Experimental evaluation of the use of crushed concrete rock in the structures of bicycle paths in the city of Tashkent

Abstract

In the context of sustainable urban development and the implementation of circular economy principles,
the rational use of construction and industrial waste has become increasingly important. This study is
devoted to an experimental investigation of the feasibility of using recycled aggregate obtained from
crushed concrete waste in the construction of bicycle paths in the city of Tashkent. Laboratory tests were
conducted to evaluate the physical, mechanical, and performance properties of recycled concrete
aggregate using methods commonly applied in modern road engineering. Bulk and true density, water
absorption, compressive strength, and frost resistance were determined. The results showed that the
recycled concrete aggregate exhibits strength grades ranging from M600 to M800 and frost resistance of
F50–F100, meeting the requirements for bicycle path base layers. It was established that the increased
water absorption of the material does not have a significant negative impact on its performance under the
dry and hot climatic conditions of Tashkent. The study concludes that the use of crushed concrete waste
in bicycle path construction is feasible and contributes to reduced construction costs, lower volumes of
waste disposal, and decreased consumption of natural mineral resources.