Abstract
In the design protocols of pavement subgrade layers, the resilient modulus (MR) property assumes importance in evaluating the performance during their life-time under sustainable repeated or dynamics traffic-loads. The aim of this study is to evaluate the improvements achieved on the subgrade layers of fiber-treated lime-blended expansive soil. Two types of fibers exhibiting different surface properties were considered and their length(s) and dosage(s) (by dry weight of soil) were varied as 6 mm and 12 mm; and 0.2% and 0.6%, respectively. To ensure bonding between fiber and soil particles, dehydrated lime has been added to the soil-fiber mixture. The compacted specimens were cured up to 28 days. Dynamic resilient modulus MR tests were carried out in the laboratory for soil–lime-fiber mixtures using dynamic triaxial device. The obtained MR values were correlated with California Bearing Ratio (CBR) and Unconfined Compression Strength (UCS) values and appropriate models have been proposed to estimate MR. The results show significant increments in MR due to fiber reinforcement and are affected by fiber type, length and dosage. The proposed models considering CBR and UCS to predict MR have shown excellent correlations.
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The data used to support the findings of this study are available from the corresponding author upon request.
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Acknowledgements
The authors are grateful to the Deanship of Scientific Research, King Saud University, for funding this research through Vice Deanship of Scientific Research Chairs Program. The authors thank the reviewers for their constructive comments which helped the cause of the manuscript.
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AMA (First Author) and AABM (Third Author) conceived this research, designed, performed experiments and wrote the paper; MAA (Third Author) acquired funding for this research and participated in the interpretation of the data; KVV (Fourth Author) assisted in the analysis and participated in the revisions of it. All authors read and approved the final manuscript.
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Al-Mahbashi, A.M., Al-Shamrani, M.A., Moghal, A.A.B. et al. Correlation-Based Studies on Resilient Modulus Values for Fiber-Reinforced Lime-Blended Clay. Int. J. of Geosynth. and Ground Eng. 7, 59 (2021). https://doi.org/10.1007/s40891-021-00305-7
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DOI: https://doi.org/10.1007/s40891-021-00305-7