DEVELOPED MODIFIED ADDITIVE IMPACT EVALUATION ON THE CONCRETE STRENGTH CHARACTERISTICS

Abstract

The article represents of the laboratory researches of the complex modified additive impact, especially effect of variable value components of the additive on concrete strength characteristics. This article is dedicated a solution of the problem of enhancement operating characteristics of concrete as a result of adding composition of the additive. In this article, a modified additive (CMA) developed by the authors of the article is used as an additive were used post-alcohol bard-PAB (waste product of ethanol), sodium compounds (NaOH), and curing accelerant (gypsum) in different percentage ratios. To evaluate strength changes, samples have been made and were tested with compression and bending at 3, 7, 14, 21 and 28 days of the normally-moist curing. An experiment result demonstrated by adding an additive - plasticizer (PAB) has reduced the quantity of water to 35%, improving concrete strength up to 20%. Research reveals of the additives impact on the characteristics of the concrete during its manufacture. Consequently, adding additive (CMA) to the composition for concrete allows enlargement the strength after 28 days of curing up to 4.5-39% relative to the reference sample (Type 1). In accordance with the research results of the additive intensifies curing and was found to contribute to the enlarge of strength, both in early period, and at 28 days (design age). Experimental results revealed that the application of plasticizers is expedient from perspective quality improvement parameters of the compositions. Plasticizer in concrete mix significantly improves the resistance and durability of concrete. Consequently, the application of a modified additive enables to purposefully change the structure of heavy concrete and thereby significantly enlarge the complex of mechanical and physical parameters of modified heavy concretes.