Impact of waste Brick and Limestone Fillers on Self-Compacting Concrete Properties

The present paper discuss the results of an experimental study about self-compacting concretes (SCC) prepared with different mineral admixture (cal,Pz and Br). It was evaluated the effects of the use of the mineral additives on the properties of SCC. Four types of SCC mixes were produced. The amount of cement, fine and coarse aggregate of water and superplasticizer was kept constant for all mixtures. The blended cement (Portland cement + admixture) remained constant at 490 kg/m3 and included 20% by weight of recycled mineral additives. The different between the mixtures done in the 20% of fillers . TheThe rheology of fresh SCC was determined according to the requirements of the 206-9 standard, using the spread (sprawl), L-box, and stability (sieve) tests. The properties of the hardened SCC were evaluated through compression strength tests at 3, 7, 28, and 90 days, physico-thermal properties (λ, Cp, α) at 90 days, and absorption by total immersion at 90 days. The results showed that among the mineral additives used, the incorporation of waste bricks significantly reduced the rheology of SCC. However, ternary mixtures of limestone and waste bricks improved the rheological properties of SCC. Mechanical properties, such as compressive strength and physico-thermal properties, were also influenced by the addition of fillers, although the effects varied depending on the type of additive used. Nevertheless, the ternary mixtures of limestone and waste bricks yielded the best results in terms of strength, porosity, and durability.