非织造土工布抗机械损伤和磨损的性能

Mónica Dias , José Ricardo Carneiro , Maria de Lurdes Lopes
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引用次数: 16

摘要

安装过程(会引起机械损伤)和磨损会对土工布的性能造成不必要的变化。在这项工作中,对一种非织造聚丙烯土工布进行了三种降解试验:(1)机械损伤,(2)磨损和(3)机械损伤后的磨损(连续暴露)。通过拉伸试验、撕裂试验和静态穿刺试验对退化试验造成的损伤进行了评价。根据力学性能的变化,确定了折减系数。结果表明,降解试验导致土工布的机械强度相应降低(连续暴露于两种降解试验中降低幅度更大)。连续暴露于两种降解试验中获得的机械损伤和磨损综合影响的折减系数与传统方法(分别确定每次降解试验的折减系数并进一步相乘)获得的折减系数不同(略高)。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Resistance of a nonwoven geotextile against mechanical damage and abrasion

The installation procedures (which induce mechanical damage) and abrasion can cause unwanted changes on the properties of the geotextiles. In this work, a nonwoven polypropylene geotextile was subjected to three degradation tests: (1) mechanical damage, (2) abrasion and (3) mechanical damage followed by abrasion (successive exposure). The damage caused by the degradation tests was evaluated by tensile, tearing and static puncture tests. Based on the changes occurred in the mechanical properties, reduction factors were determined. Results showed that the degradation tests provoked relevant reductions in the mechanical strength of the geotextile (higher reductions in the successive exposure to both degradation tests). The reduction factors for the combined effect of mechanical damage and abrasion obtained in the successive exposure to both degradation tests were different (slightly higher) than those obtained by the traditional methodology (determination of reduction factors separately for each degradation test and further multiplication).

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