Research and development of cement-treated granular road materials from the use of CDW "MATRACE.
The general objective of this research is to develop soil-cement from the use of recycled aggregates from CDW for road sub-bases and bases, contributing to the development of a sustainable economy by giving added value to this type of by-product. Until now, the use of the fine fraction of CDW has hardly been studied, most studies being oriented towards the use of the coarse fraction of CDW in concretes or as granular material for fillings and road surfaces.
From an environmental point of view, one of the problems that can arise from the use of recycled aggregates from CDW is leaching of pollutants. In the research, the capacity of soils treated with cement to retain pollutant components will be studied.
The objective is to evaluate recycled aggregates from RCD for soil-cement both from a technical and environmental point of view, studying the leaching of these materials, including the most important aspects to favour their use without risks. In addition to their use in the laboratory, their industrial application will be studied, determining the manufacturing process and the implementation of this type of product.
Depending on the nature of the source CDW, recycled aggregates are usually classified as concrete, ceramic, asphalt or mixed. Mixed recycled aggregates (MRA) account for around 80% of total CDW and come from demolition of buildings. They include a wide variety of materials including concrete waste, ceramic products, unbound aggregates and, to a lesser extent, other materials such as asphalt material, gypsum, glass, wood, etc. As they are the most abundant, this research will focus its study on ARM. Specifically, we propose the use of the fine fraction of ARM for the production of soil-cement (granular materials treated with cement) for sub-bases and bases for roads. This will encourage the revalorisation of this waste, helping to achieve a zero waste economy.
This project is financed through a grant from the Instituto de Fomento de la Región de Murcia aimed at the Technological Centres of the Region of Murcia, Modality 1: R&D Projects, co-financed by 80% by the ERDF global grant.
