Sustainable Materials: A Review of Recycled Concrete Aggregate Utilization as a Pavement Materials


Aytekin B. , Mardanı Aghabaglou A.

Transportation Research Record, vol.1, pp.1-13, 2021 (Journal Indexed in SCI Expanded)

  • Publication Type: Article / Article
  • Volume: 1
  • Publication Date: 2021
  • Title of Journal : Transportation Research Record
  • Page Numbers: pp.1-13

Abstract

In this study, a comprehensive literature review is conducted on the properties of recycled concrete aggregate (RCA), which is the dominant construction and demolition waste material and their comparison with natural aggregate (NA). The effects of the consequences of crushing in the particles as a result of the compaction on the modulus of elasticity, permanent deformation and CBR are analyzed. The paper also contains the consumption of NA, waste disposal policies of different countries, RCA standards and the environmental-economic reasons for its use. This literature review mainly focuses on pavement layers as this is the main application of RCA in the utilization of recycled materials. Developing an integrated construction and demolition waste management will help achieve the main goal of preventing and reducing the generation of these wastes, both locally and globally. In this way, not only the main goal of preventing the increase in the production of construction and demolition waste is achieved, but also the reuse and recycling of the waste materials produced are encouraged. Results show that with propercare and process control, RCA has equivalent or better performance than virgin aggregate for almost any application and can be used in unbound pavement layers or other applications requiring compaction. But it is always recommended that their mechanical properties and durability performance be evaluated with full-scale tests before use. It is thought that the information provided will be useful for contractors and engineers to evaluate alternative solutions and to explore the rational use of such sustainable materials in applications.