Mechanically pulped sisal as reinforcement in cementitious matrices

被引：84
|
作者：
Savastano, H
Warden, PG
Coutts, RSP
机构：
[1] Univ Sao Paulo, BR-13635900 Pirassununga, SP, Brazil
[2] CSIRO Forestry & Forest Prod, Clayton, Vic 3169, Australia
[3] ASSEDO Pty Ltd, Sandringham, Vic 3191, Australia
来源：
CEMENT & CONCRETE COMPOSITES | 2003年 / 25卷 / 03期
关键词：
alternative fibre-cements; vegetable fibres; clinker-free cement; microscopy;
D O I：
10.1016/S0958-9465(02)00055-0
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The performance as reinforcement of fibres obtained from commercial and by-product sisal (Agave sisalana) by thermomechanical pulping and chemi-thermomechanical pulping (CTMP) processes was investigated. Ordinary Portland cement (OPC) and chemically activated blast furnace slag (BFS) were examined as binders. The flexural strengths of OPC- and BFS-based composites incorporating 8% fibre reinforcement by mass were similar at 28 days and ranged from 18 to 22 MPa. Corresponding modulus of elasticity values were in the region of 11 GPa for the OPC-based composites and 7 GPa for the BFS-based composites. Water absorption values at 8% fibre content lay in the range of 21-31% by mass and density values in the region of 1.5 g/cm(3). Fracture toughness increased with fibre content, reaching a value of 1.6 kJ/m(2) at a content of 12% in the case of by-product sisal CTMP in the BFS matrix. Scanning electron microscopy provided interfacial bonding information that can be related to the mechanical performance of these fibre-reinforced pastes. (C) 2002 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：311 / 319
页数：9
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