Variable weathering response in sandstone: factors controlling decay sequences
Variable weathering response in sandstone: factors controlling decay sequences
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DOI：
10.1002/esp.1284
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发表时间：
2006-05
影响因子：
3.3
通讯作者：
P. Warke;J. Mckinley;B. Smith
中科院分区：
文献类型：
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作者：
P. Warke;J. Mckinley;B. Smith
使用盐风化和冻融循环的可变组合，在实验室风化模拟实验中评估了细粒和粗粒斯坦顿摩尔砂岩样品的风化响应特征差异。对渗透率特征的初步分析发现，每种类型的斯坦顿砂岩的平均值相似，但两个样品组之间的值范围存在显着差异，斯坦顿沼泽砂岩的粗粒样品显示出有限的值范围，而细粒样品则显示出更大的块内变化。数据表明，初始渗透率值的范围越大，盐和湿气进入和滞留的可能性就越大，从而最终破坏石材的结构。实验数据还确定了衰变序列的不同阶段，在材料分解和损失变得明显之前的初始准备阶段发生了显着的结构变化。有证据表明，同一类型石材样品之间相对较小的结构和矿物学差异可能会对风化行为产生重大影响，从而导致不同的分解速度和模式。版权所有 © 2005 约翰·威利父子有限公司
Differences in weathering response characteristics of fine‐ and coarse‐grained Stanton Moor sandstone samples were assessed in a laboratory weathering simulation experiment using a variable combination of salt weathering and freeze/thaw cycles. Preliminary analysis of permeability characteristics identified similar mean values for each type of Stanton sandstone but significant differences in the range of values between the two sample sets, with coarse‐grained samples of Stanton Moor sandstone displaying a restricted range of values in comparison to fine‐grained samples which showed much greater within‐block variation. Data indicated that the greater the range in initial permeability values, the greater the potential for salt and moisture ingress and retention and hence eventual disruption of the fabric of the stone. Experimental data also identified different stages in decay sequences, with significant structural change occurring during the initial preparatory stage before material breakdown and loss became apparent. Evidence suggests that relatively minor structural and mineralogical differences between samples of the same stone type can have a significant influence on weathering behaviour, resulting in distinct rates and patterns of breakdown. Copyright © 2005 John Wiley & Sons, Ltd.