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Prodution of Concrete Aggregates with High Strength by Using the Wastes

机译：使用废物生产高强度的混凝土聚集体

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Several series of concrete aggregates with different content of steel slag, blast furnace slag, coal gangue and fly ash were prepared. The reasonable ratio of raw materials and process parameters to prepare the aggregates were determined by measuring the water absorption, crush indicators and apparent density of the aggregates. The mineral composition and morphology of the aggregates were analyzed by XRD, SEM and EDS. The results showed the aggregate with about 30% steel slag, 50% slag, 20% gangue, and claimed at 1300°C for 90 minutes had the best performance. The water absorption of the aggregate is about 1.55%, which is lower than that of the natural aggregates (about 2.2% on average). Both the crushing index (about 11.39%) and the apparent density (2672 kg/m~3) of the aggregate meet the requirements of national standards.
机译：制备了几种钢渣，高炉渣，煤矸石和粉煤灰的不同含量的混凝土聚集体。通过测量聚集体的吸水，压碎指示剂和表观密度来确定原料和工艺参数的合理比例来制备聚集体。通过XRD，SEM和EDS分析聚集体的矿物成分和形态。结果表明，大约30％的钢渣，50％炉渣，20％煤矸石，并在1300℃下要求保护90分钟具有最佳性能。聚集体的吸水率约为1.55％，低于天然聚集体（平均约2.2％）。粉碎指数（约11.39％）和骨料的表观密度（2672千克/ m〜3）符合国家标准的要求。

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