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原文传递 DEVELOPMENT OF TRANSIENT PERMEABILITY THEORY AND APPARATUS FOR MEASUREMENTS OF CEMENTITIOUS MATERIALS.

题名：	DEVELOPMENT OF TRANSIENT PERMEABILITY THEORY AND APPARATUS FOR MEASUREMENTS OF CEMENTITIOUS MATERIALS.
作者：	Roy-DM; Scheetz-BE; Pommersheim-J; Licasttro-PH
关键词：	PERMEABILITY-; CEMENTS-; MEASURING-INSTRUMENTS; MEASURING-; PRESSURE-
摘要：	A permeabiliity apparatus has been developed that allows a rapid and accurate measurement of water transport concrete. The principle of the apparatus consists in subjecting a test specimen to a small pressure differential and monitor both the pressure decay and the pressure rise resulting in response to the pressure pulse. Very rapid measurements are possible with this apparatus for specimens possessing permeabilities on the order of microdarcy to nanodarcy. However, below a nanodarcy, the problems of establishing pressure equilibirium throughout the test specimen becomes more difficult. To explain the behavior of cementitious materials subjected to pressure, mathematical relationhsips were developed building upon the work in the existing literature on fluid flow in porous media subjected to a transient pressure pulse.
总页数：	1993/04. pp30 (Figs., 1 Tab., Refs., 2 App.)
报告类型：	科技报告