Experimental Investigation on the Effects of Recycled Pavement Materials on the Performance of Self-Compacting Concrete

Abstract

Development and research of new compositions of Self-Compacting Concrete (SCC) based on Recycled Aggregates (RA) and Recycled Pavement (RP) are primary objectives for builders. These aggregates must be suitable to produce an SCC with properties acceptable for short and long term. This study presents experimental work focusing on the properties of SCC obtained by the addition of 15%, 30% and 45% of RP to the Natural Aggregates (NA), both in the fresh and hardened states, such as slump flow, T500 spread time, V-funnel flow time in the fresh state, Flexural Strength (Sf), Compressive Strength (Sc), Sorptivity (S), Water Absorption (WA) and Porosity (P) in the hardened state. These properties have been investigated and analysed in detail. The results indicate that the use of NA with that of RP up to 30% retains almost the same properties of the SCC. Moreover, the relationship-based equations that express the variation of Sc and other parameters give fair correlation coefficients, which are close to the value of one. Consequently, it is recommended to use RP with well-determined quantities for manufacturing better SCC, which allows the recovery, recycling and valorization of large quantities of RP.