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首页> 外文期刊>Journal of Residuals Science & Technology >Properties of high strength aggregates from clay-amended industrial sludge
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Properties of high strength aggregates from clay-amended industrial sludge

机译：粘土改性工业污泥中高强度骨料的性能

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摘要

This study examines the use of industrial sludge and marine clay wastes as substitutes for regular coarse granite aggregate in concrete. The raw materials were dried, pulverized and mixed at various proportions, molded with water into desired shapes, and sintered at elevated temperatures to produce the aggregates in pelletized or crushed forms. The pelletized aggregates displayed a higher particle density compared to the crushed counterparts. Both types of aggregates displayed lower densities relative to that of granite. The pelletized aggregate exhibited moderate aggregate strength of 18.1 to 30.4% aggregate impact value (AIV), while the crushed aggregate exhibited lower strength of 23.1 to 42.9% AIV The AIV values are comparable to that of granite. A complete replacement of regular granite aggregates in concrete was accomplished by substituting the coarse aggregates with the same volume of sintered sludge-clay aggregate. The pelletized and crushed aggregate made from 100% sludge provided moderate 28-day concrete compressive strengths of 38.5 and 39.0 N/mm(2), respectively, which was comparable to that of the control granite specimens with a strength of 38.0 N/mm(2). The results indicated that complete replacement of conventional granite aggregates by sintered aggregates of suitable sludge-clay proportions could produce concrete of structural grade.
机译：这项研究探讨了使用工业污泥和海洋粘土废料替代混凝土中常规的粗花岗岩料的方法。将原料干燥，粉碎并以各种比例混合，用水模制成所需的形状，并在高温下烧结以产生粒状或压碎形式的聚集体。与粉碎的对应物相比，颗粒状的聚集体显示出更高的颗粒密度。相对于花岗岩，两种骨料均显示出较低的密度。粒状骨料的中度骨料强度为18.1至30.4％骨料冲击值（AIV），而压碎骨料的较低强度为23.1至42.9％AIV。AIV值与花岗岩相当。通过用相同体积的烧结污泥-粘土骨料代替粗骨料，可以完全替代混凝土中的常规花岗岩骨料。由100％的污泥制成的粒状和压碎的骨料分别具有28天的适度抗压强度，分别为38.5和39.0 N / mm（2），与强度为38.0 N / mm的对照花岗岩样品相当。 2）。结果表明，用合适的污泥-粘土比例的烧结骨料完全替代常规的花岗岩骨料可以生产结构等级的混凝土。

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