| Author Name | Affiliation | Postcode | | Lixia Wang | School of Transportation Science and Engineering, Jilin Jianzhu University, Changchun 130119, China | 130119 | | Zilin Hu | School of Transportation Science and Engineering, Jilin Jianzhu University, Changchun 130119, China | 130119 | | Qing Wang | School of Transportation Science and Engineering, Jilin Jianzhu University, Changchun 130119, China | 130119 | | Yunlong Zhang* | School of Transportation Science and Engineering, Jilin Jianzhu University, Changchun 130119, China | 130119 |
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| Abstract: |
| This study tested the electrical conductivity and pressure sensitivity of lime-improved silty sand reinforced with Carbon Fiber Powder (CFP) as the conductive medium. The influence of CFP dosage, moisture content and curing duration on the unconfined compressive strength, initial resistivity and pressure sensitivity of the improved soil was systematically analysed. The results showed that the unconfined compressive strength varied non-monotonically with increasing CFP dosage, reaching a peak at a dosage of 1.6%. Furthermore, the initial resistivity showed slight variations under different moisture conditions but eventually converged towards the conductive percolation threshold at a dosage of 2.4%. It is worth noting that CFP reinforced lime-improved silty sand (CRLS) exhibit a clear dynamic synchronization of strain with stress and resistivity rate of variation. The pressure sensitivity was optimized with CFP dosages ranging from 1.6% to 2.0%. Both insufficient and excessive dosages had a negative impact on pressure sensitivity. It is important to consider the weakening effect of high moisture content on the pressure sensitivity of the specimens in practical applications. |
| Key words: lime-improved silty sand CFP unconfined compressive strength resistivity pressure- sensitivity |
| DOI：10.11916/j.issn.1005-9113.24006 |
| Clc Number:TU521 |
| Fund: |
