Rheological Estimation of Flowing Mortar with a Superplasticizer

S. Kakuta
{"title":"Rheological Estimation of Flowing Mortar with a Superplasticizer","authors":"S. Kakuta","doi":"10.14359/6195","DOIUrl":null,"url":null,"abstract":"The fluidity of self compacting concrete is influenced by the fluidity of the composed mortar. This paper discusses the rheological estimation of the fluidity of high-flowing mortars with superplasticizers. The character of fine aggregates is considered the most effective factor on mortar fluidity. The applicability of the viscosity equation proposed by Mori and Ototake for condensed suspension liquids to highly-flowing mortar is discussed. Mortars were tested with different volume concentration of fine aggregate-suspended in highly-flowing paste. The result from rheological test using a Brookfield type viscometer indicated good agreement with the equation. Provided that the fluidity of the mortar behaves as a Bingham fluid, it can be estimated by plastic viscosity and yield value. These rheological tests were applied to two types of highly-flowing mortars composed of self compacting concrete mixtures ranging from 60 to 70 cm of slumping flow value. The effects of fine aggregate fluctuated with differences in water content, sand content and sand grading of the basic mortar. Test results showed that the character of the sand remarkably affects the fluidity of highly-flowing mortar.","PeriodicalId":21898,"journal":{"name":"SP-173: Fifth CANMET/ACI International Conference on Superplasticizers and Other Chemical Admixtures in Concrete","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"1997-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"SP-173: Fifth CANMET/ACI International Conference on Superplasticizers and Other Chemical Admixtures in Concrete","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.14359/6195","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0

Abstract

The fluidity of self compacting concrete is influenced by the fluidity of the composed mortar. This paper discusses the rheological estimation of the fluidity of high-flowing mortars with superplasticizers. The character of fine aggregates is considered the most effective factor on mortar fluidity. The applicability of the viscosity equation proposed by Mori and Ototake for condensed suspension liquids to highly-flowing mortar is discussed. Mortars were tested with different volume concentration of fine aggregate-suspended in highly-flowing paste. The result from rheological test using a Brookfield type viscometer indicated good agreement with the equation. Provided that the fluidity of the mortar behaves as a Bingham fluid, it can be estimated by plastic viscosity and yield value. These rheological tests were applied to two types of highly-flowing mortars composed of self compacting concrete mixtures ranging from 60 to 70 cm of slumping flow value. The effects of fine aggregate fluctuated with differences in water content, sand content and sand grading of the basic mortar. Test results showed that the character of the sand remarkably affects the fluidity of highly-flowing mortar.
掺有高效减水剂的流动砂浆流变学研究
自密实混凝土的流动性受复合砂浆流动性的影响。本文讨论了掺有高效减水剂的高流量砂浆流动性的流变学估计。细集料的特性被认为是影响砂浆流动性的最有效因素。讨论了Mori和Ototake提出的凝聚悬浮液粘度方程在高流动砂浆中的适用性。采用不同体积浓度的细骨料悬浮在高流动膏体中进行砂浆试验。用布鲁克菲尔德式粘度计进行流变试验的结果与公式吻合良好。假设砂浆的流动性表现为宾厄姆流体,则可以通过塑性粘度和屈服值来估计。这些流变学试验应用于两种由自密实混凝土混合物组成的高流动砂浆,其坍落流动值为60至70厘米。细骨料的作用随基本砂浆含水量、含砂量和砂级配的不同而波动。试验结果表明,砂的性质对高流动砂浆的流动性有显著影响。
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
自引率
0.00%
发文量
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信