This section describes some of the practical observations made during the full-scale projects carried out in the project. Based on these observations, some recommendations are given for the use of SFRSCC.
The first project was carried out in Aalborg. Here, a foundation slab was cast with SFRSCC. The fibre length, aspect ratio and content were 60 mm, 80, and 30 kg/m3, respectively.
The second project was carried out in Slagelse. Here, an underpass was executed, where the strip foundations and the walls were cast with SFRSCC. The bridge deck was cast with SFRC. The steel fibre length, aspect ratio, and content were 60 mm, 65, and 40 kg/m3, respectively.
The third project was carried out in Herning. Here, a precast concrete bridge was executed. The bridge consists of six concrete elements. SFRSCC was applied in one of the two edge beams. The fibre length, aspect ratio, and content were 60 mm, 65, and 40 kg/m3, respectively. Otherwise, the reinforcement of the edge beams was identical. The aim was to provide the opportunity to study long term durability aspects of SFRSCC in full-scale. Furthermore, the project focused on the joints between the concrete elements. In two of the joints, an alternative solution was investigated using steel fibre reinforced high strength concrete. Due to a very high bond strength, it is possible to reduce the anchor length of the reinforcement bars. Thus, it is possible to reduce and simplify the reinforcement configuration in the joint. Compared to normal strength concrete, the concrete composition of high strength steel fibre reinforcement is significantly different. Coarse aggregates are not included and the steel fibre content is significantly higher - in this case 363 kg/m3. The fibre length and aspect ratio were 12.5 mm, and 41.7, respectively.
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