Research on preparation and properties of C-S-H /PEG1000 phase change composite

Research on preparation and properties of C-S-H /PEG1000 phase change composite

Chen, Chen (Southeast University, China)
Zheng, Qi (Southeast University, China)
Jiang, Jinyang (Southeast University, China)

2021-04-29

In this paper, composite material C-S-H/PEG1000 was prepared by multi-scale porous material C-S-H as support and phase change material (PCM) PEG1000 by melt blending, so that it can reduce hydration heat of cementitious system utilizing the characteristics of releasing and storing energy of PCM. TEM, IR, DSC-Tg, BET, MIP and various other characterization methods were used to discuss the feasibility of C-S-H as carrier and investigate the morphology, pore structure and stability of the C-S-H/PEG1000 composite. The change of hydration heat and feathers of pore structure as while as its effect on compressive strength were also tested when the composite was added into the cementitious system. Study shows that the PEG1000 can be well embedded into the hollow inside space of C-S-H to form dense blocks in the form of physical adsorption, with good bonding state and thermal stability, which can decrease heat releasing rate and total heat of the hydration process in cementitious system. The early strength was pretty influenced with different addition of C-S-H/PEG1000, however, the later strength was improved.

thermal stability
calcium silicate hydrate
phase change material composite
pore structure
hydration heat

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Conference proceedings

conference paper

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