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Volume 13
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10.3390/coatings13091571
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Article

Coupling Effect of Expansion Agent and Internal Curing Aggregate on Shrinkage of High-Modulus Ultra-High-Performance Concrete

by
Min Zhou
1,
Tengyu Yang
1,
Jinhui Li
2,*,
Bing Qiu
1,
Wenjun Qiu
1,
Dongdong Chen
3,
Baiyun Li
1,
Benan Shu
1,
Changsheng Zhou
3,
Lixian Guo
1,
Zi Yu
2 and
Yongling Li
1
1
Foshan Transportation Science and Technology Co., Ltd., Foshan 528000, China
2
College of Materials Science and Engineering, Wuhan Textile University, Wuhan 430200, China
3
School of Materials and Science Engineering, Wuhan University of Technology, Wuhan 430070, China
*
Author to whom correspondence should be addressed.
Coatings 2023, 13(9), 1571; https://doi.org/10.3390/coatings13091571
Submission received: 10 August 2023 / Revised: 4 September 2023 / Accepted: 6 September 2023 / Published: 8 September 2023
(This article belongs to the Special Issue Novel Green Pavement Materials and Coatings)
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Abstract

In the realm of bridge structural engineering, it is customary to meticulously contemplate the material’s strength and rigidity attributes during the dimensioning phase. In recent years, there has been a burgeoning interest in employing Ultrahigh-Performance Concrete (abbreviated as UHPC) for the construction of bridge decks and wet joints. However, the large self-shrinkage of UHPC can easily lead to shrinkage cracking and affect its service life. This study delves into the utilization of a blend of basalt coarse aggregate and high-modulus aggregate (HMA) in the formulation of Ultrahigh-Performance Concrete (UHPC) with the objectives of achieving exceptional strength (>180 MPa), superior modulus of elasticity (>56 GPa), and synergistic effect of using prewetted internal curing aggregate (ICA), metallurgical ore sand (MOS), and calcium–magnesium composite-based expansion agent (EA) to reduce the shrinkage of UHPC. Furthermore, the mechanical properties, shrinkage, hydration process, and microstructure of UHPC prepared with EA and ICA were studied. The results show that UHPC prepared with both 3% EA and 20% ICA had the optimal volume stability (the shrinkage was only 273 με at 180 d). In contrast, the 180 d shrinkage of UHPC with 3% EA and 20% ICA separately was 287 με and 373 με, respectively. In addition, the incorporation of EA and ICA can effectively improve the flexural strength of UHPC, although it affects the compressive strength and modulus of elasticity of UHPC (small decrease).
Keywords: UHPC; shrinkage; mechanical properties; expansion agent; internal curing aggregate; microstructure UHPC; shrinkage; mechanical properties; expansion agent; internal curing aggregate; microstructure

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MDPI and ACS Style

Zhou, M.; Yang, T.; Li, J.; Qiu, B.; Qiu, W.; Chen, D.; Li, B.; Shu, B.; Zhou, C.; Guo, L.; et al. Coupling Effect of Expansion Agent and Internal Curing Aggregate on Shrinkage of High-Modulus Ultra-High-Performance Concrete. Coatings 2023, 13, 1571. https://doi.org/10.3390/coatings13091571

AMA Style

Zhou M, Yang T, Li J, Qiu B, Qiu W, Chen D, Li B, Shu B, Zhou C, Guo L, et al. Coupling Effect of Expansion Agent and Internal Curing Aggregate on Shrinkage of High-Modulus Ultra-High-Performance Concrete. Coatings. 2023; 13(9):1571. https://doi.org/10.3390/coatings13091571

Chicago/Turabian Style

Zhou, Min, Tengyu Yang, Jinhui Li, Bing Qiu, Wenjun Qiu, Dongdong Chen, Baiyun Li, Benan Shu, Changsheng Zhou, Lixian Guo, and et al. 2023. "Coupling Effect of Expansion Agent and Internal Curing Aggregate on Shrinkage of High-Modulus Ultra-High-Performance Concrete" Coatings 13, no. 9: 1571. https://doi.org/10.3390/coatings13091571

APA Style

Zhou, M., Yang, T., Li, J., Qiu, B., Qiu, W., Chen, D., Li, B., Shu, B., Zhou, C., Guo, L., Yu, Z., & Li, Y. (2023). Coupling Effect of Expansion Agent and Internal Curing Aggregate on Shrinkage of High-Modulus Ultra-High-Performance Concrete. Coatings, 13(9), 1571. https://doi.org/10.3390/coatings13091571

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