【摘要】 混凝土的气体渗透性是混凝土耐久性的重要衡量指标,且与微观结构密切相关。聚丙烯-玄武岩纤维混凝土、聚丙烯-钢纤维混凝土与普通混凝土在氯盐浸泡120、150、180、210、240、270、300 d后,利用NELD-BL038混凝土透气性测定仪得到气体扩散系数,利用RapidAir 457测试系统得到纤维混凝土试件的空气含量、胶体与空气比和气泡间距系数等气泡特征参数。试验表明:氯盐作用下,聚丙烯-玄武岩纤维混凝土和聚丙烯-钢纤维混凝土的抗气体渗透性能优于普通混凝土。更多还原

【Abstract】 The permeability of concrete is an important measure of the durability of concrete and closely related to microstructure. After Polypropylene-basalt fiber reinforced concrete,polypropylene-steel fiber concrete and ordinary concrete soaking 120,150,180,210,240,270,300 days in the chloride salt,got the gas diffusion coefficient used NELD-BL038 concrete permeability tester to,and obtained the air content of colloidal concrete samples,colloid and air ratio and bubble spacing coefficient and other bubble characteristics parameters by Rapid Air 457 test system. The results showed that the anti-seepage performance of polypropylenebasalt fiber concrete and polypropylene-steel fiber concrete was better than that of ordinary concrete under the action of chloride salt.更多还原