Influence of monolithic plate manufacturing technology on physical and mechanical characteristics of the coating

Abstract

During operation in an open atmosphere, bridge structures are exposed to extreme natural and climatic conditions, chemicals and constantly changing temporary and dynamic loads. Bridge structures built in the 60s and 80s of the last century have approached a critical situation and require major repairs. Goal. The most vulnerable elements of the bridge structure are the upper part of the concrete span structures (slab) and waterproofing, so there was a question of strengthening the slabs and replacing the waterproofing layer. Metodology. When forecasting the durability of bridge structures, it is necessary to take into account the influence of temperature and humidity and climatic factors together with force factors. Result. The real necessity of mounting a monolithic reinforced concrete slab for strengthening a top slab of girder structures and putting a new waterproofing layer on it is shown. Originality. The technology of spraying a waterproofing layer that allows to waterproof a surface of any complexity evenly and reliably is offered. Practical value. Overhead monolithic slab enhances the bearing capacity of the power elements of the bridges and can be increased by 1.5–2 times.