The potential use of chitosan as a biopolymer additive for enhanced mechanical properties and water resistance of earthen construction

被引：94

作者：

Aguilar, Rafael ^{[1
]}

Nakamatsu, Javier ^{[2
]}

Ramirez, Eduardo ^{[1
]}

Elgegren, Mariela ^{[2
]}

Ayarza, Jorge ^{[2
]}

Kim, Suyeon ^{[3
]}

Pando, Miguel A. ^{[4
]}

Ortega-San-Martin, Luis ^{[2
]}

机构：

[1] PUCP, Civil Engn Div, Dept Engn, Av Univ 1801, Lima 32, Peru

[2] PUCP, Div Chem, Dept Sci, Av Univ 1801, Lima 32, Peru

[3] PUCP, Dept Engn, Av Univ 1801, Lima 32, Peru

[4] Univ N Carolina, Dept Civil & Environm Engn, 9201 Univ City Blvd, Charlotte, NC 28223 USA

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2016年 / 114卷

关键词：

Material modification; Earthen construction; Chitosan biopolymer; Water induced degradation; Mechanical strength; SURFACE MODIFICATION; ADOBE BRICKS; MICROSTRUCTURE; FIBERS;

D O I：

10.1016/j.conbuildmat.2016.03.218

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The study investigates the feasibility of using chitosan biopolymer as an admixture, or as an external coating, for earthen constructions to improve their resistance in two components: water induced degradation and key mechanical properties. The resistance to water induced degradation was evaluated in terms of contact angle and drip erosion tests, while the influence on mechanical properties was measured through compressive, tensile and three-point bending tests. The results indicate that the use of low concentrations of chitosan can improve significantly the performance in the two components and therefore was found to be a promising treatment for new or existing construction. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：625 / 637

页数：13

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