露石剂的作用机理研究

STUDY ON MECHANISM OF ACTION OF AGGREGATE EXPOSING SOLVENT

通过不同浓度梯度露石剂试验,并设置不同温度梯度的混凝土养护环境对比试验,设置基准组与添加露石剂的对照组进行混凝土水化热试验。结果表明:露石清扫时间和露石深度随露石剂浓度增加呈现增加趋势,但超过一定浓度值后清扫时间和清扫后的露石深度均不再增加;混凝土成型后,表面水膜消失速率随养护环境温度升高而逐渐加快,露石剂喷洒时间随之缩短。基准和添加露石剂的水泥混凝土随恒温养护时间增加,放热速率曲线均呈现先增加再降低的趋势,但添加露石剂的对照组放热速率最大值、最大放热速率、混凝土1400min的放热量均有所减小和推迟。

The experiment was carried out by using different concentration gradient of the aggregate exposing solvent test, and set up the concrete health environment with different temperature gradient, the concrete hydration heat test was carried out with the control group with the addition of aggregate exposing solvent. The results show that the cleaning time and the depth of EACCP is increasing with the increase of the concentration of aggregate exposing solvent, but they are not increased.,after the certain concrete, the disappearance rate of the surface water film increases with the increase of the temperature of the health environment, and the spraying time of the terring agent is shortened. The hydration heat release rate of the cement concrete of the addaggregate exposing solvent groups and unadded groups increased with the increase of the constant temperature, and the exothermic rate curves show a tendency to increase first and then decrease. However, the maximum exothermic rate, the maximum exothermic rate and the heat release rate of concrete 1 400min were reduced and delayed of the addaggregate exposing solvent groups.