The influence of the glass powder dispersion and its amount on the operational properties of glass-reinforced concrete is investigated. Box and plate glasses, which were crushed and ground in a ball mill, were used as the starting material. Portland cement manufactured by Serebryakovcement, a brand of CEM IIA 42.5N, was used as a binder. The developed technology for the glass-reinforced concrete manufacturing provided at the final stage for a joint grinding of Portland cement and glass powder. At the same time, the specific surface area of Portland cement increased from 3200 to 6500 cm2/g. The optimum amount of fine glass powder in glass-reinforced concrete is established. It is shown that at the content of 30 wt.% glass powder with a dispersion of 5872 cm2/g the glass-reinforced concrete density is 1915 kg/m3 and the compressive strength is 45.09 MPa. When superplasticizer is introduced into glass concrete, a synergistic effect is observed, as a result of which the compressive strength increases to 50.88 MPa. Using the synchronous thermal analysis, the effect of finely dispersed glass powder on phase transformations in glass-reinforced concrete under non-isothermal heating conditions was studied. It was shown that the processes of ettringite dehydration in glass-reinforced concrete are shifted to the region of high temperatures, and the processes of calcium hydro silicates dehydration and calcite destruction are shifted to lower temperatures.
The glass micro balls based on glass domestic waste for road construction were obtained. Glass micro balls will reduce the contamination of road marking and increase its light-reflective ability at night. Colorless and colored container glass, as well as lead crystal, was chosen as the starting material for producing glass micro balls. An electric arc plasmotron UPU-8M was used to produce glass micro balls. Pre-crushed fractionated glass together with plasma-forming gas – argon was fed to the powder feeder and from the feeder to the plasma burner. Under the influence of high plasma temperatures, about 9000-12000K, the particles were melted, followed by cooling in the outgoing flow of plasma-forming gases. Due to high-temperature plasma exposure, partial evaporation of alkaline oxides and lead oxide occurred. Glass micro balls were enriched with the oxides of silicon, aluminum and calcium. This helped to increase the acid and alkali resistance of glass micro balls. The micro hardness, density, and refractive index of glass micro balls were studied. It is shown that glass micro balls have an ideal spherical shape and are x-ray amorphous. Glass micro balls are recommended for use in road construction as a reflective element of road marking.
An innovative energy-saving technology for producing block foam glass with a protective decorative coating has been developed, including the preliminary application of an intermediate heat resistant coating followed by the application of the main coating and the plasma jet melting. The optimal composition of the intermediate heat resistant coating, its preparation technology and laying on the front surface of the foam glass block are determined. It is shown that the main factor shaping the quality of the foam glass insulating block with a protective decorative coating is the speed of the plasma burner movement with a plasma jet on the front surface of the foam block glass with a preliminary applied two-layer heat resistant protective decorative coating. The formation regularity of the front layer texture of a protective and decorative coating on the plasma jet speed to the enclosing foam glass block has been established. It is shown that at the optimum plasma processing speed of 10 mm/s, a continuous, high-quality protective and decorative coating is formed. The features of the phase composition and microstructure of a multilayer heat resistant protective decorative coating are investigated. It is established that the surface layer is represented by an amorphous vitreous phase.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.