Geomechanics and Engineering

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Experimental study on the strength behavior of cement-stabilized sand with recovered carbon black

  • Chhun, Kean Thai (Department of Civil Engineering, Gangneung-Wonju National University) ;
  • Choo, Hyunwook (Department of Civil Engineering, Kyung Hee University) ;
  • Kaothon, Panyabot (Department of Civil Engineering, Gangneung-Wonju National University) ;
  • Yune, Chan-Young (Department of Civil Engineering, Gangneung-Wonju National University)
  • Received : 2020.06.15
  • Accepted : 2020.09.03
  • Published : 2020.10.10
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Abstract

Soil-cement stabilization is a type of ground improvement method which has been used to improve the engineering properties of soil. The unconfined compression test is the commonly used method to evaluate the quality of the stabilized soil due to its simplicity, reliability, rapidity and cost-effectiveness. The main objective of this study was to evaluate the effect of recovered carbon black (rCB) on the strength characteristic of cement-stabilized sand. Various rCB contents and water to cement ratios (w/c) were examined. The unconfined compression test on stabilized sand with different curing times was also conducted for a reconstituted specimen. From the test result, it was found that the compressive strength of cement-stabilized sand increased with the increase of the rCB content up to 3% and the curing time and with the decrease of the w/c ratio, showing that the optimum rCB concentration of the tested stabilized sand was around 3%. In addition, a prediction equation was suggested in this study for cement-stabilized sand with rCB as a function of the w/c ratio and rCB concentration at 14 and 28 days of curing.

Keywords

Acknowledgement

This work is supported by the Korea Agency for Infrastructure Technology Advancement (KAIA) grant funded by the Ministry of Land, Infrastructure and Transport (Grant 20SCIP-C151438-02/20SCIP-C151585-02). We gratefully acknowledge Mr. Cho Heung-Seok for his support of this project.

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