Strength characteristics of biomimetic carbonate precipitation (BCP) treated mortar under cyclic loading

Diao, Yu; Bai, Jitao; Huang, Jianyou; Li, Pengjin; Yang, Changchun

doi:10.1016/j.jobe.2023.107013

Cited by 2 publications

(1 citation statement)

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“…The existing literature has provided abundant knowledge on the effects of L-Asp on carbonate precipitation. Unfortunately, attempts have rarely been made for the possible application of L-Asp in sand reinforcement, and the investigation on shear properties is still insufficient [ 33 , 34 ]. Actually, the shear properties are the most basic and important mechanical properties for geotechnical materials [ 35 ].…”

Section: Introductionmentioning

confidence: 99%

A Simplified Model for Shear Behavior of Mortar Using Biomimetic Carbonate Precipitation

et al. 2023

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As a common molecule in biomineralization, L-aspartic acid (L-Asp) has been proven to be able to induce in vitro CaCO3 precipitation, but its application in sand reinforcement has never been studied. In this study, L-Asp was employed in sand reinforcement for the first time through the newly developed biomimetic carbonate precipitation (BCP) technique. Specimens with different number of BCP spray cycles were prepared, and a series of direct shear tests were conducted to investigate the impact of spray number on shear strength, critical displacement, and residual strength. Then a simplified power model for shear stress–displacement behavior was established and calibrated with the measured data. The results show that BCP can significantly improve the shear strength of sand. As the number of spray cycles increases, both the shear strength and residual strength increase, while the critical displacement decreases. Such variations can be described with two sigmoid models and a linear model, respectively. The simplified power model performs well in most cases, especially at higher spray numbers. This study is expected to provide a practical model for the shear behavior of BCP-treated mortar.

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Section: Introductionmentioning

confidence: 99%