Deformational behavior of self-compacting concrete containing recycled aggregate, slag cement and green powders under compression and bending: Description and prediction adjustment

The high fine-aggregate content of Self-Compacting Concrete (SCC) means that its deformational behavior differs from vibrated concrete. SCC performance is further altered when industrial by-products are used as raw materials in those fractions. In this paper, the aim to analyze and model under compression bending containing 100% coarse 0%, 50%, fine Recycled Aggregate (RA), limestone RA green aggregate powders sized 0/0.5 mm, Ground Granulated Blast-furnace Slag (GGBS) cement. After fresh mechanical characterization 18 mixes were produced, their compressive stress-strain load-deflection curves determined by continuously recording applied load strain/deflection values test specimens. yielded deformability levels accordance with international standards, while higher contents increased deformation reduced it flexural stress. stiffness GGBS was added, due adjustment proportion cementitious matrix, use powder and, especially, had opposite effect. Both strain deflection underestimated existing theoretical models. However, incorporation models both exponential correction coefficients, dependent on content, partial types cement powder, produced optimal fits experimental curves. view behavior, which successfully modelled maximum deviations ±10%, may be combination although recommended should not exceed proportions 50%.