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通过水化热分析,发现矿粉取代部分水泥后,水化总放热量减少,随掺量的增加,水化热降低幅度变大;掺NS与之相反;掺入硅灰后,水化总放热量减少,随掺量的增加,水化热降低幅度变大,但早期水化热增加。通过水泥胶砂干缩试验方法,发现矿粉取代部分水泥后,试样收缩变形减少,随掺量的增加,减少幅度增加,掺NS则相反;而硅灰掺量较少时能减小收缩变形,掺量大时会增加收缩变形。通过改变蒸汽养护过程中的恒温温度,测试水泥砂浆干缩变形,当蒸汽养护温度低于60℃时,各体系收缩变形均随温度的升高而减小,高于60℃时,各体系收缩变形均随温度升高而增加,70℃是收缩变形最大温度点。
Hydration heat analysis showed that the total hydration of hydration decreased with the addition of slag, and the decrease of hydration heat became larger with the increase of dosage. In contrast, when NS was mixed with silica fume, the total hydration With the increase of dosage, the decrease of hydration heat becomes larger, but the hydration heat of early stage increases. Through the shrinkage test of cement mortar, it is found that the shrinkage deformation of the sample decreases with the replacement of part of cement by the ore powder. With the increase of the dosage, the decreasing extent increases and the NS is the opposite. When the content of silica fume is small, the shrinkage can be reduced Deformation, the amount of large will increase the shrinkage deformation. The shrinkage deformation of the mortar was tested by changing the constant temperature during the steam curing process. When the steam curing temperature was lower than 60 ℃, the shrinkage of each system decreased with the increase of temperature. When the temperature was above 60 ℃, the shrinkage of the system Deformation are increased with increasing temperature, 70 ℃ is the maximum shrinkage deformation temperature point.