additives

The paper presents research of brittleness cement blends with siliceous additives using impact strength. The advantages of the developed method are simplicity of definition, low cost of equipment and operation. In the presented research were studied additives on the basis of finely ground glass obtained from waste glass containers and pozzolanic additives as fly ash, silica fume and synthetic silica. Increase in additives amount in respect to the cement mass reduces brittleness by ~10 % after 28 days of curing.

The article is devoted to obtaining a porous filler from the slag of the Thermal Power Plant and investigation of the filtration method for the drying of slag and clay as main raw materials for preparing the charge for porous filler production. 

One of the possible ways of restoring and further effective development of the construction industry with small investments is to expand the production and use of low-energy nonclinker binders. The use of gypsum and gypsum-cement-pozzolanic binder, obtained with the use of various waste and related products from other sectors of the national economy is perspective in this direction. It provides an increase of binders` required properties and improves their technical and economic indicators, solving to a certain extent the problems of ecology.

Based on the analysis of the issued for the past 15 years scientific papers dedicated to scientific aspects of the engine oil improvement and taking into account the requirement to oil performance resulting from economical and ecological factors, an attempt to formulate the scientific principles for engine oil formulations has been made.