Mortars with CDW Recycled Aggregates Submitted to High Levels of CO2

Construction and demolition wastes (CDW) are generated at a large scale have diversified potential in the construction sector. The replacement of natural aggregates (NA) with CDW recycled (RA) materials, such as mortars, has several environmental benefits, reduction resources used these products simultaneous prevention waste landfill. Complementarily, to capture CO2 since some their components may carbonate, which also contributes decrease global warming potential. main objective this research is evaluate influence exposure RA produced cement factories its effect on mortars. Several mortars were developed volumetric ratio 1:4 (cement: aggregate), NA (reference mortar), exposed high levels (CRA). two types aggregate incorporated, replacing 50% 100% (in volume). non-carbonated CRA from analysed, accounting for performance fresh hardened states terms workability, mechanical behaviour water absorption by capillarity. It was concluded that (both RA) generally present good non-structural purposes, although they suffer moderate when replaced RA. Additionally, small improvements found subjected curing short period (5 h), while long carbonation d) led performance, contrary results obtained literature indicate significant increase characteristics. This difference could be because focused made-in-laboratory aggregates, while, research, came real activities, thus older more heterogeneous.