Effect of Granite Residue Incorporation on the Behavior of Mortars.

Afonso Rangel Garcez De Azevedo,Jonas Alexandre,Euzébio Bernabé Zanelato,Laimara Da Silva Barroso,Markssuel Teixeira Marvila,Gustavo De Castro Xavier,Sergio Neves Monteiro

doi:10.3390/ma12091449

Afonso Rangel Garcez De Azevedo, Jonas Alexandre + Show 5 more

Open Access

https://doi.org/10.3390/ma12091449

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Abstract

Civil construction is one of the most resource-consuming sectors in the world. For this reason, the last years have witnessed the study of reusing industrial residues in building materials. The ornamental stone processing industry has a considerable environmental liability related to residue generation during the cutting stages of granite blocks. The objective of this work is to analyze the viability of incorporating granite residues, up to 100%, to substitute sand in coating mortars for building construction. Mortars without residue, as control, and incorporated with 20, 40, 60, 80, and 100% of granite residue were subjected to consistency tests, incorporated air and water retention together with the rheological characterization using the squeeze-flow and the dropping-ball methods. The results show that mortars with 40% granite residues presented greater plastic deformation, helping their applicability by also presenting improved technological properties in the fresh state.

Highlights

In the current scenario, where there is a huge generation of residues on a global scale, it becomes essential that the construction industry be concerned with sustainable development, seeking alternatives to reuse solid wastes by reinserting them into the sector
The results demonstrated that a decrease in the workability parameters occurs when the substitution is performed for the cement, but the resistance parameters are improved
The materials used in the present work were: (i) Portland cement CP II-E; and (ii) hydrated lime

Summary

Introduction

In the current scenario, where there is a huge generation of residues on a global scale, it becomes essential that the construction industry be concerned with sustainable development, seeking alternatives to reuse solid wastes by reinserting them into the sector. Recent research has evaluated the application of industrial solid residues in ceramic matrices, as a way of improving its technological properties [3]. Alternatives have been proposed for residues, such as cement matrix additions including concretes and mortars [4,5], as well as fillers in blocks of cement soil [6,7]. Ornamental stones’, such as granite, processing industry generates a large amount of residues during the process of transforming raw blocks (extracted in blast processes) into slabs. Up to 80% of loss occurs from original rocks, with other steps such as cutting and polishing [8,9,10] contributing to more residues

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