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橡胶颗粒掺量及粗细对水泥混凝土路面抗渗及抗冻影响

, PP. 34-39

Keywords: 道路工程,橡胶集料混凝土,正交设计,氯离子,抗盐冻

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Abstract:

以橡胶颗粒取代细集料砂子的取代率及细度模数为变量,采用二因素、四水平的正交试验,研究橡胶颗粒掺量和粗细程度对水泥混凝土路面抗渗及抗冻的影响。结果表明橡胶颗粒的掺入有效提高了混凝土的抗氯离子渗透和抗盐冻性能。橡胶颗粒的取代率和细度模数对混凝土抗氯离子渗透性影响显著,橡胶颗粒的取代率对混凝土抗盐冻性影响特别显著,细度模数对混凝土抗盐性影响显著。当混凝土中掺入细度模数为1.38的特细橡胶粉,且掺量为细集料的40%(体积比)时,混凝土抗氯离子渗透电通量为527C,抗盐冻等级为F500。

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