A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Strength and durability of high-performance preplaced aggregate concrete for rapid pavement repair
This study investigated a pavement repair material that utilises preplaced aggregates and SAC-OPC grouting material to effectively and rapidly repair the pavement. Mechanical properties, drying shrinkage properties, corrosion resistance and bonding properties of preplaced aggregate concrete with different aggregate gradation and moulding methods were evaluated. The microstructure of SAC-OPC grouting material was investigated using field emission scanning electron microscopy and X-ray diffraction. The findings of these tests were corroborated with microstructural tests to evaluate the hydration mechanism of SAC-OPC grouting material. The results show that with continuous grading and vibration moulding, the 1-day compressive strength of PAC specimens reached over 80% of their 28-day compressive strength. At 28 days, the shrinkage rate of PAC specimens was 97.5% of the 60-day shrinkage rate, and after 60 days of corrosion resistance testing, the compressive strength loss of PAC specimens was less than 10%. The development of preplaced aggregate with SAC-OPC grouting material is feasible, as they achieved balanced behaviour in terms of workability, high early- and later-age compressive strengths, improved durability, and superior compatibility with the normal concrete. The laboratory findings of this study may serve as a reference for further research on the use of preplaced aggregate concrete in rapid pavement rehabilitation.
Strength and durability of high-performance preplaced aggregate concrete for rapid pavement repair
This study investigated a pavement repair material that utilises preplaced aggregates and SAC-OPC grouting material to effectively and rapidly repair the pavement. Mechanical properties, drying shrinkage properties, corrosion resistance and bonding properties of preplaced aggregate concrete with different aggregate gradation and moulding methods were evaluated. The microstructure of SAC-OPC grouting material was investigated using field emission scanning electron microscopy and X-ray diffraction. The findings of these tests were corroborated with microstructural tests to evaluate the hydration mechanism of SAC-OPC grouting material. The results show that with continuous grading and vibration moulding, the 1-day compressive strength of PAC specimens reached over 80% of their 28-day compressive strength. At 28 days, the shrinkage rate of PAC specimens was 97.5% of the 60-day shrinkage rate, and after 60 days of corrosion resistance testing, the compressive strength loss of PAC specimens was less than 10%. The development of preplaced aggregate with SAC-OPC grouting material is feasible, as they achieved balanced behaviour in terms of workability, high early- and later-age compressive strengths, improved durability, and superior compatibility with the normal concrete. The laboratory findings of this study may serve as a reference for further research on the use of preplaced aggregate concrete in rapid pavement rehabilitation.
Strength and durability of high-performance preplaced aggregate concrete for rapid pavement repair
Zhuang, Hao (author) / Ma, Shibin (author) / Yang, Linsen (author) / Li, Jiyue (author) / Guo, Rui (author) / Wu, Yanran (author) / Ge, Xi (author)
2024-12-31
Article (Journal)
Electronic Resource
English
| BASE | 2024
Response of Functionally Graded Preplaced Aggregate Fibrous Concrete with Superior Impact Strength
| DOAJ | 2022