Experimental study on thermal performance of ultra-high performance concrete with coarse aggregates at high temperature

Xue, C. and Yu, M. and Xu, H. and Xu, L. and Saafi, M. and Ye, J. (2022) Experimental study on thermal performance of ultra-high performance concrete with coarse aggregates at high temperature. Construction and Building Materials, 314 (Part A). ISSN 0950-0618

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Abstract

Ultra-high performance concrete (UHPC) exhibits superior mechanical and durability performance with very high compressive strength. Compared with ordinary concrete, it is more environmentally friendly and has the great potential to be a practical solution to improve the sustainability of infrastructure. This study focuses on examining thermal properties of UHPC with coarse aggregates (CA-UHPC) subjected to temperature ranged from 20 °C ∼ 900 °C, including changes in macro and micro morphology before and after high temperatures, thermal conductivity, mass loss, specific heat and thermal expansion. The effects of high temperature, coarse aggregate and steel fiber content on the thermal performance of the material will be evaluated both qualitatively and quantitatively. Experimental results show that high temperature greatly affects thermal properties of CA-UHPC. Coarse aggregates also have a considerable influence on the thermal properties. Steel fibers, however, have little effect on the thermal properties. Based on the test results, meso calculation formulas are proposed to predict the thermal properties, which can be used in the design of structural components made of CA-UHPC.

Item Type:
Journal Article
Journal or Publication Title:
Construction and Building Materials
Additional Information:
This is the author’s version of a work that was accepted for publication in Construction and Building Materials. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Construction and Building Materials, 314, Part A, 2021 DOI: 10.1016/j.conbuildmat.2021.125585
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2500
Subjects:
ID Code:
162656
Deposited By:
Deposited On:
25 Nov 2021 11:44
Refereed?:
Yes
Published?:
Published
Last Modified:
30 Nov 2021 20:41