United Cement Group (UCG) is the largest cement producer in Uzbekistan and countries of Central Asia. UCG companies carry out large projects on modernization of production, and preparation to launch new processing lines is in progress. By the end of 2022 it is p...
In December 2022 the Angarsk cement and mining works, a division of the Siberian Cement holding company, celebrates its 65th anniversary. The article describes the history of the company, implementation of large-scale investment projects in recent years, provides inform...
Russian construction industry sets the requirements to the market of construction materials and concrete, in particular, the requirements dictated by the current conditions of its development are to increase the average class of concrete, to reduce the carbon footprint ...
The provision of laboratories with modern equipment became more complicated, which made it necessary to change the delivery channels used by OOO RVS. The article gives examples of upgrading testing machines, Vicat needle apparatus and mortar mixers manufactured by TESTI...
A number of modernization projects implemented at the Rybnitsa cement plant are described. The control over transportation of the milled raw materials into the mixing silos and raw meal delivery into the feed bins of the rotary kilns is automated. Heating systems for el...
Modelling of the aspiration modes of a ball tube mill taking into account the thermal and moisture conditions of grinding a multicomponent charge containing clinker, gypsum and slag is discussed. Equations for calculating the following indicators are obtained: the parti...
| Author: V.S. Bogdanov, S.I. Antsiferov, D.V. Bogdanov, O.I. Bazhanova, E.A. Sychev |
| Section: Equipment and technology |
| Keywords: ball-tube mill, aspiration, batch mixture, moisture content, temperature, particle size, velocity, negative pressure |
The paper presents the results of studies of the use of colloidal additive produced by hydrolysis of Portland cement to modify the cement matrix. The method for obtaining this additive has been developed, its optimum dosages established, the mechanism of cement hydratio...
According to the results of many studies and the provisions of standards, it is recommended to make frost-resistant concrete only on the basis of Portland cement with obligatory air entrainment. However, the recent research has shown that a high degree of water content...
| Author: I.M. Ivanov, L.Ya. Kramar, K.V. Shuldyakov |
| Section: Waste utilization |
| Keywords: freeze-thaw resistance, frost fracture mechanisms, ground granulated blastfurnace slag, Portland blastfurnace slag cement, water-cement ratio, cement matrix, structure, calcium hydrosilicates, durability |
Blended Portland-PFA cement made of basic coal fly ash from TPPs of Kansk-Achinsk basin has been examined. The main parameters of the composition and production process of such cement were identified, taking into account the deformations of ash-cement matrix after steam...
The article provides information on the trends of development of the Russian market of crushed stone: the pattern of consumption from 2004 to 2022, specifics of production in terms of seasonality and regional distribution, prices and financial performance of the industr...
