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Evaluation of Strength Properties of Sand Modified with Organic Polymers

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, ion...

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Detalles Bibliográficos
Autores principales: Liu, Jin, Bai, Yuxia, Song, Zezhuo, Lu, Yi, Qian, Wei, Kanungo, Debi Prasanna
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6414931/
https://www.ncbi.nlm.nih.gov/pubmed/30966322
http://dx.doi.org/10.3390/polym10030287
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author Liu, Jin
Bai, Yuxia
Song, Zezhuo
Lu, Yi
Qian, Wei
Kanungo, Debi Prasanna
author_facet Liu, Jin
Bai, Yuxia
Song, Zezhuo
Lu, Yi
Qian, Wei
Kanungo, Debi Prasanna
author_sort Liu, Jin
collection PubMed
description 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.
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spelling pubmed-64149312019-04-02 Evaluation of Strength Properties of Sand Modified with Organic Polymers Liu, Jin Bai, Yuxia Song, Zezhuo Lu, Yi Qian, Wei Kanungo, Debi Prasanna Polymers (Basel) Article 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. MDPI 2018-03-08 /pmc/articles/PMC6414931/ /pubmed/30966322 http://dx.doi.org/10.3390/polym10030287 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Liu, Jin
Bai, Yuxia
Song, Zezhuo
Lu, Yi
Qian, Wei
Kanungo, Debi Prasanna
Evaluation of Strength Properties of Sand Modified with Organic Polymers
title Evaluation of Strength Properties of Sand Modified with Organic Polymers
title_full Evaluation of Strength Properties of Sand Modified with Organic Polymers
title_fullStr Evaluation of Strength Properties of Sand Modified with Organic Polymers
title_full_unstemmed Evaluation of Strength Properties of Sand Modified with Organic Polymers
title_short Evaluation of Strength Properties of Sand Modified with Organic Polymers
title_sort evaluation of strength properties of sand modified with organic polymers
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6414931/
https://www.ncbi.nlm.nih.gov/pubmed/30966322
http://dx.doi.org/10.3390/polym10030287
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