Capillary absorption in concrete and the Lucas-Washbum equation

被引：105

作者：

Hanzic, Lucija ^{[1
]}

Kosec, Ladislav ^{[2
]}

Anzel, Ivan ^{[3
]}

机构：

[1] Univ Maribor, Fac Civil Engn, SLO-2000 Maribor, Slovenia

[2] Univ Ljubljana, Fac Nat Sci & Engn, Ljubljana 1000, Slovenia

[3] Univ Maribor, Fac Mech Engn, SLO-2000 Maribor, Slovenia

来源：

CEMENT & CONCRETE COMPOSITES | 2010年 / 32卷 / 01期

关键词：

Capillary absorption; Lucas-Washburn equation; Concrete; Neutron Radiography; CEMENT-BASED MATERIALS; NEUTRON-RADIOGRAPHY; MERCURY POROSIMETRY; TRANSPORT;

D O I：

10.1016/j.cemconcomp.2009.10.005

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Capillary absorption kinetics of concrete-ethylene glycol system was studied with respect to concrete matrix porosity and liquid viscosity. Porosity of specimens was altered by air-entraining agents and superplasticizers. Liquid which doesn't react with cement gel was chosen for the experiment in order to study the reasons for deviation from Lucas-Washburn equation observed in concrete-water system. Viscosity of ethylene glycol changes from similar to 23 to 2 mPa s in the temperature range from 20 to 100 degrees C. The values of the capillary coefficient were determined at 20, 60 and 100 degrees C using Neutron Radiography and were found to be in the range from similar to 1.5 to 4.9 MM h(-1/2). The results show that the Lucas-Washburn equation in concrete-ethylene glycol system is valid only for similar to 25 h, which indicates that swelling and rehydration of cement gel are not the main reasons for deviation observed in concrete-water system. (C) 2009 Elsevier Ltd. All rights reserved

引用

页码：84 / 91

页数：8

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