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http://dx.doi.org/10.9720/kseg.2021.1.083

Analysis of the Physical and Mechanical Properties of Injected High-Density Polyurethane from Laboratory Experiments and Field Tests  

Choi, Junyoung (Department of Civil Engineering, Chosun University)
Kim, Daehyeon (Department of Civil Engineering, Chosun University)
Publication Information
The Journal of Engineering Geology / v.31, no.1, 2021 , pp. 83-101 More about this Journal
Abstract
The high-density polyurethane method uses the instantaneous expansion pressure of injected material to stabilize soft ground, allowing reinforcement, restoration, and construction to be carried out in suboptimal ground conditions. Under normal and, even poor conditions, the method is easily applied because the working time is very short. The method is environmentally friendly and results have excellent durability. The purpose of this study was to verify the physical and mechanical properties of high-density polyurethane in the ground. Initial testing of strength, direct shear, and soil environment stability was followed by testing for permeability in order to address environmental concerns. The results of the experiments showed that the internal friction angle was about twice as high and the adhesion was about 2.5 to 3.5 times higher than for dense and hard clay, and that the permeability factor was significantly lower compared with the existing grouting method, within the range of 1.0 × 10-5.
Keywords
expansion material; foam reaction; uniaxial compression test; direct shear test; permeability test;
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