MOISTURE DIFFUSION IN CEMENTITIOUS MATERIALS - ADSORPTION-ISOTHERMS

被引：258

作者：

XI, YP ^{[1
]}

BAZANT, ZP ^{[1
]}

JENNINGS, HM ^{[1
]}

机构：

[1] NORTHWESTERN UNIV,DEPT CIVIL ENGN,2145 SHERIDAN RD,EVANSTON,IL 60208

来源：

ADVANCED CEMENT BASED MATERIALS | 1994年 / 1卷 / 06期

基金：

美国国家科学基金会;

关键词：

ADSORPTION; CONCRETE; HARDENED CEMENT PASTE; MOISTURE DIFFUSION; MOISTURE EFFECTS; PERMEABILITY; POROSITY;

D O I：

10.1016/1065-7355(94)90033-7

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This article describes an improvement on a previous model proposed by Bazant and Najjar, in which moisture diffusivity and moisture capacity are treated as separate parameters. These parameters are evaluated from independent test results, and are shown to depend on the water: cement ratio, curing time, temperature, and cement type. The moisture capacity is obtained as the slope of the adsorption isotherm. A mathematical model is developed and is shown to predict experimental adsorption isotherms of Portland cement paste very well. In the present form, the model is not applicable to high temperatures.

引用

页码：248 / 257

页数：10

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