丁二烯共聚物和改性苯乙烯的加入对砂力学性能的影响

IF 1.1 Q4 ENGINEERING, GEOLOGICAL

Soils and Rocks Pub Date : 2022-05-03 DOI:10.28927/sr.2022.074521

Thiago Barreto, L. Repsold, N. G. Souza e Silva, M. Casagrande

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引用次数: 3

摘要

丁二烯-苯乙烯共聚物（SBR）是一种由75%的丁二烯和25%的苯乙烯组成的弹性体，广泛用于汽车行业的轮胎生产。这种弹性体可以通过两种聚合工艺生产：乳液聚合或溶液聚合。本文介绍了聚合物增强砂与纯砂相比的力学性能。在纯砂试样上加入改性苯乙烯-丁二烯-苯乙烯共聚物（XSBR）进行了直接剪切试验。聚合物砂试样的含水量为10%，相对密度为50%，水-聚合物质量比为1:1、1:2和1:4，没有固化时间，或固化时间为48、72、96、576和720h。与纯砂参数相比，添加聚合物后的砂试样的强度参数得到了改善，表明聚合物改良土壤在岩土工程中的应用是令人满意的，例如：软土路堤、浅基础土壤和边坡稳定性。

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Influence of addition of butadiene copolymer and modified styrene on the mechanical behavior of a sand

Butadiene-styrene copolymer (SBR) is an elastomer composed of 75% butadiene and 25% styrene and is widely used in the automotive industry in tire production. This elastomer can be produced from two polymerization processes: emulsion or solution polymerization. This paper presents the mechanical behavior of a polymer reinforced sand compared to pure sand. Direct shear tests were performed on pure sand specimens and with the addition of modified styrene butadiene-styrene copolymer (XSBR). The polymeric sand specimens had 10% moisture content, 50% relative density, with water-polymer mass ratios of 1:1, 1:2, and 1:4, with no curing time, or with curing times 48, 72, 96, 576, and 720 h. Improvements were verified in the strength parameters of sand specimens with polymer addition, while comparing with pure sand parameters, showing that the improvement of soils with polymers is satisfactory for application in geotechnical works, such as: embankments in soft soils, soils for shallow foundations and for slope stability.

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来源期刊

Soils and Rocks ENGINEERING, GEOLOGICAL-

CiteScore

1.00

自引率

20.00%

发文量

期刊介绍： Soils and Rocks publishes papers in English in the broad fields of Geotechnical Engineering, Engineering Geology and Environmental Engineering. The Journal is published in April, August and December. The journal, with the name "Solos e Rochas", was first published in 1978 by the Graduate School of Engineering-Federal University of Rio de Janeiro (COPPE-UFRJ).