Evaluation of RCCP performance related parameters using recycled concrete aggregate as a sustainable approach

Abstract

The abundant production of construction and demolition waste is posing a great threat to the environment. Recycling this waste will reduce the pressure on virgin aggregates and the environment. Recycling also reduces the pressure on the landfills and helps the economy of the country. Thus, the use of recycled aggregates has been globally recognized as a sustainable approach in many construction projects. Roller compacted concrete offers a cheaper and easier solutions in many civil projects. As far as the knowledge of the author is concerned, there are very few studies carried out to study the use of RCA in RCC. In addition, such works are very limited in developing countries like India and Bhutan. This research evaluates the use of recycled concrete aggregates in roller compacted concrete. Three different series of mixtures were produced with different cement content (14%, 15% and 16%). In each series, the natural aggregates were replaced with recycled concrete aggregates at two levels, 50% and 100%. In total, nine different mixes were produced, their mechanical properties and durability properties evaluated. The results obtained from laboratory works indicate that the RCA can be used in RCC mixes at 50% replacement levels.