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Modified cement-sodium silicate material and grouting technology for repairing underground concrete structure cracks

  • Bin Zhang
  • Feng Gao
  • Xuefu ZhangEmail author
  • Yuanfu Zhou
  • Beilun Hu
  • Heyang Song
GMGDA 2019
  • 29 Downloads
Part of the following topical collections:
  1. Geological Modeling and Geospatial Data Analysis

Abstract

The concrete cracks in an underground structure which usually result in serious water leakage are generally treated by grouting repair. However, the widely used cement-sodium silicate (C-S) grouting material for treatment has drawbacks. One is that the gelation time is so short that the grouted slurry will be likely to plug the grouting pipe; the other is that the C-S material has low corrosion resistance against water so the strength of the C-S material will decrease sharply after interaction with the underground water. By considering the disadvantages of the traditional C-S material, this study improves the C-S material with ultrafine fly ash (UFA) and Na2HPO4 and obtains its proper proportion by testing. In addition, a new grouting technology for concrete crack treatment is proposed for underground concrete structure. The modified C-S material and the repair technology have been successfully applied in a typical underground project suffering from serious water leakage, and it shows excellent repair effect. This study can provide theoretical and empirical reference for similar underground engineering.

Keywords

Grouting repair C-S material Grouting technology Concrete structure cracks 

Notes

Funding information

This work was supported by the National Natural Science Foundation of China (No. 51708070/51778095/41801053), Chongqing Science and Technology Commission (cstc2017jcyjAX0156; cstc2017shmsA30021; cstc2017jcyjAX0056), Chongqing Municipal Education Commission (KJ1705144; KJZH17120), and Open Program of State Key Laboratory Breeding Base of Mountain Bridge and Tunnel Engineering (CQSLBFY16–15).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Saudi Society for Geosciences 2019

Authors and Affiliations

  • Bin Zhang
    • 1
  • Feng Gao
    • 1
  • Xuefu Zhang
    • 1
    Email author
  • Yuanfu Zhou
    • 1
  • Beilun Hu
    • 2
  • Heyang Song
    • 1
  1. 1.School of Civil EngineeringChongqing Jiaotong UniversityChongqingChina
  2. 2.School of Material Science and EngineeringChongqing Jiaotong UniversityChongqingChina

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