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http://dx.doi.org/10.14481/jkges.2020.21.11.11

A Study on the Hardening Characteristics of Ground Injection Grout under Various Curing Conditions  

Heo, Hyungseok (Research Center, MM E&C)
Park, Innjoon (Department of Infrastructure Civil Engineering, Hanseo University)
Publication Information
Journal of the Korean GEO-environmental Society / v.21, no.11, 2020 , pp. 11-20 More about this Journal
Abstract
For water barrier and reinforcing grout in soft ground, the verification of durability was conducted over the initial and long-term ages under various curing conditions. The grout was made of water glass system, fast-hardening mineral (FHM) system, and acrylic polymer system. There were three types of curing conditions that were tab water curing, artificial seawater curing, and atmospheric curing. And the various tests were performed for each sample by age, uniaxial compressive strength, length change, and weight change. As artificial seawater, MgCl2 and MgSO4 aqueous solutions were prepared and used, respectively. As the test results, the fast-hardening mineral system and acrylic polymer system were cured stably without significant change in durability in tap water and artificial sea water, whereas water glass system showed a very rapid drop in durability under artificial sea water conditions compared to tap water. In atmospheric curing conditions, durability is lowered compared to water curing in all cases, and in particular, the weight loss in the FHM system and water glass system is about 62% and 60%, respectively, resulting in a significant decrease in durability.
Keywords
Soft ground; Curing condition; Fast-hardening mineral; Acrylic polymer; Injection grout;
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