Utjecaj sastava mješavine samozbijajućeg betona na robusnost

Abstract

Effect of mix proportion on robustness of self-compacting concreteAn experimental program aimed at evaluating robustness of four distinct types of selfcompacted concrete (SCC) is presented in this paper. A control mix was designed and three series of mixes were made, with variation of principal fresh mix properties. In order to evaluate robustness, the selected mixes were subjected to variations in water content. The tested mixes were then ranked using the multi-attribute decision making method. The results indicate that the reduction in segregation resistance, and the decrease in the obstacle passing ability, lead to a considerable decrease in robustness of self-compacting concrete.Key words:self-compacting concrete, robustness, mix proportion, multi-attribute decision making Prethodno priopćenje Parviz Ghoddousi, Amir Masoud Salehi Utjecaj sastava mješavine samozbijajućeg betona na robusnost U ovom radu prikazan je eksperimentalni program ocjenjivanja robusnosti za četiri različita samozbijajuća betona (eng. Self Compacting Concrete -SCC). Projektirana je kontrolna mješavina te tri serije mješavina s razlikama u osnovnim svojstvima u svježem stanju. Za ocjenu robusnosti u odabranim mješavinama se mijenjala količina vode. Ispitane mješavine su zatim rangirane primjenom metode višeatributnog odlučivanja. Rezultati pokazuju da smanjenje otpornosti na segregaciju i smanjenje sposobnosti zaobilaženja prepreka uzrokuje značajno smanjenje robusnosti samozbijajućih betona.