Rights statement: 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
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Available under license: CC BY-NC-ND: Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - Experimental study on thermal performance of ultra-high performance concrete with coarse aggregates at high temperature
AU - Xue, C.
AU - Yu, M.
AU - Xu, H.
AU - Xu, L.
AU - Saafi, M.
AU - Ye, J.
N1 - 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
PY - 2022/1/3
Y1 - 2022/1/3
N2 - 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.
AB - 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.
KW - CA-UHPC
KW - Coarse aggregates
KW - High temperature
KW - Steel fibers
KW - Thermal parameters
KW - Aggregates
KW - Compressive strength
KW - High performance concrete
KW - Specific heat
KW - Thermal conductivity
KW - Thermal expansion
KW - CA-ultra-high performance concrete
KW - Durability performance
KW - Highest temperature
KW - Macro morphology
KW - Mechanical performance
KW - Ordinary concretes
KW - Practical solutions
KW - Thermal Performance
U2 - 10.1016/j.conbuildmat.2021.125585
DO - 10.1016/j.conbuildmat.2021.125585
M3 - Journal article
VL - 314
JO - Construction and Building Materials
JF - Construction and Building Materials
SN - 0950-0618
IS - Part A
M1 - 125585
ER -