Experimental Study on Mechanical Behavior of Sand Improved by Polyurethane Foam

IF 1.5 4区工程技术 Q3 ENGINEERING, MECHANICAL

Experimental Techniques Pub Date : 2023-02-14 DOI:10.1007/s40799-023-00633-5

M. Ghasemi, M. Bayat, M. Ghasemi

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引用次数: 1

Abstract

So far, many studies have been completed on the traditional soil stabilisation using cement or lime, however, very limited literatures pay attention to the mechanical behavior of stabilised soil with new materials. The main objective of the current study was to investigate the mechanical behavior of stabilised soil with polyurethane (PU) foam. For this purpose, a series of direct shear tests were performed on soil specimens which were stabilised by PU foam. The study revealed that adding PU foam to sand resulted in a remarkable increase in the shear strength parameters (c and ϕ), which the increase of cohesion was more pronounced than the increase of angle of internal friction. The strength of PU foam-stabilised specimens increased gradually as the PU foam content increased from 0 to 10% and then decreased for additional PU foam content. The interaction between the sand particles and PU foam was investigated by optical micrograph analysis. Finally, a new model was developed to predict the shear strength of PU foam-stabilised specimens. Results indicated a satisfactory performance of the proposed model where the Pearson correlation coefficient was 0.94.

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聚氨酯泡沫改性砂力学性能试验研究

到目前为止，对传统的水泥或石灰稳定土的研究已经完成了很多，但对新材料稳定土的力学行为的关注却非常有限。本研究的主要目的是研究聚氨酯(PU)泡沫稳定土的力学行为。为此，在PU泡沫稳定土样上进行了一系列的直剪试验。研究表明，在砂土中加入PU泡沫塑料后，其抗剪强度参数(c和φ)显著增加，其中粘聚力的增加比内摩擦角的增加更为明显。PU泡沫稳定试样的强度随PU泡沫含量从0 ~ 10%的增加而逐渐增大，随PU泡沫含量的增加而减小。采用光学显微分析方法研究了砂粒与聚氨酯泡沫的相互作用。最后，建立了预测PU泡沫稳定试件抗剪强度的新模型。结果表明，该模型具有令人满意的性能，Pearson相关系数为0.94。

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来源期刊

Experimental Techniques 工程技术-材料科学：表征与测试

CiteScore

3.50

自引率

6.20%

发文量

审稿时长

5.2 months

期刊介绍： Experimental Techniques is a bimonthly interdisciplinary publication of the Society for Experimental Mechanics focusing on the development, application and tutorial of experimental mechanics techniques. The purpose for Experimental Techniques is to promote pedagogical, technical and practical advancements in experimental mechanics while supporting the Society''s mission and commitment to interdisciplinary application, research and development, education, and active promotion of experimental methods to: - Increase the knowledge of physical phenomena - Further the understanding of the behavior of materials, structures, and systems - Provide the necessary physical observations necessary to improve and assess new analytical and computational approaches.