This study evaluated four types of zinc production waste and limestone powder to be used as filler in asphalt mixtures. The properties of the fillers, asphalt mastic and mixtures made by the fillers were investigated. Only the results for fillers and mastics are provided. The physical and chemical properties and morphology of waste fillers, namely cobalt cake, leach cake, nickel cake, and zinc ash, as well as the limestone powder, as control filler, were examined. The moisture content, particle and bulk density, methylene blue value (MBV), Rigden voids (RV), pH, chemical compositions, morphology, hydrophobicity, size distribution, solubility in water, and specific surface area of the fillers were evaluated. Also, using a constant volumetric filler to binder ratio, asphalt mastics were made and their softening point, ductility, penetration grade and rheological properties were measured and compared with neat binder. Evaluation of the properties of fillers showed that the fillers can be potentially used in asphalt mixtures. Zinc ash had comparable and even better properties than the control filler. In terms of hydrophobicity, solubility in water and moisture content, the best performance belonged to zinc ash, followed by limestone, nickel, cobalt, and leach cake, respectively. Leach and cobalt cake showed to be hydrophilic fillers. The lowest MBV was found for the zinc ash, followed by limestone, nickel, leach and cobalt cake. The highest RV was found for the leach cake, and lowest for zinc ash filler. The fillers have different levels of stiffening effect on the mastic. In terms of temperature susceptibility using the softening point test results, the lowest sensitivity was obtained for zinc ash followed by cobalt cake, leach cake, limestone, and nickel cake. However, penetration and DSR test results revealed that the highest stiffening effect was obtained using zinc ash followed by cobalt cake, nickel cake, limestone, and leach cake. The stiffening effect of the fillers can be described by the morphology of filler particles; however, RV cannot be directly related to the stiffening effect of the fillers.

这项研究评估了四种类型的锌生产废料和石灰石粉，将其用作沥青混合料的填料。研究了填料，沥青胶泥和由填料制成的混合物的性能。仅提供填料和胶泥的结果。检查了废填料（钴饼，浸出饼，镍饼和锌灰）以及石灰石粉（作为对照填料）的理化性质和形态。评估了填料的水分含量，颗粒和堆积密度，亚甲基蓝值（MBV），Rigden空隙（RV），pH，化学组成，形态，疏水性，尺寸分布，在水中的溶解度和比表面积。此外，使用恒定的体积填充剂与粘合剂的比例，制备沥青胶泥及其软化点，延展性，测量了渗透等级和流变性，并与纯粘合剂进行了比较。填料性能的评估表明，填料可潜在地用于沥青混合物中。锌灰比对照填料具有可比甚至更好的性能。就疏水性，在水和水分含量中的溶解度而言，最好的性能属于锌灰，其次分别是石灰石，镍，钴和浸出饼。沥滤和钴饼显示为亲水性填料。锌灰的MBV最低，其次是石灰石，镍，浸出和钴饼。沥滤饼的RV最高，锌灰填料的RV最低。填充物对乳香的硬化作用程度不同。在使用软化点测试结果的温度敏感性方面，锌灰，钴饼，浸出饼，石灰石和镍饼的灵敏度最低。但是，渗透和DSR测试结果表明，使用锌灰，钴饼，镍饼，石灰石和浸出饼获得最高的硬化效果。填料的硬化效果可以用填料颗粒的形态来描述；但是，RV不能直接与填料的硬化效果相关。