Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6717321 | Construction and Building Materials | 2018 | 11 Pages |
Abstract
This paper presents the experimental results on the flexural performance of steel fiber reinforced recycled coarse aggregate concrete (SFRCAC). Test parameters include compressive strength (30â¯MPa, 45â¯MPa, 60â¯MPa), recycled coarse aggregate (RCA) replacement ratio (0, 30%, 50%, 100%), and steel fiber volume fraction (0, 0.5%, 1%, 1.5%, 2%). Evaluation method of flexural performance in ASTM C1609 and Chinese Standard JG/T 427-2015 was investigated with respect to the variance in test parameters. Test results showed that compressive strength has the similar influence on SFRCAC and normal concrete; with RCA replacement ratio increasing, the flexural performance of SFRCAC before crack is quite similar, flexural strength and flexural toughness increase slightly, deflection increases heavily; with the steel fiber volume fraction (Vf) increasing, the reinforcement effect is not obvious when Vfâ¯<â¯0.5%, improved significantly when Vf increases from 0.5% to 1%, growth trend becomes flatter when Vf is above 1%. The evaluation methods of flexural performance in ASTM C1609 and JG/T 427-2015 are not suitable for SFRCAC due to its deflection is much higher than normal concrete. A new set of evaluation indexes have been put forward and test results have demonstrated that this evaluation method is concise and effective.
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Authors
Danying Gao, Lijuan Zhang,