首页|Improving the adsorption of cloud concrete stone porous aggregate to phase change materials by alkali modification

Improving the adsorption of cloud concrete stone porous aggregate to phase change materials by alkali modification

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  • NETL
  • NSTL
  • Elsevier
© 2024In this paper, the pore structure of cloud concrete stone (CCS) was optimized by alkaline hydrothermal treatment to improve its adsorption capacity for phase change materials (PCMs), thus enhancing the heat storage effect of phase change composite aggregates. The results showed that the adsorption rate of CCS modified by alkaline solution for 36 h was 21.49 %, which increased by 30.64 % relative to that without modification. The macroscopic and microscopic morphology showed that the 24-hour modified CCS appeared small cracks in the surface and the internal pores became more numerous. The 48-hour modified CCS appeared exfoliated on the surface and the internal pores and cracks increased. Hydrothermal treatment changes the pore structure of CCS, making it more conducive to the adsorption of PCM.

Alkali modified aggregateCloud concrete stoneMicrostructurePhase change materialPore characteristics

Zhang D.、Yang C.、Liang W.

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School of Civil Engineering Xiangtan University

School of Civil Engineering Xiangtan UniversitySchool of Civil Engineering Xiangtan University||School of Civil Engineering Southeast University||

3rd Construction Co. Ltd. of China Construction 5th Engineering Bureau

2025

10.1016/j.matlet.2024.137717

Materials letters

Materials letters

SCI
ISSN：0167-577X
年,卷(期)：2025.380(Feb.1)
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