摘要
通过对不同灰砂比、不同组分配合比的水泥砂浆分别进行ASTM C1202电通量法与气体渗透试验,探讨两种方法在应用中的选择取舍问题。结果表明,水泥砂浆的抗渗性能与水胶比和掺合料种类联系密切。对于水胶比大的水泥砂浆,两种试验方法下结果具有良好的相关性;而对于水胶比较小的水泥砂浆,可选用气体渗透法。未掺加掺合料的砂浆可采用电通量法测定氯离子渗透性来评价,而掺加掺合料的砂浆宜选用气体渗透法来检测其抗渗性,应用中需综合分析选用。
ASTM C1202 test of electric flux and gas permeability testing method are adopted to the cement mortar of different cement-aggregate ratio and different mix proportion. The purpose of the experiment is to explore the appropriate method in the application. It is showed that the permeability of cement mortar is closely related to the water-cement ratio and admixture varieties. As to the cement mortar of high water-cement ratio, the results of these two methods bear good relativity and the gas permeability method can be applied to that of low water-cement ratio. The permeability of cement mortar without admixtures can be evaluated by electric flux method while the gas permeability test could be used to detect the cement mortar with admixtures. The two methods should be selected according to practical conditions.
出处
《混凝土与水泥制品》
北大核心
2013年第1期20-23,27,共5页
China Concrete and Cement Products
关键词
电通量法
气体渗透法
掺合料
抗渗性
Electric flux method
Gas permeability test
Admixtures
Permeability
