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METHOD FOR PREPARING BLAST FURNACE SLAG-CONTAINING CONCRETE, BLAST FURNACE SLAG-CONTAINING CONCRETE AND HARDENED BODY THEREOF
PROBLEM TO BE SOLVED: To provide a method for preparing a blast furnace slag-containing concrete, blast furnace slag-containing concrete and a hardened body thereof, capable of concurrently and sufficiently solving the following problems 1) to 3): 1) blast furnace slag-containing concrete has low temporal flow retention (slump retention) after preparation; 2) a hardened body obtained from the blast furnace slag-containing concrete has a low compressive strength; and 3) when the blast furnace slag-containing concrete is subjected to a thermal history in which temperature rises due to heat evolution in the curing process caused by hydration, the compressive strength of a hardened body obtained decreases.SOLUTION: The method for preparing blast furnace slag-containing concrete uses a binder, water, fine aggregate, coarse aggregate, and a multifunctional admixture. Relative to 100 parts by mass of a specific binder with a composition ratio of 40 to 75 mass% of blast furnace slag fine powder, 23 to 53 mass% of portland cement, and 2 to 7 mass% of gypsum (total: 100 mass%), 0.1 to 1.5 parts by mass of a specific multifunctional admixture which contains three specific components with a specific ratio is used.
【課題】１）高炉スラグ含有コンクリートは、調製後の経時的な流動保持性（スランプ保持性）が低い、２）高炉スラグ含有コンクリートは、得られる硬化体の圧縮強度が低い、３）高炉スラグ含有コンクリートは、水和反応により硬化する過程での発熱により温度上昇する熱履歴を受けると、得られる硬化体の圧縮強度が低下するという、以上の１）〜３）の問題を同時に且つ充分に解決できる高炉スラグ含有コンクリートの調製方法、該調製方法によって得られる高炉スラグ含有コンクリート及びその硬化体を提供する。【解決手段】結合材、水、細骨材、粗骨材及び多機能混和剤を用いる高炉スラグ含有コンクリートの調製方法であって、高炉スラグ微粉末を４０〜７５質量％、ポルトランドセメントを２３〜５３質量％及び石膏を２〜７質量％（合計１００質量％）の割合で含有してなる特定の結合材１００質量部当たり、特定の３成分を特定割合で含有してなる特定の多機能混和剤を０．１〜１．５質量部の割合となるよう用いた。【選択図】なし
METHOD FOR PREPARING BLAST FURNACE SLAG-CONTAINING CONCRETE, BLAST FURNACE SLAG-CONTAINING CONCRETE AND HARDENED BODY THEREOF
PROBLEM TO BE SOLVED: To provide a method for preparing a blast furnace slag-containing concrete, blast furnace slag-containing concrete and a hardened body thereof, capable of concurrently and sufficiently solving the following problems 1) to 3): 1) blast furnace slag-containing concrete has low temporal flow retention (slump retention) after preparation; 2) a hardened body obtained from the blast furnace slag-containing concrete has a low compressive strength; and 3) when the blast furnace slag-containing concrete is subjected to a thermal history in which temperature rises due to heat evolution in the curing process caused by hydration, the compressive strength of a hardened body obtained decreases.SOLUTION: The method for preparing blast furnace slag-containing concrete uses a binder, water, fine aggregate, coarse aggregate, and a multifunctional admixture. Relative to 100 parts by mass of a specific binder with a composition ratio of 40 to 75 mass% of blast furnace slag fine powder, 23 to 53 mass% of portland cement, and 2 to 7 mass% of gypsum (total: 100 mass%), 0.1 to 1.5 parts by mass of a specific multifunctional admixture which contains three specific components with a specific ratio is used.
【課題】１）高炉スラグ含有コンクリートは、調製後の経時的な流動保持性（スランプ保持性）が低い、２）高炉スラグ含有コンクリートは、得られる硬化体の圧縮強度が低い、３）高炉スラグ含有コンクリートは、水和反応により硬化する過程での発熱により温度上昇する熱履歴を受けると、得られる硬化体の圧縮強度が低下するという、以上の１）〜３）の問題を同時に且つ充分に解決できる高炉スラグ含有コンクリートの調製方法、該調製方法によって得られる高炉スラグ含有コンクリート及びその硬化体を提供する。【解決手段】結合材、水、細骨材、粗骨材及び多機能混和剤を用いる高炉スラグ含有コンクリートの調製方法であって、高炉スラグ微粉末を４０〜７５質量％、ポルトランドセメントを２３〜５３質量％及び石膏を２〜７質量％（合計１００質量％）の割合で含有してなる特定の結合材１００質量部当たり、特定の３成分を特定割合で含有してなる特定の多機能混和剤を０．１〜１．５質量部の割合となるよう用いた。【選択図】なし
METHOD FOR PREPARING BLAST FURNACE SLAG-CONTAINING CONCRETE, BLAST FURNACE SLAG-CONTAINING CONCRETE AND HARDENED BODY THEREOF
高炉スラグ含有コンクリートの調製方法、高炉スラグ含有コンクリート及びその硬化体
YONEZAWA TOSHIO (author) / AOKI MASAMICHI (author) / INOUE KAZUMASA (author) / KOJIMA MASAO (author) / TSUJI DAIJIRO (author) / MATSUSHITA TETSURO (author) / MURAKAMI HIROKI (author) / IWASHIMIZU TAKASHI (author) / KANDA TETSUSHI (author) / SAKATA NOBORU (author)
2015-08-20
Patent
Electronic Resource
Japanese
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