Recycling of sludge from ornamental stone processing as resource in civil constructions

Abstract

The main aim of this research is to find a feasible way to reuse mud cuttings from ornamental stone, such as trachyte and basalt, normally disposed of in landfills, using it in the production of full and/or aerated bricks for civil purposes. The study examined the characteristics of full bricks produced with mud cuttings from ornamental stone including, resistance to uniaxial compression, water absorption and apparent density of mud alone or when mixed with two types of clay at different firing temperatures. As temperature rose, the strength and density of the samples increased, while absorption decreased. The use of clay improved the sintering process during firing, giving a less porous and mechanically stronger material that normally used to produce full bricks for civil constructions. For the second type of product, aerated bricks, the study investigated porosity, density, resistance to uniaxial compression and the thermal insulation capacity of bricks made by adding lime and aluminium powder to trachyte mud at different sintering temperatures, ranging between 980 and 1040°C. As temperature increased, it was observed that an increase in the resistance and density of the samples was accompanied by a reduction in the heat-insulating capacity. When compared with commercial aerated bricks, it was found that aerated bricks obtained from trachyte sludge cuttings and fired at temperatures below 1030°C, have a greater thermal insulation capacity but a lower mechanical resistance, restricting their use to non-load-bearing masonry applications.

Evaluating the feasibility of blending fly ash and quarry dust in high-strength concrete to develop a sustainable concrete: A Study on the Mechanical and Durability Properties

“…More space may be needed for quarry dust disposal than there are active quarries. [5]. Despite numerous proposed uses for these byproducts, they remain underutilized [2].…”

Utilization of Quarry Dust and Calcareous Fly Ash for the Production of Lightweight Cellular Micro-Concrete—Synthesis and Characterization

“…Disposal of quarry dust is one of the most critical problems facing the quarrying industry, since, on a number of occasions, quarry dust landfills may involve more space than the total of quarrying operations [4]. Using a large amount of quarry dust in construction applications could be a feasible solution to this problem, leading to both economic and environmental benefits for the quarrying sector.…”

“…Over the past few years, there have been made many research efforts concerning the utilization of quarry dust as sand substitution material (partial or total replacement) for the production of several types of concrete and building elements [1,[3][4][5][6][7][8][9][10][11][12][13][14]. However, the usage of quarry dust in these applications is rather demanding with regard to compositional aspects.…”

Research for Global Coordinating Method of Large Equipment Scheduling in Construction Site

“…Lynsay et al [7] studied the carbon emission problem in earth-rock allocation through proposing bottom-up approach. Above all, earth-rock material allocation is optimized on the basis of traffic flow, and optimization does not exist in deadhead mileage, for the vehicles generally run back and forth from point to point [8,9]. However, in addition to the material transport equipment, another construction equipment (work equipment such as bulldozer and backhoe) faces prominent problem of deadhead mileage optimization in scheduling transfer which to date has no relevant research results [10].…”