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Compressive stress–strain relationship of steel fiber-reinforced reactive powder concrete after exposure to elevated temperatures
Highlights ► We measure the complete compressive stress–strain curves of RPC exposed to 20–900°C. ► We analyze the changes of mechanical properties with the increasing temperature. ► The effect of steel fiber content on compressive stress–strain curves is analyzed. ► We establish the equations between the mechanical properties and the temperatures. ► The constitutive equations applied to the heated and unheated RPC are proposed.
Abstract An experimental research is performed on the complete compressive stress–strain relationships for reactive powder concrete (RPC) with various steel fiber contents after exposure to 20–900°C. The steel fiber volume dosage is 1%, 2% and 3%. The results indicate that the compressive strength and elastic modulus of RPC increase at first, then decrease with the increasing temperature, and the loss of elastic modulus is quicker than the compressive strength. The peak strain and ultimate strain reach peaks at 600°C and 700°C respectively, and they increase exponentially before the peak points, but decrease linearly after the peak points. Based on the experiment results, the compressive stress–strain constitutive equations applicable to the unheated and heated RPC are proposed, which provide a valuable reference for future industrial applications and design.
Compressive stress–strain relationship of steel fiber-reinforced reactive powder concrete after exposure to elevated temperatures
Highlights ► We measure the complete compressive stress–strain curves of RPC exposed to 20–900°C. ► We analyze the changes of mechanical properties with the increasing temperature. ► The effect of steel fiber content on compressive stress–strain curves is analyzed. ► We establish the equations between the mechanical properties and the temperatures. ► The constitutive equations applied to the heated and unheated RPC are proposed.
Abstract An experimental research is performed on the complete compressive stress–strain relationships for reactive powder concrete (RPC) with various steel fiber contents after exposure to 20–900°C. The steel fiber volume dosage is 1%, 2% and 3%. The results indicate that the compressive strength and elastic modulus of RPC increase at first, then decrease with the increasing temperature, and the loss of elastic modulus is quicker than the compressive strength. The peak strain and ultimate strain reach peaks at 600°C and 700°C respectively, and they increase exponentially before the peak points, but decrease linearly after the peak points. Based on the experiment results, the compressive stress–strain constitutive equations applicable to the unheated and heated RPC are proposed, which provide a valuable reference for future industrial applications and design.
Compressive stress–strain relationship of steel fiber-reinforced reactive powder concrete after exposure to elevated temperatures
Zheng, Wenzhong (author) / Li, Haiyan (author) / Wang, Ying (author)
Construction and Building Materials ; 35 ; 931-940
2012-05-18
10 pages
Article (Journal)
Electronic Resource
English
| British Library Online Contents | 2012
| British Library Online Contents | 2012
| British Library Online Contents | 2015