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Swell-compression characteristics of a fiber-reinforced expansive soil

机译：纤维增强膨胀土的膨胀压缩特性

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摘要

This study presents results of an experimental program with respect to fiber's capacity of mitigating the swelling behavior of an expansive soil. Two types of tape shaped fibers, i.e. fiber A (width f(w) = 2.5 mm) and fiber B (f(w) = 7 nun), were used as the reinforcements. The fibers were included at three contents, i.e. f(c) = 0.5%, 1% and 1.5%, each having two lengths or aspect ratios (f(AR) = 15/2.5 and 30/2.5 for fiber A, and f(AR) = 15/7 and 30/7 for fiber B). For a given fiber type (constant f(w)), improvement in swelling potential/pressure was observed to be a direct function of f(c) and f(l) (fiber length) or f(AR), with the former taking on a more pronounced role. In addition, for a given f(c) and f(l) the wider fiber (lower f(AR)) was more efficient in restricting swelling. The compression characteristics were cross checked with the swelling properties to arrive the optimum stabilization scenarios. For both fiber types, f(c) = 0.5% suggested an optimal case. However, where compressional deformations are not a primary concern, higher inclusions up to 1% could also be an acceptable choice.
机译：这项研究提出了关于纤维减轻膨胀土膨胀特性的实验程序的结果。两种类型的带状纤维，即纤维A（宽度f（w）= 2.5毫米）和纤维B（f（w）= 7尼姑）用作增强材料。纤维的含量为三种含量，即f（c）= 0.5％，1％和1.5％，每种含量都有两种长度或纵横比（纤维A的f（AR）= 15 / 2.5和30 / 2.5，f（对于光纤B），AR）= 15/7和30/7。对于给定的纤维类型（常数f（w）），观察到溶胀势/压力的改善是f（c）和f（l）（纤维长度）或f（AR）的直接函数，前者为扮演更明显的角色另外，对于给定的f（c）和f（l），较宽的纤维（较低的f（AR））在限制膨胀方面更有效。将压缩特性与膨胀特性进行交叉检查，以得出最佳的稳定方案。对于两种光纤类型，f（c）= 0.5％均表明是最佳情况。但是，在压缩变形不是主要问题的情况下，较高的夹杂物含量最高为1％也可以接受。

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