Effects of microfine aggregate in manufactured sand on bleeding and plastic shrinkage cracking of concrete

作     者：Branavan ARULMOLY Chaminda KONTHESINGHA Anura NANAYAKKARA Branavan ARULMOLY;Chaminda KONTHESINGHA;Anura NANAYAKKARA

作者机构：Department of Civil EngineeringUniversity of Sri JayewardenepuraMount Lavinia 10370Sri Lanka Department of Civil EngineeringUniversity of MoratuwaMoratuwa 10400Sri Lanka 

出 版 物：《Frontiers of Structural and Civil Engineering》 (结构与土木工程前沿（英文版）)

年 卷 期：2022年第16卷第11期

页      面：1453-1473页

核心收录：

学科分类：08[工学] 081304[工学-建筑技术科学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0813[工学-建筑学] 0814[工学-土木工程] 

基　　金：The authors are grateful to INSEE Siam City Sri Lanka for providing the necessary binding materials to conduct this study.Furthermore the authors wish to thank all technical staffs of the Department of Civil Engineering University of Sri Jayewardenepura for their support on the experimental work 

主　　题：manufactured sand fresh concrete microfines admixtures shrinkage cracking 

摘      要：Construction industries have started to utilize manufactured sand(MS)as an effective alternative for river sand in ***-grade parent rocks are crushed to obtain MS,which also produces a considerable amount of microfine aggregate(MFA).The higher percentage of MFA could lead to both positive and negative effects on the performance of cement-based *** research was done to examine the influence of varying MFA levels,specifically 0%,3%,6%,9%,and 12%(by weight)as the partial replacements of MS on bleeding and plastic shrinkage cracking of *** addition to the varying MFA levels,some concrete mixes also included fly ash(FA)and superplasticizer to investigate the effect of free-water content in the *** bleeding test data were taken as on-site measurements,while the cracks from the plastic shrinkage cracking test were evaluated using an image processing *** results concluded that the MFA replacements and the effective water-to-cement ratio have a significant effect on the selected concrete *** the increasing replacement levels,cumulative bleeding and crack initiation life gradually decreased,while a progressive increase was observed for crack width,crack length,and crack area.