Effect of Ultra-fine Fly Ash on Rheological Properties, Mechanical Properties and Microstructure of Ultra-high Performance Concrete

doi:10.11896/cldb.18060180

IR > 土木工程学院

	Effect of Ultra-fine Fly Ash on Rheological Properties, Mechanical Properties and Microstructure of Ultra-high Performance Concrete
	Cao, Runzhuo 1,2; Zhou, Mingru1,2 ; Zhou, Qun 1,2; He, Yong 1,2
	2019-08-25
发表期刊	Cailiao Daobao/Materials Reports
ISSN	1005023X
卷号	33 期号:8 页码:2684-2689
摘要	In order to investigate the effect of ultra-fine fly ash (UFA) on the impact of ultra-high performance concrete (UHPC), the rheological properties, mechanical properties, pore structure and microstructure of UHPC were systematically studied by using UFA instead of NFA. The results show that when the mass fraction of UFA substitutes for NFA is less than 50%, the fluidity of UHPC would be significantly improved with the increase of the amount of UFA, and the further increase in the substitution of UFA (more than 50%) would reduce the fluidity of UHPC. The rheological properties also show that UFA could significantly reduce the yield stress and viscosity of UHPC paste. The mechanical test results show that the compressive strength and flexural strength of UHPC increase with the increase of UFA substitution amount. When UFA completely replace NFA (100%), the maximum compressive strength and flexural strength can reach 167.2 MPa and 25.2 MPa, respectively. Mercury pressure and X-CT were used to test the porosity of the UHPC hardened body. The results show that UFA can reduce the porosity of UHPC, and the scanning electron microscope also shows that UFA can make the microstructure of UHPC more compact, thus enabling the UHPC to exhibit excellent mechanical properties. © 2019, Materials Review Magazine. All right reserved.
关键词	Bending strength Compressive strength Computerized tomography Fluidity Fly ash Pore structure Porosity Rheology Scanning electron microscopy Yield stress Maximum compressive strengths Mercury pressures Properties and microstructures Rheological property Strength Structure and microstructures Ultra high performance concretes (UHPC) Ultra-fine fly ash
DOI	10.11896/cldb.18060180
收录类别	EI
语种	中文
出版者	Cailiao Daobaoshe/ Materials Review
EI入藏号	20194407595489
EI主题词	Ultra-high performance concrete
EI分类号	723.5 Computer Applications - 931.1 Mechanics - 931.2 Physical Properties of Gases, Liquids and Solids - 951 Materials Science
来源库	Compendex
分类代码	723.5 Computer Applications - 931.1 Mechanics - 931.2 Physical Properties of Gases, Liquids and Solids - 951 Materials Science
引用统计	无
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/113962
专题	土木工程学院
作者单位	1.Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province, Lanzhou University of Technology, Lanzhou; 730050, China; 2.Engineering Research Center for Disaster Prevention and Reduction of Civil Engineering in Western China, Lanzhou University of Technology, Lanzhou; 730050, China
第一作者单位	甘肃省土木工程防灾减灾重点实验室; 兰州理工大学
第一作者的第一单位	甘肃省土木工程防灾减灾重点实验室
推荐引用方式 GB/T 7714	Cao, Runzhuo,Zhou, Mingru,Zhou, Qun,et al. Effect of Ultra-fine Fly Ash on Rheological Properties, Mechanical Properties and Microstructure of Ultra-high Performance Concrete[J]. Cailiao Daobao/Materials Reports,2019,33(8):2684-2689.
APA	Cao, Runzhuo,Zhou, Mingru,Zhou, Qun,&He, Yong.(2019).Effect of Ultra-fine Fly Ash on Rheological Properties, Mechanical Properties and Microstructure of Ultra-high Performance Concrete.Cailiao Daobao/Materials Reports,33(8),2684-2689.
MLA	Cao, Runzhuo,et al."Effect of Ultra-fine Fly Ash on Rheological Properties, Mechanical Properties and Microstructure of Ultra-high Performance Concrete".Cailiao Daobao/Materials Reports 33.8(2019):2684-2689.