High-strength lightweight concrete mixtures based on hollow microspheres: technological features and industrial experience of preparation

Autor:	A S Inozemtcev
Rok vydání:	2015
Předmět:	Engine power Engineering Compressive strength Oscillation business.industry Mechanical engineering Treatment time business Turbine Microsphere
Zdroj:	IOP Conference Series: Materials Science and Engineering. 71:012028
ISSN:	1757-899X
DOI:	10.1088/1757-899x/71/1/012028
Popis:	The research results concerning dependencies between technological parameters and physical properties of structural lightweight concrete are presented in the article. High-strength lightweight concrete has unique performance characteristics: low average density (less than 1500 kg/m3) and high compressive strength (more than 70 MPa). Hollow alumina-silicate microspheres with nanoscale modifier are used for obtaining these properties. It is shown in the article that the preparation of high-strength lightweight concrete in industrial conditions must be implemented using a turbine mixer having six paddles and engine power more than 39.2 kW. Oscillation frequency of more than 3000 rpm, vibro-compacting time less than 15 seconds, heat-humid treatment temperature approximately 60-65 °C and heat-humid treatment time 6-7 hours are optimal for production. The results of industrial mixing-test are presented.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::39e9d0c14c43e0b793ee5e27a68ecd42 https://doi.org/10.1088/1757-899x/71/1/012028 Zobrazit plný text záznamu