Influence of Recycled Aggregate Quality From Precast Rejection on Mechanical Properties of Self-Compacting Concrete

In the present study, the recycling of modified bitumen soundproofing membranes, known as automotive type membranes (ATR), was carried out. The ATR sheet waste was incorporated in the mixing stage of the asphalt mastic, which is part of the manufacturing process of new sheets. The selection of the best asphalt mastic formulation was carried out at laboratory scale, where the ATR sheet cutting waste was added to the original asphalt mastic in percentages of 2.5, 5.0, 5.0, 7.5, 10.0 and 15.0 % w/w. The formulations were evaluated for six parameters of interest associated with softening point, rotational viscosity, density, weight per area, thickness and creep. It was determined that the properties of all the formulations studied met the minimum requirements stipulated for the commercialization of the product. The recycling process was carried out on an industrial scale using the formulation with 5% w/w of ATR residues, which presented a viscosity close to that of the original mastic. The results at industrial scale were favorable, since the six parameters of interest were within the ranges established in the regulations. Translated with www.DeepL.com/Translator (free version)