作　　者： ; ; ; ;

机构地区： 郑州大学土木工程学院新型建材与结构研究中心

出　　处： 《郑州大学学报（工学版）》 2005年第1期1-4,共4页

摘　　要： 通过钢纤维混凝土冻融循环试验,分析了冻融循环次数、混凝土强度等级、钢纤维体积率等因素对钢纤维混凝土冻融后抗压强度、劈拉强度、抗折强度的影响,探讨了钢纤维对混凝土的增强机理.试验结果表明,钢纤维的加入对冻融循环后混凝土的抗压强度影响较小;当冻融循环次数较少时,钢纤维对劈拉强度和抗折强度的增强作用比较明显,而当冻融次数较大且钢纤维体积率较高(2%)时,钢纤维对混凝土的劈拉强度和抗折强度反而具有一定的负面影响;钢纤维混凝土强度等级的提高对改善钢纤维混凝土的抗冻性能较为有效. 　Through the freeze-thaw experiment, the effects of cycle time of freeze-thaw, the grade of concrete strength and the volume fraction of steel fiber on the compressive strength, splitting strength and rupture strength of steel fiber reinforced concrete(SFRC) are analyzed. The reinforced mechanism of the SFRC under the action of freeze-thaw is also discussed. The results show that the effect of steel fiber on compressive strength of concrete is smaller, while the number of freezing-thawing circle is smaller, and the reinforced actions of steel fiber on splitting strength and rupture strength of concrete are notable. On the contrary, the negative effects of steel fiber with high volume fraction on the splitting strength and rupture strength of concrete exist; and the enhancement of the grade of concrete strength is rather effective in improving the freeze-resistant property of SFRC.

关 键 词： 钢纤维混凝土 劈拉强度 冻融循环试验 土力学 体积率 混凝土强度等级 抗折强度 试验研究 抗压强度 性能

领　　域： [建筑科学] [建筑科学]