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Advances in Concrete Construction Volume 12, Number 5, November 2021 , pages 367-375 DOI: https://doi.org/10.12989/acc.2021.12.6.367 |
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Improvement of bond strength and durability of concrete incorporating high volumes of class F fly ash |
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Chung-Hao Wu, Chien-Jung Chen, Yu-Feng Lin and Shu-Ken Lin
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| 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. | ||
| Key Words | ||
| bond strength; durability; high volume fly ash concrete; mechanical properties | ||
| Address | ||
| Chung-Hao Wu: Department of Civil Engineering, Chung Yuan Christian University, No. 200 Chung Pei Road, Chung Li Dist., Taoyuan City 320, Taiwan Chien-Jung Chen: Architecture and Building Research Institute, Ministry of the Interior, 13F., No.200, Sec. 3, Beisin Rd., Sindian District,New Taipei City 23143, Taiwan Yu-Feng Lin: Department of Civil Engineering, Chienkuo Technology University, No.1, Chiehshou North Road, Changhua City 500, Taiwan Shu-Ken Lin: Department of Civil Engineering, National Chung Hsing University, No. 145 Xingda Rd., South Dist., Taichung City 402, Taiwan | ||
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