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Effect of double hooked-end steel fiber on early-age cracking potential of high strength concrete in restrained ring specimens
https://orcid.org/0000-0002-0283-6835
Highlights Cracking potential of steel fiber reinforced concrete was studied by ring test. Residual stress or relaxed stress decreased with increasing amount of steel fiber. Free shrinkage or stress rate decreased with increasing amount of steel fiber. Cracking potential decreased with increasing amount of steel fiber.
Abstract High strength concrete (HSC) suffers significant shrinkage in response to low water-to-cement (w/c) ratio and high self-desiccation at early age. Cracking may occur when the residual tensile stress is over the tensile strength of HSC. Double hooked-end steel fiber can reduce the shrinkage and the cracking potential of HSC effectively. Investigations on cracking potential of early-age HSC reinforced with double hooked-end steel fiber by utilizing ring test remain lacking. Therefore, ring tests for four HSC mixtures with different amounts of double hooked-end steel fiber of 0%, 0.12%, 0.24%, and 0.36% were conducted in the present study. The analysis of experimental results indicated that (1) the steel ring strain decreased with increasing amount of double hooked-end steel fiber; (2) the residual stress or relaxed stress of HSC decreased with increasing amount of double hooked-end steel fiber; (3) the free shrinkage or stress rate of HSC decreased with increasing amount of double hooked-end steel fiber; (4) the cracking potential of HSC decreased with increasing amount of double hooked-end steel fiber. At the age of 21.25 d after casting, the cracking potential parameter was 0.875, 0.561, 0.440, and 0.329, which decreased by 35.9%, 49.7%, and 62.4% when the amount of double hooked-end steel fiber increased from 0% to 0.12%, 0.24%, and 0.36%, respectively.
Effect of double hooked-end steel fiber on early-age cracking potential of high strength concrete in restrained ring specimens
https://orcid.org/0000-0002-0283-6835
Highlights Cracking potential of steel fiber reinforced concrete was studied by ring test. Residual stress or relaxed stress decreased with increasing amount of steel fiber. Free shrinkage or stress rate decreased with increasing amount of steel fiber. Cracking potential decreased with increasing amount of steel fiber.
Abstract High strength concrete (HSC) suffers significant shrinkage in response to low water-to-cement (w/c) ratio and high self-desiccation at early age. Cracking may occur when the residual tensile stress is over the tensile strength of HSC. Double hooked-end steel fiber can reduce the shrinkage and the cracking potential of HSC effectively. Investigations on cracking potential of early-age HSC reinforced with double hooked-end steel fiber by utilizing ring test remain lacking. Therefore, ring tests for four HSC mixtures with different amounts of double hooked-end steel fiber of 0%, 0.12%, 0.24%, and 0.36% were conducted in the present study. The analysis of experimental results indicated that (1) the steel ring strain decreased with increasing amount of double hooked-end steel fiber; (2) the residual stress or relaxed stress of HSC decreased with increasing amount of double hooked-end steel fiber; (3) the free shrinkage or stress rate of HSC decreased with increasing amount of double hooked-end steel fiber; (4) the cracking potential of HSC decreased with increasing amount of double hooked-end steel fiber. At the age of 21.25 d after casting, the cracking potential parameter was 0.875, 0.561, 0.440, and 0.329, which decreased by 35.9%, 49.7%, and 62.4% when the amount of double hooked-end steel fiber increased from 0% to 0.12%, 0.24%, and 0.36%, respectively.
Effect of double hooked-end steel fiber on early-age cracking potential of high strength concrete in restrained ring specimens
https://orcid.org/0000-0002-0283-6835
Highlights Cracking potential of steel fiber reinforced concrete was studied by ring test. Residual stress or relaxed stress decreased with increasing amount of steel fiber. Free shrinkage or stress rate decreased with increasing amount of steel fiber. Cracking potential decreased with increasing amount of steel fiber.
Abstract High strength concrete (HSC) suffers significant shrinkage in response to low water-to-cement (w/c) ratio and high self-desiccation at early age. Cracking may occur when the residual tensile stress is over the tensile strength of HSC. Double hooked-end steel fiber can reduce the shrinkage and the cracking potential of HSC effectively. Investigations on cracking potential of early-age HSC reinforced with double hooked-end steel fiber by utilizing ring test remain lacking. Therefore, ring tests for four HSC mixtures with different amounts of double hooked-end steel fiber of 0%, 0.12%, 0.24%, and 0.36% were conducted in the present study. The analysis of experimental results indicated that (1) the steel ring strain decreased with increasing amount of double hooked-end steel fiber; (2) the residual stress or relaxed stress of HSC decreased with increasing amount of double hooked-end steel fiber; (3) the free shrinkage or stress rate of HSC decreased with increasing amount of double hooked-end steel fiber; (4) the cracking potential of HSC decreased with increasing amount of double hooked-end steel fiber. At the age of 21.25 d after casting, the cracking potential parameter was 0.875, 0.561, 0.440, and 0.329, which decreased by 35.9%, 49.7%, and 62.4% when the amount of double hooked-end steel fiber increased from 0% to 0.12%, 0.24%, and 0.36%, respectively.
Effect of double hooked-end steel fiber on early-age cracking potential of high strength concrete in restrained ring specimens
Shen, Dejian (author) / Kang, Jiacheng (author) / Yi, Xijun (author) / Zhou, Liukun (author) / Shi, Xiang (author)
Construction and Building Materials ; 223 ; 1095-1105
2019-07-29
11 pages
Article (Journal)
Electronic Resource
English
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