Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The Compressive Strength of Ultra-high Performance Concrete at Elevated Temperatures
Ultra-high performance concrete (UHPC) has significant strength and performance advantages for structural applications that can lead to thinner and lighter structures, but one drawback is that UHPC can be affected by explosive spalling at elevated temperatures. Synthetic fibres (e.g. polyvinyl alcohol (PVA) and polypropylene (PP)) are commonly added to help mitigate explosive spalling. Although this practice is common, most of the previous research efforts focused on the residual strength of UHPC after exposure to elevated temperatures. Research is lacking in the performance of UHPC under simultaneous load and heat effects. This paper presents compressive strength test results at steady-state temperatures (25, 300, 400, and 500 °C), along with residual compressive strength tests after exposure to 500 °C. The results showed the UHPC reinforced with 2% by volume of PVA fibres withstood exposure to elevated temperature without explosive spalling. The compressive strength gradually reduced with the increase of the elevated temperatures. At 25, 300, 400, and 500 °C, the average compressive strength was found to be 156, 124, 118, and 83 MPa, respectively. The retained strength ratio at 300, 400, and 500 °C was found to be 0.7930, 0.7544, and 0.5315. The residual compressive strength after exposure to 500 °C was 95 MPa which is slightly higher than the steady-state compressive strength.
The Compressive Strength of Ultra-high Performance Concrete at Elevated Temperatures
Ultra-high performance concrete (UHPC) has significant strength and performance advantages for structural applications that can lead to thinner and lighter structures, but one drawback is that UHPC can be affected by explosive spalling at elevated temperatures. Synthetic fibres (e.g. polyvinyl alcohol (PVA) and polypropylene (PP)) are commonly added to help mitigate explosive spalling. Although this practice is common, most of the previous research efforts focused on the residual strength of UHPC after exposure to elevated temperatures. Research is lacking in the performance of UHPC under simultaneous load and heat effects. This paper presents compressive strength test results at steady-state temperatures (25, 300, 400, and 500 °C), along with residual compressive strength tests after exposure to 500 °C. The results showed the UHPC reinforced with 2% by volume of PVA fibres withstood exposure to elevated temperature without explosive spalling. The compressive strength gradually reduced with the increase of the elevated temperatures. At 25, 300, 400, and 500 °C, the average compressive strength was found to be 156, 124, 118, and 83 MPa, respectively. The retained strength ratio at 300, 400, and 500 °C was found to be 0.7930, 0.7544, and 0.5315. The residual compressive strength after exposure to 500 °C was 95 MPa which is slightly higher than the steady-state compressive strength.
The Compressive Strength of Ultra-high Performance Concrete at Elevated Temperatures
Lecture Notes in Civil Engineering
Gupta, Rishi (Herausgeber:in) / Sun, Min (Herausgeber:in) / Brzev, Svetlana (Herausgeber:in) / Alam, M. Shahria (Herausgeber:in) / Ng, Kelvin Tsun Wai (Herausgeber:in) / Li, Jianbing (Herausgeber:in) / El Damatty, Ashraf (Herausgeber:in) / Lim, Clark (Herausgeber:in) / MacDougall, Branna (Autor:in) / Hajiloo, Hamzeh (Autor:in)
Canadian Society of Civil Engineering Annual Conference ; 2022 ; Whistler, BC, BC, Canada
Proceedings of the Canadian Society of Civil Engineering Annual Conference 2022 ; Kapitel: 63 ; 895-906
13.01.2024
12 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
Compressive Strength Relationships for Concrete under Elevated Temperatures
| British Library Online Contents | 2010
Compressive Strength Relationships for Concrete under Elevated Temperatures
| Online Contents | 2010
Compressive strength of concrete block masonry at elevated temperatures
| British Library Conference Proceedings | 2010
Compressive Strength of FRP-Confined Concrete at Elevated Temperatures
| British Library Online Contents | 2008