Analysis of the hygrothermal functional properties of stabilised rammed earth materials
Analysis of the hygrothermal functional properties of stabilised rammed earth materials
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DOI：
10.1016/j.buildenv.2009.01.007
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发表时间：
2009-09-01
影响因子：
7.4
通讯作者：
Allinson, David
中科院分区：
文献类型：
--
作者：
Hall, Matthew;Allinson, David
合适的实验方法来确定湿热性能的稳定的夯实土（SRE）材料已被提交沿着与比较实验数据为三种不同的SRE配合比设计与参数分析这些变量对材料功能的影响。较高的体积孔隙率对应于降低的体积热容（C），但增加的吸附性（S）和蒸汽渗透性（W）。由于体积孔隙率和空隙尺寸分布（VSD）是相互依赖的变量，因此对于恒定的颗粒尺寸分布（PSD）和压实能量，孔隙率的增加导致材料的平均孔隙半径（r）相对于bar的增加。这解释了为什么液体/蒸气传递（S和W）项的大小与吸湿水分容量xi成反比，因为当平均孔径减小时，毛细管势Psi将增加。的影响是，尺寸材料的湿热性能可以设计和预测通过操纵颗粒尺寸分布和压实能量。(C)2009爱思唯尔有限公司版权所有。
Suitable experimental methodologies for determining the hygrothermal properties of stabilised rammed earth (SRE) materials have been presented along with comparative experimental data for three different SRE mix designs with parametric analysis of the influence of these variables on material function. Higher bulk porosity corresponds to reduced volumetric heat capacity (C), but increased sorptivity (S) and vapour permeance (W). Since bulk porosity and void size distribution (VSD) are interdependent variables, it follows that for constant particle size distribution (PSD) and compaction energy an increase in porosity results in an increase in the mean pore radius, (r) over bar for a material. This explains why the magnitude of liquid/vapour transfer (S and W) terms are inversely related to the hygroscopic moisture capacity, xi since the capillary potential, Psi will increase when the mean pore diameter decreases. The implications are that the hygrothermal properties of SIZE materials can be designed and predicted by manipulating particle size distribution and compaction energy. (C) 2009 Elsevier Ltd. All rights reserved.