Rate-dependent damage–constitutive coupling and CT-quantified fibre–matrix interaction in micro-fibre-reinforced recycled cementitious composites
Source abstract
Abstract
The rate-dependent damage and constitutive behaviour of micro-fibre-reinforced recycled cementitious composites (MF-RCC) were systematically investigated under high strain rates (40–380 s−1) using Split Hopkinson Pressure Bar (SHPB) tests combined with in-situ X-ray computed tomography (CT). A secant-stiffness-based damage variable was defined, and a dynamic damage – constitutive model incorporating a Dynamic Fibre Influence Factor (DFIF) was developed to characterise the coupled effect of strain rate and fibre content. The model reproduced the nonlinear responses across pre- and post-peak stages with high accuracy. CT quantification revealed that increasing fibre content effectively reduced pore volume fraction and crack connectivity, confirming the fibre-induced suppression of damage evolution. The results show that 2.0% fibre content at 377.6 s−1 enhanced peak stress and ultimate strain by 11.0% and 65.0%, respectively, whereas excessive fibres (2.5%) led to mild deterioration due to non-uniform dispersion. The integrated testing–modelling-CT framework provides a mechanism-based approach to predict the dynamic response and microstructural damage of MF-RCC, offering insights for fracture-resistant design of sustainable cementitious materials.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Innovative concrete reinforcement materials · Recycled Aggregate Concrete Performance · Structural Behavior of Reinforced Concrete
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Shanghai University
Tongji University
Funding
National Natural Science Foundation of China · Natural Science Foundation of Shanghai Municipality · China Postdoctoral Science Foundation · Key Projects of Science & Technology Pillar Program of Henan Province
References (67)
Show source-provided references
1. 10.1016/j.resconrec.2021.10556510.1016/j.resconrec.2021.105565 ↗
2. 10.1016/j.cemconcomp.2024.10544210.1016/j.cemconcomp.2024.105442 ↗
3. 10.1016/j.conbuildmat.2020.11899710.1016/j.conbuildmat.2020.118997 ↗
4. 10.1016/j.conbuildmat.2018.03.24010.1016/j.conbuildmat.2018.03.240 ↗
5. 10.1016/j.conbuildmat.2024.13972610.1016/j.conbuildmat.2024.139726 ↗
6. 10.1016/j.cemconcomp.2017.04.01110.1016/j.cemconcomp.2017.04.011 ↗
7. 10.1016/j.cemconcomp.2023.10504810.1016/j.cemconcomp.2023.105048 ↗
8. 10.1016/j.cemconcomp.2022.10467810.1016/j.cemconcomp.2022.104678 ↗
9. 10.1016/j.cemconcomp.2019.10335310.1016/j.cemconcomp.2019.103353 ↗
10. 10.1016/j.cemconcomp.2019.05.01310.1016/j.cemconcomp.2019.05.013 ↗
11. 10.1016/j.cemconcomp.2017.08.01610.1016/j.cemconcomp.2017.08.016 ↗
12. 10.1016/j.cemconcomp.2019.10344610.1016/j.cemconcomp.2019.103446 ↗
13. 10.1016/j.conbuildmat.2025.14019010.1016/j.conbuildmat.2025.140190 ↗
14. 10.1016/j.engstruct.2024.11885610.1016/j.engstruct.2024.118856 ↗
15. 10.1016/j.cemconcomp.2025.10598810.1016/j.cemconcomp.2025.105988 ↗
16. 10.1016/j.engfracmech.2024.11025410.1016/j.engfracmech.2024.110254 ↗
17. 10.1016/j.engstruct.2022.11391110.1016/j.engstruct.2022.113911 ↗
18. 10.1016/j.istruc.2022.07.03010.1016/j.istruc.2022.07.030 ↗
19. 10.1016/j.conbuildmat.2023.13035810.1016/j.conbuildmat.2023.130358 ↗
20. 10.1016/j.conbuildmat.2021.12373210.1016/j.conbuildmat.2021.123732 ↗
21. 10.1016/j.conbuildmat.2020.11801010.1016/j.conbuildmat.2020.118010 ↗
22. 10.1016/j.engfracmech.2020.10697410.1016/j.engfracmech.2020.106974 ↗
23. 10.1016/j.compstruct.2019.04.02110.1016/j.compstruct.2019.04.021 ↗
24. 10.1016/j.compstruct.2019.11181010.1016/j.compstruct.2019.111810 ↗
25. 10.1016/j.compstruct.2020.11268510.1016/j.compstruct.2020.112685 ↗
26. 10.1016/j.conbuildmat.2012.05.03110.1016/j.conbuildmat.2012.05.031 ↗
27. Carreira DJ, Chu KH. Stress-strain relationship for plain concrete in compression. Aci J. 1985;82:797–804.
28. Ezeldin AS, Balaguru PN. Normal and high-strength fiber-reinforced concrete under compression. J Mater Civ Eng. 1992;4(4):415–429.10.1061/(ASCE)0899-1561(1992)4:4(415) ↗
29. Peng JL, Du T, Zhao TS, et al. Stress-strain relationship model of recycled concrete based on strength and replacement rate of recycled coarse aggregate. J Mater Civ Eng. 2019;31(9):04019189.10.1061/(ASCE)MT.1943-5533.0002847 ↗
30. 10.1016/j.conbuildmat.2018.11.18110.1016/j.conbuildmat.2018.11.181 ↗
31. 10.1016/0029-5493(84)90169-910.1016/0029-5493(84)90169-9 ↗
32. 10.1680/jmacr.23.0002810.1680/jmacr.23.00028 ↗
33. Liu DQ, Li D, Zhang XY. A new strain softening damage constitutive model for rocks based on defects growth. Chin J Rock Mech Eng. 2017;36:3902–3909.
34. 10.1016/j.engstruct.2017.10.00710.1016/j.engstruct.2017.10.007 ↗
35. 10.1016/j.jobe.2024.10938510.1016/j.jobe.2024.109385 ↗
36. 10.1016/j.cemconcomp.2024.10572010.1016/j.cemconcomp.2024.105720 ↗
37. 10.1016/j.jobe.2022.10408710.1016/j.jobe.2022.104087 ↗
38. 10.1016/j.ijsolstr.2015.05.00210.1016/j.ijsolstr.2015.05.002 ↗
39. 10.1016/j.ijimpeng.2016.06.00910.1016/j.ijimpeng.2016.06.009 ↗
40. 10.1016/j.ijimpeng.2024.10518810.1016/j.ijimpeng.2024.105188 ↗
41. 10.1016/j.cemconcomp.2023.10527010.1016/j.cemconcomp.2023.105270 ↗
42. 10.1016/j.cma.2022.11555910.1016/j.cma.2022.115559 ↗
43. 10.1016/j.compstruct.2023.11676210.1016/j.compstruct.2023.116762 ↗
44. 10.1016/j.ijmecsci.2023.10827010.1016/j.ijmecsci.2023.108270 ↗
45. 10.1016/j.addma.2025.10501410.1016/j.addma.2025.105014 ↗
46. 10.1016/j.jobe.2025.11329810.1016/j.jobe.2025.113298 ↗
47. 10.1016/j.conbuildmat.2024.13536910.1016/j.conbuildmat.2024.135369 ↗
48. 10.1016/j.jobe.2025.11316710.1016/j.jobe.2025.113167 ↗
49. 10.1016/j.conbuildmat.2025.14504310.1016/j.conbuildmat.2025.145043 ↗
50. 10.1016/j.conbuildmat.2025.14241610.1016/j.conbuildmat.2025.142416 ↗
51. 10.1016/j.cemconcomp.2022.10466110.1016/j.cemconcomp.2022.104661 ↗
52. 10.1016/j.cemconcomp.2022.10459710.1016/j.cemconcomp.2022.104597 ↗
53. 10.1016/j.cemconres.2024.10745710.1016/j.cemconres.2024.107457 ↗
54. 10.1016/j.conbuildmat.2017.02.09410.1016/j.conbuildmat.2017.02.094 ↗
55. 10.1016/j.jobe.2023.10599110.1016/j.jobe.2023.105991 ↗
56. 10.1016/j.cemconcomp.2025.10611810.1016/j.cemconcomp.2025.106118 ↗
57. 10.1016/j.conbuildmat.2025.14294710.1016/j.conbuildmat.2025.142947 ↗
58. Hognestad E. Study of combined bending and axial load in reinforced concrete members. Bulletin: University of Illinois, Engineering Experiment Station. 1951.
59. Guo ZH. Strength and stress-strain model of concrete: theory and applications. Beijing, China: China Architecture and Building Press; 2004.
60. 10.1016/j.cemconres.2015.01.01410.1016/j.cemconres.2015.01.014 ↗
61. 10.1016/j.compositesb.2020.10777610.1016/j.compositesb.2020.107776 ↗
62. 10.1016/j.cemconres.2013.05.00810.1016/j.cemconres.2013.05.008 ↗
63. 10.1016/j.compositesb.2025.11317210.1016/j.compositesb.2025.113172 ↗
64. 10.1016/j.conbuildmat.2025.14276110.1016/j.conbuildmat.2025.142761 ↗
65. 10.1016/j.cemconcomp.2025.10616110.1016/j.cemconcomp.2025.106161 ↗
66. 10.1016/j.conbuildmat.2025.14094110.1016/j.conbuildmat.2025.140941 ↗
67. 10.1016/j.cemconres.2025.10811510.1016/j.cemconres.2025.108115 ↗