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http://dx.doi.org/10.12989/acc.2020.9.6.537

A new geopolymeric grout blended completely weathered granite with blast-furnace slag  

Zhang, Jian (Geotechnical and Structural Engineering Research Center, Shandong University)
Li, Shucai (Geotechnical and Structural Engineering Research Center, Shandong University)
Li, Zhaofeng (Geotechnical and Structural Engineering Research Center, Shandong University)
Li, Hengtian (Geotechnical and Structural Engineering Research Center, Shandong University)
Du, Junqi (Geotechnical and Structural Engineering Research Center, Shandong University)
Gao, Yifan (Geotechnical and Structural Engineering Research Center, Shandong University)
Liu, Chao (Geotechnical and Structural Engineering Research Center, Shandong University)
Qi, Yanhai (Geotechnical and Structural Engineering Research Center, Shandong University)
Wang, Wenlong (Geotechnical and Structural Engineering Research Center, Shandong University)
Publication Information
Advances in concrete construction / v.9, no.6, 2020 , pp. 537-545 More about this Journal
Abstract
In order to reduce the usage of cement slurry in grouting engineering and consume the tunnel excavation waste soil, a new geopolymeric grouting material (GGM) was prepared by combine completely weathered granite (CWG) and blast-furnace slag (BFS), which can be applied to in-situ grouting treatment of completely weathered granite strata. The results showed CWG could participate in the geopolymerization process, and GGM slurry has the characteristics of short setting time, high flowability, low viscosity, high stone rate and high mechanical strength, and a design method of grouting pressure based on viscosity evolution was proposed. By adjusted the content of completely weathered granite and alkali activator concentration, the setting time of GGM were ranged from 5 to 30 minutes, the flowability was more than 23.5 cm, the stone rate was higher than 90%, the compressive strength of 28 days were 7.8-16.9 MPa, the porosity were below 30%. This provides a novel grouting treatment and utilizing excavated soil of tunnels in the similar strata.
Keywords
completely weathered granite; blast-furnace slag; geopolymer; grouting material; flowability; compressive strength; microstructure;
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Times Cited By KSCI : 4  (Citation Analysis)
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