10.24411/1728-323X-2019-12069

Geoecology

THE USE OF FINE CONSTRUCTION SAND AND TECHNOGENIC WASTE IN CEMENT COMPOSITIONS

1. O. A. Chumakova, Senior Teacher of the Department of Engineering Ecology,
2. FGBOU VO "Penza State University of Architecture and Construction", This email address is being protected from spambots. You need JavaScript enabled to view it., Penza, Russia

The main advantage and motivation of the new generation of powdered concrete is the possibility of using crushed or sifted fine fraction of quartz sand. The limited area of use of fine natural sands, almost unclaimed in the technology of traditional concrete, requires the expansion of their rational application. The presence of a predominant amount of quartz in the construction sand, which significantly activates its properties during grinding, increases the reactionary and chemical activity of the dispersed quartz particles. The formation of the structure of cement compositions modified by crushed construction sand is due to the formation of calcium hydrosilicates. The article presents the results of the use of fine construction sands and man-made waste in the structure of cement compositions. It is shown that the integrated introduction of sand and man-made waste can improve the strength of the new generation of concrete and expand the use of fine construction sand deposits of the Penza Region, which contributes to significant resource conservation and development of the eco-industry in construction.

structure, cement compositions, industrial waste, construction sands, concretes, properties, density and strength.

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