CAJ | 학술논문

对普通混凝土、镀铜微丝钢纤维混凝土、纤维素纤维混凝土进行200℃、400℃、600℃、800℃的高温作用，然后对高温试件分别进行自然冷却和射水冷却，得到了三种混凝土在不同温度、不同冷却方式下的质量损失率、残余抗压强度以及表观损伤指标。对比研究表明，在射水冷却条件下，普通混凝土和纤维素纤维混凝土的残余抗压强度相比较自然冷却有明显的下降，其中纤维素纤维混凝土在600℃下降了24.2%，800℃的普通混凝土在射水冷却过程中发生了爆炸，对现实火灾扑救极为不利，而射水冷却对钢纤维混凝土的影响不明显，残余抗压强度与自然冷却试件基本相同。
대보통혼응토、도동미사강섬유혼응토、섬유소섬유혼응토진행200℃、400℃、600℃、800℃적고온작용，연후대고온시건분별진행자연냉각화사수냉각，득도료삼충혼응토재불동온도、불동냉각방식하적질량손실솔、잔여항압강도이급표관손상지표。대비연구표명，재사수냉각조건하，보통혼응토화섬유소섬유혼응토적잔여항압강도상비교자연냉각유명현적하강，기중섬유소섬유혼응토재600℃하강료24.2%，800℃적보통혼응토재사수냉각과정중발생료폭작，대현실화재복구겁위불리，이사수냉각대강섬유혼응토적영향불명현，잔여항압강도여자연냉각시건기본상동。
By performing high-temperature function, ordinary concrete, copper-plating microfilament steel fiber con-crete,cellulose fiber concrete were heated respectively at 200℃,400℃, 600℃, 800℃, then by natural cooling and water jetting cooling separately, the indexes of mass loss rate, residual compressive strength and apparent damage of three kinds of concrete conducted in different temperatures and by different cooling methods were made. The comparative experiments show that under water jetting cooling, the residual compressive strength of ordinary concrete and cellulose fiber reinforced concrete have a significant decrease compared with natural cooling. The cellulose fiber reinforced concrete decreases 24.2%at 600℃. The ordinary concrete heated at 800℃explodes during water jetting cooling, which has an extremely neg-ative impact on real fire fighting cases. Water jetting cooling has little effect on steel fiber reinforced concrete.