Fracture mechanical properties and interfacial characteristics of engineered cementitious composites containing coarse aggregate

Xie, Lei1,2; Sun, Xinjian1,2; Yu, Zhenpeng3; Lian, Huiheng4; Duan, Junbang5; Zhang, Fenghua5; Zhao, Wendong5

2024-08-22

10.1016/j.engfracmech.2024.110271

ENGINEERING FRACTURE MECHANICS   影响因子和分区

0013-7944

1873-7315

Engineered cementitious composites (ECC) have significantly high deformability, but their application in the field of engineered crack prevention is severely limited by their high shrinkage and high cost. To address this issue, a safer and more economical ECC was designed in this paper by adding coarse aggregate (CA) into the ECC matrix (i.e., ECC-CA). Then, experimental studies on the fracture properties of ECC-CA were carried out from both macroscopic and microscopic perspectives, by considering four CA mass contents and three CA particle sizes. The results show that ECC-CA maintains good mechanical properties and deformation capacity as ECC. Its crack mouth opening displacement corresponding to the largest particle size (13 -17 mm) and the largest mass content (30 %) is equivalent to 47.8 % of that of ECC, which is about 40 times higher than that of conventional concrete. Further, the interfacial transition zone characteristics between each phase medium and matrix were analyzed in ECC-CA for the purpose of clarifying the crack initiation and evolution trends, elucidating the influence of CA on the fracture mechanism of ECCCA (i.e., fiber cage effect) based on both macroscopic performance and microscopic characteristics.

Engineered cementitious composites Coarse aggregate Fracture performance Microstructure Mechanism analysis

SCI ; EI

英语

其他

National Natural Science Foundation of China[52379127]

Mechanics

Mechanics

WOS:001266468100001

PERGAMON-ELSEVIER SCIENCE LTD

20242816670674

Aggregates ; Cracks ; Fracture ; Particle size analysis ; Shrinkage

Highway Engineering:406 ; Concrete Reinforcements:412.2 ; Materials Science:951

ENGINEERING

Web of Science

1.Qinghai Univ, Sch Civil Engn & Water Resources, Xining 810016, Peoples R China
2.Lab Ecol Protect & High Qual Dev Upper Yellow Rive, Xining 810016, Qinghai, Peoples R China
3.Shanghai Univ, Sch Mech & Engn Sci, Dept Civil Engn, Shanghai 200444, Peoples R China
4.Southern Univ Sci & Technol, Dept Ocean Sci & Engn, Shenzhen 518000, Peoples R China
5.Huanghe Hydropower Dev Co Ltd, Xining 810016, Peoples R China

Xie, Lei,Sun, Xinjian,Yu, Zhenpeng,et al. Fracture mechanical properties and interfacial characteristics of engineered cementitious composites containing coarse aggregate[J]. ENGINEERING FRACTURE MECHANICS,2024,307.

Xie, Lei.,Sun, Xinjian.,Yu, Zhenpeng.,Lian, Huiheng.,Duan, Junbang.,...&Zhao, Wendong.(2024).Fracture mechanical properties and interfacial characteristics of engineered cementitious composites containing coarse aggregate.ENGINEERING FRACTURE MECHANICS,307.

Xie, Lei,et al."Fracture mechanical properties and interfacial characteristics of engineered cementitious composites containing coarse aggregate".ENGINEERING FRACTURE MECHANICS 307(2024).