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An investigation on the strain accumulation of the lightly eicp-cemented sands under cyclic traffic loads

Journal of Road Engineering 2023年第2期3卷 203-217页

作者： Emad Maleki Tabrizi Hamid Reza Tohidvand Masoud Hajialilue-Bonab Elham Mousavi Saba Ghassemi Department of Civil Engineering University of TabrizTabriz 51666-16471Iran

Industrial production of chemical cement leads to extreme emissions of greenhouse *** or bioinspired sustainable materials for soil treatment projects can be employed instead of chemical cement to heal the carbon cycle in the *** enzyme-induced calcite precipitation(eicp)method is one of the novel bio-inspired technologies that can be employed in soil treatment projects to increase desired properties of *** the monotonic and cyclic behavior of the enzymatically treated sands has been investigated comprehensively,the strain accumulation pattern in these improved soils under cyclic traffic loads has not been evaluated *** this paper,confined and unconfined cyclic compression tests are applied to the enzymatically lightly cemented sands,and the effects of the different parameters on their strain accumulation pattern are investigated for the first time in the *** study uses two types of specimens with unconfined compression strengths(UCS)equal to 42 kPa and 266 *** is shown that the treated specimens have a rate-dependent behavior where cyclic loads with low frequencies lead to more resilient and plastic strains in the *** results show that by approaching the maximum applied stresses to the UCS of the specimens(by breaking more calcite bonds between sand particles),the rate dependency behavior of specimens will *** of the effects of the cementation level demonstrated that by increasing the amount of the precipitated calcite from 0.38%to 0.83%,accumulated plastic strains are reduced almost 95%under the same loading *** of the initial static loads,confining pressures,the number of cycles,and amplitudes of the cyclic loads are also evaluated.

关键词： Traffic load eicp method Bio-inspired treatment Unconfined compression Confined compression

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