ВИКОРИСТАННЯ ГОТОВИХ УЩІЛЬНЮВАЧІВ ШВІВ В ЦЕМЕНТОБЕТОННИХ ПОКРИТТЯХ АВТОМОБІЛЬНИХ ДОРІГ І АЕРОДРОМІВ

Abstract

Increased requirements for reliability, performance and durability of pavement caused by the increase in vehicle carrying capacity and traffic on the roads. As the domestic and world experience shows, the increasing requirements of the movement are best matched by cement concrete pavements. Stable transport transport performance, high durability give them advantages over pavements built using organic binders. During construction and reconstruction, longitudinal and transverse joints for various purposes are arranged in cement concrete pavements of roads and airfields to prevent deformation and destruction of coating pavements (cracking, chipping of corners and edges of slabs, peeling of the concrete surface layer, the appearance of potholes and sinks, vertical displacement of slabs and their warpage destruction of butt joints and joint fillers). The destruction of pavements, as a rule, takes place in cases where the stresses and deformations arising in the plates exceed the permissible values, as well as in case of failure of the sealing of joints and cracks. Restoring the sealing of expansion joints and cracks are important stages of work to extend the operational life of pavements. A large role on the efficiency of the sealant in the joints and its service life is provided by the deformability of the sealing materials. When choosing a type of sealant, the possible maximum negative and positive air temperatures of the region where the pavements are used are taken into account. Currently, unique sealing materials using polymer compositions have been created. These materials have high technical and operational characteristics and a guaranteed service life of at least 5 years. The sealing or filling of transverse and longitudinal joints in cement concrete pavements is an important factor in ensuring long-term performance of the coating. The experience of using different types of joint sealing materials shows that their proper installation can provide important protective equipment that improves the performance of joints and pavements. In recent years, in foreign practice, the technology of pressing elastic whole or porous rubber profiles into the seam is very often used for sealing joints. In this case, it is possible to carry out work even in wet weather and at low temperatures. Special machines have been developed for the installation of profiles. The article discusses the sealing of transverse and longitudinal seams of cement concrete pavements of roads and airfields with sealing materials, including ready-made seals, the need to use them and study the effect of sealing materials on the design of joints and operational performance of cement concrete coatings in general.