Modified cement-sodium silicate material and grouting technology for repairing underground concrete structure cracks
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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.
KeywordsGrouting repair C-S material Grouting technology Concrete structure cracks
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).
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Conflict of interest
The authors declare that they have no conflict of interest.
- Bediako M (2014) Influence of clay pozzolana on some properties of Portland limestone cement. Construction Research Congress, Atlanta, pp 1547–1555Google Scholar
- Ju XW, Peng HL, Gao PW et al (2016) Study of properties of modified aqueous epoxy mortar used in rehabilitation of tunnel concrete cracks. Tunn Constr 36(4):398–402Google Scholar
- Li YJ, Wang MS, Xu HJ et al (2014) Force analysis of lining structure for subway tunnel with crack disease. China Railway Sci 35(3):64–69Google Scholar
- Liu DJ, Huang HW, Yue QR et al (2015) Study on cracking mechanism and rapid repair method for tensile cracks of tunnel linging. China Civil Eng J 2015(s1):236–243Google Scholar
- Peng L, Ren H, Fu LX, et al (2014) Prevention and control of water damage prediction in Qingping tunnel. Annual meeting of national highway maintenance technology (Annual conference 2013). Xiamen, China, pp 6–11Google Scholar
- Wang L, Lu KC, Li ZJ et al (2012) Microtrauma treatment techniques for tunnel seepage. Chin J Undergr Space Eng 8(6):1239–1243Google Scholar
- Yang Z, Niu X, Hou K et al (2015) Columnar diffusion of cement grout with time dependent rheological parameters. Chin J Rock Mech Eng 34(7):1415–1425Google Scholar
- Yu J (2017) Study on the influence of stress distribution law by lining crack in highway tunnel. China Civil Eng J 50(s1):70–75Google Scholar
- Zhang ZW, Jiang XL, Xie Q (2015) Dissolution of silicon and aluminum from fly ash and directional synthesis of X-type zeolite. Bull Chin Ceram Soc 34(11):3095–3101Google Scholar
- Zhang QS, Zhang LZ, Liu RT et al (2016) Split grouting theory based on slurry-soil coupling effects. Chin J Geotech Eng 38(2):323–330Google Scholar
- Zhao Z, Feng X, Li Z et al (2013) Concrete durability affected by aggressive carbon dioxide in groundwater. J Chin Ceram Soc 41(2):224–229Google Scholar