Improvement of the FRP Sheet Bonded to Concrete Substrate by Silane Coupling Agent

We experimentally studied the fine lightweight aggregate with the particle size range of 3.15-4.75 mm used as functional bridge between FRP sheet and concrete substrate. However, problems would appear and how to deal with the interfacial transition zone（ITZ） and make it stronger is the key point for...

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Bibliographic Details
Published in:Journal of Wuhan University of Technology. Materials science edition 2018-02, Vol.33 (1), p.117-123
Main Authors: 王发洲, LI Ming, QU Zhengyao, HU Shuguang, WANG Jun
Format: Article
Language:English
Subjects:
Absorptivity
Bond strength
Bonding agents
Bonding strength
Chemistry and Materials Science
Coupling agents
FRP
代理人
底层
材料表面
粒子尺寸
微观结构
SCA
试验性
Lightweight
Materials Science
Microhardness
Substrates
Weight reduction
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Summary:We experimentally studied the fine lightweight aggregate with the particle size range of 3.15-4.75 mm used as functional bridge between FRP sheet and concrete substrate. However, problems would appear and how to deal with the interfacial transition zone（ITZ） and make it stronger is the key point for this concept. Considering that silane coupling agent（SCA） can provide a better bond on a silicon-containing material surface, it was introduced as a modifying material to further improve the bond quality of the ITZ between lightweight aggregate and cement paste. Results indicated that the water absorptivity of lightweight aggregate can be controlled by SCA solutions, and the pull-off bond strength, mechanical strength, and microhardness were increased, which was attributed to the optimized microstructure under the condition of an appropriate concentration of SCA.
ISSN:1000-2413
1993-0437
DOI:10.1007/s11595-018-1795-y