JP5610626B2 - Preparation method of low shrinkage AE concrete and low shrinkage AE concrete - Google Patents
Preparation method of low shrinkage AE concrete and low shrinkage AE concrete Download PDFInfo
- Publication number
- JP5610626B2 JP5610626B2 JP2010268620A JP2010268620A JP5610626B2 JP 5610626 B2 JP5610626 B2 JP 5610626B2 JP 2010268620 A JP2010268620 A JP 2010268620A JP 2010268620 A JP2010268620 A JP 2010268620A JP 5610626 B2 JP5610626 B2 JP 5610626B2
- Authority
- JP
- Japan
- Prior art keywords
- shrinkage
- blast furnace
- furnace slag
- concrete
- low
- 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.)
- Active
Links
- 239000004567 concrete Substances 0.000 title claims description 63
- 238000002360 preparation method Methods 0.000 title claims description 28
- 239000002893 slag Substances 0.000 claims description 57
- 238000001035 drying Methods 0.000 claims description 31
- 239000011398 Portland cement Substances 0.000 claims description 26
- 239000003638 chemical reducing agent Substances 0.000 claims description 22
- 239000004568 cement Substances 0.000 claims description 19
- 239000000843 powder Substances 0.000 claims description 17
- 239000002270 dispersing agent Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- -1 alkylene glycol monoalkyl ether Chemical class 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- 239000011362 coarse particle Substances 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- 229940028356 diethylene glycol monobutyl ether Drugs 0.000 claims description 4
- JCGNDDUYTRNOFT-UHFFFAOYSA-N oxolane-2,4-dione Chemical group O=C1COC(=O)C1 JCGNDDUYTRNOFT-UHFFFAOYSA-N 0.000 claims description 4
- 229920005646 polycarboxylate Polymers 0.000 claims description 3
- 230000008602 contraction Effects 0.000 claims description 2
- LYCAIKOWRPUZTN-UHFFFAOYSA-N ethylene glycol Natural products OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 2
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 10
- 239000004576 sand Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 6
- 238000002156 mixing Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 239000008399 tap water Substances 0.000 description 5
- 235000020679 tap water Nutrition 0.000 description 5
- 238000004898 kneading Methods 0.000 description 4
- 230000001603 reducing effect Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000004575 stone Substances 0.000 description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000000344 soap Substances 0.000 description 2
- 238000010257 thawing Methods 0.000 description 2
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 description 1
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- CSXUGXILPQAPNV-UHFFFAOYSA-N C(CCC)OC(C)COC(C)CO.C=C.C=C Chemical compound C(CCC)OC(C)COC(C)CO.C=C.C=C CSXUGXILPQAPNV-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 150000004996 alkyl benzenes Chemical class 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 229940077388 benzenesulfonate Drugs 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 239000000573 polycarboxylate cement Substances 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000003340 retarding agent Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
- 229920006163 vinyl copolymer Polymers 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Classifications
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
本発明は低収縮ＡＥコンクリートの調製方法及び低収縮ＡＥコンクリートに関する。近年、コンリート構造物の長寿命化や高品質化の観点から、コンリート構造物には特に乾燥収縮によるひび割れの発生を抑制することが要求されている。例えば、コンリート構造物の乾燥収縮によるひび割れを抑制するためには、一般建築物においては乾燥収縮率を６００μ以下程度にする必要があるといわれており、なかでも鉄筋の拘束部材断面が大きい建築物の場合には乾燥収縮率を４００μ以下程度にする必要があるといわれている。また一方で、寒冷地のコンリート構造物には同時に耐凍害性を確保する必要があることから、特に凍結融解抵抗性に優れていることが要求されている。本発明は、乾燥収縮率を４００μ以下に低減することによって乾燥収縮によるひび割れの発生を抑制し、同時に凍結融解抵抗性に優れたコンクリート構造物（以下、単に硬化体という）を得ることができる低収縮ＡＥコンクリートの調製方法及び低収縮ＡＥコンクリートに関する。 The present invention relates to a method for preparing low shrinkage AE concrete and low shrinkage AE concrete. In recent years, from the viewpoint of extending the life and quality of a concrete structure, the concrete structure is required to suppress the occurrence of cracks due to drying shrinkage. For example, in order to suppress cracking due to dry shrinkage of a concrete structure, it is said that the dry shrinkage rate is required to be about 600 μm or less in general buildings, and in particular, a building with a large cross section of a reinforcing member. In this case, it is said that the drying shrinkage should be about 400 μm or less. On the other hand, the concrete structure in a cold region is required to be particularly resistant to freezing and thawing because it is necessary to ensure frost damage resistance at the same time. In the present invention, by reducing the drying shrinkage rate to 400 μm or less, the occurrence of cracks due to drying shrinkage is suppressed, and at the same time, a concrete structure excellent in freeze-thaw resistance (hereinafter simply referred to as a cured product) can be obtained. The present invention relates to a method for preparing shrinkage AE concrete and low shrinkage AE concrete.
従来、硬化体の乾燥収縮を低減する手段として、ＡＥコンクリートの調製時に各種の乾燥収縮低減剤を使用することが知られている（例えば特許文献１参照）。一般に、乾燥収縮低減剤はＡＥコンクリートに多く添加すればするほど、その収縮低減効果が上昇する傾向があるため、大きな効果を期待する場合には練り混ぜ水の一部として無視できない程の量（例えばコンクリート１ｍ３当たり５ｋｇ以上）を使用することになる。しかし、硬化体の乾燥収縮を低減することと凍結融解抵抗性を強くすることは二律背反現象であるため、乾燥収縮低減剤を多く使用すればするほど、凍結融解抵抗性が低下するという問題がある。そのため、かかる問題に対する改善提案も報告されている（例えば特許文献２〜６参照）。しかし、乾燥収縮率を４００μ以下に低減し、同時に凍結融解抵抗性にも優れた硬化体を得るというハイレベルな段階には到っていないというのが実情である。 Conventionally, as a means for reducing the drying shrinkage of a cured body, it is known to use various drying shrinkage reducing agents during the preparation of AE concrete (for example, see Patent Document 1). In general, the more a dry shrinkage reducing agent is added to AE concrete, the more the shrinkage reducing effect tends to increase. Therefore, when a large effect is expected, an amount that cannot be ignored as a part of mixing water ( For example, 5 kg or more per 1 m 3 of concrete) is used. However, reducing the drying shrinkage and increasing the freeze-thaw resistance of the cured product is a trade-off phenomenon, so that the more the drying shrinkage reducing agent is used, the more the freeze-thaw resistance decreases. . Therefore, improvement proposals for such problems have also been reported (see, for example, Patent Documents 2 to 6). However, the actual situation is that it has not reached a high-level stage in which a drying shrinkage rate is reduced to 400 μm or less, and at the same time, a cured product having excellent freeze-thaw resistance is obtained.
本発明が解決しようとする課題は、乾燥収縮率を４００μ以下に低減し、同時に凍結融解抵抗性にも優れた硬化体を得ることができる低収縮ＡＥコンクリートの調製方法及びそのような低収縮ＡＥコンクリートを提供する処にある。 The problem to be solved by the present invention is to prepare a low-shrinkage AE concrete that can reduce the drying shrinkage rate to 400 μm or less and at the same time obtain a cured product having excellent freeze-thaw resistance, and such a low-shrinkage AE. It is a place that provides concrete.
本発明者らは、前記の課題を解決するべく研究した結果、少なくともポルトランドセメント、細骨材、粗骨材、乾燥収縮低減剤、セメント分散剤、空気量調節剤及び水を用いて低収縮ＡＥコンクリートを調製するに際し、ポルトランドセメントの一部として特定の高炉スラグ微粉末を特定割合で用い、また細骨材の一部として特定の高炉スラグ細骨材を特定割合で用い、更に乾燥収縮低減剤を特定割合で用いて、且つ単位量率を特定範囲となるようにすることが正しく好適であることを見出した。 As a result of researches to solve the above-mentioned problems, the present inventors have found that at least Portland cement, fine aggregate, coarse aggregate, dry shrinkage reducing agent, cement dispersant, air amount adjusting agent, and water are used. When preparing concrete, specific blast furnace slag fine powder is used in a specific ratio as part of Portland cement, specific blast furnace slag fine aggregate is used in a specific ratio as part of fine aggregate, and drying shrinkage reducing agent It has been found that it is correctly preferable to use a specific ratio and make the unit amount ratio within a specific range.
すなわち本発明は、少なくともポルトランドセメント、細骨材、粗骨材、乾燥収縮低減剤、セメント分散剤、空気量調節剤及び水を用いて低収縮ＡＥコンクリートを調製するに際し、ポルトランドセメントの一部として、下記の高炉スラグ微粉末を単位量７０〜３００ｋｇ／ｍ３の割合で用い、また細骨材の一部として下記の高炉スラグ細骨材を単位量１８０〜８３０ｋｇ／ｍ３の割合で用い、更に乾燥収縮低減剤を単位量３〜３０ｋｇ／ｍ３の割合で用いて、且つ下記の数１で求められる単位量率が２５〜５５％となるようにすることを特徴とする低収縮ＡＥコンクリートの調製方法に係る。また本発明は、かかる調製方法によって得られる低収縮ＡＥコンクリートに係る。 That is, the present invention provides a low-shrinkage AE concrete using at least Portland cement, fine aggregate, coarse aggregate, dry shrinkage reducing agent, cement dispersant, air amount adjusting agent and water, as part of Portland cement. The following blast furnace slag fine powder is used at a rate of unit amount 70 to 300 kg / m 3 , and the following blast furnace slag fine aggregate is used at a rate of unit amount 180 to 830 kg / m 3 as part of the fine aggregate, Further, a low shrinkage AE concrete characterized in that a drying shrinkage reducing agent is used at a rate of unit amount of 3 to 30 kg / m 3 and the unit amount ratio obtained by the following equation 1 is 25 to 55%. This relates to the preparation method. The present invention also relates to a low shrinkage AE concrete obtained by such a preparation method.
高炉スラグ微粉末：ＪＩＳ−Ａ６２０６に記載されたものであって、粉末度が４５００ｃｍ ２ ／ｇ以上で１００００ｃｍ ２ ／ｇ未満の高炉スラグ微粉末。 Blast furnace slag: JIS-A6206 be those described in, fineness is 4500 cm 2 / g or more at 10000 cm 2 / g of less than blast furnace slag.
高炉スラグ細骨材：ＪＩＳ−Ａ５０１１−１に記載されたものであって、高炉スラグ細骨材の粒度による区分に含まれるもの。 Blast furnace slag fine aggregate: The material described in JIS-A5011-1 and included in the classification according to the grain size of the blast furnace slag fine aggregate.
本発明に係る低収縮ＡＥコンクリートの調製方法（以下、単に本発明の調製方法という）は、少なくともポルトランドセメント、細骨材、粗骨材、乾燥収縮低減剤、セメント分散剤、空気量調節剤及び水を用いて低収縮ＡＥコンクリートを調製する方法である。 The method for preparing low-shrinkage AE concrete according to the present invention (hereinafter simply referred to as the preparation method of the present invention) includes at least Portland cement, fine aggregate, coarse aggregate, dry shrinkage reducing agent, cement dispersant, air amount adjusting agent, and This is a method for preparing low-shrinkage AE concrete using water.
本発明の調製方法において、ポルトランドセメントとしては早強ポルトランドセメント、普通ポルトランドセメント及び中庸熱ポルトランドセメントから選ばれるものを使用できる。なかでも、より優れた凍結融解抵抗性の硬化体を得るために、早強ポルトランドセメントが好ましい。 In the preparation method of the present invention, as the Portland cement, one selected from early-strength Portland cement, ordinary Portland cement and moderately hot Portland cement can be used. Of these, early-strength Portland cement is preferable in order to obtain a more excellent freeze-thaw resistant cured product.
本発明の調製方法では、ポルトランドセメントの少なくとも一部として高炉スラグ微粉末を用いる。用いる高炉スラグ微粉末は、ＪＩＳ−Ａ６２０６に記載されたものであって、粉末度が４５００ｃｍ ２ ／ｇ以上で１００００ｃｍ ２ ／ｇ未満のもの、好ましくは５０００〜９０００ｃｍ２／ｇのものである。かかる特定の粉末度の高炉スラグ微粉末をポルトランドセメントの一部に置き換えて使用する理由は、優れた凍結融解抵抗性の硬化体を得るためである。一般に高炉スラグ微粉末の粉末度は４０００ｃｍ２／ｇ程度であるが、粉末度が４５００より小さい高炉スラグ微粉末を用いると、充分な凍結融解抵抗性を有する硬化体を得ることができない。本発明の調製方法では、かかる高炉スラグ微粉末を、ＡＥコンクリート１ｍ３当たりの使用量、すなわち単位量が７０〜３００ｋｇ／ｍ３の割合で用い、好ましくは９０〜２８０ｋｇ／ｍ３の割合で用いる。 In the preparation method of the present invention, blast furnace slag fine powder is used as at least part of Portland cement. Blast furnace slag used in this section of the specification as described in JIS-A6206, what fineness of less than 10000 cm 2 / g at 4500 cm 2 / g or more, preferably 5000~9000cm 2 / g. The reason why the blast furnace slag fine powder having such a specific fineness is replaced with a part of Portland cement is to obtain an excellent freeze-thaw resistant cured product. In general, the fineness of the blast furnace slag fine powder is about 4000 cm 2 / g, but if a fine blast furnace slag powder having a fineness of less than 4500 is used, a cured product having sufficient freeze-thaw resistance cannot be obtained. In the preparation method of the present invention, such blast furnace slag fine powder is used at a rate of 1 to 3 AE concrete, that is, a unit amount of 70 to 300 kg / m 3 , preferably 90 to 280 kg / m 3. .
また本発明の調製方法では、細骨材の一部として高炉スラグ細骨材を用いる。用いる高炉スラグ細骨材は、ＪＩＳ−Ａ５０１１−１に記載されたものであって、高炉スラグ細骨材の粒度による区分に含まれるものである。なかでも、高炉スラグ細骨材としては、粒度による区分が５ｍｍ高炉スラグ細骨材及び／又は２．５ｍｍ高炉スラグ細骨材が好ましく、更に粗粒率を２．０〜３．１の範囲に調製したものが好ましい。本発明の調製方法では、かかる高炉スラグ細骨材を、単位量１８０〜８３０ｋｇ／ｍ３の割合で用い、好ましくは単位量２００〜７５０ｋｇ／ｍ３の割合で用いる。かかる高炉スラグ細骨材としては、その由来は特に制限されないが、高炉水砕スラグ細骨材が好ましい。以上説明した高炉スラグ細骨材以外の細骨材としては、川砂、海砂、山砂、砕砂等の天然の細骨材が挙げられる。尚、ここで粗粒率（Ｆ．Ｍ．と略記される）は、８０、４０、２０、１０、５、２．５、１．２、０．６、０．３及び０．１５(単位はｍｍ）の各ふるいからなる１組のふるいを用いて高炉スラグ細骨材をふるい分け試験し、各ふるい毎でふるいを通らない高炉スラグ細骨材の元の高炉スラグ細骨材全量に対する重量百分率を求め、更にその和を求めて、かかる和を１００で除した値であり、それ自体はセメントコンクリート用語として一般的に使用されている用語である。 In the preparation method of the present invention, blast furnace slag fine aggregate is used as a part of the fine aggregate. The blast furnace slag fine aggregate to be used is described in JIS-A5011-1 and is included in the classification according to the particle size of the blast furnace slag fine aggregate. Among them, as the blast furnace slag fine aggregate, the classification by particle size is preferably 5 mm blast furnace slag fine aggregate and / or 2.5 mm blast furnace slag fine aggregate, and the coarse particle ratio is in the range of 2.0 to 3.1. What was prepared is preferable. In the preparation method of the present invention, the blast furnace slag fine aggregate is used in a unit amount of 180 to 830 kg / m 3 , preferably in a unit amount of 200 to 750 kg / m 3 . The origin of the blast furnace slag fine aggregate is not particularly limited, but blast furnace granulated slag fine aggregate is preferable. Examples of the fine aggregate other than the blast furnace slag fine aggregate described above include natural fine aggregates such as river sand, sea sand, mountain sand, and crushed sand. Here, the coarse particle ratio (abbreviated as FM) is 80, 40, 20, 10, 5, 2.5, 1.2, 0.6, 0.3, and 0.15 (units). Is a blast furnace slag fine aggregate screened test using a set of sieves each of which is a weight percentage of the total amount of blast furnace slag fine aggregate that does not pass through each sieve relative to the original blast furnace slag fine aggregate. Is obtained by dividing the sum by 100, and as such is a term generally used as a cement concrete term.
本発明の調製方法でも、粗骨材としては、公知の川砂利、砕石、石灰砕石、軽量骨材等を使用でき、また水としては水道水を使用できる。 Also in the preparation method of the present invention, publicly known river gravel, crushed stone, lime crushed stone, lightweight aggregate or the like can be used as the coarse aggregate, and tap water can be used as the water.
また本発明の調製方法でも、乾燥収縮低減剤としては公知のものを使用できるが、なかでも（ポリ）アルキレングリコールモノアルキルエーテルが好ましく、ジエチレングリコールモノブチルエーテルがより好ましい。本発明の調製方法では、かかる乾燥収縮低減剤を、単位量３〜３０ｋｇ／ｍ３の割合で用いるが、好ましくは５〜２５ｋｇ／ｍ３の割合で用いる。 Also in the preparation method of the present invention, known drying shrinkage reducing agents can be used, among which (poly) alkylene glycol monoalkyl ether is preferable, and diethylene glycol monobutyl ether is more preferable. In the preparation method of the present invention, the drying shrinkage reducing agent is used in a unit amount of 3 to 30 kg / m 3 , preferably 5 to 25 kg / m 3 .
更に本発明の調製方法でも、セメント分散剤としては公知のものを使用できるが、なかでもポリカルボン酸塩系のものが好ましく、水溶性ビニル共重合体から成るポリカルボン酸塩系のものがより好ましい。かかるセメント分散剤としては、例えば特開昭５８−７４５５２号公報や特開平１−２２６７５７号公報に記載のものが挙げられる。本発明の調製方法では通常、かかるセメント分散剤を、セメント１００質量部当たり０．０５〜２質量部の割合で用いる。 Further, in the preparation method of the present invention, known cement dispersants can be used. Among them, polycarboxylate-based ones are preferable, and polycarboxylate-based ones composed of a water-soluble vinyl copolymer are more preferable. preferable. Examples of such cement dispersants include those described in JP-A-58-74552 and JP-A-1-226757. In the preparation method of the present invention, such a cement dispersant is usually used at a ratio of 0.05 to 2 parts by mass per 100 parts by mass of cement.
更にまた本発明の調製方法でも、空気量調節剤としては公知のものを使用できる。例えば、ポリオキシアルキレンアルキルエーテル硫酸塩、アルキルベンゼンスルホン酸塩、ポリオキシエチレンアルキルベンゼンスルホン酸塩、ロジン石けん、高級脂肪酸石けん、アルキルリン酸エステル塩、ポリオキシアルキレンアルキルエーテルリン酸エステル塩等の空気量調節剤を使用できる。本発明の調製方法では通常、かかる空気量調節剤を、セメント１００質量部当たり０．００１〜０．０１質量部の割合で用いる。 Furthermore, in the preparation method of the present invention, a known air amount adjusting agent can be used. For example, adjustment of air volume of polyoxyalkylene alkyl ether sulfate, alkylbenzene sulfonate, polyoxyethylene alkyl benzene sulfonate, rosin soap, higher fatty acid soap, alkyl phosphate ester salt, polyoxyalkylene alkyl ether phosphate salt, etc. Agents can be used. In the preparation method of the present invention, such an air amount regulator is usually used at a ratio of 0.001 to 0.01 parts by mass per 100 parts by mass of cement.
そして本発明の調製方法では、前記した数１で求められる単位量率が２５〜５５％となるようにすることが重要であり、好ましくは３０〜５０％となるようにすることが重要である。単位量率がかかる数値の範囲から外れると、本発明の所期の効果が充分に得られない。 In the preparation method of the present invention, it is important that the unit amount ratio obtained by the above-mentioned formula 1 is 25 to 55%, preferably 30 to 50%. . If the unit amount ratio is out of the numerical range, the desired effect of the present invention cannot be obtained sufficiently.
本発明の調製方法では、調製する低収縮ＡＥコンクリートの空気量を特に制限するものではないが、連行空気量は３〜７容量％となるようにするのが好ましく、３．５〜６容量％とするのがより好ましい。 In the preparation method of the present invention, the amount of air of the low-shrinkage AE concrete to be prepared is not particularly limited, but the entrained air amount is preferably 3 to 7% by volume, and preferably 3.5 to 6% by volume. Is more preferable.
本発明の調製方法では、以上説明したように、少なくともポルトランドセメント、その一部として高炉スラグ微粉末、細骨材、その一部として高炉スラグ細骨材、乾燥収縮低減剤、セメント分散剤、空気量調節剤及び水を用いてこれらを練り混ぜ、低収縮ＡＥコンクリートを調製するが、練り混ぜ手順は特に制限されない。 In the preparation method of the present invention, as described above, at least Portland cement, blast furnace slag fine powder, fine aggregate as part thereof, blast furnace slag fine aggregate as part thereof, dry shrinkage reducing agent, cement dispersant, air These are kneaded using a quantity regulator and water to prepare low-shrinkage AE concrete, but the kneading procedure is not particularly limited.
本発明の調製方法では、本発明の効果を損なわない範囲内で、必要に応じて適宜、消泡剤、防錆剤、急結剤、凝結促進剤、凝結遅延剤、防水剤等の添加剤を併用することができる。 In the preparation method of the present invention, an additive such as an antifoaming agent, a rust preventive agent, a quick setting agent, a setting accelerator, a setting retarding agent, a waterproofing agent, etc., as necessary, within a range not impairing the effects of the present invention Can be used in combination.
本発明の調製方法によると、乾燥収縮率を４００μ以下に低減し、同時に凍結融解抵抗性に優れた低収縮ＡＥコンクリートを調製することができる。その理由としては、主に以下の１）〜４）が協力して作用するためと推察される。すなわち、１）ポルトランドセメントの一部を粉末度の高い高炉スラグ微粉末に置換して用いることによって、得られる硬化体の凍結融解抵抗性を大きく改善する、２）細骨材の一部を高炉スラグ細骨材に置換して用いることによって、得られる硬化体の乾燥収縮率を充分に低減する、３）前記１）の効果により得られる硬化体が強い凍結融解抵抗性を保持するため、乾燥収縮低減剤の添加量を制限せずに所定量を混入できることによって、得られる硬化体の乾燥収縮率を大幅に低減する、４）単位量率が所定の範囲となるようにした比較的単位水量の少ない低収縮ＡＥコンクリートにすることによって、ベースとなる低収縮ＡＥコンクリート自身に起因する乾燥収縮率が大きくならないようにする。 According to the preparation method of the present invention, it is possible to prepare a low-shrinkage AE concrete having a dry shrinkage ratio reduced to 400 μm or less and at the same time excellent in freeze-thaw resistance. The reason is presumably that the following 1) to 4) act in cooperation. That is, 1) A part of Portland cement is replaced with a finely ground blast furnace slag fine powder to greatly improve the freeze-thaw resistance of the obtained hardened body. 2) A part of fine aggregate is blast furnace. By substituting with slag fine aggregate, the drying shrinkage rate of the resulting cured product is sufficiently reduced. 3) The cured product obtained by the effect of 1) maintains strong freeze-thaw resistance. By allowing a predetermined amount to be mixed without limiting the addition amount of the shrinkage reducing agent, the drying shrinkage rate of the resulting cured product is greatly reduced. 4) A relatively unit water amount in which the unit amount rate falls within a predetermined range. By using low-shrinkage AE concrete with a small amount, the dry shrinkage rate caused by the low-shrinkage AE concrete itself serving as a base is not increased.
本発明に係る低収縮ＡＥコンクリートは以上説明した本発明の調製方法によって得られるものである。かかる低収縮ＡＥコンクリートのなかでも、得られる硬化体の乾燥収縮率が１５０〜４００μ（１５０×１０−６〜４００×１０−６）となるものが好ましい。 The low-shrinkage AE concrete according to the present invention is obtained by the preparation method of the present invention described above. Among such low-shrinkage AE concretes, those having a drying shrinkage of 150 to 400 μm (150 × 10 −6 to 400 × 10 −6 ) are preferable.
本発明に係る低収縮ＡＥコンクリートは、建設現場で打設される低収縮ＡＥコンクリートとしてだけでなく、コンクリート製品工場で加工される二次製品用の低収縮ＡＥコンクリートとしても適用できる。 The low-shrinkage AE concrete according to the present invention can be applied not only as a low-shrinkage AE concrete placed at a construction site but also as a low-shrinkage AE concrete for a secondary product processed in a concrete product factory.
本発明によると、得られる硬化体が優れた圧縮強度を発現するだけでなく、乾燥収縮率が低く、しかも凍結融解抵抗性が強いという効果がある。 According to the present invention, the obtained cured product not only exhibits excellent compressive strength, but also has an effect of low drying shrinkage and strong freeze-thaw resistance.
以下、本発明の構成及び効果をより具体的にするため、実施例等を挙げるが、本発明が該実施例に限定されるというものではない。なお、以下の実施例等において、別に記載しない限り、％は質量％を、また部は質量部を意味する。 Hereinafter, in order to make the configuration and effects of the present invention more specific, examples and the like will be described. However, the present invention is not limited to the examples. In the following examples and the like, unless otherwise indicated,% means mass%, and part means mass part.
試験区分１（低収縮ＡＥコンクリートの調製）
実施例１〜７
表１に記載の調合条件で、５０Ｌのパン型強制練りミキサーに、ポルトランドセメント、高炉スラグ微粉末、高炉スラグ細骨材、砕砂、空気量調節剤（竹本油脂社製のＡＥ調節剤、商品名ＡＥ−３００）、セメント分散剤（竹本油脂社製のポリカルボン酸塩系セメント分散剤、商品名チューポールＨＰ−１１）及び乾燥収縮低減剤（ジエチレングリコールモノブチルエーテル）のそれぞれ所要量を水（水道水）の所要量と共に投入して４５秒間練り混ぜた。次に、粗骨材の所要量を投入して６０秒間練り混ぜ、目標スランプが１２±１ｃｍ、目標空気量が４．５±０．５％の範囲とした低収縮ＡＥコンクリートを調製した。尚、空気量調節剤及びセメント分散剤の使用量は下記の通りとした（これらは以下同じ）。
空気量調節剤：ポルトランドセメントの単位量及び高炉スラグ微粉末の単位量の合計１００部に対し、０．００２〜０．００７部となる割合で用いた。
セメント分散剤：ポルトランドセメントの単位量及び高炉スラグ微粉末の単位量の合計１００部に対し、０．５〜１．５部（固形分換算で０．１２〜０．３８部）となる割合で用いた。
Test category 1 (Preparation of low shrinkage AE concrete)
Examples 1-7
Under the mixing conditions shown in Table 1, 50L pan-type forced kneading mixer, Portland cement, blast furnace slag fine powder, blast furnace slag fine aggregate, crushed sand, air amount regulator (AE regulator manufactured by Takemoto Yushi Co., Ltd., trade name) AE-300), cement dispersant (polycarboxylate cement dispersant manufactured by Takemoto Yushi Co., Ltd., trade name Tupol HP-11), and drying shrinkage reducing agent (diethylene glycol monobutyl ether) are each supplied with water (tap water). ) And kneaded for 45 seconds. Next, the required amount of coarse aggregate was added and kneaded for 60 seconds to prepare low-shrinkage AE concrete having a target slump of 12 ± 1 cm and a target air amount of 4.5 ± 0.5%. In addition, the usage-amount of the air quantity regulator and the cement dispersing agent was as follows (these are the same below).
Air amount regulator: Used in a ratio of 0.002 to 0.007 parts with respect to a total of 100 parts of the unit quantity of Portland cement and the unit quantity of blast furnace slag fine powder.
Cement dispersant: In a ratio of 0.5 to 1.5 parts (0.12 to 0.38 parts in terms of solid content) with respect to a total of 100 parts of the unit quantity of Portland cement and the unit quantity of blast furnace slag fine powder. Using.
比較例１〜１２
表１に記載の調合条件で、５０Ｌのパン型強制練りミキサーに、ポルトランドセメント、砕砂、空気量調節剤（実施例１〜７と同じ）、セメント分散剤（実施例１〜７と同じ）及び乾燥収縮低減剤（実施例１〜７と同じ）等のそれぞれ所要量を水（水道水）の所要量と共に投入して４５秒間練り混ぜた。次に、粗骨材の所要量を投入して６０秒間練り混ぜ、目標スランプが１２±１ｃｍ、目標空気量が４．５±０．５％の範囲とした低収縮ＡＥコンクリートを調製した。
Comparative Examples 1-12
In the mixing conditions shown in Table 1, in a 50 L pan-type forced kneading mixer, Portland cement, crushed sand, air amount regulator (same as Examples 1-7), cement dispersant (same as Examples 1-7) and Each required amount of a drying shrinkage reducing agent (same as in Examples 1 to 7) and the like was added together with the required amount of water (tap water) and kneaded for 45 seconds. Next, the required amount of coarse aggregate was added and kneaded for 60 seconds to prepare low-shrinkage AE concrete having a target slump of 12 ± 1 cm and a target air amount of 4.5 ± 0.5%.
実施例８〜１２
表１に記載の調合条件で、５０Ｌのパン型強制練りミキサーに、ポルトランドセメント、高炉スラグ微粉末、高炉スラグ細骨材、砕砂、空気量調節剤（実施例１〜７と同じ）、セメント分散剤（実施例１〜７と同じ）及び乾燥収縮低減剤（ジエチレンジプロピレングリコールモノブチルエーテル）のそれぞれ所要量を水（水道水）の所要量と共に投入して４５秒間練り混ぜた。次に、粗骨材の所要量を投入して９０秒間練り混ぜ、目標スランプが１８±１ｃｍ、目標空気量が４．５±０．５％の範囲とした低収縮ＡＥコンクリートを調製した。
Examples 8-12
Portland cement, ground granulated blast furnace slag, ground granulated blast furnace slag, crushed sand, air volume regulator (same as in Examples 1 to 7), cement dispersion under the mixing conditions described in Table 1 The required amounts of the agent (same as in Examples 1 to 7) and the drying shrinkage reducing agent (diethylenedipropylene glycol monobutyl ether) were added together with the required amount of water (tap water) and kneaded for 45 seconds. Next, the required amount of coarse aggregate was added and kneaded for 90 seconds to prepare low-shrinkage AE concrete with a target slump of 18 ± 1 cm and a target air amount of 4.5 ± 0.5%.
比較例１３〜１６
表１に記載の調合条件で、５０Ｌのパン型強制練りミキサーに、ポルトランドセメント、砕砂、空気量調節剤（実施例１〜７と同じ）、セメント分散剤（実施例１〜７と同じ）及び乾燥収縮低減剤（実施例１〜７と同じ）等のそれぞれ所要量を水（水道水）の所要量と共に投入して４５秒間練り混ぜた。次に、粗骨材の所要量を投入して６０秒間練り混ぜ、目標スランプが１８±１ｃｍ、目標空気量が４．５±０．５％の範囲とした低収縮ＡＥコンクリートを調製した。
Comparative Examples 13-16
In the mixing conditions shown in Table 1, in a 50 L pan-type forced kneading mixer, Portland cement, crushed sand, air amount regulator (same as Examples 1-7), cement dispersant (same as Examples 1-7) and Each required amount of a drying shrinkage reducing agent (same as in Examples 1 to 7) and the like was added together with the required amount of water (tap water) and kneaded for 45 seconds. Next, the required amount of coarse aggregate was added and kneaded for 60 seconds to prepare low-shrinkage AE concrete with a target slump of 18 ± 1 cm and a target air amount of 4.5 ± 0.5%.
比較例１７及び１８
比較例１３〜１６と同様にして、それぞれ表１に示した単位量率＝２４．４％又は単位量率＝６０．０％の調合条件とした低収縮ＡＥコンクリートを調製した。
Comparative Examples 17 and 18
In the same manner as in Comparative Examples 13 to 16, low-shrinkage AE concretes were prepared with blending conditions of unit amount rate = 24.4% or unit amount rate = 60.0% shown in Table 1, respectively.
表１において、
Ｐ−１：高炉スラグ微粉末（粉末度＝６０００、密度＝２．９０ｇ／cｍ３）
Ｐ−２：高炉スラグ微粉末（粉末度＝８０００、密度＝２．８８ｇ／cｍ３）
ＰＲ−１：高炉スラグ微粉末（粉末度＝４０００、密度＝２．９１ｇ／cｍ３）
Ｃ−１：早強ポルトランドセメント（粉末度＝４５２０、密度＝３．１４ｇ／cｍ３）
Ｃ−２：普通ポルトランドセメント（粉末度＝３３００、密度＝３．１６ｇ／cｍ３）
ＳＧ−１：高炉スラグ細骨材（粒度による区分＝５ｍｍ、粗粒率＝２．５５、密度＝２．７７ｇ／cｍ３）
ＳＧ−２：高炉スラグ細骨材（粒度による区分＝２．５ｍｍ、粗粒率＝２．７１、密度＝２．７２ｇ／cｍ３）
砕砂：津久見産砕砂（密度＝２．６７ｇ／ｃｍ３）
粗骨材：秩父産石灰砕石（密度＝２．７０ｇ／cｍ３）
Ａ−１：ジエチレングリコールモノブチルエーテル
Ａ−２：ジエチレンジプロピレングリコールモノブチルエーテル
In Table 1,
P-1: Ground granulated blast furnace slag (fineness = 6000, density = 2.90 g / cm 3 )
P-2: ground granulated blast furnace slag (fineness = 8000, density = 2.88 g / cm 3 )
PR-1: ground granulated blast furnace slag (fineness = 4000, density = 2.91 g / cm 3 )
C-1: Early strong Portland cement (fineness = 4520, density = 3.14 g / cm 3 )
C-2: Ordinary Portland cement (fineness = 3300, density = 3.16 g / cm 3 )
SG-1: Blast furnace slag fine aggregate (classification by particle size = 5 mm, coarse particle ratio = 2.55, density = 2.77 g / cm 3 )
SG-2: Blast furnace slag fine aggregate (classification by particle size = 2.5 mm, coarse particle ratio = 2.71, density = 2.72 g / cm 3 )
Crushed sand: Crushed sand from Tsukumi (density = 2.67 g / cm 3 )
Coarse aggregate: lime crushed stone from Chichibu (density = 2.70 g / cm 3 )
A-1: Diethylene glycol monobutyl ether A-2: Diethylene dipropylene glycol monobutyl ether
試験区分２（低収縮ＡＥコンクリートの評価）
試験区分１で調製した各例の低収縮ＡＥコンクリートについて、調製直後の空気量及びスランプを下記のように求め、結果を表２にまとめて示した。また各例の低収縮ＡＥコンクリートから得た硬化体について、乾燥収縮率、凍結融解抵抗性の指標としての凍結融解耐久性指数及び圧縮強度を下記のように求め、結果を表２にまとめて示した。
Test category 2 (Evaluation of low shrinkage AE concrete)
For the low-shrinkage AE concrete of each example prepared in Test Category 1, the air amount and slump immediately after preparation were determined as follows, and the results are summarized in Table 2. Moreover, about the hardened | cured material obtained from the low shrinkage | contraction AE concrete of each example, the freeze shrinkage durability index and compressive strength as an index of dry shrinkage rate, freeze-thaw resistance were calculated | required as follows, and a result is shown in Table 2 collectively. It was.
・空気量（容量％）：調製直後のコンクリートについて、ＪＩＳ−Ａ１１２８に準拠して測定した。
・スランプ（ｃｍ）：空気量の測定と同時に、ＪＩＳ−Ａ１１０１に準拠して測定した。
-Air amount (volume%): It measured based on JIS-A1128 about the concrete immediately after preparation.
-Slump (cm): Measured according to JIS-A1101 simultaneously with the measurement of the air amount.
・乾燥収縮率：ＪＩＳ−Ａ１１２９に準拠し、各例の低収縮ＡＥコンクリートを２０℃×６０％ＲＨの条件下で保存した材齢２６週の供試体について、コンパレータ法により乾燥収縮ひずみを測定し、乾燥収縮率を求めた。この数値は小さいほど、乾燥収縮が小さいことを示す。
・凍結融解耐久性指数（３００サイクル）：各例の低収縮ＡＥコンクリートの硬化体について、ＪＩＳＡ１１４８に準拠して測定した値を用い、ＡＳＴＭ−Ｃ６６６−７５の耐久性指数で計算した値を示した。この数値は、最大値が１００で、１００に近いほど、凍結融解に対する抵抗性が優れていることを示す。
・圧縮強度（Ｎ／ｍｍ２）：各例の低収縮コンクリートの硬化体について、ＪＩＳ−Ａ１１０８に準拠し、材齢７日と材齢２８日で測定した。
-Drying shrinkage: In accordance with JIS-A1129, dry shrinkage strain was measured by a comparator method for a 26-week-old specimen in which the low-shrinkage AE concrete of each example was stored at 20 ° C x 60% RH. Then, the drying shrinkage was determined. The smaller this value, the smaller the drying shrinkage.
-Freeze-thaw durability index (300 cycles): Using the values measured in accordance with JIS A 1148 for the cured products of low-shrinkage AE concrete in each example, the values calculated by the ASTM-C666-75 durability index were shown. . This numerical value indicates that the maximum value is 100, and the closer to 100, the better the resistance to freezing and thawing.
-Compressive strength (N / mm < 2 >): About the hardened | cured material of the low shrinkage concrete of each example, based on JIS-A1108, it measured by material age 7 days and material age 28 days.
表２において、
＊１：材料分離して所望の流動性が得られなかったので測定しなかった。
乾燥収縮率の場合は４００μ（４００×１０−６）以下、凍結融解耐久性指数の場合は８０％以上をクリアしたときを記号○、またクリアできなかったときを記号×で示した。
In Table 2,
* 1: Measurement was not performed because the desired fluidity could not be obtained by separating the materials.
In the case of the drying shrinkage rate, 400 μ (400 × 10 −6 ) or less, and in the case of the freeze / thaw durability index, the symbol “◯” indicates that 80% or more is cleared, and the symbol “x” indicates that it cannot be cleared.
表２の結果からも明らかなように、各実施例の低収縮ＡＥコンクリートは、流動性が確保されると同時に、得られる硬化体の乾燥収縮率が４００μよりも小さく、同時に凍結融解耐久性指数が高く、必要とされる充分な圧縮強度が得られている。これに対して各比較例の低収縮ＡＥコンクリートの場合では、すなわち、高炉スラグ微粉末を使用しなかった場合、また粉末度が所定の範囲から外れた高炉スラグ微粉末を使用した場合、また高炉スラグ細骨材を使用しなかった場合、また高炉スラグ細骨材の単位量を所定の範囲から外れて使用した場合、また乾燥収縮低減剤の単位量を所定の範囲から外れて使用した場合、また単位量率が所定の範囲から外れた場合などでは、各実施例の低収縮ＡＥコンクリートのような結果が得られていない。 As is clear from the results in Table 2, the low-shrinkage AE concrete of each example has fluidity, and at the same time, the resulting cured product has a drying shrinkage ratio of less than 400 μm, and at the same time, a freeze-thaw durability index. And a sufficient compressive strength required is obtained. On the other hand, in the case of the low shrinkage AE concrete of each comparative example, that is, when the blast furnace slag fine powder is not used, when the blast furnace slag fine powder whose fineness is out of the predetermined range is used, When the slag fine aggregate is not used, when the unit amount of the blast furnace slag fine aggregate is used outside the predetermined range, or when the unit amount of the drying shrinkage reducing agent is used outside the predetermined range, In addition, when the unit amount ratio is out of the predetermined range, the result like the low shrinkage AE concrete of each example is not obtained.
Claims (11)
高炉スラグ微粉末：ＪＩＳ−Ａ６２０６に記載されたものであって、粉末度が４５００ｃｍ ２ ／ｇ以上で１００００ｃｍ ２ ／ｇ未満の高炉スラグ微粉末。
高炉スラグ細骨材：ＪＩＳ−Ａ５０１１−１に記載されたものであって、高炉スラグ細骨材の粒度による区分に含まれるもの。
Blast furnace slag: JIS-A6206 be those described in, fineness is 4500 cm 2 / g or more at 10000 cm 2 / g of less than blast furnace slag.
Blast furnace slag fine aggregate: The material described in JIS-A5011-1 and included in the classification according to the grain size of the blast furnace slag fine aggregate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010268620A JP5610626B2 (en) | 2010-12-01 | 2010-12-01 | Preparation method of low shrinkage AE concrete and low shrinkage AE concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010268620A JP5610626B2 (en) | 2010-12-01 | 2010-12-01 | Preparation method of low shrinkage AE concrete and low shrinkage AE concrete |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2012116712A JP2012116712A (en) | 2012-06-21 |
| JP5610626B2 true JP5610626B2 (en) | 2014-10-22 |
Family
ID=46500015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2010268620A Active JP5610626B2 (en) | 2010-12-01 | 2010-12-01 | Preparation method of low shrinkage AE concrete and low shrinkage AE concrete |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP5610626B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5748271B2 (en) * | 2011-03-04 | 2015-07-15 | 株式会社竹中工務店 | Non-shrink AE concrete composition |
| JP5953247B2 (en) * | 2013-02-20 | 2016-07-20 | ランデス株式会社 | Composition for mortar or concrete having improved frost damage resistance using blast furnace slag, molded product obtained by molding the composition, repair material and repair method |
| JP6130767B2 (en) * | 2013-10-11 | 2017-05-17 | ランデス株式会社 | Mortar or concrete composition with improved frost resistance using blast furnace slag fine aggregate, molded product formed by molding the same, and method for producing molded product |
| CN108047389B (en) * | 2017-12-07 | 2020-07-03 | 科之杰新材料集团有限公司 | Preparation method of low-sensitivity concrete fluidity stabilizer |
| CN108047388B (en) * | 2017-12-07 | 2020-07-03 | 科之杰新材料集团有限公司 | Preparation method of shrinkage-reducing concrete fluidity stabilizer |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0680460A (en) * | 1992-08-27 | 1994-03-22 | Sumitomo Metal Ind Ltd | High-strength cement composition and production of ultrafine powder of granulated blast furnace slag for the composition |
| JP2002321950A (en) * | 2001-04-24 | 2002-11-08 | Taiheiyo Cement Corp | Filler cement composition |
| JP2006008442A (en) * | 2004-06-24 | 2006-01-12 | Abekogyosho Co Ltd | Prestressed concrete structure |
| JP4500325B2 (en) * | 2007-04-26 | 2010-07-14 | 株式会社竹中工務店 | Shrinkage reducing AE concrete composition |
| JP4994289B2 (en) * | 2008-04-07 | 2012-08-08 | 株式会社竹中工務店 | Ultra-low shrinkage AE concrete composition |
| JP5330895B2 (en) * | 2008-05-19 | 2013-10-30 | 克紀 綾野 | Molded product formed by molding mortar or concrete composition |
| JP5008202B2 (en) * | 2008-06-25 | 2012-08-22 | 株式会社竹中工務店 | Preparation method of ultra-low shrinkage AE concrete and ultra-low shrinkage AE concrete |
| JP2010006662A (en) * | 2008-06-27 | 2010-01-14 | Mitsubishi Materials Corp | Highly durable concrete composition and method for producing highly durable concrete |
| JP5058098B2 (en) * | 2008-08-21 | 2012-10-24 | オリエンタル白石株式会社 | Method for preparing low shrinkage AE concrete for civil engineering and low shrinkage AE concrete for civil engineering |
| JP4707197B2 (en) * | 2008-10-23 | 2011-06-22 | 竹本油脂株式会社 | Method for preparing low shrinkage AE concrete for civil engineering and low shrinkage AE concrete for civil engineering |
| JP4798806B2 (en) * | 2009-06-29 | 2011-10-19 | 竹本油脂株式会社 | Low shrinkage AE concrete composition using blast furnace cement |
-
2010
- 2010-12-01 JP JP2010268620A patent/JP5610626B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP2012116712A (en) | 2012-06-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7670425B2 (en) | Ultra high strength fiber-reinforced cement composition, ultra high strength fiber-reinforced mortar or concrete and ultra high strength cement additives | |
| WO2001058823A1 (en) | Method for producing a blended cementitious composition | |
| EP2890657B1 (en) | Mortar with hydroxyethyl methyl cellulose for self-compacting concrete | |
| JP6022747B2 (en) | High strength mortar composition | |
| JP4798806B2 (en) | Low shrinkage AE concrete composition using blast furnace cement | |
| JP5610626B2 (en) | Preparation method of low shrinkage AE concrete and low shrinkage AE concrete | |
| JP4906374B2 (en) | Secondary concrete product and method for determining its composition | |
| JP5008202B2 (en) | Preparation method of ultra-low shrinkage AE concrete and ultra-low shrinkage AE concrete | |
| JP5748271B2 (en) | Non-shrink AE concrete composition | |
| Ngo et al. | Effect of high loss on ignition-fly ash on properties of concrete fully immersed in sulfate solution | |
| JP5702608B2 (en) | High strength mortar composition | |
| JP3385884B2 (en) | High fluidity cement composition | |
| JPH0986976A (en) | High fluidity cement composition | |
| JP6133596B2 (en) | Expanded material and expanded concrete | |
| JP5815250B2 (en) | Mortar composition | |
| JP4994289B2 (en) | Ultra-low shrinkage AE concrete composition | |
| JP3970616B2 (en) | High performance concrete | |
| JP2009161385A (en) | Crushed shell material for concrete admixture and concrete containing the same | |
| JP4979365B2 (en) | Concrete using concrete admixture | |
| JP5997807B2 (en) | High strength mortar composition | |
| JP5592807B2 (en) | High toughness and high strength mortar composition | |
| JP4810914B2 (en) | Fine powder for concrete composition, fresh concrete and method for improving fluidity thereof | |
| JP6959151B2 (en) | Mortar composition and mortar | |
| JP2017171513A (en) | Concrete for pavement | |
| JP7384636B2 (en) | How to improve the fire resistance of high-strength mortar or high-strength concrete |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20131004 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20140627 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20140714 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20140804 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20140901 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20140901 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 5610626 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |