改性聚丙烯纤维混凝土氯离子扩散试验研究

聚丙烯纤维通过提高混凝土的早期抗裂能力增强了混凝土的抗渗性能。将掺入改性聚丙烯纤维的混凝土试件浸泡于3.5%NaCl溶液和青岛海域海水溶液中,测试混凝土不同深度的氯离子浓度,并计算不同腐蚀龄期混凝土的氯离子扩散系数,通过对比分析,研究掺入改性聚丙烯粗纤维或粗细混杂纤维后的混凝土的抗氯离子腐蚀性能。研究结果表明,掺加改性聚丙烯纤维能提高混凝土抗氯离子腐蚀性能,降低氯离子在混凝土中的扩散速率,且掺粗、细混杂纤维的效果要好于单掺纤维。

Experimental research on chloride diffusion of modified polypropylene fiber concrete

Polypropylene fiber would enhance impervious performance of concrete through improve early cracking resistance.Firstly immerse modified polypropylene fiber concrete specimens in 3.5% NaCl solution and seawater,then measure chloride ion concentration at different depths in the concrete,and calculate chloride ion diffusion coefficient in different corrosion age.The anti-chloride corrosion is researched by comparing and analysis the different concrete mixing with modified polypropylene fiber and hybrid fibers....