Self-compacting Concrete with Recycled Aggregates

The article presents an experimental study on self-compacting concrete prepared by using different percentages of recycled aggregates, in order to obtain a sustainable and environmentally friendly self-compacting concrete. For this purpose, ten different compositions of self-compacting concrete were made. The main recipe used for comparing results has been discovered from trial and error using the recommendations from the Eurocode. After the recipe was obtained the replacement of cement, limestone and fine aggregates had been made with the following recycled materials: fly ash, blast furnace slag, crumb rubber and brick dust in different percent and replacing different materials as presented in Table 7 . The influence of the type and dosage of recycled aggregates is discussed. The main objective of the article was to analyze the properties of self-compacting concrete prepared with these recycled materials. In order to have the possibility to certify the difference between the ten recipes no changes had been made from one recipe to another except variations of water and super plasticizer quantity for obtaining SCC due to the different absorption by the recycled material. The w/c ratio varies from 0.38 to 0.63 and the superplasticizer varied from 0.8 to 1.3 % of the cement.