In Central European conditions, a deck of a concrete bridge usually consists of several layers with specialized functions: load-bearing reinforced concrete slab, adjusting layer, waterproofing layers (asphalt or polymer) and riding layers (bitumen or concrete). The concept where all the functions are integrated into one layer (called “unprotected concrete bridge deck – UCBD” in this paper) is rarely used. This is mainly due to lack of experience with materials and structural solutions suitable for this type of structures. This paper deals with the development and pilot application of a material for UCBD structure in the Czech Republic. Considering the requirements on the structure and the material, polymer fibre reinforced concrete (PFRC) was selected as the most suitable alternative. The composition of the material was optimized during an extensive experimental program, which included tests of slump, air content, compressive strength, flexural strength, elastic modulus, resistance to water with deicing chemicals, depth of penetration of water under pressure, abrasion resistance, chloride ingress and shrinkage. The developed material was then applied on a small-span bridge on a local motorway. The structure and the construction process are also briefly described in the article. The pilot structure will be subjected to long-term monitoring with the aim to verify the reliability of UCBD concept with the use of the developed PFRC. Life-cycle costs analysis will be carried out to assess the economic efficiency of the solution.

polymer fibres, fibre reinforced concrete, riding surface, unprotected bridge deck