WO1991019687A1 - Composition a durcissement rapide - Google Patents

Composition a durcissement rapide Download PDF

Info

Publication number
WO1991019687A1
WO1991019687A1 PCT/JP1990/000797 JP9000797W WO9119687A1 WO 1991019687 A1 WO1991019687 A1 WO 1991019687A1 JP 9000797 W JP9000797 W JP 9000797W WO 9119687 A1 WO9119687 A1 WO 9119687A1
Authority
WO
WIPO (PCT)
Prior art keywords
weight
setting
cement
component
fast
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.)
Ceased
Application number
PCT/JP1990/000797
Other languages
English (en)
Japanese (ja)
Inventor
Yoshio Tanaka
Tetsuro Tsutsumi
Keiji Saito
Hisanobu Tanaka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Mining and Cement Co Ltd
Original Assignee
Mitsubishi Mining and Cement Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Mining and Cement Co Ltd filed Critical Mitsubishi Mining and Cement Co Ltd
Priority to PCT/JP1990/000797 priority Critical patent/WO1991019687A1/fr
Publication of WO1991019687A1 publication Critical patent/WO1991019687A1/fr
Anticipated expiration legal-status Critical
Priority to US08/053,340 priority patent/US5273579A/en
Ceased legal-status Critical Current

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
    • C04B7/00—Hydraulic cements
    • C04B7/14—Cements containing slag
    • C04B7/147—Metallurgical slag
    • C04B7/153—Mixtures thereof with other inorganic cementitious materials or other activators
    • 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
    • C04B28/08—Slag cements
    • 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
    • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/10—Accelerators; Activators
    • C04B2103/14—Hardening accelerators
    • 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
    • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/20—Retarders
    • C04B2103/22—Set retarders
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding

Definitions

  • TECHNICAL FIELD-The present invention relates to a quick-setting composition, and more particularly to a quick-setting composition using metallurgical slag containing calcium aluminate as a main component.
  • a fast-setting material sodium carbonate, calcium chloride, water is added to Portland cement or mixed cement. Glasses and other setting accelerators are added, and some resins use fast-setting cements such as aluminum cement and jet cement. ing .
  • a fast-curing material obtained by adding a setting accelerator to a portland cement or a mixed cement an early setting after kneading is required. It is difficult to apply to places where low strength is required and high strength is required.
  • some of the additives may elute water-soluble substances during or after application, and may cause pollution.
  • fast-curing cements such as alumina cement and jet cement can be used at temperatures as high as 135 to 150 when firing. It is very expensive because it requires a long time. Because of this, these quick-setting cements are costly and should only be used when special work or urgency is required. However, the range of use is limited.
  • the jet cement has the disadvantage that the fluidity is lost immediately after kneading and that the time required to maintain the fluidity required for the work after kneading is short. Even if the pot life is extended by using a setting retarder in order to solve this drawback, a sufficient improvement effect cannot be obtained and workability is not improved.
  • Metallurgical slag mainly composed of calcium aluminate, which is produced in large quantities, has properties that are effective as a raw material for a quick-setting composition.
  • a rapid-curing composition containing this metallurgical slag as a component was filed earlier by the present applicant (Japanese Patent Application Laid-Open No. 62-260749, 6. 3-2 7 7 5 4 2).
  • Fast-curing composition of this are found in, 1 2 C a O '7 A ⁇ 2 0 3 as a main component metallurgical slag and ⁇ type anhydrous gypsum, were mixed together and ground flocculation modifier (delay modifier)
  • the quick-hardening component is usually used in combination with a Portland cement or a mixed cement to obtain fast-hardening properties.
  • Metallurgical slag is a by-product of the steelmaking and refining process, and its chemical composition fluctuates. However, depending on the chemical composition, the strength development of the quick-setting composition, etc. Are different from each other, and sufficient characteristics may not be obtained in some cases. For example, a fast-curing composition using a metallurgical slag having a Ca 0 / AJ £ 2O 3 ratio of 1.3 or less has a short-term strength development of 3 hours in material age. Good, but 3 days old, 7 days old after 1 day, the increase in strength is extremely poor.
  • the present invention can obtain good strength development even if the metallurgical slag components fluctuate, is excellent in strength development at low temperatures, and is easy to adjust the setting. It is intended to provide an inexpensive quick-setting composition.
  • the quick-setting composition of the present invention comprises a cement component consisting of a Portland cement and a cement or a mixed cement, and a two-part composition with respect to the cement component.
  • a fast-curing composition comprising about 50% by weight of a quick-setting component and 0.1 to 5% by weight of a setting modifier based on the total weight of the cement component and the quick-setting component.
  • the fast-hardening component is 40 to 95% by weight of fine metallurgical slag
  • Alkaline carbonate is added to the mixture at 5 to 60% by weight.
  • the setting regulator consists of an organic acid-based setting retarder, aluminum sulfate and Z or calcium salt.
  • the fine metallurgical slag suitable for the present invention is a metal slag by-produced in the process of removing impurities in the steel material when producing high-quality stainless steel.
  • This metallurgical slag rather ⁇ shown in Table 1 infra, Chi sales of I human studies component of that, the weight ratio of C a OZA J2 2 0 3 0 8 ⁇ :. Ru Oh in the range of I 8. .
  • Re good in its X-ray diffraction, and the main component 1 2 C a O ⁇ 7 A 2 O 3 ( hereinafter. "(: 12 A 7" and you hereinafter) includes, other M of its g O, 3 C a O * A jZ 2 0 3.
  • C 3 A Including (hereinafter you abbreviated as "C 3 A”.). Also, depending on the cooling conditions, this metallurgical slag may be sudden. If ordered, it becomes glassy, and if slowed down, it becomes crystalline, and most of it is dusted, easily scattered as dust, and difficult to handle. In the present invention, it is possible to use a rapidly cooled glass mass or a slowly cooled crystalline dusting powder. Wear .
  • the gypsum type anhydrous gypsum used in the present invention may be either by-product gypsum by-product in the process of producing hydrofluoric acid or natural gypsum (anhydrite, gypsum dihydrate), and if necessary. Any type that has been calcined at 650 to 850 t: to form type II anhydrous stone can be used.
  • the quick-setting component of the quick-setting composition of the present invention is a mixture of 40 to 95% by weight of such fine metallurgical slag and 5 to 60% by weight of type II anhydrous gypsum. Alkali is added with 5 to 20% by weight.
  • the fine metallurgical slag is less than 40% by weight, the strength development is insufficient, and if it exceeds 95% by weight, the long-term strength development is inferior. If the type II anhydrous gypsum is less than 5% by weight, the long-term strength development is poor, and if it exceeds 60% by weight, the obtained cured product may be swelled and fractured. .
  • the amount of the aluminum carbonate added is less than 3% by weight based on the total weight of the metallurgical slag and the type-II anhydrous gypsum, the use of a small amount of the quick-hardening component, which is a feature of the present invention.
  • the strength is less than 10 and the strength is increased by using ordinary Portland cement, which has a different brand of cement manufacturer. Expression may be significantly reduced.
  • ASiaO3 ratio of 1.30 or less among the chemical components of the metallurgical and slag the obtained cured product is obtained.
  • the amount of added alkaline carbonate exceeds 20% by weight, there is no remarkable difference in the effect of the addition, causing a rise in the cost of the village charges and an increase in the amount of Eguchi mouth. It is feared that this may occur, which is not desirable. Therefore, the above-mentioned addition amount of the alkali carbonate is set to 3 to 20% by weight.
  • sodium carbonate, calcium carbonate, and the like can be used as the alkali carbonate.
  • metallurgical slag has a Brain value of 400 to 800 cirf Zg
  • type II anhydrous gypsum has a Brain value of 400 to 0800 Cirf / g each, pulverize them, add and mix with calcareate, and pulverize if necessary.Also, pulverize metallurgical slag etc. in advance. It is also possible to mix the mixture without grinding and pulverize to a Brain value of 400 to 800 ctrf / Zg.
  • the Brain value of the metallurgical slag used is less than 400 cirf Zg, the strength manifestation becomes poor, and 800 cnf Zg Exceeding the crushing cost increases.
  • the Brain value of type II anhydrous stone cultivation is less than 400 cirf / g, the strength development is poor, and the obtained cured product hardens when immersed in water. Abnormal swelling of the body may occur.
  • Ma if the weight exceeds 800 cm 2 g, the cost of pulverization rises.
  • metallurgical slag and ⁇ type anhydrous gypsum the Ru have use also of the ground to a pre Mebu lanes value 4 0 0 0 ⁇ 8 0 0 0 cm 2 / g is Shi good or Rere.
  • examples of the organic acid-based setting retarder include oxycarbonic acid or a salt thereof. .
  • it is composed of carboxylic acids such as tartaric acid, citric acid, lingic acid, and dalconic acid, or their sodium salts.
  • carboxylic acids such as tartaric acid, citric acid, lingic acid, and dalconic acid, or their sodium salts.
  • species such as lucium salt are listed.
  • examples of the alkyl sulfate include sodium sulfate, potassium sulfate, and the like.
  • examples of the calcium salt include calcium chloride, calcium carbonate, and sodium hydroxide.
  • the setting modifier is preferably prepared by mixing 0.25 to 7 parts by weight of an alkyl sulfate and / or a calcium salt with respect to 1 part by weight of the organic acid-based setting retarder. It is better.
  • the proportion of aluminum sulfate and / or calcium salt is less than 0.25 parts by weight ⁇ )
  • the initial strength development is reduced, and when it exceeds 7 parts by weight, the delay is slow.
  • the rolling effect is significantly reduced.
  • sodium citrate can be used in place of citric acid, but it is better to use citric acid.
  • the setting modifier is used in an amount of 0.1 to 5% by weight based on the total weight of the cement component and the quick-setting component. If the amount of the setting modifier is less than 0.1% by weight, a retarding effect cannot be expected, and if it exceeds 5% by weight, excessive retardation occurs and the composition is out of the usable range as a quick-setting composition. You.
  • the amount of setting additive required to secure the pot life differs significantly depending on the working temperature.
  • the amount of coagulant added to obtain a pot life of about 30 minutes is the conventional coagulation adjustment of carboxylic acid: alkaline carbonate-1: 4 (weight ratio).
  • the working temperature is 0.20 to 0.25% by weight for 20: and 0.7 to: 1.0% by weight for 5 :.
  • the amount of addition was significantly different.
  • the addition amount of the setting modifier is 0.15 to 0.25% by weight, and when the working temperature is about 5 t, The content should be 0.3 to 0.4% by weight, and the difference in the addition amount due to the temperature difference is very small.
  • the quick-setting composition of the present invention can be easily prepared by adding and mixing a predetermined amount of a cement component, a quick-setting component and a setting modifier, and has a kneading water amount of 30 to 100. By kneading in a weight%, it is possible to obtain a high-strength hardened body with excellent setting properties and workability.
  • the amount of setting modifier shown in Table 5 was added to the sum of the total amount of the cement and the quick-setting component, and the amount of water was 50% by weight (based on the total amount of the cement and the quick-setting component). Ment milk was prepared.
  • the metallurgical slag used in each of the examples was any of metallurgical slag Nos. 1 to 3 having the composition shown in Table 1 below, which were by-produced during stainless steelmaking. . This is found that, in Table 1 Ri by the X-ray diffraction indicates' to - ⁇ rather a main component in C 12 A 7, other M g O, and this the C 3 A you are free Yes Check and review. l Table
  • the setting modifier is as shown in Table 2 below.
  • a cement milk was made in the same manner as in Example 1 except that the composition shown in Table 5 was used, and the molding temperature, the pot life and the compressive strength were measured, and the results were measured. Table 5 shows.
  • the quick-setting components and setting modifiers used in the comparative examples are those shown in Tables 3 and 4 below, respectively. ⁇ ⁇ 3 ⁇ 4 3 ⁇
  • No.2 80 20 A 0.15 20 37 91 268 355 384 Application 3 No.3 80: 20 A 0.15 20 30 89 266 334 373 Example 4 No.2 80: 20 B 0.20 20 34 83 254 329 377
  • the rapid-curing composition of the present invention exhibited sufficient strength even with the addition of a small amount of the rapid-curing component, and was almost blended even when the working temperature changed.
  • the same hardening time can be obtained, and that even if the chemical composition of the metallurgical slag changes, it is possible to secure the required strength development. .
  • the quick-setting composition of the present invention As described above in detail, according to the quick-setting composition of the present invention, stable and good setting properties and workability can be ensured at a wide range of working temperatures. However, sufficient strength development can be obtained with a small amount of the fast-hardening component added, and the composition is not affected by the components of the metallurgical slag used. The desired characteristics can be easily adjusted. For this reason, the quick-setting composition of the present invention can be used easily and effectively without performing a preliminary test or the like, and a high-strength solidified product is obtained. This will be possible.
  • the rapid-curing composition of the present invention can be provided at low cost because fine metallurgical slag, which is a by-product * of the steelmaking and refining process, is used, and the processing cost is low. It is effective for reduction.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

Composition à durcissement rapide susceptible de présenter une résistance à basse température et quelle que soit la composition chimique du laitier métallurgique. Ladite composition est peu coûteuse, son durcissement peut être régulé, et elle comporte un constituant ciment comprenant du ciment portland et/ou un ciment mixte, un constituant à durcissement rapide comprenant de 2 à 50 % en poids (pourcentage absolu par rapport au constituant ciment) d'un mélange entre 40 et 95 % en poids de laitier métallurgique pulvérisé, entre 60 et 5 % en poids de gypse anhydre du type II, et d'entre 3 et 20 % en poids (également un pourcentage absolu) de carbonate de métal alcalin, ainsi qu'un agent régulateur du durcissement comprenant de 0,1 à 5 % en poids, sur la base du poids global du ciment et des constituants à durcissement rapide, d'un mélange retardateur à base d'acide organique et de sulfate de métal alcalin et/ou de sulfate de calcium.
PCT/JP1990/000797 1990-06-19 1990-06-19 Composition a durcissement rapide Ceased WO1991019687A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP1990/000797 WO1991019687A1 (fr) 1990-06-19 1990-06-19 Composition a durcissement rapide
US08/053,340 US5273579A (en) 1990-06-19 1993-04-28 Quick setting compositions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP1990/000797 WO1991019687A1 (fr) 1990-06-19 1990-06-19 Composition a durcissement rapide

Publications (1)

Publication Number Publication Date
WO1991019687A1 true WO1991019687A1 (fr) 1991-12-26

Family

ID=13986592

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1990/000797 Ceased WO1991019687A1 (fr) 1990-06-19 1990-06-19 Composition a durcissement rapide

Country Status (1)

Country Link
WO (1) WO1991019687A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3125316B2 (ja) 1991-03-29 2001-01-15 三菱マテリアル株式会社 温度緩衝型速硬性組成物
JP2006089337A (ja) * 2004-09-24 2006-04-06 Nippon Steel & Sumikin Stainless Steel Corp カルシウムアルミネート系鉄鋼スラグからなるセメントなどの水硬性組成物
FR2891270A1 (fr) * 2005-09-28 2007-03-30 Lafarge Sa Liant hydraulique comportant un systeme ternaire d'acceleration, mortiers et betons comportant un tel liant
FR2952050A1 (fr) * 2009-11-05 2011-05-06 Saint Gobain Weber France Liants pour materiaux de construction
JP2019202911A (ja) * 2018-05-23 2019-11-28 住友大阪セメント株式会社 セメント組成物及びその製造方法、セメントモルタルの製造方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52121632A (en) * 1976-04-06 1977-10-13 Tokuyama Soda Kk Quickkhardening cement composition
JPS62260749A (ja) * 1986-05-07 1987-11-13 三菱マテリアル株式会社 急硬性セメント及びその製法
JPS62278156A (ja) * 1986-05-27 1987-12-03 電気化学工業株式会社 蒸気養生用セメント組成物
JPS63277542A (ja) * 1987-05-08 1988-11-15 Mitsubishi Mining & Cement Co Ltd 速硬性組成物

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52121632A (en) * 1976-04-06 1977-10-13 Tokuyama Soda Kk Quickkhardening cement composition
JPS62260749A (ja) * 1986-05-07 1987-11-13 三菱マテリアル株式会社 急硬性セメント及びその製法
JPS62278156A (ja) * 1986-05-27 1987-12-03 電気化学工業株式会社 蒸気養生用セメント組成物
JPS63277542A (ja) * 1987-05-08 1988-11-15 Mitsubishi Mining & Cement Co Ltd 速硬性組成物

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3125316B2 (ja) 1991-03-29 2001-01-15 三菱マテリアル株式会社 温度緩衝型速硬性組成物
JP2006089337A (ja) * 2004-09-24 2006-04-06 Nippon Steel & Sumikin Stainless Steel Corp カルシウムアルミネート系鉄鋼スラグからなるセメントなどの水硬性組成物
FR2891270A1 (fr) * 2005-09-28 2007-03-30 Lafarge Sa Liant hydraulique comportant un systeme ternaire d'acceleration, mortiers et betons comportant un tel liant
WO2007039694A3 (fr) * 2005-09-28 2007-05-24 Lafarge Sa Liant hydraulique comportant un systeme ternaire d'acceleration, mortiers et betons comportant un tel liant
US8075687B2 (en) 2005-09-28 2011-12-13 Lafarge Hydraulic binder comprising a ternary acceleration system and mortars and concretes comprising one such binder
FR2952050A1 (fr) * 2009-11-05 2011-05-06 Saint Gobain Weber France Liants pour materiaux de construction
WO2011055063A1 (fr) * 2009-11-05 2011-05-12 Saint-Gobain Weber Liants pour materiaux de construction
US8932402B2 (en) 2009-11-05 2015-01-13 Saint-Gobain Weber Construction materials binders
EA021984B1 (ru) * 2009-11-05 2015-10-30 Сэн-Гобэн Вебер Гидравлическое вяжущее для строительных материалов
EP3578532A1 (fr) * 2009-11-05 2019-12-11 Saint-Gobain Weber Liants pour materiaux de construction
JP2019202911A (ja) * 2018-05-23 2019-11-28 住友大阪セメント株式会社 セメント組成物及びその製造方法、セメントモルタルの製造方法

Similar Documents

Publication Publication Date Title
JP5547374B2 (ja) 注入材
JP2020183339A (ja) モルタル・コンクリート用混和材、これを含むセメント組成物、モルタル組成物及びコンクリート組成物、並びに、モルタル硬化物及びコンクリート硬化物の製造方法
CN102770388A (zh) 修补用水泥混合材、使用该修补用水泥混合材的修补用水泥组合物及修补用水泥砂浆材料
JP6655420B2 (ja) 速硬性セメント混和材および速硬性セメント組成物
JP3125316B2 (ja) 温度緩衝型速硬性組成物
JP2513154B2 (ja) 速硬性組成物の製造方法
JP2020183338A (ja) モルタル・コンクリート用混和材、これを含むセメント組成物、モルタル組成物及びコンクリート組成物、並びに、モルタル硬化物及びコンクリート硬化物の製造方法
JP5172737B2 (ja) 水硬性組成物
JP3516547B2 (ja) 吹付材料及びそれを用いた吹付工法
JP2017137286A (ja) 粉末状歯科用セメント組成物
JPH0215506B2 (fr)
JP7374926B2 (ja) 地盤注入材、その硬化物、地盤改良方法および地盤注入用粉体材料
JP3483903B2 (ja) 注入材
JP2658388B2 (ja) 速硬性組成物
JP2634613B2 (ja) セメント懸濁液組成物
JP7083637B2 (ja) コンクリートおよびその製造方法
JP3359699B2 (ja) 軽量気泡コンクリートの製造方法
JP2022057469A (ja) 生コンクリートの製造方法
JPH06206745A (ja) 改良ポルトランドセメントおよびａｌｃの製造方法
JPH02302352A (ja) 速硬型セルフレベリング性床材用組成物
JP3367576B2 (ja) セメントの水和熱発生時間調整材及びセメント組成物
JPH04164847A (ja) セメント混和材およびセメント組成物
JPH04280846A (ja) 場所打ちライニング工法用セメント組成物及びそれを使用したトンネルの施工方法
JPWO1991019687A1 (ja) 速硬性組成物
JP2021102528A (ja) モルタル・コンクリート用混和材、これを含むセメント組成物、モルタル組成物及びコンクリート組成物、並びに、モルタル硬化物及びコンクリート硬化物の製造方法

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): JP US