Utilization of Iron Ore Tailings for the Production of Fly Ash — GGBS-Based Geopolymer Bricks

Abstract

In India, million tons of manufacturing ravages such as ground-granulated blast furnace slag (GGBS),°y ash and mine tailings, are endangering. These ravages turn out to be injurious as they are land¯lled close to the production sites and somewhere else. Since these manufacturing ravages include silica, alumina, calcium, etc., it is probable to formulate these as unprocessed resources to produce building substance which diminishes the carbon trace. In this circumstance, this analysis observes on utilizing iron ore tailings and slag sand as a substitution for clay or natural sand for the construction of steady geopolymer obstruct. Furthermore, in this analysis, geopolymer is utilized as a binder rather than cement. Expansion of geopolymer binder-oriented bricks with°y ash and GGBS has been implemented in this study. The analysis consists of automatic possessions of the geopolymer bricks. Sodium silicate (Na 2 SiO 3 ) and sodium hydroxide (NaOH) resolution have been employed as alkaline activators. The proportion of alkaline liquid to aluminosilicate solid quotient and fraction of binder encompass foremost control on the force of brick. The bricks were casted and cured at ambient warmth. The compressive strength was tested at 7, 14 and 28 days.

Evaluation of the Effect of Granite Waste Powder by Varying the Molarity of Activator on the Mechanical Properties of Ground Granulated Blast-Furnace Slag-Based Geopolymer Concrete

“…In contrast, GGBS has angular particle shape; the larger surface area and high porosity of rich content of silica-based ingredients are the two factors affecting workability. The high amount of amorphous silica with porous structured particles in geopolymer paste increases the specific surface area leading to better reactivity GWP, which signifies a heterogeneous microstructure in which particles form agglomerations and become dense with a variety of particles [41][42][43][44]. GWP binders are high in Na ions, and the Na/Al molar ratio increases as fusion occurs.…”

“…As the molar concentration of alkaline agents is increased, that increases the slump of concrete. in conventional concrete, water plays a significant role in increasing the slump and admixture, but in GPC a similar role is played by water to solids ratio and alkali/binder ratio [40][41][42]45].…”

Quarry Waste as Precursors in Geopolymers for Civil Engineering Applications: A Decade in Review

“…The maximum compressive strength obtained was 8.27 MPa after 28 days of curing [83]. The production of geopolymer bricks using iron ore tailings was also investigated by different researchers [35,84]. One of the major advantages of producing geopolymer bricks is the avoidance of using high-temperature kiln firing used during traditional production procedures.…”

“…The precursors are mixed with liquid hardeners to form a geopolymeric gel, which consequently hardens because of geopolymer condensation. Different precursors have been used in various research studies such as fly ash [ 22 , 28 , 29 ], metakaolin [ 30 , 31 , 32 ], and blast furnace slag [ 33 , 34 , 35 , 36 ]. In most cases, the reviewed studies have investigated the feasibility of using quarry dust, mine tailings, or industrial waste as precursors in geopolymer cements and binders [ 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 ].…”

Artificial stone production using iron ore tailing (IOT)

“…Recycling is the most appropriate reuse option [11,12]. Fontes et al [13] evaluated the technical feasibility of using IOT waste as a building material, such as mortars and tiles.…”