STUDY OF THE INFLUENCE OF FILLER BASED ON PORCELAIN WASTE ON PHYSICAL AND MECHANICAL PROPERTIES OF HOT FINE-GRAINED ASPHALT CONCRETE

The results of research are presented when replacing finely crushed mineral part of asphalt concrete with waste from the production of porcelain stoneware, which is a product of high-temperature firing of a mixture of refractory clay raw materials and feldspar rocks, which provides high physical and mechanical properties of waste and further road surface.

Low-Energy-Intensive Technology For Obtaining Sulphiro-Iron Clinkers And The Properties Of Cement Based On Their Basis

The results on the development of highly reactive compositions of raw mixtures and low-power technology for obtaining sulfo-iron clinkers of low-temperature firing with integrated use as components of natural and man-made waste, study of the properties of cements based on them are presented.

Porcelain Enamel Coatings

Porcelain enamel is an inorganic-type coating, which is applied to metals or glass for both decorative and functional purposes. This coating is a silica-based solidified glass mass obtained by high-temperature firing (temperature can range between 450 and 1200 °C depending on the substrate). Porcelain enamel coatings differ from ceramic coatings mainly by their glass structure and dilatation coefficient, and from organic paints mainly by the inorganic nature of the matrix and the chemical bond that exists between the coating and the substrate.

INFLUENCE OF THE ALUMINUM OXIDE ADDITIVE ON THE PHASE COMPOSITION OF MULLIT-FORMING ALUMINOSILICATE MINERALS

The aim of the research is to determine the effect of alumina on the phase composition of shale of the Jerdanak deposit and the quartz-pyrophyllite rock of the Baynaksay deposit during high-temperature firing. X-ray phase analysis determined changes in the phase composition of rocks with additives from 5 to 20% aluminum oxide as a result of firing at 1300 and 1400 °C. A comparative analysis revealed the absence of cristobalite formation, a decrease in the quartz content, and an increase in the amount of mullite for shale samples. No positive effect of alumina additives on the phase composition of quartz-pyrophyllite rock was found.

TECHNOLOGY OF ASBESTOS-TEMPERED POTTERY MAKING: FORMULATION OF THE PROBLEM AND PROGRAM OF EXPERIMENTS

There is a common idea in publications about pottery traditions and cultural and historical processes in Eastern Fennoscandian Neolithic that the tradition of asbestos-tempered pottery was spread so widely and for such a long time due to the technological advantages of this temper. On the one hand, this idea contradicts the notions on conservativeness and traditionality in ancient pottery making. On the other hand, we can confidently state that asbestos as a temper had a certain non-functional value. At the same time, we cannot deny the functional advantages of asbestos without carrying out relevant experiments. One can prove or deny the mentioned hypothesis by comparing the characteristics of asbestos as a temper with other materials, first of all, crushed stone and bird down. According to the preliminary program of the experiments to answer all the main questions about asbestos as tempering material one should make at least 60 experimental vessels and the same amount of small experimental models, produce low, medium, and high temperature firing and run all the necessary tests. The experiment turns out to be quite lengthy and labor intensive, but quite manageable in case of proper preparation.