Mix Proportion Design of Underwater Non-dispersible Grouting Material Containing Diatomite
[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(XX):1-9.[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 XX
Page number:
1-9
Column:
Public date:
2026-09-10
- Title:
- Mix Proportion Design of Underwater Non-dispersible Grouting Material Containing Diatomite
- Keywords:
- underwater repair grouting material; porous material; anti-washout performance; flowability
- CLC:
- TV543+.6；TV431+.9
- 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 diatomite were determined by mercury intrusion test and single mixing test, and the influence of diatomite on the mechanical properties 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®-type I polycarboxylic acid high performance water reducing agent on the flowability and anti-washout performance of grouting materials were 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 determined. 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 compressive strength 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®-type I polycarboxylic acid high performance water reducing agent was 0.10%.
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2026-01-13
