Numerical insights into the effect of ITZ and aggregate strength on concrete properties

Zhao，Haiyang1; Wu，Zhonghuai1; Liu，Ang1; Zhang，Liangchi2,3,4

2022-08-01

10.1016/j.tafmec.2022.103415

THEORETICAL AND APPLIED FRACTURE MECHANICS   影响因子和分区

0167-8442

Mechanical properties of concrete are highly dependent on its components. Consequently, a comprehensive understanding of the effects of aggregate and interfacial transition zone on concrete properties is important to applications. In this paper, a mesoscale investigation on the effects of coarse aggregate and interfacial transition zone strength on mechanical and fracture behaviours of concrete is investigated using discrete element modelling. The results show that the elastic modulus of concrete is insensitive to the strength of ITZ and aggregate, whereas the compressive strength and strain-to-damage highly depend on these two factors. An increase in ITZ/aggregate strength leads to a decrease of cracks in ITZ/aggregates and little change of cracks in mortar. Aggregate size, under certain conditions, can alter the crack growth process and result in distinct crack patterns.

Aggregate Concrete Discrete element modelling Fracture mechanism Interfacial transition zone

EI

英语

通讯

20222312189805

Compressive strength ; Concrete aggregates ; Fracture

Concrete:412 ; Materials Science:951

ENGINEERING

2-s2.0-85131125000

Scopus

1.School of Mechanical and Manufacturing Engineering,University of New South Wales,2052,Australia
2.Shenzhen Key Laboratory of Cross-scale Manufacturing Mechanics,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China
3.SUSTech Institute for Manufacturing Innovation,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China
4.Department of Mechanics and Aerospace Engineering,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China

Zhao，Haiyang,Wu，Zhonghuai,Liu，Ang,et al. Numerical insights into the effect of ITZ and aggregate strength on concrete properties[J]. THEORETICAL AND APPLIED FRACTURE MECHANICS,2022,120.

Zhao，Haiyang,Wu，Zhonghuai,Liu，Ang,&Zhang，Liangchi.(2022).Numerical insights into the effect of ITZ and aggregate strength on concrete properties.THEORETICAL AND APPLIED FRACTURE MECHANICS,120.

Zhao，Haiyang,et al."Numerical insights into the effect of ITZ and aggregate strength on concrete properties".THEORETICAL AND APPLIED FRACTURE MECHANICS 120(2022).