Mix Proportion Design of Underwater Non-dispersible Grouting Material Containing Diatomite

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Mix Proportion Design of Underwater Non-dispersible Grouting Material Containing Diatomite

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[1]SUN Xiao,WANG Xiangyang,YANG Zhuanjia,et al.Mix Proportion Design of Underwater Non-dispersible Grouting Material Containing Diatomite[J].Journal of Zhengzhou University (Engineering Science),2026,47(4):33-41.[doi:10.13705/j.issn.1671-6833.2026.01.004]

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Journal of Zhengzhou University (Engineering Science)[ISSN 1671-6833/CN 41-1339/T] Volume: 47 Number of periods: 2026 Issue 4 Page number: 33-41 Column: Public date: 2026-07-10

Title:: Mix Proportion Design of Underwater Non-dispersible Grouting Material Containing Diatomite

Author(s):: SUN Xiao¹, WANG Xiangyang¹, YANG Zhuanjia², ZHANG Xinyu¹; 1. College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China; 2. Yan′an Water Affairs (Group) Yanhe Water Supply Company Limited, Yan′an 716000, China

Keywords:: underwater repair grouting material; porous material; anti-washout performance; flowability

CLC:: TV543+. 6TV431+. 9

DOI:: 10.13705/j.issn.1671-6833.2026.01.004

Abstract:: Aiming at the dispersion problem of underwater crack repair materials for concrete dams, an underwater non-dispersible grouting material containing diatomite was designed. Firstly, the mesh number and content of diat-omitewere determined by mercury intrusion test and single mixing test, and the influence of diatomite on the me-chanicalproperties of grouting materials was analyzed by compressive strength and splitting tensile strength tests. Secondly, the effects of hydroxypropyl methyl cellulose flocculant (HPMC) and ordinary PCA^®-typeⅠ polycarbox-ylicacid high performance water reducing agent on the flowability and anti-washout performance of grouting materi-alswere further studied by cone flowability method, visual observation method, pH value method, and plunge test. Finally, based on the orthogonal test method, the specific ratio of underwater grouting repair materials was deter-mined.The results showed that when the water-cement ratio was 0. 50, the diatomite had good compatibility with the slurry, and the addition of 2% ( mass fraction, the same below) 100 mesh diatomite could improve the com-pressivestrength and splitting tensile strength of the grouting material. On this basis, the addition of 0. 6% HPMC could improve the anti-washout performance of the slurry, and the addition of 0. 10% water reducing agent could improve its flowability. The diatomite mesh of underwater grouting material was determined to be 100 mesh, the content was 2%, the content of HPMC was 0. 6%, and the content of PCA^®-typeⅠ polycarboxylic acid high per-formancewater reducing agent was 0. 10%.

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Last Update: 2026-10-21