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Late performance of concrete with different binders under early curing at 45 ° C

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Document pages: 13 pages

Abstract: It is generally believed that high curing temperature (close to 60 ° C or higher) will reduce the mechanical properties and durability of concrete compared with normal curing temperature. In many cases, the internal temperature of early concrete structures is not as high as 60 ℃. This paper studies the early curing and later performance of concrete at 45 ° C. Concrete cured at 20 ° C is used as the reference sample. Four different kinds of concrete are used: plain cement concrete, concrete containing fly ash, concrete containing ground blast furnace slag (GGBS) and concrete containing silica fume. The results show that for each kind of concrete, the high-temperature curing after pre curing has no adverse effect on the non evaporable water content, butessive strength, permeability to chloride ions, and the connected porosity of concrete at late ages compared with standard curing. Additionally, high-temperature curing improves the late-age properties of concrete containing fly ash and GGBS.

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