State-of-art review of current standards and specifications concerning recycled aggregates from CDW

Abstract Brazil has specific standards that guide the use of recycled aggregates in pavement construction and nonstructural concrete. However, due to the fact that the recycling of construction and demolition waste (CDW) is still a recent activity in the in Brazil, when compared to other countries, it is understandable that there is a gap regarding the standardization of these materials, as well as some resistance by the construction industry to using them. This study conducts a systematic analysis of the literature on technical and normative specifications on the use of recycled aggregates at a national and international level. In this analysis, the technical, regulatory and quality control standards and guidelines for the use of recycled aggregates from 12 countries, including Brazil were examined. A systematic analysis of the standards allowed an appraisal of the international technical and normative production examined, supplemented by a brief comparison with the latest national review on the subject. This enabled the authors to develop a proposal for technical and normative guidelines for the use of recycled construction and demolition materials in Brazil. It is expected that the results of this study will support the sector in the further development of technical specifications and standards, producing practical contributions for the consolidation of the CDW recycling in the country.

摘要：巴西针对再生骨料在路面工程与非结构混凝土中的应用制定了专门标准。然而相较于其他国家，巴西的建筑与拆除废料（Construction and Demolition Waste, CDW）回收产业仍属新兴领域，因此该类材料的标准化存在缺口，且建筑业对其应用存在一定抵触情绪，这一现状不难理解。本研究对国内外再生骨料应用的技术与规范标准相关文献开展了系统梳理分析，涵盖包括巴西在内的12个国家的再生骨料应用技术、监管及质量控制标准与指南。通过对上述标准的系统分析，可对所梳理的国际技术与规范成果进行评估，并辅以与巴西国内该领域最新综述的简要对比，据此研究团队可为巴西再生建筑与拆除废料的应用制定技术与规范指南提案。本研究成果有望助力该行业进一步完善技术规范与标准，为巴西建筑与拆除废料回收产业的规范化发展提供切实支撑。