Application of Concretes Made with Glass Powder Binder at High Replacement Rates

Abstract

Glass is a material that can be reused, except for a small part that, due to its residual characteristics, cannot be reused and becomes a nonbiodegradable waste to accumulate in landfills. The chemical composition and pozzolanic properties of waste glass are encouraging for the use of these wastes in the cement and concrete industries and for providing technically and environmentally viable solutions. In this study, we propose the production of deactivated concretes with a high content of glass powder in the binder. The substitution percentage of glass powder for cement used in this work was between 70% and 80%. Consistency, air content, bulk density, workability, compression strength, and permeability tests were performed. Regarding compressive strength, the results obtained at 90 days for percentages of cement substitution by glass powder of 70 and 80%, respectively, were 14.2 and 8.6. The chemical analysis of leachates showed concentrations of Fe, Cu, V, Ni, and Mo, in mg L−1, of 1.57, 1.38, 0.85, 0.95, and 0.44, respectively. The results obtained, compared with the relevant legislation, have proved that the inclusion of glass powder in a high percentage of substitution and with a granulometry of 20 µm in the manufacture of deactivated concretes is feasible for exterior pavements.

Influence of chemical pretreatment on the pozzolanicity of recycled glass microparticles used as a substitute for Portland cement

“…In order to verify the pozzolanicity of the different glass parameters used indirectly (through mechanical resistance), the standard establishes that the mortar containing 25% of cement replacement by the supposedly pozzolanic material must reach a minimum limit of 90% of the compressive strength of the reference mortar (100% cement), for the material to be considered pozzolanic. By the criterion of NBR 5752 (21), all particle sizes used were considered pozzolanic, it can be seen that both for treated and untreated particles, the smaller the particle size used, the better the mechanical result, as in recent works that investigated the influence of granulometry on the pozzolanic properties of glass (25)(26)(27)(28)(29)(30).…”

“…Many authors have investigated and proposed physical methods to enhance the pozzolanic properties of glass by reducing the size of glass particles and consequently increasing their surface area. It is widely agreed that reducing particle size and increasing surface area of glass effectively alters the kinetics of the chemical reaction toward the pozzolanic reaction (5,(25)(26)(27)(28)(29)(30). However, some authors discuss chemical pretreatments/methods aiming to increase the pozzolanicity of SCMs (31)(32)(33).…”

Experimental Study on Long-Term Mechanical Properties and Durability of Waste Glass Added to OPC Concrete

“…To address the issues of alkali-aggregate reaction and early strength deficiency when incorporating waste glass into concrete, many scholars have shifted their research focus to grinding waste glass particles and replacing cement or using them as supplementary cementitious materials, namely mineral admixtures, in concrete. Through experimental analysis, some researchers demonstrated that finely ground waste glass powder, when partially replacing cement [25,26], exhibits an activity index exceeding 70% to 80% of that of fly ash materials under natural curing conditions, possessing properties comparable to cement and mineral admixtures. When the substitution rate of WGP for cement does not exceed 25%, its impact on concrete can be neglected.…”

Influence of Waste Glass Powder Addition on the Microstructure and Mechanical Properties of Autoclaved Building Materials

“…Waste glass deposited in landfills has been an issue for decades, as its recycling is often problematic due to the fact of chemical contamination or the presence of different coloring ions [1,2]. Over the last couple of years, numerous papers have been dedicated to the use of waste glass powder as a pozzolanic additive in traditional mortars and concretes (e.g., [1][2][3][4][5][6][7][8][9][10]). However, only a few describe the utilization of glass powder in the production of autoclaved building materials [11][12][13].…”