Sayrakhmonov Rahimjon Huseynovich,  Muminov Abduhakim Karimovich, Hasan Mahmadiyor Bokimahamad, Rakhmatzoda Alisher Sunat

Annotation:

This article examines the advantages of cement concrete coatings in comparison with asphalt concrete coatings in the operating conditions of the Republic of Tajikistan. It is considered that the main obstacles to the widespread introduction of cement-concrete coatings in Tajikistan are the high cost of cement, the shortage of technical equipment and the lack of an adapted regulatory framework. The solution to these problems can be the use of modified cements with mineral and chemical additives, as well as the use of local natural and industrial resources. It is shown that the use of modifying additives for various functional purposes, such as wollostonite, fly ash, lignosulfonate and cotton extract, can significantly improve the performance characteristics of cement systems: increase strength, frost resistance, crack resistance and water resistance, as well as reduce cement consumption and the cost of concrete mixtures. It is also considered that modern problems of strength and durability of road concrete are caused by porosity, shrinkage, sulfate aggression and frost cycles. Solving these problems requires a comprehensive approach: optimizing the composition, using effective additives, proper styling technology, and quality control at all stages.

Keywords: cement, high-strength concrete, additive, plasticizer, concrete mix, wollastonite, ash, strength, corrosion resistance.