Study of physical - mechanical indicators of the application of complex modifiing additive kmd "Navikon" in concrete mixtures

Abstract

Monolithic construction is developing, and every day concrete acquires more and more specific characteristics: faster or slower, depending on the need, they gain strength; become resistant to low temperatures; become waterproof; different colors and shades; protect steel structure elements from corrosion; gain resistance to aggressive environments and durability, without losing their physical properties. The key to everything is a complex chemical additive, which is added to concrete during its production or to the finished concrete mixture. The use of the additive will significantly increase the profitability of concrete mixtures, because the introduction of a complex chemical additive developed jointly with the Navikon-Ukraine company will improve the physical characteristics of concrete, significantly reduce the cost, and increase the quality by an order of magnitude.

NavyCon KMD  is a complex of mineral chemical modifiers for improving the hydro-technical and physicomechanical properties of concrete and construction solutions used in civil and industrial construction, tunnel construction, the repair and restoration of bridges and overpasses, road construction, particularly in the manufacture of paving slabs with increased strength, waterproofing and frost resistance, to obtain a concrete mixture of high plasticity and homogeneity; increased strength of concrete and concrete products; increases their waterproofness, frost resistance, gas permeability, and resistance to abrasion and sulfate corrosion in conditions of high humidity and significant temperature changes. It can be used for the production of dense artificial products in the form of pipes, segments, blocks, tiles, and other products used in conditions where increased waterproofness and frost resistance are required. The use of Navikon KMD in the composition of concrete, and cement-sand mixtures increases their waterproofing capacity by three to four degrees, allows to exclude additional waterproofing of structures, and gives them increased strength, frost resistance, and resistance to the influence of aggressive environments.

The effect of the complex modified additive Navikon KMD on the mobility of the concrete mixture and the strength of concretes, which are widely used for the production of precast reinforced concrete structures, is investigated in the work. It was established that the use of the additive leads to an increase in the grade of ease of placement of the concrete mixture by three degrees, from P1 to P4 (OK from 1-4 cm to 16-20 cm) relative to the control mixture. It was established that the additive meets the criteria of highly plasticizing and super water-reducing additives. The additive of KMD "Navikon" makes it possible to significantly increase its strength from 30 to 50% and water resistance and transfer ordinary heavy concrete to the category of hydraulic concrete.