Promotora Mediterránea-2, S. A. (PROMSA) is a company part of the Cementos Molins group that sells construction materials such as concrete, aggregate and mortar. The company is also dedicated to the recycling of materials and the recovery of waste aimed to produce refused derived fuel (RDF). During the distribution of the materials to the different customers, concrete goes back to the PROMSA manufacturing plant. The returned concrete can be of 1 or 2 m3 (interesting volumes from 2 m3). This is considered waste together with the concrete exceeding from the production of fresh concrete. The co

Concrete is one of the most used materials in the infrastructure sector since it presents handling features in fresh concrete and high compressive strength in hardened concrete. However, it generates large volumes of waste resulting from the demolition and rejection processes, as well as from the manufacturing process itself. Concrete is the material resulting from mixing cement (or other binder) with aggregates (gravel and sand) and water. In the manufacture of concrete, different types of solid waste are generated: Surplus of concrete: fresh concrete, excess or rejected material after