The concrete slump test—A rheometer by definition?

IF 8 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Construction and Building Materials Pub Date : 2025-02-07 DOI:10.1016/j.conbuildmat.2024.139839

Callum White, Janet M. Lees

{"title":"The concrete slump test—A rheometer by definition?","authors":"Callum White, Janet M. Lees","doi":"10.1016/j.conbuildmat.2024.139839","DOIUrl":null,"url":null,"abstract":"<div><div>While the slump test is often used to evaluate fresh state concrete performance, it is not considered a rheometer because it relies on slump height as a characterisation parameter. This study presents phenomenological slump observations obtained through 24 experimental tests. The relationships between the dimensionless groups are investigated, and three flow regimes are identified: slumping (dimensionless slump below 0.55), intermediate (dimensionless slump between 0.55 and 0.65) and spreading (dimensionless slump exceeding 0.65). A relationship between viscosity, yield stress and slump cessation time is presented, and a novel digital approach to obtain cessation time using an accelerometer is proposed. The slump measured viscosity is compared to the viscosity obtained via a torque vane rheometer, and an average error of 10% is observed. This work demonstrates that by incorporating digital tools such as 3D reconstruction and accelerometers, the slump test can provide accurate measurements of yield stress and viscosity in practical settings.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"462 ","pages":"Article 139839"},"PeriodicalIF":8.0000,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Construction and Building Materials","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S095006182404981X","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CONSTRUCTION & BUILDING TECHNOLOGY","Score":null,"Total":0}

引用次数: 0

Abstract

While the slump test is often used to evaluate fresh state concrete performance, it is not considered a rheometer because it relies on slump height as a characterisation parameter. This study presents phenomenological slump observations obtained through 24 experimental tests. The relationships between the dimensionless groups are investigated, and three flow regimes are identified: slumping (dimensionless slump below 0.55), intermediate (dimensionless slump between 0.55 and 0.65) and spreading (dimensionless slump exceeding 0.65). A relationship between viscosity, yield stress and slump cessation time is presented, and a novel digital approach to obtain cessation time using an accelerometer is proposed. The slump measured viscosity is compared to the viscosity obtained via a torque vane rheometer, and an average error of 10% is observed. This work demonstrates that by incorporating digital tools such as 3D reconstruction and accelerometers, the slump test can provide accurate measurements of yield stress and viscosity in practical settings.

查看原文本刊更多论文

混凝土坍落度试验-流变仪的定义？

虽然坍落度试验通常用于评估新状态混凝土的性能，但它不被认为是流变仪，因为它依赖于坍落度高度作为表征参数。本文介绍了通过24次试验获得的滑塌现象观测结果。研究了无量纲群之间的关系，确定了三种流动形式：坍落（无量纲坍落度低于0.55）、中间（无量纲坍落度介于0.55和0.65之间）和扩散（无量纲坍落度超过0.65）。提出了粘度、屈服应力和坍落度停止时间之间的关系，并提出了一种利用加速度计获取停止时间的数字方法。将测量的坍落度粘度与通过转矩叶片流变仪获得的粘度进行比较，观察到平均误差为10%。这项工作表明，通过结合3D重建和加速度计等数字工具，坍落度测试可以在实际环境中提供精确的屈服应力和粘度测量。

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分钟内获得全文求助全文

来源期刊

Construction and Building Materials 工程技术-材料科学：综合

CiteScore

13.80

自引率

21.60%

发文量

3632

审稿时长

82 days

期刊介绍： Construction and Building Materials offers an international platform for sharing innovative and original research and development in the realm of construction and building materials, along with their practical applications in new projects and repair practices. The journal publishes a diverse array of pioneering research and application papers, detailing laboratory investigations and, to a limited extent, numerical analyses or reports on full-scale projects. Multi-part papers are discouraged. Additionally, Construction and Building Materials features comprehensive case studies and insightful review articles that contribute to new insights in the field. Our focus is on papers related to construction materials, excluding those on structural engineering, geotechnics, and unbound highway layers. Covered materials and technologies encompass cement, concrete reinforcement, bricks and mortars, additives, corrosion technology, ceramics, timber, steel, polymers, glass fibers, recycled materials, bamboo, rammed earth, non-conventional building materials, bituminous materials, and applications in railway materials.