A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Research on chloride diffusion and flexural behavior of beams strengthened with TRC subjected to dry-wet cycles
https://orcid.org/0000-0002-9515-578X
Highlights TRC can improve the durability of RC beams under the chloride dry-wet cycles. The number of dry-wet cycles effect chloride ion contents and diffusion coefficient. The chloride resistance and property of beam were improved via adding PVA fibers. The modified bearing capacity model agrees well with the experimental results.
Abstract This paper presents an experimental study on the flexural durability of beams strengthened with TRC subjected to dry-wet cycles. The effects of dry-wet cycles (180, 210, 240, 270 and 330) and the short-cut fiber contents (0, 0.2%, 0.5% and 1%) on chloride transport and flexural behavior were investigated. The results showed that with the increase of dry-wet cycles, the chloride ion content in the TRC increased, while the diffusion coefficient decreased, the micro-structure of the TRC matrix was obviously damaged after 330 cycles. A certain amount of short-cut fibers was beneficial to improve the chloride transport resistance of the TRC matrix. The effect of increasing dry-wet cycles on the overall mechanical properties of the strengthened beams fluctuated when there were few dry-wet cycles. However, the mechanical properties of the strengthened beams significantly diminished after 330 cycles. The mechanical properties of the strengthened beams were enhanced with the increase of short-cut fiber content, and the promotion effect was obvious as it reached 1%. Finally, the ultimate bearing capacity formula of TRC-strengthened beams subjected to dry-wet cycles was modified based on the test results.
Research on chloride diffusion and flexural behavior of beams strengthened with TRC subjected to dry-wet cycles
https://orcid.org/0000-0002-9515-578X
Highlights TRC can improve the durability of RC beams under the chloride dry-wet cycles. The number of dry-wet cycles effect chloride ion contents and diffusion coefficient. The chloride resistance and property of beam were improved via adding PVA fibers. The modified bearing capacity model agrees well with the experimental results.
Abstract This paper presents an experimental study on the flexural durability of beams strengthened with TRC subjected to dry-wet cycles. The effects of dry-wet cycles (180, 210, 240, 270 and 330) and the short-cut fiber contents (0, 0.2%, 0.5% and 1%) on chloride transport and flexural behavior were investigated. The results showed that with the increase of dry-wet cycles, the chloride ion content in the TRC increased, while the diffusion coefficient decreased, the micro-structure of the TRC matrix was obviously damaged after 330 cycles. A certain amount of short-cut fibers was beneficial to improve the chloride transport resistance of the TRC matrix. The effect of increasing dry-wet cycles on the overall mechanical properties of the strengthened beams fluctuated when there were few dry-wet cycles. However, the mechanical properties of the strengthened beams significantly diminished after 330 cycles. The mechanical properties of the strengthened beams were enhanced with the increase of short-cut fiber content, and the promotion effect was obvious as it reached 1%. Finally, the ultimate bearing capacity formula of TRC-strengthened beams subjected to dry-wet cycles was modified based on the test results.
Research on chloride diffusion and flexural behavior of beams strengthened with TRC subjected to dry-wet cycles
https://orcid.org/0000-0002-9515-578X
Highlights TRC can improve the durability of RC beams under the chloride dry-wet cycles. The number of dry-wet cycles effect chloride ion contents and diffusion coefficient. The chloride resistance and property of beam were improved via adding PVA fibers. The modified bearing capacity model agrees well with the experimental results.
Abstract This paper presents an experimental study on the flexural durability of beams strengthened with TRC subjected to dry-wet cycles. The effects of dry-wet cycles (180, 210, 240, 270 and 330) and the short-cut fiber contents (0, 0.2%, 0.5% and 1%) on chloride transport and flexural behavior were investigated. The results showed that with the increase of dry-wet cycles, the chloride ion content in the TRC increased, while the diffusion coefficient decreased, the micro-structure of the TRC matrix was obviously damaged after 330 cycles. A certain amount of short-cut fibers was beneficial to improve the chloride transport resistance of the TRC matrix. The effect of increasing dry-wet cycles on the overall mechanical properties of the strengthened beams fluctuated when there were few dry-wet cycles. However, the mechanical properties of the strengthened beams significantly diminished after 330 cycles. The mechanical properties of the strengthened beams were enhanced with the increase of short-cut fiber content, and the promotion effect was obvious as it reached 1%. Finally, the ultimate bearing capacity formula of TRC-strengthened beams subjected to dry-wet cycles was modified based on the test results.
Research on chloride diffusion and flexural behavior of beams strengthened with TRC subjected to dry-wet cycles
Yun-tao, Hua (author) / Shi-ping, Yin (author) / Yu-lin, Yu (author) / Shan, Li (author)
2019-09-06
Article (Journal)
Electronic Resource
English
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