再生骨料混凝土高温损伤研究

发布时间：2018-02-13 15:38

  本文关键词： 再生混凝土 高温损伤 孔结构　出处：《硅酸盐通报》2017年05期 　论文类型：期刊论文

【摘要】：研究了再生骨料取代率对再生混凝土在模拟火灾温度下的外观形貌、抗压强度、质量及孔结构的影响。结果表明:由于再生骨料取自建筑废料,其骨料品质较天然骨料有所降低,导致其暴露在高温时出现密集裂缝,甚至骨料剥落。骨料取代率不大于40%和温度低于400℃时,再生混凝土仍能保持其力学强度且无质量损失。当温度大于600℃时,孔隙率显著增加,细孔比例相对降低。
[Abstract]:The effects of recycled aggregate replacement ratio on the appearance, compressive strength, quality and pore structure of recycled concrete under simulated fire temperature were studied. The quality of the aggregate is lower than that of the natural aggregate, which leads to the appearance of dense cracks and even the exfoliation of the aggregate when exposed to high temperature. When the aggregate substitution rate is not greater than 40% and the temperature is lower than 400 鈩，

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