HU Qiang,LI Jiacheng,CHEN Yuliang,et al.Experimental Study on Mechanical Properties of Coral Seawater Sea Sand Concrete after High Temperature[J].Journal of Disaster Prevention and Mitigation Engineering,2024,44(03):544-550.
HU Qiang,LI Jiacheng,CHEN Yuliang,et al.Experimental Study on Mechanical Properties of Coral Seawater Sea Sand Concrete after High Temperature[J].Journal of Disaster Prevention and Mitigation Engineering,2024,44(03):544-550. DOI: 10.13409/j.cnki.jdpme.20230305001.
Experimental Study on Mechanical Properties of Coral Seawater Sea Sand Concrete after High Temperature
To study the mechanical properties of Coral Seawater Sea Sand Concrete (CSSC) after exposure to high temperatures
axial compression and static compression elastic modulus tests were conducted on 30 CSSC specimens at room and high temperatures. The axial compression failure patterns and apparent changes of the specimens after exposure to high temperatures were observed
and parameters such as the complete stress-strain behavior under axial compression
elastic modulus
and weight loss rate were obtained. In conjunction with an in-depth analysis of the mechanisms of microstructural changes in CSSC after exposure to high temperatures
the study explored the influence of fire temperature on CSSC's mechanical properties and revealed the degradation mechanism of these properties after high-temperature exposure. The results demonstrated a progressive decline in the mechanical properties of CSSC as the fire temperature increased. At 200 ℃
compared to specimens at room temperature
the axial compressive strength and elastic modulus of CSSC decreased by 26.52% and 6.19%
respectively
indicating good mechanical properties. At 400 ℃
the elastic modulus of CSSC decreased rapidly
with a loss of 65.48%
but its axial compressive strength increased by 6.4% compared to specimens at 200 ℃. At 600 ℃
the axial compressive strength of CSSC exhibited a rapid decline
with a strength loss rate of 66.74%. The CSSC was severely damaged at 800 ℃
making it impossible to measure its effective elastic modulus.
Li X W , Cao Q . Progress of research on mechanical properties of FRP reinforced seawater coral aggregate concrete materials and members [J]. Journal of Composite Materials , 2022 , 39 ( 3 ): 926 - 941 . (in Chinese)
Yue C J , Yu H F , Ma H Y , et al . Experimental study on dynamic impact performance of all-coral seawater concrete [J]. Materials Guide , 2019 , 33 ( 16 ): 2697 - 2703 . (in Chinese)
Da B , Yu H , Ma H , et al . Experimental investigation of whole stress-strain curves of coral concrete [J]. Construction and Building Materials , 2016 , 122 : 81 - 89 .
Chen Z P , Zhou J , Chen Y L , et al . Experimental study on mechanical properties of seawater concrete with coral coarse aggregate [J]. Journal of Applied Mechanics , 2022 , 37 ( 5 ): 1999 - 2006 . (in Chinese)
Wang Q , Li P , Tian Y , et al . Mechanical properties and microstructure of Portland cement concrete prepared with coral reef sand [J]. Journal of Wuhan University of Technology , 2016 , 31 ( 5 ): 996 - 1001 .
Diao Y T , Ma H Y , Yu H F , et al . Strength of coral concrete aggregate - net slurry interface zone [J]. Journal of Construction Materials , 2021 , 24 ( 3 ): 516 - 524 . (in Chinese)
Chen Y L , Liu Z H , Ye P H , et al . Direct shear mechanical properties and damage evolution of high-temperature post-coral seawater marine sand concrete [J]. Journal of Composites , 2023 , 40 ( 7 ): 4128 - 4138 . (in Chinese)
Zhou C H , Wang J Y , Wang X T , et al . Experimental study on the bonding performance of GFRP bars with seawater coral concrete after high temperature action [J/OL]. Journal of Composites , 2023 , 40 ( 4 ): 2224 - 2239 . (in Chinese)
Vafaei D , Ma X , Hassanli R , et al . Microstructural and mechanical properties of fiber-reinforced seawater sea-sand concrete under elevated temperatures [J]. Journal of Building Engineering , 2022 , 50 : 104140 .
Guo J B , Yu H F , Ma H Y . Damage and deterioration characteristics of basic magnesium sulfate cement-coral aggregate concrete exposed to elevated temperature [J]. Engineering Failure Analysis , 2022 , 137 : 106275 .
Li Z Y , Liu Y X , Yao Z H . Analytical model for high-temperature performance deterioration of ordinary silicate concrete [J]. Journal of Disaster Prevention and Mitigation Engineering , 2020 , 40 ( 2 ): 229 - 235 . (in Chinese)