Sustainable Aggregates Production: Green Applications for Aggregate By-Products
Sustainable Aggregates Production: Green Applications for Aggregate By-Products
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发表时间：
2015-06
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通讯作者：
E. Tutumluer;H. Ozer;Wenting Hou;Vincent Mwumvaneza
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作者：
E. Tutumluer;H. Ozer;Wenting Hou;Vincent Mwumvaneza
建筑业越来越重视可持续性和回收利用，需要生产粉尘更低（更清洁的骨料）和最大尺寸更小的骨料级配，因此，采石场副产品（qb）的数量增加。四分卫通常小于1/4英寸。（6毫米）尺寸。本报告提供了对伊利诺伊州总生产商进行的行业调查的结果，调查内容包括年生产率、产生的多余qb以及qb的当前应用领域。此外，还进行了详细的实验室研究，以表征伊利诺伊州四个不同采石场在一级、二级和三级骨料生产阶段生产的QB材料的工程特性。由于QB材料的无侧限抗压强度较低（小于11psi），因此使用化学外加剂稳定剂（如波特兰水泥和C类粉煤灰）来改善QB材料的强度特性。观察到的稳定QB材料强度的显著增加可能表明QB适用于可持续路面应用。建议了潜在的策略，以利用多余的罚款，在路面施工中加入QB材料。
Increased emphasis in the construction industry on sustainability and recycling requires production of aggregate gradations with lower dust (cleaner aggregates) and smaller maximum sizes—hence, increased amount of quarry by-products (QBs). QBs are usually less than 1/4 in. (6 mm) in size. This report provides findings of an industry survey conducted among Illinois aggregate producers on the annual production rate, excess QBs generated, and current application areas of QBs. In addition, a detailed laboratory study was conducted to characterize the engineering properties of QB materials produced in the primary, secondary, and tertiary aggregate production stages from four different quarries operating in the State of Illinois. Since unconfined compressive strength for QB materials was low (less than 11 psi), chemical admixture stabilizers such as Portland cement and Class C fly ash were used to improve the strength properties of QB materials. Significant increases in the strength of stabilized QB materials observed may indicate suitability of QBs for sustainable pavement applications. Recommendations are made on potential strategies to utilize excess fines by incorporating QB materials in pavement construction.