机制砂中片状颗粒对水泥胶砂性能的影响

doi:10.11896/cldb.20020161

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Abstract Obtaining the different size flake particles from manufactured sand using bar-shaped sieve method, under the condition that the gradation of manufactured sand remained unchanged, the fluidity, flexural strength, compressive strength and pore structure characteristics of cement mortars were tested when the content of the combined particle size of the flake particles in the manufactured sand is 10%, 20%, and 30%, and the content of single flake particle size is 10% with the particle size of 1.18—2.36 mm, 2.36—4.75 mm, and 4.75—9.50 mm respectively. The experimental results show that with the increase of the particle size of the flake particles, the porosity of the manufactured sand increases, the porosity of the prepared cement mortar increases, and the number of harmful pores increases, which results in fluidity, flexural and compressive strength of cement mortar reduce obviously, when the content of flake particles in manufactured sand is increased or the content of flake particles is 10%. Grey correlation analysis shows that the content of flake particles is the most critical factor affecting cement mortar, and the single particle size of 4.75—9.50 mm is the second factor affecting cement mortar. In order to ensure the performance of cement sand, the total content of flake particles in the manufactured sand and the content of 4.75—9.50 mm flake particles should be strictly controlled.

Key words： manufactured sand flake particles cement mortar fluidity strength pore structure grey correlation analysis

Published: 03 August 2021

CLC number:

TU521.1

Fund:Science and Technology Research and Development Program of China Railway Corporation (P2018G004) and the Program for Changjiang Scholars and Innovative Research Team in University of Ministry of Education of China (IRT_15R29).

About author:: Bentian Yu received his Ph.D. degree in civil engineering from Lanzhou Jiaotong University in 2014. He is currently an associate professor in School of Civil Engineering of Lanzhou Jiaotong University. He has hosted and participated in 10 provincial or ministerial level research projects including National Natural Science Foundation of China, the Natural Science Foundation of Gansu Province. His research interests are high-performance concrete, durability of concrete materials and structures.

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	YU Bentian
	LIU Tong
	WANG Huan
	LI Sheng
	XIE Chao
	SU Lei
	LI Yanlin

Cite this article:

YU Bentian,LIU Tong,WANG Huan, et al. Properties of Cement Mortar with Flake Particle in Manufactured Sand[J]. Materials Reports, 2021, 35(14): 14058-14064.

URL:

http://www.mater-rep.com/EN/10.11896/cldb.20020161 OR http://www.mater-rep.com/EN/Y2021/V35/I14/14058

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