PRODUCTION OF POROUS GLASS-CRYSTALLINE MATERIALS BASED ON GLASS CULLET AND CONVERTER SLAG

The study conducted the research aimed to obtaining a porous glass-crystalline materials based on glass cullet and converter slag, which was used as a gas-forming additive. In this work, the chemical and phase compositions of the studied slag were analyzed, and a differential thermal analysis of its sample was carried out. Converter slag was added to the composition of the masses in an amount of 2.5 to 30 wt%, the rest was glass cullet. Вurning of the samples was carried out in the temperature range of 850-925 ° C. For the samples under study, using a sand volumetric meter, the volume was determined and the swelling coefficient was calculated, the compressive strength was determined, and the type of structure, which depends on the average diameter of the prevailing pores, was analyzed. The dependence of the swelling coefficient of the investigated materials on the burdening composition and burning temperature has been established. To obtain porous materials with a swelling coefficient of 2.16-2.67 and uniform fine-porous structure (predominant pore size less than 0.5 mm), it is optimal to introduce converter slag into the composition of the masses in an amount of 10-15 wt%, and the recommended temperature range their burning 850-900 ° C. Analysis of the phase composition of the materials obtained indicates the presence of wollastonite as the main crystalline phase, which, due to the acicular structure of the crystals, has a reinforcing effect and contributes to an increase in strength characteristics. The developed porous glass-crystalline materials can be used as thermal insulation and aggregates in lightweight concrete.

The use of glass waste cullet in the concrete production as an important factor in the circular economy

The paper focuses on the use of glass waste as a substitute for aggregates (0/4, 4/8 and 8/16 mm) in the production of concrete in order to reduce the negative impact of existing waste on the environment. For the study, 5 mixtures were designed with gradual replacement of individual natural aggregate fractions in the concrete mixture by glass cullet. Real density, total water absorption and compressive strength were monitored on cubes with an edge of 100 mm for a period of 14 days to 3 years. The achieved compressive strength of samples with glass as a filler at the level of 50 MPa gives a good precondition for the real use of such concrete in practice. In addition, when combined it with lower real density and total water absorption.

Recycling Crushed Waste Beer Bottle Glass in Fired Clay Bricks

Waste glass is a readily available domestic material. Each year, around 257,000 tonnes of glass waste are produced in Victoria, and the majority is glass packings. Typically, mixed waste glass cullet is deposited in landfills due to the limited recycling techniques. As a result, landfills are facing a growing issue. Therefore, this study investigates the addition of waste beer bottle glass (BG) in fired clay bricks and examines the effects of varying firing temperatures on the physical and mechanical properties of the manufactured samples. Clay bricks containing 10% BG at a firing temperature of 950 °C depicted similar compressive strength results (41 MPa) to the control samples (42 MPa). The results of all tested bricks were found to be below the water absorption limit of 17%. The thermal conductivity of the bricks incorporating BG was investigated, and it was found that the thermal performance improved with the decreasing firing temperature. Moreover, an initial rate of absorption (IRA), XRD, and XRF analysis was conducted. The experimental results have been discussed and compared with the recommended acceptable properties for standard bricks.

The Process Development of Glass Cullet and Recycled Glass Aggregate for Improving Recycling Rate

Due to depletion of resources and the spread of environmental pollution, the sustainability of raw materials is emerging as an important issue. Glass bottles are one of the products that are easy to recycle, and many studies have been conducted to improve the recycling rate. In this study, we attempted to develop the waste glass bottles process that can be recycled into a glass cullet and recycled glass aggregate. To produce a cullet from waste glass bottles(WGBs), color quality standards must be satisfied. Therefore, we applied a multistage color sorter to the experiment. The recycled aggregate glass must adjust the particle size. Thus, we experimented with the optimum crusher selection test when applying the crushing process. And, we confirmed the appropriateness of process by aspect ratio analysis of product. In addition, we confirmed the trends in the data required to set the optimum design and operating conditions of the selected vertical shaft impact(VSI) crusher using discrete element method(DEM) simulations.

Research and Development of Multifunctional Porous Materials on the Basis of Clay and Glass Waste

The Ph. D. Thesis is devoted to the obtaining of porous ceramics from Latvian clay and household waste ‒ glass cullet. Using modern technological approaches porous and highly porous clay-glass ceramics were obtained, their properties and practical application possibilities were studied. The Doctoral Thesis consists of an introduction, literature review, methodical part, evaluation of the results of the experimental part, conclusions, and bibliography.

Eco-Friendly Innovation of Non-Fired Ceramic Tiles from Rice Husk Ash and Recycled Glass Cullet

The paper presents an experimental study on the production of non-fired ceramic tiles from rice husk ash (RHA) and green glass cullet (GGC) composites as a novel eco-friendly material. Eighteen mixture formulations were constructed as compared to control formula, specimens were uniaxially pressed at 10 MPa and then cured at room temperature for 7 and 28 days. Non-fired tiles (formula A4, B11, and C17) containing 20% GGC were mixed with 0%, 5%, and 10% RHA. The modulus of rupture can be increased by 87.23%, 48.8%, and 19.4%, respectively, at 28 days of curing as compared to control formula. These results were also coherent with microstructure characterization by scanning electron microscopy (SEM). Furthermore, formula A4 and C17 were selected to compare energy costs with wall tiles fired at 950°C. They were the same amount of energy-saving costs by 5.19 USD/m2. From these results, the new eco-friendly products can produce with a combination of RHA and GGC wastes which can enhance the physical properties due to the pozzolanic reaction. Moreover, the proposed non-fired ceramic tiles can conserve energy and reduce manufacturing costs.