CAJ | 학술논문

采用自主研制的高温 SHPB 试验系统，对高温条件下地质聚合物混凝土的动态抗压强度进行了试验研究。结果表明：200℃时地质聚合物混凝土的动态抗压强度较常温时有所增长，800℃时强度则急剧下降；应变率随弹速近似线性增长；同一弹速水平下，200～600℃时的应变率与常温接近，800℃时较常温提高明显；高温条件下，由侧向约束引起的附加应力可以忽略不计，试验所测得的动态强度增长因子（DIF）的应变率增强效应反应了材料的本质属性；在30～130 s -1应变率范围内，高温下地质聚合物混凝土的 DIF 与应变率的对数呈线性关系，且温度越高，应变率效应越明显。
채용자주연제적고온 SHPB 시험계통，대고온조건하지질취합물혼응토적동태항압강도진행료시험연구。결과표명：200℃시지질취합물혼응토적동태항압강도교상온시유소증장，800℃시강도칙급극하강；응변솔수탄속근사선성증장；동일탄속수평하，200～600℃시적응변솔여상온접근，800℃시교상온제고명현；고온조건하，유측향약속인기적부가응력가이홀략불계，시험소측득적동태강도증장인자（DIF）적응변솔증강효응반응료재료적본질속성；재30～130 s -1응변솔범위내，고온하지질취합물혼응토적 DIF 여응변솔적대수정선성관계，차온도월고，응변솔효응월명현。
The dynamic compressive strength of geopolymeric concrete under high temperatures was investigated using a self-designed high temperature SHPB system.The results showed that the dynamic compressive strength of geopolymeric concrete at 200℃ is higher than that at room temperature,but it drops dramatically at 800℃;the strain rate increases approximately linearly with increase in projectile velocity.At a given projectile velocity,the strain rate changes slightly at 200 -600℃ and rises evidently at 800℃ compared with that at room temperature;under elevated temperatures, the additional stress of geopolymeric concrete specimens caused by lateral confinement can be ignored,thus the strain rate effect on the dynamic increase factor (DIF)obtained from test data can reflect the inherent nature of geopolymeric concrete;DIF increases linearly with increase in the logarithm of strain rate over the strain rate range of 30 -130 s -1;the higher the temperature,the more obvious the strain rate effect.