防灾减灾工程学报2024，Vol.44Issue(3)：544-550,567,8.DOI:10.13409/j.cnki.jdpme.20230305001
高温后珊瑚海水海砂混凝土力学性能试验研究
Experimental Study on Mechanical Properties of Coral Seawater Sea Sand Concrete after High Temperature
摘要
Abstract
To study the mechanical properties of Coral Seawater Sea Sand Concrete(CSSC)after ex-posure to high temperatures,axial compression and static compression elastic modulus tests were con-ducted 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 param-eters 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 micro-structural 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 me-chanical 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.关键词
珊瑚海水海砂混凝土/高温/微观结构/受压性能/强度退化机理Key words
coral seawater sea sand concrete/high temperature/microstructure/mechanical properties/strength degradation mechanism分类
建筑与水利引用本文复制引用
胡强,李佳成,陈宇良,陈宗平..高温后珊瑚海水海砂混凝土力学性能试验研究[J].防灾减灾工程学报,2024,44(3):544-550,567,8.基金项目
中国博士后科学基金(2021M693854)、广西自然科学基金面上项目(2020GXNSFAA159150)、广西科技大学研究生教育创新计划项目(GKYC202229)资助 （2021M693854）
