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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。
According to the generation and consumption of hydration reaction intermediates Ca (OH) 2, which are coexisting in the system, the kinetics of hydration reaction was studied. Based on this, the effects of different curing temperature, curing time and system on fly ash The amount of cement, the degree of hydration of active substances, and the ratio of compressive strength test. The results show that when the curing temperature is lower than 40 ℃, the degree of hydration and compressive strength of the system increase with temperature, age, and fly ash increased; when the curing temperature is higher than 40 ℃, the system water As the temperature increases, the age increases and increases, especially when the content of 15% fly ash cement can be completely hydrated. The compressive strength of the system above 40 ℃ decreases with the increase of temperature, and increases with the increase of age. The trend of hydration and compressive strength of the system is different at high temperature.