Journal
CONSTRUCTION AND BUILDING MATERIALS
Volume 273, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2020.121714
Keywords
Microencapsulated phase change material; Ultra-high performance concrete; Mechanical properties; Thermal performance; Microstructure
Categories
Funding
- National Key RAMP
- D Program of China [2017YFB0309901]
Ask authors/readers for more resources
The novel MPCM-UHPC composite material exhibits excellent thermal performance and mechanical properties, but the incorporation of MPCM has a negative effect on the mechanical properties and autogenous shrinkage of the material.
A novel structural-functional integrated concrete (MPCM-UHPC) with excellent mechanical properties and thermal storage capacity was developed by incorporating microencapsulated phase change material (MPCM) into ultra-high performance concrete (UHPC). The indoor tests were performed to determine the thermal performance of MPCM-UHPC. Mechanical properties and autogenous shrinkage strain of MPCM-UHPC were evaluated. The microstructure, thermal stability, chemical structure and crystal structure of the composite material were investigated by mercury intrusion porosimetry (MIP), scanning electron microscope (SEM), thermal gravimetric analyzer (TGA), Fourier transformation infrared spectroscope (FTIR) and X-ray diffraction (XRD). The results show that no chemically phenomenological interaction between MPCM and cementitious components occurs in the hydration process. However, the incorporation of MPCM increased air voids content in cementitious matrix, thus inducing harmful effect on the mechanical properties and autogenous shrinkage of MPCM-UHPC. From indoor performance test, the surface temperature of UHPC with 10 wt% MPCM was 3.9 degrees C lower than that of control group. Compressive tests results show that it possesses a considerable compressive strength of 78 MPa. Therefore, the MPCM-UHPC composite is a promising structural-functional integrated building material. (C) 2020 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available