion. % Aqueous solution has a plastic viscosity of 12000-18000m
Pa · s water-soluble cellulosic polymer 0.001
A grout composition characterized by adding 0.02 parts by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26503996A JP3641326B2 (en) | 1996-09-17 | 1996-09-17 | Grout composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26503996A JP3641326B2 (en) | 1996-09-17 | 1996-09-17 | Grout composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1095652A true JPH1095652A (en) | 1998-04-14 |
| JP3641326B2 JP3641326B2 (en) | 2005-04-20 |
Family
ID=17411740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26503996A Expired - Fee Related JP3641326B2 (en) | 1996-09-17 | 1996-09-17 | Grout composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3641326B2 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001329263A (en) * | 2000-05-19 | 2001-11-27 | Denki Kagaku Kogyo Kk | Cement admixture for grout and cement composition |
| JP2002167253A (en) * | 2000-11-30 | 2002-06-11 | Denki Kagaku Kogyo Kk | Cement admixture and cement composition |
| KR20050032359A (en) * | 2003-10-01 | 2005-04-07 | (주)태광씨엔피 | Low contraction grout mortar compound to pour into surface |
| JP2006016219A (en) * | 2004-06-30 | 2006-01-19 | Taiheiyo Material Kk | Cement-based grout composition |
| JP2007119316A (en) * | 2005-10-31 | 2007-05-17 | Denki Kagaku Kogyo Kk | Foaming agent, non-shrink grout composition, and non-shrink grout material using the same |
| JP2010173934A (en) * | 2010-04-08 | 2010-08-12 | Taiheiyo Materials Corp | Cement-based grout composition |
| KR101008569B1 (en) | 2010-07-30 | 2011-01-19 | 유한회사 삼흥산업 | Manufacturing method of cement mortar for connecting water pipe |
| JP2015124138A (en) * | 2013-12-27 | 2015-07-06 | 太平洋マテリアル株式会社 | Polymer cement grout material for repairing undersea tunnel, and repair method of undersea tunnel |
| JP2015127285A (en) * | 2013-12-28 | 2015-07-09 | 太平洋マテリアル株式会社 | Premix grout composition |
-
1996
- 1996-09-17 JP JP26503996A patent/JP3641326B2/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001329263A (en) * | 2000-05-19 | 2001-11-27 | Denki Kagaku Kogyo Kk | Cement admixture for grout and cement composition |
| JP2002167253A (en) * | 2000-11-30 | 2002-06-11 | Denki Kagaku Kogyo Kk | Cement admixture and cement composition |
| KR20050032359A (en) * | 2003-10-01 | 2005-04-07 | (주)태광씨엔피 | Low contraction grout mortar compound to pour into surface |
| JP2006016219A (en) * | 2004-06-30 | 2006-01-19 | Taiheiyo Material Kk | Cement-based grout composition |
| JP2007119316A (en) * | 2005-10-31 | 2007-05-17 | Denki Kagaku Kogyo Kk | Foaming agent, non-shrink grout composition, and non-shrink grout material using the same |
| JP2010173934A (en) * | 2010-04-08 | 2010-08-12 | Taiheiyo Materials Corp | Cement-based grout composition |
| KR101008569B1 (en) | 2010-07-30 | 2011-01-19 | 유한회사 삼흥산업 | Manufacturing method of cement mortar for connecting water pipe |
| JP2015124138A (en) * | 2013-12-27 | 2015-07-06 | 太平洋マテリアル株式会社 | Polymer cement grout material for repairing undersea tunnel, and repair method of undersea tunnel |
| JP2015127285A (en) * | 2013-12-28 | 2015-07-09 | 太平洋マテリアル株式会社 | Premix grout composition |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3641326B2 (en) | 2005-04-20 |
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