影响混凝土抗渗透性因素的试验研究  

EXPERIMENTAL RESEARCH ON INFLUENCING FACTORS OF CONCRETE'S ANTI-PERMEABILITY

作　　者：王黎明[1] 何松松[1] 

机构地区：[1]东北林业大学土木工程学院,哈尔滨150040

出　　处：《低温建筑技术》2013年第10期7-9,共3页Low Temperature Architecture Technology

摘　　要：水泥混凝土抗渗透性是影响其耐久性的关键指标，此次采用电通量法研究了养护龄期、水灰比、含气量、掺合料的种类和掺量对水泥混凝土抗渗透性的影响。研究表明：混凝土的抗渗透性随养护龄期的延长逐渐提高；随着水灰比的降低抗渗性呈上升趋势；随着含气量的增加在5．6％附近呈特异性规律，先降低后提高，含气量控制在5．3％～5．8％范围内时，混凝土具有较低的渗透性；混凝土中添加粉煤灰和磨细矿渣都可降低其渗透性，并且在一定范围内随掺量的增加而降低，粉煤灰的效果好于磨细矿渣粉。Impermeability of concrete is a key indicator which can affect its durabihty, we study me effect of curing period, water-cement ratio, air content, the type and dosage of admixtures on the anti- permeability of concrect by electric flux method. Studies show that： with curing period extended anti- permeability of concrete gradually increased ; with the lower water-cement ratio impermeability shows up- ward trend; with the increase in gas content, specificity rule in the vicinity of 5. 6%, the impermeability first decreased and then increased; when containing gas controlled at 5.3% to 5.8% range, the con- crete has a lower permeability; adding fly ash and ground slag to concrete can reduce its permeability, and in a certain range it decreased with the increase of dosage, the effect of fly ash is better than the ground slag.

关 键 词：水泥混凝土 抗渗透性 耐久性 掺合料 

分 类 号：TU528.0[建筑科学—建筑技术科学]