Improvement of high-liquid limit soil in the subgrade of mine roadway

Improvement of high-liquid limit soil in the subgrade of mine roadway

Xingui Zhang  Zixing Chen  Nianping Yi 

College of Civil Engineering and Architecture Guangxi University, Nanning 530004, China

Corresponding Author Email: 
383056074@qq.com
Page: 
61-74
|
DOI: 
https://doi.org/10.3166/ACSM.41.61-74
Received: 
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Accepted: 
|
Published: 
30 June 2017
| Citation

OPEN ACCESS

Abstract: 

Considering the unfavourable engineering properties of high-liquid limit soil, this paper determines the optimal proportion of admixtures for a high-liquid limit soil treatment project of a mine roadway. Specifically, the high-liquid limit soil was modified with quicklime, cement, fly ash, and liquid stabilizer plus curing agent, and subjected to swell-shrink test, compaction test, and the California bearing ratio (CBR) test. The test results show that the soil modified by quicklime outperformed other modification alternatives, and satisfied the intensity requirements when the quicklime content is not less than 3%. The high-liquid limit soil, modified by fly ash, saw no intensity improvement, and had intensity similar to that of the plain soil. The modification by cement only partially enhanced the high-liquid limit soil, and the enhancement effect was not impressive. The treatment of CONAID stabilizer (4%) and curing agent (5%) lead to better swell-shrink features, but failed to achieve a major boost to soil intensity. This research shed important new light on the improvement of high-liquid limit soil in engineering projects

Keywords: 

mine road, subgrade, high liquid limit soil, admixture, improvement test

1. Introduction
2. Test materials and test plans
3. Test results analysis
4. Conclusion
  References

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