Evaluación de las propiedades físicas y mecánicas de concretos autocompactantes de altas prestaciones con la inclusión de fibras plásticas normalizadas y recicladas

Abstract

Self-compacting concrete (SCC) is defined as concrete that is flowable and compacted by the effect of its own weight inside densely reinforced molds. The thesis "Evaluation of physical and mechanical properties of high performance self-compacting concrete with the inclusion of standard and recycled plastic fibers" aims to merge SCC and plastic fibers. These could be recycled and standardized fibers. They are added to self-compacting concrete with the intention to check and compare their physical and mechanical properties in fresh and hardened state. Focused on obtaining the best dosage by the behavior depending on the properties analyzed. In order to meet the goals an experimental design was used as a tool. It involved two factors at three levels generating a 3k factorial design. The dosage used as baseline SCC (not including fiber) rose from an existing dosage of a high-strength concrete. Varying only the W / C and the amount of additive. Nine different dosages are proposed as the result of the factorial design. Every dosage with different amount of plastic fibers whether commercial, recycled or both. The following mechanical properties in SCC: compressive strength, modulus of elasticity, Poisson's ratio, settlement, ultrasonic propagation speed and modulus of rupture were analyzed. After analyzing the results with an analysis of variance and multivariate ANOVA to find if statistically significant variance exists or not. Each property studied the influence of the type and amount of fiber. Additionally, experimental results are represented in response surfaces.