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首页> 外文期刊>Earth Surface Processes and Landforms: The journal of the British Geomorphological Research Group >Variable weathering response in sandstone: factors controlling decay sequences
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Variable weathering response in sandstone: factors controlling decay sequences

机译：砂岩中不同的风化响应：控制衰减序列的因素

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摘要

Differences in weathering response characteristics of fine- and coarse-grained Stanton Moor sandstone samples were assessed in a laboratory weathering simulation experiment using I 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 (c) 2005 John Wiley & Sons, Ltd.
机译：在实验室风化模拟实验中，使用盐风化和冻融循环的可变组合，评估了细粒和粗粒Stanton Moor砂岩样品的风化响应特性差异。渗透性特征的初步分析确定了每种类型的Stanton砂岩的均值相似，但两个样品组之间的数值范围存在显着差异，与细粒相比，Stanton Moor砂岩的粗粒样品显示出有限的数值范围样本显示出更大的块内差异。数据表明，初始渗透率值的范围越大，盐和水分进入和保留并因此最终破坏石材结构的可能性就越大。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重大的结构变化。有证据表明，相同类型石头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率和分解模式。版权所有（c）2005 John Wiley＆Sons，Ltd.

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