A Study on Local Cracking of Concrete Subjected to Seawater

摘要：

　　The marine environment is harsh on concrete structures because seawater contains many aggressive ions including sulfates.A splashing zone that has repeated wetting-drying cycles and temperature changes due to solar radiation is especially harmul for concrete.In the splashing zone, local cracking on the surface of concrete specimens is occasionally observed.Therefore, it is important to investigate the mechanism of local cracking formation due to seawater attack.This study presents some cases of local cracking of concrete specimens exposed in the splashing zone.Then, thermodynamic phase equilibrium calculation is performed to estimate the mechanism and associated factors causing local cracking.From the results, it is estimated that a high degree of supersaturation of pore water might result in precipitation and dissolution of ettringite because the concrete surface layer is subjected to wetting-drying cycles with a large temperature variation due to solar radiation.

作者: K.Yonamine T.Yamaji Y.Kawabata

作者单位: National Institute of Maritime, Port and Aviation Technology, Port and Airport Research Institute-Japan

会议类型: 国际会议

会议名称: The 8th International Conference of Asian Concrete Federation(ACF2018)(第8届亚洲混凝土协会国际会议)(第15届全国混凝土结构基本理论及工程应用学术会议)

会议地点: 福州

会议语种:英文

页码: 587-594

在线出版日期: 2018-11-04（万方平台首次上网日期，不代表论文的发表时间）