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- 저자 : Qifeng Wen (검색결과 2 건)
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Experimental study on unconfined compressive strength of rubberized cemented soil
Jie He,Duanwei Guo,Dexin Song,Fangcheng Liu,Lei Zhang,Qifeng Wen 대한토목학회 2023 KSCE Journal of Civil Engineering Vol.27 No.10
As an economical and environmentally friendly lightweight filler material, rubberized cemented soil has a broad application prospect in engineering. In order to analyze its engineering characteristics, the stress-strain curves were obtained by the unconfined compressive strength test under different compounding conditions, focusing on the changes in rubber particle size, rubber content, cement content, and curing age on the strength of rubberized cemented soil. Results indicate that: we can divide the stress-strain curve of rubberized cemented soil into four stages: compression dense stage, elastic deformation stage, yielding stage, and post-damage stage; the ductility and plasticity change regularly with cement content, rubber content, and rubber particle size; the strength of rubberized cemented soil increases with the increase of cement content and decreases with the increase of rubber content; In the content range of this test, the strength growth rate is the largest at the level of 5% − 10%, and the strength reduction rate is the smallest at 0% − 5% of rubber powder content; the unconfined compressive strength decreases and then increases as particle size grows, reaching its lowest value at 1 − 3 mm, which is considered to be the inferior particle size and the verification of the existence of the optimum particle size; the unconfined compressive strength of rubberized cemented soil has an excellent linear relation with the natural logarithm of the curing age, and its strength increases with the increase of lnT; a new comprehensive characterization parameter PCRT is proposed, which can effectively characterize the effects of rubber content, cement content and curing age on the compressive strength of rubberized cemented soil, and has a good power function relation.
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Jie He,Duanwei Guo,Dexin Song,Fangcheng Liu,Lei Zhang,Qifeng Wen 대한토목학회 2024 KSCE Journal of Civil Engineering Vol.28 No.5
The authors appreciated the discussants for their suggestions on their recent paper regarding four key topics: the evaluation of the ductility index of rubberized cemented soil, comparative analysis between predicted models and actual results, providing guidance and suggestions for the application of rubberized cemented soil in engineering practice, and evaluating the environmental impact of rubberized cemented soil. These discussions have practical significance and are worth further research in order to contribute to the research and application of rubberized cemented soil.
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