Laboratory characterization of soft clay mixed with EPS, lime, fly ash, and sodium silicate

IF 3.7 2区工程技术 Q3 ENGINEERING, ENVIRONMENTAL

Bulletin of Engineering Geology and the Environment Pub Date : 2023-07-11 DOI:10.1007/s10064-023-03297-y

Ping Jiang, Wenqian Zheng, Lin Zhou, Na Li, Wei Wang

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引用次数: 0

Abstract

The influence of expanded polystyrene foam (EPS) and sodium silicate content on the density and mechanical properties of soft clay mixed with EPS, lime, fly ash, and sodium silicate is investigated in this study using unconfined compressive strength (UCS), cyclic load (CL), and scanning electron microscope (SEM) tests. It was found that EPS can efficiently decrease the density of mixed soil, whereas sodium silicate has no influence on the density. The UCS, elastic modulus, resilient modulus, and maximum dynamic stress first increased and then decreased with increasing sodium silicate content and decreased with increasing EPS content. When the sodium silicate and EPS contents were 6% and in the range 0.5 to 1%, respectively, the density of the mixed soil could be reduced efficiently, and the mechanical properties could be maintained. Based on this, an EPS content of 0.5 to 1% and a sodium silicate content of 6% can be considered optimal. Subsequently, an empirical model between the UCS, EPS content, and silicate content is proposed, which can provide theoretical support for mixed soil engineering applications.

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EPS、石灰、粉煤灰和水玻璃混合软粘土的实验室表征

通过无侧限抗压强度(UCS)、循环荷载(CL)和扫描电镜(SEM)试验，研究了膨胀聚苯乙烯泡沫塑料(EPS)和水玻璃含量对EPS、石灰、粉煤灰和水玻璃混合软粘土密度和力学性能的影响。结果表明，EPS能有效降低混合土的密度，而硅酸钠对混合土的密度没有影响。弹性模量、弹性模量和最大动应力随硅酸钠含量的增加先增大后减小，随EPS含量的增加而减小。当水玻璃和EPS含量分别为6%和0.5 ~ 1%时，可有效降低混合土的密度，保持混合土的力学性能。在此基础上，EPS含量为0.5 ~ 1%，水玻璃含量为6%可以认为是最佳的。在此基础上，建立了UCS、EPS含量与硅酸盐含量之间的经验模型，为混合土工程应用提供理论支持。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Bulletin of Engineering Geology and the Environment 工程技术-地球科学综合

CiteScore

7.10

自引率

11.90%

发文量

445

审稿时长

4.1 months

期刊介绍： Engineering geology is defined in the statutes of the IAEG as the science devoted to the investigation, study and solution of engineering and environmental problems which may arise as the result of the interaction between geology and the works or activities of man, as well as of the prediction of and development of measures for the prevention or remediation of geological hazards. Engineering geology embraces: • the applications/implications of the geomorphology, structural geology, and hydrogeological conditions of geological formations; • the characterisation of the mineralogical, physico-geomechanical, chemical and hydraulic properties of all earth materials involved in construction, resource recovery and environmental change; • the assessment of the mechanical and hydrological behaviour of soil and rock masses; • the prediction of changes to the above properties with time; • the determination of the parameters to be considered in the stability analysis of engineering works and earth masses.