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http://dx.doi.org/10.12989/acc.2021.12.5.367

Improvement of bond strength and durability of concrete incorporating high volumes of class F fly ash  

Wu, Chung-Hao (Department of Civil Engineering, Chung Yuan Christian University)
Chen, Chien-Jung (Architecture and Building Research Institute, Ministry of the Interior)
Lin, Yu-Feng (Department of Civil Engineering, Chienkuo Technology University)
Lin, Shu-Ken (Department of Civil Engineering, National Chung Hsing University)
Publication Information
Advances in concrete construction / v.12, no.5, 2021 , pp. 367-375 More about this Journal
Abstract
This study experimentally investigated the improvement of bond strength and durability of concrete containing high volume fly ash. Concrete mixtures made with 0%, 25% and 60% replacement of cement with class F fly ash were prepared. Water-binder ratios ranged from 0.28 to 0.72. The compressive, flexural and pullout bond strength, the resistance to chloride-ion penetration, and the water permeability of concrete were measured and presented. Test results indicate that except for the concretes at early ages, the mechanical properties, bond strength, and the durability-related chloride-ion permeability and water permeability of concrete containing high volume (60% cement replacement) fly ash were obviously superior to the concrete without fly ash at later ages of beyond 56 days. The enhanced bond strength for the high volume fly-ash concrete either with or without steel confinement is a significant finding which might be valuable for the structural application.
Keywords
bond strength; durability; high volume fly ash concrete; mechanical properties;
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