A new gas permeameter for measuring the permeability of mortar and concrete
磁导率
复合材料
导水率
多孔性
吸附性
作者
J.G. Cabrera,Cyril J. Lynsdale
出处
期刊:Magazine of Concrete Research [Thomas Telford Ltd.] 日期:1988-09-01卷期号:40 (144): 177-182被引量:114
标识
DOI:10.1680/macr.1988.40.144.177
摘要
Synopsis A permeability cell for measuring the permeability of mortar and concrete to gas is described. The problems encountered and overcome during the development of the cell are discussed. The cell is designed to test 25 mm diameter mortar samples but can also be used for 50mm diameter concrete specimens. Specimens of heights between 10 and 50mm can be tested. Measurements using the new cell are highly repeatable and reproducible. The cell is very sensitive to the influence of water/cement ratio, age and replacement of cement by pulverized-fuel ash. It can be used to obtain permeability profiles through the depth of a concrete element in order to evaluate the influence of different curing conditions or curing compounds.