防冻剂对自燃煤矸石混凝土力学性能影响研究

为探究防冻剂对煤矸石混凝土力学性能的影响，以防冻剂种类、不同掺量和养护温度等为因素进行对比试验，分析其对煤矸石混凝土强度影响水平和作用机制。结果表明：通过单掺不同防冻剂标养煤矸石混凝土强度分析，早强效果显著性为氯化钙＞硝酸钙＞乙二醇；养护环境由负温度到正温度，基准煤矸石混凝土的抗压强度损失率与养护温度呈正相关；在-5℃和-10℃养护环境中，不同掺量3种防冻剂对负温煤矸石混凝土均起一定防冻效果，其显著性体现为氯化钙＞硝酸钙＞乙二醇。

Study of Effects of Antifreezing Agents on Mechanical Properties of Spontaneous Combustion Coal Gangue Concrete

In order to investigate thoroughly the effects of antifreezing agents on mechanical properties of coal gangue concrete, in consideration of various factors such as the kind of antifreezing agents, dosages of antifreezing agents and curing temperature, contrast test is conducted to analyze the inlfuence of these factors on coal gangue concrete strength and mechanism of action. The results show that the signiifcance of early strength, through mixing just one type of antifreezing agent each time, by analyzing compressive strength of coal gangue concrete under standard curing condition, is as follows: calcium chloride > calcium nitrate > ethylene glycol. The compressive strength loss rate of ifducial coal gangue concrete has positive correlation with curing temperature as curing environment varies from negative temperature to positive temperature. In addition, under different curing environment of -5℃ and -10℃, three types of antifreezing agents with different dosages exert antifreezing effect on negative temperature coal gangue concrete to some extent. The signiifcance of early strength is as follows: calcium chloride > calcium nitrate > ethylene glycol.