COMPLEX LABORATORY STUDIES OF MODIFIED ADDITIVE INFLUENCE ON CONCRETE PHYSICAL AND MECHANICAL PROPERTIES

Aliya Altynbekova

2022

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DOI 10.21660/2022.100.3641
Data confidence 70 medium
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Abstract

The article presents a complex of laboratory studies of the influence of a complex modified additive (CMA), exactly the effect of the variable composition of additive components on the physical and mechanical properties of concrete.This work shows the methodology of making samples, the selection of additive composition at different percentage ratios of components, and the comparative analysis of the obtained results.The work is devoted to solving the problem of increasing the performance characteristics of concrete by adding the composition of CMA.In this work, the authors used the developed CMA including alkali (caustic soda NaOH), post-alcohol bard (alcohol production wastes), and hardening accelerator (gypsum) in different percentages.Studies can identify the impact of additives on the properties of concrete during their production.Thus, the addition of CMA to the composition of heavy concrete can increase the strength at 28 days of hardening by 4.56-39.08%compared to the reference sample.The analysis suggests that CMA provides a reduction of water saturation in concrete by 2-4 times.The obtained concrete with CMA withstood 200 cycles of tests for frost resistance.The experimental data indicate that the studied additive forms the optimal structure reduces water saturation and increases the strength properties of concrete.This makes it possible to expect higher operational properties of heavy concrete -frost resistance, therefore, increasing its durability.