Study of the behavior of bastard mortars prepared with recycled aerial and reinforced with fibres

The building sector is one of the largest producers of waste on the planet, however, the growing depletion of natural resources and the exponential increase in greenhouse gas emissions in industrial sectors, is having an impact on the search for new solutions constructive more respectful with the environment. There are many processes in the construction sector that are being influenced by awareness and responsibility, in the interest of greater sustainability and less environmental impact on the planet [1]. Based on this sustainability in the construction, many studies have deepened the recycling and reuse of demolition construction waste. This is the case of recycled aggregates, which have been incorporated into the manufacture of mortars by partially or completely replacing the natural aggregate, showing good results and demonstrating that it is possible to incorporate them into the sector [2] [3]. The present study studies the viability of incorporating recycled aggregates in the elaboration of bastard mortars made with two types of binders in equal parts, cement and lime. For this, the complete replacement of the natural aggregate by ceramic recycled aggregate has been carried out, with and without the addition of fibres. Two types of dosages have been carried out in 1: 3 and 1: 4 proportions, as well as, reference test pieces, adding to the mortars made with recycled aggregate five types of fibres, performing retraction, tensile, compression and hardness tests according to the brand name. current regulations. So far, the results show that the addition of fibres represents a significant improvement in bastard mortars of 1: 3 ratio, while in the 1: 4 dosage they show a negative efficiency. In addition, the incorporation of lime in the mortars has a positive effect, decreasing the retraction in the samples, an effect that is even better with the addition of fibre.