JPS634122A - Water-proof construction for light-weight gas concrete - Google Patents
Water-proof construction for light-weight gas concreteInfo
- Publication number
- JPS634122A JPS634122A JP61147096A JP14709686A JPS634122A JP S634122 A JPS634122 A JP S634122A JP 61147096 A JP61147096 A JP 61147096A JP 14709686 A JP14709686 A JP 14709686A JP S634122 A JPS634122 A JP S634122A
- Authority
- JP
- Japan
- Prior art keywords
- light
- gas concrete
- water
- concrete
- weight gas
- 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.)
- Pending
Links
- 239000004567 concrete Substances 0.000 title claims abstract description 19
- 238000010276 construction Methods 0.000 title description 4
- 239000002689 soil Substances 0.000 claims abstract description 6
- 230000035699 permeability Effects 0.000 claims abstract description 5
- 238000005266 casting Methods 0.000 claims abstract description 3
- 239000011381 foam concrete Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 6
- 239000003673 groundwater Substances 0.000 claims description 5
- 238000004078 waterproofing Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 11
- 239000004568 cement Substances 0.000 abstract description 10
- 238000005187 foaming Methods 0.000 abstract description 6
- 239000004088 foaming agent Substances 0.000 abstract description 6
- 235000013336 milk Nutrition 0.000 abstract description 4
- 239000008267 milk Substances 0.000 abstract description 4
- 210000004080 milk Anatomy 0.000 abstract description 4
- 238000009413 insulation Methods 0.000 abstract description 3
- 230000002797 proteolythic effect Effects 0.000 abstract description 3
- 239000011521 glass Substances 0.000 abstract description 2
- 239000011324 bead Substances 0.000 abstract 1
- 238000004065 wastewater treatment Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000004094 surface-active agent Substances 0.000 description 3
- 239000003562 lightweight material Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 235000018102 proteins Nutrition 0.000 description 2
- 108090000623 proteins and genes Proteins 0.000 description 2
- 102000004169 proteins and genes Human genes 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 108010010803 Gelatin Proteins 0.000 description 1
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 235000010582 Pisum sativum Nutrition 0.000 description 1
- 240000004713 Pisum sativum Species 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000005018 casein Substances 0.000 description 1
- BECPQYXYKAMYBN-UHFFFAOYSA-N casein, tech. Chemical compound NCCCCC(C(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(CC(C)C)N=C(O)C(CCC(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(C(C)O)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(COP(O)(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(N)CC1=CC=CC=C1 BECPQYXYKAMYBN-UHFFFAOYSA-N 0.000 description 1
- 235000021240 caseins Nutrition 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000012733 comparative method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004794 expanded polystyrene Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
Landscapes
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
- Retaining Walls (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
- Building Environments (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野〕
本発明は軽重気泡コンクリートに地下水等が浸透するこ
とを防止する工法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a construction method for preventing underground water etc. from penetrating into light and heavy cellular concrete.
［従来の技術］
軽量コンクリートの防水性を高めるためには、製品の場
合には、通常防水膜の塗布等が行なわれるが、現場打の
場合には、水／セメント比を下げて密実なコンクリート
とする方法、骨材に吸水率の小さい軽量材例えば発泡ス
チロール粒等を用いる方法、または接水剤、防水剤をセ
メント混和剤として用いる方法等がある。[Conventional technology] In order to improve the waterproofness of lightweight concrete, in the case of finished products, a waterproof membrane is usually applied, but in the case of on-site casting, a dense coating is applied by lowering the water/cement ratio. There are methods such as using concrete, using lightweight materials with low water absorption such as expanded polystyrene particles as aggregate, and using water-wetting agents and waterproofing agents as cement admixtures.
しかし、軽量材を用いる場合には、材料の分離が起こり
易く、製品の欠陥となり、防水性も失われる。However, when lightweight materials are used, separation of the materials is likely to occur, resulting in product defects and loss of waterproof properties.
また、ポリマーエマルジョン等の混和剤も粘性上昇等に
よる施工性紙下等で使い難い。Additionally, admixtures such as polymer emulsions are difficult to use under paper due to their increased viscosity.
軽量気泡コンクリートも製品として用いる場合には、そ
の防水処理が比穀的容易であるが、用途にはかなりの制
約を受ける。When lightweight aerated concrete is used as a product, it is relatively easy to waterproof it, but there are considerable restrictions on its use.
［発明が解決しようとする問題点］
−方、現場打軽量気泡コンクリートには上述のような防
水処理は困難で、地下水等が浸透すると、軽量性及び断
熱性が失われるため、従来は土木用としては裏込注入程
度に止どまっていた。[Problems to be solved by the invention] -On the other hand, it is difficult to perform waterproofing treatment on cast-in-place lightweight aerated concrete as mentioned above, and when groundwater etc. permeate, it loses its lightweight properties and heat insulation properties. However, it remained at the level of backfill injection.
本発明の目的は通常の軽量気泡コンクリートが宿命的に
保有する防水性の不足分解消することにある。The purpose of the present invention is to overcome the lack of waterproofness that ordinary lightweight cellular concrete inevitably has.
［問題点を解決するための手段］
従って、本発明は少なくとも軽量気泡コンクリートと高
い地下水位のもとにある土壌とが接する面に、排水パイ
プまたは排水マットを層状、溝状または筒状に設置し、
次に、導入気泡を独立且つ均一に分散した軽量気泡コン
クリートであって、透水係数ｋをＩ Ｘ １０−’Ｃｍ
／秒以下に抑えた軽量気泡コンクリートを打設すること
を特徴とする軽量気泡コンクリートの防水工法にある。[Means for Solving the Problems] Therefore, the present invention provides a method for installing drainage pipes or drainage mats in a layered, grooved or cylindrical shape at least on the surface where lightweight cellular concrete and soil under a high groundwater level come into contact. death,
Next, lightweight aerated concrete in which the introduced air bubbles are independently and uniformly dispersed, and the hydraulic conductivity k is I x 10-'Cm
The waterproofing method for lightweight aerated concrete is characterized by pouring the lightweight aerated concrete at a speed of less than 1/2 seconds.
［作 用］
軽量気泡コンクリートの透水性は空隙の大きさ及び空隙
の連続側に依存する。[Function] The water permeability of lightweight cellular concrete depends on the size of the voids and the continuity of the voids.
一方、軽量性を高めるためには空隙率を大きくする必要
がある。従って、本発明に使用する軽量気泡コンクリー
トでは気泡を独立気泡とし、更に、この独立気泡を均一
に分散させる。On the other hand, in order to increase the weight, it is necessary to increase the porosity. Therefore, in the lightweight cellular concrete used in the present invention, the cells are closed cells, and furthermore, the closed cells are uniformly dispersed.
これを行なうためには、高性能の起泡剤と発泡機の組み
合わせによって得られた＠細気泡ａをセメントミルクと
適正な比率で配合し、高性能のミキサーで均一混合を行
なうことが必要である。In order to do this, it is necessary to mix @fine foam a obtained by a combination of a high-performance foaming agent and a foaming machine with cement milk in an appropriate ratio, and to uniformly mix it with a high-performance mixer. be.
微細気泡群を調製する起泡剤にはゼラチンやカゼインの
ような蛋白質の誘導体く蛋白質分解系）、松脂のような
樹脂石鹸類、合成樹脂系の界面活性剤（界面活性剤系）
のものがあるが、本発明に使用する水硬性組成物には起
泡剤として、界面活性剤系のものよりも蛋白分解質系の
ものが気泡の細かさ、強さ等で優れており、また、更に
少ＩのＰＶＡ等の添加をすると気泡が安定し、好ましい
性状を与える。Foaming agents that prepare microbubbles include protein derivatives such as gelatin and casein (proteolytic), resin soaps such as pine resin, and synthetic resin surfactants (surfactant).
However, in the hydraulic composition used in the present invention, protein-based foaming agents are superior to surfactant-based foaming agents in terms of bubble fineness and strength. Furthermore, when a smaller amount of PVA or the like is added, the bubbles become stable and provide desirable properties.
気泡群と混合するセメントミルクは早強性のセメントを
水／セメント比０．６〜０．４の範囲で用いることが好
ましい、この比が０．６よりも高い場合には、分離を生
じるために好ましくなく、また、０．４より低い場合に
は、粘性増を招くために好ましくない。It is preferable to use early-strength cement as the cement milk to be mixed with the air bubbles, with a water/cement ratio in the range of 0.6 to 0.4. If this ratio is higher than 0.6, separation will occur. Moreover, when it is lower than 0.4, it is not preferable because it causes an increase in viscosity.
発泡機はガラスピーズを主体とする発泡媒体のものが優
れ、気泡群とセメンエースラリ−の混合は例えば５００
ｒｐｍ程度の高性能連続ミキサーが望ましい。It is best to use a foaming machine with a foaming medium mainly composed of glass peas.
A high performance continuous mixer at around rpm is desirable.
このようにして得られた軽重気泡コンクリートは透水係
数ｋがＩ Ｘ １０−”ｃｖａ／秒以下の小さい値が得
られるが、長期の浸水状態、被圧水状態では、なお透水
の危険性があるために、高い地下水位のもとにある土壌
等に該軽量気泡コンクリートを打設する場合には、更に
排水処理が必要となる。Although the light and heavy cellular concrete obtained in this way has a small permeability coefficient k of less than I x 10-''cva/sec, there is still a risk of water permeation in long-term submerged or pressurized water conditions. Therefore, when the lightweight cellular concrete is placed in soil or the like with a high groundwater level, further wastewater treatment is required.
排水処理としては軽量気泡コンクリートと高い地下水水
位のもとにある土壌の接する而に排水パイプまたは排水
マットを層状、溝状または筒状等に設置することによっ
て行なうことができる。上述の排水処理と並行して排水
処理と軽量気泡コンクリート中に施すこともできる。Drainage treatment can be carried out by installing drainage pipes or drainage mats in a layered, grooved or cylindrical shape between the lightweight cellular concrete and the soil under high groundwater levels. In parallel with the above-mentioned wastewater treatment, it can also be applied to wastewater treatment and lightweight aerated concrete.
なお、排水処理に使用する排水パイプ及び排水マットは
慣用のものを使用することができる。Note that conventional drainage pipes and drainage mats can be used for wastewater treatment.
［実 施 例〕 以下に実施例を挙げ、本発明を更に説明する。[Example〕 The present invention will be further explained with reference to Examples below.
丸１燵
本例は軽量気泡コンクリートを傾斜面に打設する場合に
おける、本発明による防水工法を説明するものである。This example explains the waterproofing method according to the present invention when lightweight aerated concrete is cast on an inclined surface.
早強ポルトランドセメントを用い、水／セメント比０．
６のセメントミルクを形成し、このセメントミルク１容
に、蛋白質分解質系起泡剤（商品名：ニスコートＫ）の
３％液にＰＶＡ０．５％を添加した発泡液及び１ 、０
ｋｙ／ ａｍ”の圧縮空気をビーズ式発泡機に通して
形成した気泡群を４容配合し、５００ ｒｐｍのミキサ
ーで均一に撹拌して得られた超軽量気泡コンクリート（
見掛比重ρ＝０．３３．１４日材令の圧縮強さσ、 ４
＝ ５．０ｋｙｆ ／ ａｍ２、気泡率７９．５％）
を図に記載するような湧水のある傾斜面へ打設した。Early-strength Portland cement was used, with a water/cement ratio of 0.
To 1 volume of this cement milk, a foaming liquid made by adding 0.5% PVA to a 3% solution of a proteolytic foaming agent (trade name: Niskort K) and 1,0
ky/am" compressed air is passed through a bead-type foaming machine, 4 volumes of air bubbles are mixed, and the mixture is uniformly stirred using a mixer at 500 rpm.
Apparent specific gravity ρ = 0.33.14 days old compressive strength σ, 4
= 5.0kyf/am2, bubble rate 79.5%)
The concrete was placed on a slope with spring water as shown in the figure.
この際に、予め排水処理として、合成繊維を主体とした
透水性の高い排水マットな打設面に設置しておいた。At this time, as a wastewater treatment, it was installed in advance on a drainage mat surface made of synthetic fibers with high water permeability.
なお、比較工法として、上述の軽量気泡コンクリートを
単独で打設したが、２週間後には表面まで濡れ状態とな
った。As a comparative method, the above-mentioned lightweight aerated concrete was poured alone, but the surface became wet after two weeks.
本発明工法により打設したものは２週間後にも表面が完
全に乾燥状態であった。The surface of the concrete cast by the method of the present invention remained completely dry even after two weeks.
［発明の効果］
本発明工法により軽量気泡コンクリートに防水性が付与
できると、土木用途において、軽量気泡コンクリートの
軽重性及び断熱性が充分に発揮され、支持力が充分にと
れない地盤での盛土代用または壁体として、また、水際
構造材として、その用途は極めて広い。[Effect of the invention] If waterproofness can be imparted to lightweight cellular concrete using the construction method of the present invention, the lightweight cellular concrete's light weight and heat insulation properties can be fully demonstrated in civil engineering applications, and it can be used for embankments on grounds that do not have sufficient bearing capacity. Its uses are extremely wide, including as a substitute or wall, and as a waterfront structural material.
図は実施例における本発明工法の実施形態を示す図であ
る。
特許出願人 小野田セメント株式会社
小野田ケミコ株式会社The figure is a diagram showing an embodiment of the construction method of the present invention in Examples. Patent applicant: Onoda Cement Co., Ltd. Onoda Chemico Co., Ltd.
Claims (1)
にある土壌とが接する面に、排水パイプまたは排水マッ
トを層状、溝状または筒状に設置し、次に、導入気泡を
独立且つ均一に分散した軽量気泡コンクリートであって
、透水係数ｋを１×１０＾−＾６ｃｍ／秒以下に抑えた
軽量気泡コンクリートを打設することを特徴とする軽量
気泡コンクリートの防水工法。Drainage pipes or drainage mats are installed in layers, grooves or cylinders at least on the contact surface between lightweight aerated concrete and soil under high groundwater level, and then the introduced air bubbles are independently and uniformly distributed. A waterproofing method for lightweight foamed concrete, which is characterized by casting lightweight foamed concrete with a permeability coefficient k of 1×10^-^6 cm/sec or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61147096A JPS634122A (en) | 1986-06-25 | 1986-06-25 | Water-proof construction for light-weight gas concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61147096A JPS634122A (en) | 1986-06-25 | 1986-06-25 | Water-proof construction for light-weight gas concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS634122A true JPS634122A (en) | 1988-01-09 |
Family
ID=15422393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61147096A Pending JPS634122A (en) | 1986-06-25 | 1986-06-25 | Water-proof construction for light-weight gas concrete |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS634122A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110409490A (en) * | 2019-08-06 | 2019-11-05 | 夏倩倩 | A kind of freeze proof retaining wall of hydraulic engineering |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6168934A (en) * | 1984-09-10 | 1986-04-09 | Tadamichi Ao | Sheathing work |
-
1986
- 1986-06-25 JP JP61147096A patent/JPS634122A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6168934A (en) * | 1984-09-10 | 1986-04-09 | Tadamichi Ao | Sheathing work |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110409490A (en) * | 2019-08-06 | 2019-11-05 | 夏倩倩 | A kind of freeze proof retaining wall of hydraulic engineering |
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