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| Discrete element modelling of the mechanical behavior of cemented carbonate sand considering the effects of particle shape and breakage |
| Received:January 29, 2022 Revised:March 27, 2022 |
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| DOI：10.7511/jslxCMGM202207 |
| KeyWord:cemented carbonate sand discrete element method particle shape particle breakage CT image |
| Author | Institution |
| 程壮 |
武汉理工大学 土木工程与建筑学院, 武汉 |
| 侯敏 |
哈尔滨工业大学威海 海洋工程学院, 威海 |
| 王剑锋 |
香港城市大学 建筑学与土木工程系, 香港 |
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| Abstract: |
| In recent years,carbonate sand has been widely used as a type of construction materials in the South China Sea Project.In this paper,the macro- and micro-scale mechanical behavior of cemented carbonate sand under biaxial compression was investigated using a discrete element model incorporating the effects of realistic particle shape and particle breakage.The stress-strain behavior and the evolution of particle and cement bond breakage,displacement field and crack distribution were studied.The effects of particle shape,particle size distribution,particle strength and cement strength on the mechanical behavior of cemented carbonate sand were analyzed.It was found that a larger size distribution of carbonate sand particles leads to a higher peak strength of the cemented carbonate sand.The cemented carbonated sand specimen with realistic particle shape exhibited a higher peak strength and a higher particle breakage degree than that with a round particle shape.The cemented carbonate sand with higher particle sand strength usually had better mechanical properties.However,the mechanical behavior of cemented carbonate sand could not be significantly improved by merely improving the cement strength.This study could provide a theoretical basis for the reinforcement of carbonate sands in engineering applications. |