大掺量磨细矿渣混凝土箱涵裂缝处理方法研究与应用

doi:10.19640/j.cnki.jtau.2022.04.014

Journal of Tianjin Agricultural University ›› 2022, Vol. 29 ›› Issue (4): 70-74.doi: 10.19640/j.cnki.jtau.2022.04.014

• Researches and Scientific Notes • Previous Articles Next Articles

Research and application on crack treatment of concrete box culvert with large amount of pulverized slag

Zhu Xiuqing¹, Liu Min², Ma Huixin¹, Yu Ping^{1,Corresponding Author}

1. College of Water Conservancy Engineering, Tianjin Agricultural University, Tianjin 300392, China;
2. Tianjin Jinfan Engineering Construction Supervision Co. Ltd., Tianjin 300061, China

Received:2021-11-22 Online:2022-12-30 Published:2023-01-03

Abstract

Abstract: Among the seven civil construction bids of the 1st section of Tianjin South-to-North Water Transfer Project, the box culvert concrete of TJ5-4 and TJ5-5 adopted high slag content to improve the concrete performance. In the later practical application, it was found that the wall and roof of the box culvert had different degrees of construction cracks. In order to solve this problem, the new JX-5 series epoxy slurry material was used for chemical grouting for the transverse and longitudinal cracks of the box culvert, with the method of increasing section, and applying protective materials in and outside the box for experimental treatment. The results of freeze-thaw test showed that the cracks of concrete box culvert with large amount of ground slag had good performance after chemical grouting, and the surface of cracks was dry without seepage phenomenon. After the test, the concrete can continue to meet the engineering requirements of the mechanical properties and durability indicators.

Key words: concrete, large dosage, ground granulated slag, cracks in the box culvert

CLC Number:

TV43
TV52

Zhu Xiuqing, Liu Min, Ma Huixin, Yu Ping. Research and application on crack treatment of concrete box culvert with large amount of pulverized slag[J]. Journal of Tianjin Agricultural University, 2022, 29(4): 70-74.

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Research and application on crack treatment of concrete box culvert with large amount of pulverized slag

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