【摘 要】
：
When the low strength grade of steam-curing concrete is produced, the temperature which the concrete leaves steam-curing kiln is about 20℃ commonly.The tem
【机 构】
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School of Materials Science and Engineering, Shenyang Jianzhu University, Shenyang 100071, China
【出 处】
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The 14th International Congress on the Chemistry of Cement (
论文部分内容阅读
When the low strength grade of steam-curing concrete is produced, the temperature which the concrete leaves steam-curing kiln is about 20℃ commonly.The temperature difference is too large between the environmental temperature and the temperature which the concrete leaves steam-curing kiln when the daily average temperature drops to 10℃.Because the steam-curing concrete is cooled rapidly, a lagre of crack will be produced in concrete and the internal structure of concrete will be damaged normally.Then the performance of concrete will be influenced badly.In order to improve the negative effect on concrete by steam curing, the different supplementary curing is used after steam curing.The C30 concrete is made in this research.The daily average temperature is 5℃~10℃ and the minimum temperature is-6℃ during the test.After the concrete is formed, it is placed in 20℃ environment for 2h first.Then the concrete is heated to 55℃ in 2h and maintained for 8h in the steam-curing kiln.In the end, the concrete is cooled to 20℃ in 3h.After steam curing, the standard curing and covering by wet fabric or film outside are used separately for concrete.
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