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RCCA(再生混凝土粗骨料)的性能决定了再生骨料混凝土的亲水性和再生骨料混凝土的水灰比设计。为此探讨不同来源途径再生粗骨料吸水率与失水率及其两者之间的差异性,选取了4种不同来源的废混凝土,即旧房拆迁、高强桩基、市政工程和科学研究的废混凝土,经分别破碎和加工得到相应的RCCA,采用饱和面干法每间隔一段时间分别测试了它们的吸水率,采用室温下自然晾干方法每隔一段时间分别测试了它们的失水率。试验表明:因来源途径不同,RCCA的吸水率和失水率均存在有很大差别。因此,对于不同来源的RCCA的采集与应用,建议加以分类处理。
The performance of RCCA (recycled concrete coarse aggregate) determines the hydrophilicity of recycled aggregate concrete and the water-cement ratio design of recycled aggregate concrete. In order to explore the differences of water absorption and water loss of recycled aggregates from different sources and four different sources of waste concrete, that is, removal of old houses, high-strength pile foundations, municipal engineering and scientific research Of the waste concrete, respectively, after crushing and processing to get the corresponding RCCA, saturated surface dry method were tested at intervals of time their water absorption rate, using natural drying at room temperature at regular intervals were tested for their water loss . Experiments show that: due to different sources, RCCA water absorption and loss of water there is a big difference. Therefore, for different sources of RCCA collection and application, it is recommended to be classified.