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The consumption of polymeric materials and their waste increases considerably throughout the world, leading to a constant concern with alternative recycling routes. Polypropylene (PP) is one of the most produced, but it is not recycled in an expressive way. A significant amount of research has been conducted to reuse discarded material into new composites, especially the cementitious ones, combining environmental, economic and technological issues. Nondestructive tests, such as ultra-pulse velocity, can be used to characterize and estimate the physical and mechanical properties of cement-based materials. This work investigates the effect of partial replacement of natural aggregates (NA) by recycled PP aggregates (PP-RPA) on pulse velocity and physical-mechanical properties of mortars and their correlations. Coarse particles of PP (at 4 -10 US-Tyler and 10 – 20 US-Tyler) provided better mechanical behaviour to composites made with fine particles (20–50 US Tyler), the latter being largely affected by the presence of pores. Ultra-pulse velocity can be used to predict the physical and mechanical properties of mortars containing PP aggregates.

CORRELATIONS ON ULTRA PULSE VELOCITY AND PHYSICAL-MECHANICAL PROPERTIES OF CEMENT MORTAR CONTAINING QUARTZ AND RECYCLED-PP AGGREGATES