Studying the Possibility of Using Construction Waste to Produce New Concrete and Using Waste in Roads Pavement Design and Studying the Effect of Adding Steel Wires on its Resistance (RCA

Abstract

The main aim of this research is to study the possible use of recycled fine aggregate made from related to construction and demolition (C&D) waste to substitute partially for the natural sand used in the production of cement and sand bricks and paving blocks of Road. On the other hand, the total replacement of recycled aggregate at rates of 25, 50, 75, and 100% resulted in a decrease in resistance by 16.8, 27, 34.8, and 40.7%, In our study, we used fibers with a length of 30-60 mm, We considered the reference sample to be the one with a 50% replacement ratio, and added wires of two different lengths (30-60 mm) and different volumetric ratios (1-1.5-2-2.5%). These samples were compared to reference samples without wires and with a 50% replacement ratio. Concrete reinforced with steel fibers extracted from used car tires showed good results. The characteristic compressive strength value of concrete with 3 cm wires increased by 4.15% at a 1.5% wire ratio, while the increase in strength reached 13% at a 2% wire ratio. Concrete with 6 cm wires increased by 4.15% at a 1.5% wire ratio, and the increase in strength reached 17.52%.