Effect of water-to-cement ratio on cracking resistance of concrete at early age in restrained ring specimens
| Autor: | Jiacheng Kang, Prof.Dr. Dejian Shen, Yang Jiao, Ci Liu, Xiaojian Tang |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Canadian Journal of Civil Engineering. 49:706-715 |
| ISSN: | 1208-6029 0315-1468 |
| DOI: | 10.1139/cjce-2020-0757 |
| Popis: | Nowadays, low water-to-cement (w/c) ratio has been put into widespread use in engineering practice. However, low w/c ratio may give rise to high self-desiccation, which may lead to the decrease of early-age cracking resistance. Investigating the impact of w/c ratio on cracking resistance is utterly meaningful to better understand the cracking mechanism of concrete. However, the corresponding investigations remain lacking, especially when the ring test is utilized. In the present study, ring tests for three concrete mixtures with different w/c ratios were conducted to investigate the early-age cracking resistance of concrete from multiple parameters. Results showed that (i) the development rate of shrinkage of concrete for mixture W50 was slower than that for mixtures W33 and W40; (ii) the value and development rate of residual stress of concrete decreased when the w/c ratio increased; (iii) the relaxed stress for all mixtures developed rapidly at very early age, and reached the maximum value quickly; (iv) the cracking resistance of concrete increased when the w/c ratio increased at early age. |
| Databáze: | OpenAIRE |
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