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Cited by 4Phase Change Materials ResearchConcrete and Cement Materials ResearchInnovative concrete reinforcement materials

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Experimental Investigation on Physical and Mechanical Behaviors of Paraffin Microcapsule Phase-Change Energy-Storage Concrete

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Wang, Dongxue, Qin, Zipeng, Liu, Shixing, Chen, Lefeng, Chen, Guoxun, Xu, Erjin, Zhang, Liangbin, Tian, Yan, Liu, Zhengzheng, Li, Yifan, Lei, Saixuan, Pan, Jiayi, Qiu, Peisheng, Zhou, Xu·2025·Buildings
DOI 10.3390/buildings15111907
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Abstract

Phase-change materials (PCMs) are gradually being applied in the field of building energy conservation due to their ability to absorb and release heat through phase changes within a specific temperature range. This study prepared a paraffin-microencapsulated phase-change aggregate (PCA) and used the equal volume sand replacement method to replace standard sand with PCA under a fixed water–cement ratio and curing conditions. Five sets of concrete specimens with varying PCA content were designed and tested for their apparent densities, compressive strengths, water absorptions, thermal conductivities, and microstructures. The experimental results show that the apparent density, compressive strength, ultrasonic velocity, and thermal conductivity of phase-change energy-storage concrete (PCC) gradually decrease with the increasing PCA content. Its apparent density, compressive strength, ultrasonic velocity, and thermal conductivity all reach their minimum values when the PCA content reaches 40%; minimum values are 2.07 g/cm3, 42.461 MPa (56 days), 8.93 km/s, and 1.43 W/(m·K), respectively. The water-absorption rate of PCC specimens exhibits non monotonic response characteristics with the variation of PCA dosage. This study can provide a theoretical basis for the preparation of PCCs by the PCA method.

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Metadata

Authors
Wang, D., Qin, Z., Liu, S., Chen, L., Chen, G., Xu, E., Zhang, L., Tian, Y., Liu, Z., Li, Y., Lei, S., Pan, J., Qiu, P., & Zhou, X.
Affiliations
  • Zhejiang University of Water Resource and Electric Power (CN)
  • Zhejiang Hydropower Construction and Installation Co., Ltd., Hangzhou 310051, China
  • Wenzhou Water Conservancy Construction Management Center, Wenzhou 325608, China
Corresponding author
Qin, Zipeng
ORCID
Venue
Buildings
Publisher
MDPI AG
Published
2025-06-01
Volume
15
Issue
11
Pages
1907
ISSN
2075-5309 (ISSN-L)
DOI
10.3390/buildings15111907
OpenAlex
W4410966465
Cited by
4
References
31
Citations by year
2026: 4
FWCI
1.09
Type
journal article
Language
en
Open access
Licence
Locations
  • Buildings (publishedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • Nanxun Scholars Program of ZJWEU (RC2024011063, 202311481006)
  • College Student Innovation and Entrepreneurship Training Program Project of ZJWEU (RC2024011063, 202311481006)
Topics
  • Physical Sciences › Engineering › Mechanical Engineering › Phase Change Materials Research
  • Physical Sciences › Engineering › Civil and Structural Engineering › Concrete and Cement Materials Research
  • Physical Sciences › Engineering › Civil and Structural Engineering › Innovative concrete reinforcement materials
Keywords
paraffin microcapsules, phase change materials, compressive strength, thermal conductivity, water absorption, ultrasonic velocity, apparent density, microstructure, building energy conservation

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