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SAKAI, K.; WATANABE, H. Development of low-heat high-strength concrete. In: INTERNATIONAL CONGRESS ON HIGH-PERFORMANCE AND QUALITY OF CONCRETE STRUCTURES, 1996, Florianópolis. Anais... Florianópolis, 1996. p. 202-212.
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Abstract

In general, high-strength concrete shows a high heat of hydration and low-heat concrete produces low-strength. Both properties are in conflict according to conventional concrete technology. However, the authors have shown that it is possible to produce a concrete with low-heat and high-strength by properly exploiting the potential of the materials used. The study reported here was conducted in order to clarify a limit in high-strength and low-heat concrete. As admixtures, a super-ground granulated blast-famace slag and a silica fume were used. High-range water-reducing agent and gypsum were also used. A moderate heat portland cement and a low-heat portland cement were used. The maximum compressive strengths obtained were approximately 84 N/mm² and 120 N/mm² at the age of 3 days and 91 days under 20°C curing, respectively. The corresponding maximum adiabatic temperature rise was approximately 30°C. Under 5°C curing, the compressive strengths were 35 N/mm² at the age of 3 days. However, the strengths after 7 days were almost the same as those under 20°C curing.
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