Investigation of air-entraining influence on the road concrete strength
Journal Title: Вісник Одеської державної академії будівництва та архітектури - Year 2017, Vol 1, Issue 68
Abstract
The article presents experimental data that show how air-entraining affects оn the strength of road concrete. To involve additional air, a chemical additive Sika Mix Plus was used. The studies were carried out on concretes using cements of M500 grades (types CEM I) and M400 (types CEM II/A-S) with different slag contents. It is shown that, regardless of cement grade (types), an increase of the amount of air in the concrete mix leads to concrete strength decrease. The compressive strength of the concrete with increasing air quantity is reduced to a greater extent than the flexural strength. The article gives a possible explanation of this phenomenon. It is based on the fact that the decrease of compressive strength can be explained by the increase the number of defects in the structure of the concrete. First of all the decrease of the flexural strength depends on the quality of the contact zone into which additional air does not enter. It is shown that the strength of concrete on cements containing slag is reduced to a lesser extent than in concrete, on cements without mineral additives. Despite the reduction of strength with an increase in the amount of air, the concrete structure becomes more isotropic.
Authors and Affiliations
S. M. , Tolmachov, O. A. , Belichenko, D. S. , Zakharov
Keywords
Related Articles
- EP ID EP326061
- DOI -
- Views 134
- Downloads 0
BIM: history of development and prospects for implementation
Increasing amount of information necessary to the designer for making design decisions, accelerating the pace of development and construction of buildings and structures has led to the need to develop new technologies in...
Study of the influence of the hardening temperature on the change of strength during compression of modified expanded clay lightweight concretes
The article presents the results of the study of the effect of hardening temperature on the change of strength during compression of modified lightweight concretes. The analysis of the results shows that concretes based...
A study of the of the local energy saving ventilation system effectiveness
Significance of energy saving technologies introduction in the design of new and modernization of old buildings is proved. Work of local energy saving ventilation system for the lecture hall of the University in terms of...
Influence of preliminary cooling of waste gases on energy efficiency of thermal-transformational heat supply system
The authors proposed a new scheme and developed a functional device for a basic system of selecting the heat from waste gases from rotary kilns for industrial and municipal heat supply, which is distinguished by patent n...
Increasing the stability of asphalt concrete coating to formation of rutting
The article considers the issues of increasing the stability of the asphalt-concrete coating to the formation of rutting. In recent years, the load on road surfaces has increased. It is known that the quality of bitumen...