Viability Of Recycled Pavement Concrete As Fine Aggregate In New Concrete Construction

     In developing countries like the Philippines, huge construction materials are required due to continued infrastructural growth and huge quantities of construction and demolition wastes are generated every year. Therefore, there are problems relating to disposal of demolished pavement concrete because the number of sanitary landfills and its capacity is limited. A practical way to reduce the volume of demolished pavement concrete disposal is to recycle them through concrete manufacture. This study with the intent of extending the recycling of demolished pavement concrete by determining its viability in concrete production, presents results regarding the effect of recycling sand with fine demolished pavement concrete on the compressive strength and workability of concrete. The demolished pavement concrete replaced sand at 15%, 30% and 45% by total fine aggregates volume in concrete. Results of the experiment show that increasing the RCA content up to 45% showed an increase in compressive strength with respect to the reference concrete. With this, in terms of compressive strength, replacing sand with RCA by up to 45% of the total volume of fine aggregates can be a viable option for concrete production.