Experimental investigations on bond strength between coconut fibre and concrete

被引：101
|
作者：
Ali, Majid [1 ]
Li, Xiaoyang [1 ]
Chouw, Nawawi [1 ]
机构：
[1] Univ Auckland, Auckland Mail Ctr, Dept Civil & Environm Engn, Auckland 1142, New Zealand
来源：
MATERIALS & DESIGN | 2013年 / 44卷
关键词：
Coconut fibre; Composite material; Bond strength; Fibre pretreatment and pull-out test; REINFORCED CONCRETE; MORTAR COMPOSITES; DURABILITY;
D O I：
10.1016/j.matdes.2012.08.038
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Effect of fibre embedment lengths, diameters, pretreatment conditions and concrete mix design ratios on the bond strength between single coconut fibre and concrete is investigated. Fibres are prepared and categorised manually. Fibre diameters are measured by a stereomicroscope. Fibre and concrete properties are also determined experimentally. The simplified equations are proposed for estimating the fibre tensile stress, elastic modulus and toughness. Single fibre pull-out tests are carried out to determine load-slippage curves with the help of an Instron tensile machine having load cell. Bond strength and energy required for fibre pullout are calculated from the experimental data. The results show that fibres have the maximum bond strength with concrete when (i) embedment length is 30 mm, (ii) fibres are thick, (iii) treated with boiling water, and (iv) concrete mix design ratio is 1:3:3. Similar effects are observed for energy required for fibre pullout. With the obtained knowledge, empirical equations are also developed to determine the bond strength and energy required for fibre pullout. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：596 / 605
页数：10
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