| Issue |
E3S Web Conf.
Volume 283, 2021
2021 3rd International Conference on Civil, Architecture and Urban Engineering (ICCAUE 2021)
|
|
|---|---|---|
| Article Number | 01011 | |
| Number of page(s) | 4 | |
| Section | Research on Civil Engineering and Geotechnical Hydrological Structure | |
| DOI | https://doi.org/10.1051/e3sconf/202128301011 | |
| Published online | 07 July 2021 | |
Application of HCSA expansive agent in crack control of mass concrete
1 CCCC Tianjin Harbor Engineering Research Institute Co., Ltd., Tianjin, China
2 CCCC First Harbor Engineering Company Ltd., Tianjin, China
a,* Corresponding author: wxg58@126.com
b fanshiguang@tpei.com.cn
The open section of the west artificial island of the Hong Kong-Zhuhai-Macao Bridge is a mass concrete structure. The concrete was poured in two times in the vertical direction, that is, the whole bottom plate was poured in the first time, and the middle wall and two side walls were poured in the second time. The side wall and middle wall are easy to crack due to the long time interval between two concrete castings. In order to study the function and effect of HCSA expansion agent in the crack control of mass concrete, the applicable condition of compensating shrinkage in the crack control of mass concrete is analyzed first. Then the effect of HCSA expansion agent was studied in laboratory and field. The experimental results show that HCSA expander has a good expansion effect under laboratory conditions, but it has no expansion effect on the middle side of the mass concrete test block in the engineering site, instead, it will further increase the internal temperature rise of concrete and increase the shrinkage strain of concrete. HCSA expander is helpless for crack control of mass concrete.
© The Authors, published by EDP Sciences, 2021
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