李 琴1,张春红2,陈秋玲3,孙可伟4
李琴,张春红,陈秋玲,等.不同温度下水泥、粉煤灰再生微粉体系反应程度与抗压强度关系[J].混凝土与水泥制品,2017(3):9-14.
LI Q, ZHANG C H, CHEN Q L,et al.Relationship Between Reaction Degree and Compressive Strength for Cement and Fly Ash Regeneration Powder System under Different Temperatures[J].China Concrete and Cement Products,2017(3):9-14.
不同温度下水泥、粉煤灰再生微粉体系反应程度与抗压强度 关系
李 琴1,张春红2,陈秋玲3,孙可伟4
李琴,张春红,陈秋玲,等.不同温度下水泥、粉煤灰再生微粉体系反应程度与抗压强度关系[J].混凝土与水泥制品,2017(3):9-14.
LI Q, ZHANG C H, CHEN Q L,et al.Relationship Between Reaction Degree and Compressive Strength for Cement and Fly Ash Regeneration Powder System under Different Temperatures[J].China Concrete and Cement Products,2017(3):9-14.
摘 要:根据共存于体系中水泥、活性物质水化反应中间物Ca(OH)2产生和消耗,研究其水化反应动力学特征,以此为基础计算在不同养护温度、养护时间及体系中粉煤灰量对水泥、活性物质的水化程度大小,并以此配比进行抗压强度试验。研究结果发现当养护温度低于40℃时,体系的水化程度与抗压强度均随着温度升高、龄期延长、粉煤灰量增加而提高;养护温度高于40℃时,体系水化程度随着温度升高,龄期延长而升高,尤其是15%粉煤灰掺量时水泥能够完全水化。高于40℃体系抗压强度随着温度升高而降低,随着龄期延长而增大,高温时体系水化程度和抗压强度变化趋势不同。
Abstract: Cement and active substances hydration reaction kinetics characteristics are researched in the coexisting system by researching their hydration reaction intermediate Ca(OH)2 consumption rate. And the calculation on the hydration degree of cement and fly ash with the dosage of fly ash at different temperature and curing time is carried out. And the experiment ratio of the compressive strength on the recycle mortar is determined. The results shows that when the curing temperature is lower than 40℃, the degree of hydration and compressive strength of the system increases with the temperature, age extension and the fly ash dosage. When the curing temperature is higher than 40℃, the hydration degree increases with the temperature increase and age extension, especially when the fly ash content is 15%, the cement could be completely hydrated. The compressive strength of the system decreases with increasing temperature, when curing temperature is higher than 40℃, the trend of hydration and compressive strength varied with the age extension.
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