Marilyn Sarkis, Antoine Naillon, Fabrice Emeriault, Christian Geindreau
{"title":"Shear strength measurement of a calcite bond between bio-cemented sand grains","authors":"Marilyn Sarkis, Antoine Naillon, Fabrice Emeriault, Christian Geindreau","doi":"10.1007/s10035-025-01567-y","DOIUrl":null,"url":null,"abstract":"<div><p>In this study, a contact-scale approach is developed in order to measure the strength of the bio-cemented bond under shear loading. Fifteen pairs of bio-cemented sand grains, coming from two different bulk samples with different calcite content, were first observed using high-resolution synchrotron X-ray tomography in order to compute the contact surface area, before being subjected to the shear loading. After failure, these samples were also observed using scanning electron microscopy and energy-dispersive X-ray spectroscopy in order to determine the failure mode. The results have shown that the shear strength is 2.11 times higher that the tensile strength for this material, and has an average value of 5.81 ± 1.99 MPa. Digital image correlation was used in this study in order to distinguish the samples that broke due to shear from those that broke due to rolling. Similarly to the case under tensile loading, failure was also observed to occur at the interface between the sand and the calcite crystals. The percentage of active calcite crystals <span>\\(\\hbox {f}_\\textrm{c}\\)</span> was also found to be around 25%, independently of the amount of calcite present in the initial bulk sample.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div><div><p>Main steps followed in the study that allow to find the shear strength of a bond between bio-cemented sand grains.</p></div></div></figure></div></div>","PeriodicalId":49323,"journal":{"name":"Granular Matter","volume":"27 4","pages":""},"PeriodicalIF":2.9000,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Granular Matter","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s10035-025-01567-y","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
In this study, a contact-scale approach is developed in order to measure the strength of the bio-cemented bond under shear loading. Fifteen pairs of bio-cemented sand grains, coming from two different bulk samples with different calcite content, were first observed using high-resolution synchrotron X-ray tomography in order to compute the contact surface area, before being subjected to the shear loading. After failure, these samples were also observed using scanning electron microscopy and energy-dispersive X-ray spectroscopy in order to determine the failure mode. The results have shown that the shear strength is 2.11 times higher that the tensile strength for this material, and has an average value of 5.81 ± 1.99 MPa. Digital image correlation was used in this study in order to distinguish the samples that broke due to shear from those that broke due to rolling. Similarly to the case under tensile loading, failure was also observed to occur at the interface between the sand and the calcite crystals. The percentage of active calcite crystals \(\hbox {f}_\textrm{c}\) was also found to be around 25%, independently of the amount of calcite present in the initial bulk sample.
Graphical Abstract
Main steps followed in the study that allow to find the shear strength of a bond between bio-cemented sand grains.
在这项研究中，为了测量剪切载荷下生物胶结的强度，开发了一种接触尺度的方法。在进行剪切加载之前，首先使用高分辨率同步加速器x射线断层扫描观察了来自两种不同方解石含量的不同体积样品的15对生物胶结砂粒，以计算接触表面积。失效后，利用扫描电子显微镜和能量色散x射线能谱对这些样品进行观察，以确定失效模式。结果表明，该材料的抗剪强度是抗拉强度的2.11倍，其平均值为5.81±1.99 MPa。在本研究中，为了区分因剪切而破裂的样品和因滚动而破裂的样品，使用了数字图像相关。与拉伸载荷下的情况类似，也观察到在砂和方解石晶体之间的界面发生破坏。活性方解石晶体\(\hbox {f}_\textrm{c}\)的比例也在25％左右%, independently of the amount of calcite present in the initial bulk sample.Graphical AbstractMain steps followed in the study that allow to find the shear strength of a bond between bio-cemented sand grains.
期刊介绍：
Although many phenomena observed in granular materials are still not yet fully understood, important contributions have been made to further our understanding using modern tools from statistical mechanics, micro-mechanics, and computational science.
These modern tools apply to disordered systems, phase transitions, instabilities or intermittent behavior and the performance of discrete particle simulations.
>> Until now, however, many of these results were only to be found scattered throughout the literature. Physicists are often unaware of the theories and results published by engineers or other fields - and vice versa.
The journal Granular Matter thus serves as an interdisciplinary platform of communication among researchers of various disciplines who are involved in the basic research on granular media. It helps to establish a common language and gather articles under one single roof that up to now have been spread over many journals in a variety of fields. Notwithstanding, highly applied or technical work is beyond the scope of this journal.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
