Abstract
Thang Long bridge, after many years of operation with increasing traffic volume, leads to the steel face plate of the bridge not ensuring the conditions of stiffness and deflection within the allowable limit. After scientific conferences and experimental studies, it was shown that the solution "using Ultra High Performance Concrete (UHPC) technology associated with orthogonal steel decks to form composite lightweight deck slabs" design selection to repair Thang Long bridge deck. In order to successfully apply UHPC coating in this project, it is necessary to determine the technological parameters such as: flow, setting time, rheology and shrinkage according to actual construction conditions at site ( temperature and humidity). In addition, other physical and mechanical properties of UHPC must be determined such as compressive strength, tensile strength, elastic modulus and dry shrinkage. This study has determined the technological parameters for the construction of UHPC coating during the period from August 25, 2020 to December 31, 2020 to meet the technical requirements of the Thang Long bridge deck repair project.
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