Design of strain hardening cement-based composites with alkali treated natural curaua fiber

被引：49
|
作者：
Zukowski, Bartosz [1 ]
Silva, Flavio de Andrade [2 ]
Toledo Filho, Romildo Dias [1 ]
机构：
[1] Univ Fed Rio de Janeiro, Dept Civil Engn, COPPE, POB 68506, BR-21941972 Rio De Janeiro, RJ, Brazil
[2] Pontificia Univ Catolica Rio de Janeiro PUC Rio, Dept Civil Engn, Rua Marques de Sao Vicente 225, BR-22953900 Rio De Janeiro, RJ, Brazil
来源：
CEMENT & CONCRETE COMPOSITES | 2018年 / 89卷
关键词：
Strain hardening cement-based composite; Natural fiber; Curaua; Fiber alkaline treatment; MULTIPLE CRACKING; TENSILE BEHAVIOR; MATRIX BOND; PERFORMANCE; DUCTILITY; STRENGTH; SISAL; JUTE;
D O I：
10.1016/j.cemconcomp.2018.03.006
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The work in hand presents the design process of Strain Hardening Cement-based Composite reinforced with natural curaua fiber. The matrix fracture energy and matrix-fiber bond were studied and implemented into the theoretical model for critical fiber volume prediction, which was verified by mechanical tests for tensile, bending and compression strength. The influence of matrix-fiber bond on critical fiber volume is presented. The fiber properties are improved by two-stage treatment. Firstly, hot water (80 degrees C) washing in water changed every 3 h. Secondly, immersion in 1% solution of calcium hydroxide Ca(OH)(2) with water for 60 min for calcium deposition on fiber surface to increase bond properties. The critical fiber volume predicted by the model was 4% for 20mm treated curaua fiber and was verified on the composites, which presented strain-hardening behavior under tensile test and deflection-hardening under bending. (C) 2018 Elsevier Ltd. All rights reserved.
引用
收藏
页码：150 / 159
页数：10
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