BASIC REQUIREMENTS FOR THE INSTALLATION OF GRAVEL AND MASTIC EXPANSION JOINTS ON BRIDGE STRUCTURES

The article deals with the technological process of arranging crushed stone and mastic expansion joints on bridges, which are important elements for ensuring stable and safe operation of bridge structures. The main attention is paid to the peculiarities of using crushed stone and mastic materials that provide high elasticity, strength and waterproofing, which allows compensating for deformations caused by mechanical loads and temperature fluctuations. The article describes the stages of such joints, starting from the preparation of the base to the laying of materials, and also notes the importance of choosing the right components for the production of crushed stone and mastic mixtures. The basic requirements for materials, such as crushed stone, mastics and special additives, which ensure long-term operation of the joints even in difficult climatic conditions, are considered. The article pays special attention to the technology of laying crushed stone mastic joints, which includes thorough cleaning of the joint, uniform distribution of materials, and control over their quality during installation. Technological procedures are described, such as the use of primers to improve adhesion, reinforcement of joints to increase their mechanical properties, as well as checking the tightness and strength after the work is completed. In general, the article contributes to a deeper understanding of the technology of arranging crushed stone-mastic expansion joints, which is an important tool for ensuring the safety and durability of bridge structures.