Moisture ingress in rammed earth: Part 1 - the effect of soil particle-size distribution on the rate of capillary suction

被引:64
作者
Hall, M [1 ]
Djerbib, Y [1 ]
机构
[1] Sheffield Hallam Univ, Ctr Built Environm, Sheffield S1 1WB, S Yorkshire, England
关键词
rammed earth; moisture ingress; capillary suction;
D O I
10.1016/j.conbuildmat.2003.11.002
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
The novel initial rate of suction (IRS) 'wick' test has been presented, and is suitable for determining the rate of capillary moisture ingress in unstabilised rammed earth that slakes on contact with water. Experimental testing was performed using the 'wick' test to investigate the effect of soil particle-size distribution on moisture ingress in rammed earth. Rammed earth generally absorbs much less water due to capillary suction, and at a slower rate, than conventional masonry building materials such as bricks and concrete. Moisture ingress in rammed earth, due to capillary suction, increases linearly per unit inflow surface area against the square root of elapsed time (roott). The particle-size distribution of the soil is critical in determining the rate at which moisture may ingress. In a suitable soil, the ratio between the total specific surface area (SSA) of the aggregate fraction and the mass of the binder fraction appears to be positively linked with the rate of capillary suction in rammed earth. Experimental data have been included. (C) 2003 Elsevier Ltd. All rights reserved.
引用
收藏
页码:269 / 280
页数:12
相关论文
共 18 条
[1]  
*BRE, 1983, SEL NAT BUILD STON, P1
[2]  
*BSI, 1990, 13772 BS BSI 2
[3]  
BSI (British Standards Institution), 1985, 3921 BS BSI
[4]  
CAMUFFO D, 1995, PHYS WEATHERING STON, P1
[5]   Moisture migration in building walls - Analysis of the interface phenomena [J].
DeFreitas, VP ;
Abrantes, V ;
Crausse, P .
BUILDING AND ENVIRONMENT, 1996, 31 (02) :99-108
[6]  
Dobson Silvia, COMMUNICATION
[7]   WATER-MOVEMENT IN POROUS BUILDING-MATERIALS .7. THE SORPTIVITY OF MORTARS [J].
HALL, C ;
TSE, TKM .
BUILDING AND ENVIRONMENT, 1986, 21 (02) :113-118
[9]   WATER-MOVEMENT IN POROUS BUILDING-MATERIALS .1. UNSATURATED FLOW THEORY AND ITS APPLICATIONS [J].
HALL, C .
BUILDING AND ENVIRONMENT, 1977, 12 (02) :117-125
[10]   Rammed earth sample production: context, recommendations and consistency [J].
Hall, M ;
Djerbib, Y .
CONSTRUCTION AND BUILDING MATERIALS, 2004, 18 (04) :281-286