Portal de Periódicos da CAPES

Sludges from the Ornamental Rock Primary Cut: Mortar Incorporation Study

2023; Springer International Publishing; Linguagem: Inglês

10.1007/978-3-031-25986-9_3

2522-8722

João Dixo, Sílvia Spínola, Adriano Teixeira,

Tunneling and Rock Mechanics

One of mankind's main challenges is to study the benefits of the mining, extractive and manufacturing industries and the environmental impacts caused by their activity. The natural stones sector generates high amounts of sludge. This work aims to complement existing research to find sustainable solutions for this problem. For that purpose, a physical and chemical characterisation was made of four sludges from a Portuguese industry, generated in the sawing and primary cut of natural stones, known as LCA, LARM, FPEM and FPMC. The tests included grading analysis by sieving and sedimentation (X-ray attenuation method), determining density, the quality of fine particles (methylene blue test), and finally, quantitative chemical measurements by X-ray fluorescence. After that, the sludges were incorporated in mortars, replacing part of the cement (20% and 40%) in those mortars' manufacture. To investigate this possibility, tests of resistance to compression and bending were carried out on the mortars at different ages. Based on the results, the objective of characterising the sludges was fulfilled, and it was concluded that it would be possible to incorporate them in mortars.