Effect of carbonated recycled aggregates on the mechanical properties and bonding performance of polyurethane mortar as a repair material DOI Creative Commons

Li‐Jun Wan,

Yuan‐ming Geng, Guang-Zhu Zhang

et al.

Journal of Engineering and Applied Science, Journal Year: 2025, Volume and Issue: 72(1)

Published: March 29, 2025

Abstract Recycled aggregate (RA) made from construction waste has limited application due to its high porosity, numerous cracks, and other disadvantages such as reduced concrete strength when using aggregate). In this paper, carbonated recycled (CRA) was obtained by carbonating aggregate, natural (NA) in polyurethane mortar (PUM) replaced at different ratios. The physical changes pore structure of RA before after carbonation, the mechanical properties (compressive flexural strength) PUM, three-point bending bond performance were systematically investigated. compactness PUM detected ultrasonic velocity (UPV) test. change mechanism microstructure revealed scanning electron microscopy (SEM). results show that replacement rate is 50%, compressive increased 7.32% 15.83%, respectively, 14.19%, all which are greater than increase a 25%. P with decreased, but generated calcium carbonate carbonation treatment can fill surface pores enhance CRA, test pieces same ratio improved compared those RA.

Language: Английский

Optimal multi-walled carbon nanotube dosage for improving the mechanical and thermoelectric characteristics of ultra-high-performance fiber-reinforced concrete DOI
Rongzhen Piao,

Zhengri Cui,

Jae‐Weon Jeong

et al.

Construction and Building Materials, Journal Year: 2025, Volume and Issue: 462, P. 139927 - 139927

Published: Jan. 18, 2025

Language: Английский

Citations

2
Synergistic effect of nickel and graphite powders on the thermoelectric properties of ultra-high-performance concrete containing steel fibers and MWCNTs DOI
Rongzhen Piao,

Zhengri Cui,

Taekgeun Oh

et al.

Cement and Concrete Composites, Journal Year: 2024, Volume and Issue: unknown, P. 105778 - 105778

Published: Sept. 1, 2024

Language: Английский

Citations

7
A novel approach to accelerate the carbonation of γ-C2S under atmospheric pressure: Increasing CO2 dissolution and promoting calcium ion leaching via triethanolamine DOI

Liting Yu,

Bao Lu,

Sun Jin-Feng

et al.

Construction and Building Materials, Journal Year: 2024, Volume and Issue: 450, P. 138719 - 138719

Published: Oct. 18, 2024

Language: Английский

Citations

4
Effect of carbonated recycled aggregates on the mechanical properties and bonding performance of polyurethane mortar as a repair material DOI Creative Commons

Li‐Jun Wan,

Yuan‐ming Geng, Guang-Zhu Zhang

et al.

Journal of Engineering and Applied Science, Journal Year: 2025, Volume and Issue: 72(1)

Published: March 29, 2025

Abstract Recycled aggregate (RA) made from construction waste has limited application due to its high porosity, numerous cracks, and other disadvantages such as reduced concrete strength when using aggregate). In this paper, carbonated recycled (CRA) was obtained by carbonating aggregate, natural (NA) in polyurethane mortar (PUM) replaced at different ratios. The physical changes pore structure of RA before after carbonation, the mechanical properties (compressive flexural strength) PUM, three-point bending bond performance were systematically investigated. compactness PUM detected ultrasonic velocity (UPV) test. change mechanism microstructure revealed scanning electron microscopy (SEM). results show that replacement rate is 50%, compressive increased 7.32% 15.83%, respectively, 14.19%, all which are greater than increase a 25%. P with decreased, but generated calcium carbonate carbonation treatment can fill surface pores enhance CRA, test pieces same ratio improved compared those RA.

Language: Английский

Citations

0