SECONDARY USE OF CONCRETE WASTE IN MANUFACTURING AFTER FILLING NORMAL CONCRETE

Abstract

Concrete is made using cement, water, coarse and fine aggregates. The aggregates used in concrete are mainly sand, pebbles or crushed stone, which are non-renewable natural resource. As a result, the extraction of these resources irreversibly alters the terrain of the land and has a negative impact on biodiversity. Meanwhile, the construction process generates large quantities of waste (demolition waste, unused leftover building materials) that could be reused. One way to use concrete waste is in the production of aggregates. Studies have evaluated the influence of concrete waste on the properties of the new concrete mix and the influence on the properties of hardened concrete (density, compressive strength, water absorption, frost resistance). Crushed and fractionated concrete was used as fine and coarse aggregate, with different amounts being added to the concrete composition.