The leeb (Equotip) hardness test for rock materials: An overview, assessments on the factors influencing test results, and prediction models based on a large database

IF 4.2 2区工程技术 Q3 ENGINEERING, ENVIRONMENTAL Bulletin of Engineering Geology and the Environment Pub Date : 2025-02-25 DOI:10.1007/s10064-025-04170-w

Reşat Ulusay, Hakan Ersoy, Muhammet Oğuz Sünnetci, Murat Karahan

{"title":"The leeb (Equotip) hardness test for rock materials: An overview, assessments on the factors influencing test results, and prediction models based on a large database","authors":"Reşat Ulusay, Hakan Ersoy, Muhammet Oğuz Sünnetci, Murat Karahan","doi":"10.1007/s10064-025-04170-w","DOIUrl":null,"url":null,"abstract":"<div>This study aims to assess several factors affecting Leeb hardness (LH) test results for rock materials. Regression models for predicting some strength and deformability properties from LD values were proposed and compared based on a larger database from a comprehensive experimental program conducted and those compiled from the literature. The results indicate that Single Impact Method (SIM) is the most suitable method to obtain more reliable LD values when compared to Repeated Impact Method (RIM). In addition, RIM causes the formation of pits and bulges on the sample surface. 15 single impacts are sufficient to determine LD value that statistically represents optimal number of impacts to be applied. The test should be performed on samples with a length of (L) ≥ 50 mm (L/D ≥ 1) and the impacts should be applied by leaving a minimum distance at least equal to the diameter of the tester supporting ring from sample edge.</div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 3","pages":""},"PeriodicalIF":4.2000,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10064-025-04170-w.pdf","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Bulletin of Engineering Geology and the Environment","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s10064-025-04170-w","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, ENVIRONMENTAL","Score":null,"Total":0}

引用次数: 0

Abstract

This study aims to assess several factors affecting Leeb hardness (LH) test results for rock materials. Regression models for predicting some strength and deformability properties from L_D values were proposed and compared based on a larger database from a comprehensive experimental program conducted and those compiled from the literature. The results indicate that Single Impact Method (SIM) is the most suitable method to obtain more reliable L_D values when compared to Repeated Impact Method (RIM). In addition, RIM causes the formation of pits and bulges on the sample surface. 15 single impacts are sufficient to determine L_D value that statistically represents optimal number of impacts to be applied. The test should be performed on samples with a length of (L) ≥ 50 mm (L/D ≥ 1) and the impacts should be applied by leaving a minimum distance at least equal to the diameter of the tester supporting ring from sample edge.

查看原文

微信好友朋友圈 QQ好友复制链接

本刊更多论文

岩石材料的leeb （Equotip）硬度试验：综述、影响试验结果的因素评估以及基于大型数据库的预测模型

本研究旨在评估影响岩石材料里氏硬度（LH）测试结果的几个因素。本文提出了从LD值预测某些强度和变形性能的回归模型，并基于一个综合实验项目和从文献中编译的更大数据库进行了比较。结果表明，单次撞击法（SIM）比重复撞击法（RIM）更适合获得更可靠的LD值。此外，RIM还会在样品表面形成凹坑和凸起。15个单一影响足以确定LD值，该值在统计上代表要应用的最佳影响数量。测试应在长度(L)≥50mm （L/D≥1）的样品上进行，并且施加冲击时应保持至少等于测试器支撑环直径到样品边缘的最小距离。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文去求助

来源期刊

Bulletin of Engineering Geology and the Environment 工程技术-地球科学综合

CiteScore

7.10

自引率

11.90%

发文量

445

审稿时长

4.1 months

期刊介绍： Engineering geology is defined in the statutes of the IAEG as the science devoted to the investigation, study and solution of engineering and environmental problems which may arise as the result of the interaction between geology and the works or activities of man, as well as of the prediction of and development of measures for the prevention or remediation of geological hazards. Engineering geology embraces: • the applications/implications of the geomorphology, structural geology, and hydrogeological conditions of geological formations; • the characterisation of the mineralogical, physico-geomechanical, chemical and hydraulic properties of all earth materials involved in construction, resource recovery and environmental change; • the assessment of the mechanical and hydrological behaviour of soil and rock masses; • the prediction of changes to the above properties with time; • the determination of the parameters to be considered in the stability analysis of engineering works and earth masses.