《Journal of Geotechnical and Geoenvironmental Engineering》杂志刊登“地毯垃圾纤维加筋粘土的无侧限抗压强度”

作者：M. Mirzababaei; M. Miraftab; M. Mohamed; P. McMahon

刊物：《Journal of Geotechnical and Geoenvironmental Engineering》，2013年3月，139卷第3期，483–493页

关键词：粘土；垃圾；地毯；纤维；无侧限抗压强度

摘要：本文介绍了地毯垃圾纤维在加筋粘土中的应用研究方面的成果。评估了在粘土中添加适量的两种不同类型的破碎地毯垃圾纤维的影响（比如土干密度的1，3和5%）。研究采用了最优含水率下最大干容重的试样，以及干容重和含水率变化的试样。并且对纤维含量相同，含水量保持不变仅改变干容重，或者对同时改变干容重和含水量的试样进行了比较。研究表明，在干密度相同的情况下，含低碳垃圾纤维能够明显提高无侧限抗压强度(UCS)，降低后峰强度损失，并且破坏方式由脆性破坏变为韧性破坏。结果还表明，纤维提高粘土的无侧限抗压强度的相对效果取决于土的初始干容重和含水量。无加筋土试样的破坏方式为明显的经典破坏，而含有5%纤维含量的加筋土试样的破坏方式则逐渐变为酒桶状破坏。

Unconfined Compression Strength of Reinforced Clays with Carpet Waste Fibers

Authors: M. Mirzababaei; M. Miraftab; M. Mohamed; P. McMahon

Journal: Journal of Geotechnical and Geoenvironmental Engineering, Volume 139, Issue 3 (March 2013), 483–493

Key words: Clay, Waste, Carpet, Fiber, Unconfined compression strength

Abstract: This paper presents results of a comprehensive investigation on the utilization of carpet waste fibers in reinforcement of clay soils. Effects of adding proportionate quantities of two different types of shredded carpet waste fibers to clay soils (i.e., 1, 3, and 5% by dry weight of the soil) were investigated and evaluated. The investigation was conducted on specimens prepared at their maximum dry unit weight and optimum moisture content, as well on specimens prepared at variable conditions of dry unit weight and moisture content. A comparison was also made on specimens prepared at the same fiber content by changing dry unit weight while moisture content was kept unchanged or by changing both dry unit weight and moisture content. The investigation revealed that inclusion of carpet waste fibers into clay soils prepared at the same dry unit weight can significantly enhance the unconfined compression strength (UCS), reduce postpeak strength loss, and change the failure behavior from brittle to ductile. The results also showed that the relative benefit of fibers to increase the UCS of the clay soils is highly dependent on initial dry unit weight and moisture content of the soil. Failure patterns were gradually transformed from the apparent classical failure for unreinforced soil specimens to barrel-shaped failures for reinforced specimens at 5% fiber content.

原文链接：http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29GT.1943-5606.0000792