INVESTIGATION OF THE STRENGTH OF RUBBER CONCRETE ON THE BASIS OF MODEL OF THE SPECIFIC AREA OF FINE AGGREGATE
Journal Title: Вісник Національного Авіаційного Університету - Year 2018, Vol 77, Issue 4
Abstract
Based on the microscopic analysis of a large amount of rubber cement mortar, a mathematical model was established to qualitatively analyze the specific surface area of the rubber powder-sand mixed with fine aggregate. On the basis of the mechanisms of the influence of the methods of mixing the rubber powder, the size of the particles (rubber powders with a particle size of 20 mesh, 60 mesh, 80 mesh and 120 mesh were used - only 4 species, for testing the resistance of the concrete to the compression), etc., on the specific surface of the adhesion of the fine aggregate with rubber powder, the scientific explanation of the logical differences existing in the process of previous studies of rubber concrete has been given, the in-depth study of the influence of methods and mixing parameters, particle sizes and other factors on the resistance of concrete to compression ha s been carried out. The results show that the negative effect of replacing a fine aggregate of concrete with the same volume of rubber powder on the strength of concrete is much less than the negative impact on the strength of concrete rubber powder mixed with concrete. The size of particles in 60 mesh is a turning point, because the strength of the concrete for compression in the process of reducing the diameter initially decreases, and then increases. The main reason lies in the fact that the specific surface of the mutual contact of rubber particles in concrete is changing. In this paper, with the help of a large number of experimental studies, on the basis of the method of "model of determination of concrete surface area", which uses the coefficient of contact between the rubber mixture and the fine aggregate, an additional study and a deep study of mechanisms of influence on rubber concrete have been carried out.
Authors and Affiliations
He Yulin, Andrii Bieliatynskyi, Valerii Pershakov, Olexandr Dubik
Keywords
Related Articles
- EP ID EP511114
- DOI 10.18372/2306-1472.77.13497
- Views 120
- Downloads 0
PRINCIPLES OF SAFETY MANAGEMENT OF AIR TRAFFIC FLOWS AND CAPACITY UNDER UNCERTAINTY CONDITIONS
Purpose: The aim of this study is to investigate the general principles of safety and capacity management in Aeronautical systems regarding air traffic flows operations under uncertainty conditions. In this work the theo...
CONCEPTUAL DIMENSION OF SYSTEMATIC APPROACH TO THE ORGANIZATION MANAGEMENT
Purpose: The systematic representation of the individual and the organization at the conceptual level is a powerful tool to understand and design an organization as a whole. The systematic approach called...
METHOD OF THE STATISTICAL DIAGNOSTIC OF RELIABILITY OF SHIPS’ EQUIPMENT
Purpose: the purpose of this article is to present the method of the statistical diagnostic of ship onboard electronic equipment reliability, using of probabilis tic model of stream of refuses on the Neyman-Pirson’s p...
AERONAUTICAL ENGLISH: AN ANALYSIS OF SELECTED COMMUNICATION STRATEGIES USED BY NATIVE ENGLISH SPEAKERS IN INTERACTION WITH OPERATIONAL LEVEL 4 PERSONNEL
Aeronautical English differs from general English, so it has to be learned by native speakers of English. The author refers to the particular role this group of speakers is required to play in aviation settings. The arti...
COMPUTER-BASED SYSTEMS OF PHYSICAL EXPERIMENT IN INDEPENDENT WORK OF STUDENTS OF TECHNICAL UNIVERSITY
Purpose: The self-study activity of students is an import ant form of educational process under the conditions of rapid changes of technologies. Ability and readiness of future engineers for independent education is o...