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Polymers 2018, 10(3), 287; https://doi.org/10.3390/polym10030287

Evaluation of Strength Properties of Sand Modified with Organic Polymers

1
School of Earth Sciences and Engineering, Hohai University, Nanjing 210098, China
2
Key Laboratory of Earth Fissures Geological Disaster, Ministry of Land and Resource (Geological Survey of Jiangsu Province), Nanjing 210049, China
3
Council of Scientific and Industrial Research (CSIR)—Central Building Research Institute (CBRI), Roorkee 247667, India
*
Author to whom correspondence should be addressed.
Received: 27 January 2018 / Revised: 1 March 2018 / Accepted: 6 March 2018 / Published: 8 March 2018
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Abstract

Due to weak physical properties of sand, chemical reinforcement methods are widely used to improve sand properties to meet the engineering requirements. However, most of the traditional additives cause environmental problems. Therefore, non-traditional additives such as liquid polymers, enzymes, ions, and lignin derivatives have been studied extensively. In this study, organic polymer is used as a soil stabilizer to reinforce the sand. To evaluate the effectiveness of the organic polymer as soil stabilizer, a series of unconfined compression strength (UCS) tests, direct shear tests, and tensile tests were carried out on reinforced sand with different polymer concentrations and dry densities of sand. The reinforcement mechanism was analysed with scanning electron microscopy (SEM) images. The results indicated that the polymer concentration and dry density of sand had significant effects on the strength characteristics of reinforced sand specimens. The unconfined compressive strength, cohesion, and tensile strength of specimens with the same dry density increased with the increasing polymer concentration. The polymer membranes—formed by the mixture of polymer and water—enwrap the sand particles and interlink them to form a stable structure. The efficiency of this stabilization changed with dry sand density. View Full-Text
Keywords: organic polymers; sand; strength behaviour; laboratory test organic polymers; sand; strength behaviour; laboratory test
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Liu, J.; Bai, Y.; Song, Z.; Lu, Y.; Qian, W.; Kanungo, D.P. Evaluation of Strength Properties of Sand Modified with Organic Polymers. Polymers 2018, 10, 287.

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