透水混凝土透水系数试验方法的影响因素  

Influencing Factors of Permeability Test Methods of Pervious Concrete

作　　者：陈晋栋 王武祥[1,2] 张磊蕾[1,2] 廖礼平[1] 王爱军[1] CHEN Jin-dong;WANG Wu-xiang;ZHANG Lei-lei;LIAO Li-ping;WANG Ai-jun(China Building Materials Academy1.State Key Laboratory of Green Building Materials;Beijing 100024,China)

机构地区：[1]中国建筑材料科学研究总院,北京100024 [2]中国建筑材料科学研究总院绿色建筑材料国家重点实验室,北京100024

出　　处：《科学技术与工程》2018年第16期251-255,共5页Science Technology and Engineering

基　　金：国家重点研发计划(2016YFC0701001)资助

摘　　要：以自来水作为试验用水,分别采用定水头法和落水头法对透水混凝土的透水系数进行测量。研究了自来水、透水混凝土试件饱水与否对两种试验方法的影响。结果表明,采用自来水作为试验用水,对落水头法无影响;但是对定水头法影响很大,气泡堵塞在透水混凝土孔隙内致使定水头透水系数随时间的持续不断减小,气泡之所以能够堵塞在孔隙内,是因为溢流水槽中的水起到了水封作用。此外,透水混凝土试件饱水与否对透水系数试验影响甚微。最后,对两种透水系数试验方法进行了对比分析。Constant water permeability and falling water permeability of pervious concrete were measured by using tap water as test water,and the influences of tap water and water saturation of pervious concrete on those two test methods were investigated. The results show that the use of tap water as the test water has little effect on the falling water test method,but there is an impact on the constant water test method,the constant water permeability of pervious concrete decreases with time because of air bubbles＇ clogging in the pores of pervious concrete,and the reason air bubbles clog in the pores is that the water in the overflow tank plays a role as water seal. In addition,whether the pervious concrete specimen is saturated or not has little effect on the permeability tests. Finally,two kinds of permeability test methods are compared and analyzed.

关 键 词：透水混凝土 定水头法 落水头法 透水系数 气泡 

分 类 号：TU528[建筑科学—建筑技术科学]