Bond strength between blended slag and Class F fly ash geopolymer concrete with steel reinforcement |
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| Affiliation: | 1. Department of Civil, Architectural and Environmental Engineering, Missouri University of Science and Technology, 212 Butler Carlton Hall, 1401 N. Pine Street, Rolla, MO 65409, USA;2. School of Civil Engineering and Environmental Science, University of Oklahoma, 423 Carson Engineering Center, 202 W. Boyd St., Norman, OK 73019-1024, USA;1. Department of Civil Engineering, Curtin University, GPO Box U1987, Perth, WA 6845, Australia;2. Infra Tech Pty Ltd, Perth, WA, Australia;1. Department of Civil Engineering, Sharda University, Greater Noida, India;2. Research and Technology Development Centre, Sharda University, Greater Noida, India |
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| Abstract: | In this paper, geopolymer concrete bond with both deformed and smooth reinforcing steel bars is investigated using the standard RILEM pull-out test. The geopolymer binder is composed of 85.2% of low calcium fly ash and 14.8% of ground granulated blast furnace slag (GGBFS). The tests were aimed to assess the development of the bond strength from 24 h to 28 days after casting, with different heat curing conditions. The results show that 48 h of heat curing at 80 °C is required in order to obtain similar or better performances to those of the reference 45 MPa OPC concrete. The 28-day bond strength and the overall bond stress–slip behaviour of the geopolymer concrete were similar to those previously reported for OPC-based concretes. Providing intensive heat curing, high early bond strength can be achieved showing that Class F fly ash geopolymer concrete is well suited for precast applications. |
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