Oxygen and water vapour transport in cement-silica fume pastes

被引：8

作者：

Cabrera, JG

Claisse, PA

机构：

[1] Univ Leeds, Sch Civil Engn, Civil Engn Mat Unit, Leeds LS2 9JT, W Yorkshire, England

[2] Coventry Univ, Dept Built Environm, Coventry CV1 5SB, W Midlands, England

来源：

CONSTRUCTION AND BUILDING MATERIALS | 1999年 / 13卷 / 07期

关键词：

cement-silica fume; pastes; vapour flow;

D O I：

10.1016/S0950-0618(99)00039-2

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Partial replacement of cement with Silica Fume (SF) has been proposed as a method of reducing the corrosion rate of embedded reinforcing steer in concrete. Experimental work has been carried out to determine the effect of the SF on the transport rates of oxygen and water in cementitious samples. By analysing the effect of different pressure drops across the samples it is concluded that the flow of oxygen is described by the Darcy equation, but the flow of water vapour is not. The different mechanisms of transmission cause the transmission rates for oxygen to be spread over a far greater range than those for water vapour with some of the SF samples almost impermeable to oxygen. (C) 1999 Published by Elsevier Science Ltd. Air rights reserved.

引用

页码：405 / 414

页数：10

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