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首页> 外文期刊>Memoirs of the Faculty of Engineering KYUSHU University >Effect of Gypsum Content in Cement on the Autogenous Shrinkage of Low-Heat Portland Blast-Furnace Slag Cement Concrete
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Effect of Gypsum Content in Cement on the Autogenous Shrinkage of Low-Heat Portland Blast-Furnace Slag Cement Concrete

机译：水泥中石膏含量对低热硅酸盐高炉矿渣水泥混凝土自生收缩的影响

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摘要

When a low-heat portland blast-furnace slag cement is used, the thermal expansion strain of the concrete shows reversal shrinkage in spite of a continuous temperature rising as a result of abrupt autogenous shrinkage far greater than the thermal expansion. The autogenous shrinkage strain was studied in terms of gypsum content in cement, and was able to be reduced by increasing gypsum content in cement. Prevention of the early-age rapid hydration development of granulated blast-furnace slag at high temperature was also confirmed. Moreover, the amount of transition from ettringite to monosulfate of a hydration product was determined, and the result was related with autogenous shrinkage. Because aluminate hydrates are most affected by gypsum.
机译：当使用低热硅酸盐高炉矿渣水泥时，混凝土的热膨胀应变会发生逆向收缩，尽管连续的温度升高是由于突然的自发收缩而导致的，远大于热膨胀。根据水泥中的石膏含量研究了自生收缩应变，并且可以通过增加水泥中的石膏含量来减少自收缩应变。还证实了防止高温下粒状高炉矿渣的早期快速水合的发展。此外，确定了水合产物从钙矾石到单硫酸盐的转变量，其结果与自发收缩有关。因为铝酸盐水合物受石膏影响最大。

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