Abstract
Modern approaches to the formation of new generation concretes make it possible to replace part of the fine aggregate with finely ground mineral powders, which are by-products of metallurgical and chemical industries, the construction industry, as well as various substandard quartz sands. In the studies carried out, metallurgical slags (MS), broken glass (BG), dust from gas cleaning of metallurgical production (DGCMP), and ground quartz sand (GQS) were used. The aim of the study is to obtain an optimal flow rate of a hydraulic binder by forming an optimal cement matrix. The dosage of finely ground powders varied in the range of 20-49 % of the portland cement consumption. It has been established that the most acceptable finely ground mineral powders in compositions for the production of vibropress products are: quartz ground sand, metallurgical granulated slag of blast furnace production, gas cleaning dust and ground glass. Powders obtained on the basis of glass scrap can be considered as an additional raw material base in the production of materials for road-building purposes. Operational properties such as water absorption and the rate of concrete curing indicate their prospects. However, the economic costs of collecting, sorting glass, obtaining a powder with a specific surface area of 3000 cm2/g are not reasonable at this point in time.
Highlights
Modern production of concrete based on Portland cement is not complete without the widespread use of fine powders, including fine powders
It has not been established with high reliability how to control the properties of composite materials in a targeted manner by changing the filling of the cement matrix and reducing the proportion of Portland cement in the system [1, 7]
Micro fillers were used as a complex in an amount of 21-49 % to replace Portland cement by weight
Summary
Modern production of concrete based on Portland cement is not complete without the widespread use of fine powders, including fine powders This trend has been seen since the late 60s of the twentieth century. It has not been established with high reliability how to control the properties of composite materials in a targeted manner by changing the filling of the cement matrix and reducing the proportion of Portland cement in the system [1, 7] Vibrocompressed concrete with fillers based on mineral powders will provide both economic and environmental effects for the region and business
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