Investigation of Different Superplasticizers Effect on Workability and Strength Parameters in Ultra High Performance Concretes

The use of ultra-high performance concretes (UHPC) in the modern construction industry is increasingly widespread. UHPCs are a type concrete that provides advantages solving many engineering problems. have superior properties compared to conventional terms workability, self-settling, as well high strength and durability. However, although advantages, achieving desired workability one biggest challenges production procedure, since they contain amounts powder materials. Therefore, aim this study determine most suitable superplasticizer (SP) additive by using different SP additives UHPC mixtures. In study, parameters were tested on mixtures 8 additives. First all, spreading diameters obtained measured. For each mixture, compressive strength, density, ultrasound velocity, Schmidt hammer rebound Leeb hardness measurements performed 70x140 mm sized cylindrical samples taken days 2, 7 28. Since SPs working principle at interfaces particles internal structure concrete, behaviors observed even if little. All results been with literature it has proven meet specifications.