Quasi-static and dynamic mechanical elastic moduli of alkaline aged pultruded fibre reinforced polymer composite rebar

被引:11
作者
Sawpan, Moyeenuddin Ahmad [1 ]
Mamun, Abdullah A. [2 ]
Holdsworth, Peter G. [1 ]
Renshaw, Peter [1 ]
机构
[1] Pultron Composites Ltd, Composite Mat Res, Gisborne, New Zealand
[2] Univ Kassel, Inst Mat Engn, Kassel, Germany
来源
MATERIALS & DESIGN | 2013年 / 46卷
关键词
Alkaline ageing; Dynamic mechanical modulus; Glass fibre reinforced polymer composite; Pultrusion; Quasi-static modulus; CONCRETE STRUCTURES; DURABILITY; BARS; TEMPERATURE; STRENGTH; BOND;
D O I
10.1016/j.matdes.2012.10.038
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Due to the increased use of glass fibre reinforced polymer composite (GFRP) rebar in concrete structures, the durability performance of GFRP rebar has been an important research topic in recent years. This paper presents elastic modulus of alkaline environment (pH approximate to 13) aged pultruded GFRP rebar as evaluated by three different methods, namely, quasi-static tensile, quasi-static flexural and dynamic mechanical thermal tests. It was found that elastic modulus of the GFRP rebar samples did not change significantly due to exposure in alkaline environment at 60 degrees C for 1, 2, 3, 4, 6 and 14 months when compared with that of control sample. Elastic modulus was found to be in the range of 52.5-56.5 GPa irrespective to testing methods and ageing time. In addition, it was estimated from the long time projected results that quasi-static tensile, quasi-static flexural and dynamic mechanical moduli will be retained by about 93%, 95% and 85%, respectively, after 100 years in alkaline environment at 60 degrees C. Microscopic analysis indicated that quasi-static tensile and flexural failure was mainly due to matrix cracking and shear failure of fibre/matrix interface. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码:277 / 284
页数:8
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