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A platform for research: civil engineering, architecture and urbanism
Autogenous self-healing properties of cement-stabilized macadam after microcracking
Highlights A control model for microcracking degree was established based on RSM. The changes during the healing process were characterized quantitatively. The microcracking degree had a more significant effect on healing characteristics. CSM possesses good self-healing properties after precracking.
Abstract Microcracking techniques can be applied to reduce the shrinkage stress of cement-stabilized macadam (CSM) and prevent cracking of the base course. Meanwhile, the microcracks will gradually heal without serious impact on the pavement during the base curing. In this study, a control model for microcracking degree under the coupling conditions of microcracking load, microcracking time and material properties was established according to the response surface method (RSM). Then specimens with ten working conditions were produced and tested to analyze the effects of microcracking time and degree on the healing of mechanical properties and mesoscopic structure, and the changes during the healing process were characterized quantitatively. The results showed that the degree of microcracking had a more significant effect on healing characteristics compared with the microcracking time. Microcracking was best controlled at 40%, and microcracking at 2 days of curing was relatively optimal. In addition, the final product coverage of the specimens with the microcracking degrees (30%, 40%, 50%) could exceed 90%. The analysis indicates that CSM possesses good self-healing properties after precracking.
Autogenous self-healing properties of cement-stabilized macadam after microcracking
Highlights A control model for microcracking degree was established based on RSM. The changes during the healing process were characterized quantitatively. The microcracking degree had a more significant effect on healing characteristics. CSM possesses good self-healing properties after precracking.
Abstract Microcracking techniques can be applied to reduce the shrinkage stress of cement-stabilized macadam (CSM) and prevent cracking of the base course. Meanwhile, the microcracks will gradually heal without serious impact on the pavement during the base curing. In this study, a control model for microcracking degree under the coupling conditions of microcracking load, microcracking time and material properties was established according to the response surface method (RSM). Then specimens with ten working conditions were produced and tested to analyze the effects of microcracking time and degree on the healing of mechanical properties and mesoscopic structure, and the changes during the healing process were characterized quantitatively. The results showed that the degree of microcracking had a more significant effect on healing characteristics compared with the microcracking time. Microcracking was best controlled at 40%, and microcracking at 2 days of curing was relatively optimal. In addition, the final product coverage of the specimens with the microcracking degrees (30%, 40%, 50%) could exceed 90%. The analysis indicates that CSM possesses good self-healing properties after precracking.
Autogenous self-healing properties of cement-stabilized macadam after microcracking
He, Miao (author) / Yu, Zhonghui (author) / Ma, Shibin (author) / Kang, Aizhong (author) / Zhang, Jing (author)
2020-11-13
Article (Journal)
Electronic Resource
English
Remixing regenerated cement stabilized macadam base material and cement stabilized macadam base
| European Patent Office | 2023