Lightweight Concrete Cast Using Recycled Aggregates

摘要

Lightweight concrete (LWC) has been successfully used since the ancient Roman times. It has gained its popularity due to its lower density and superior thermal insulation properties. LWC can significantly reduce a dead load of structural concrete elements compared to normal weight concrete. Concrete cast using recycled aggregates considered as green concretes as their positive impact on the environment. This research conducted to study the efficiency of obtaining structural LWC cast using recycled aggregates as coarse aggregates. In this research, the main variables are; type of recycled coarse aggregates used ( crushed light brick, crushed glass, and crushed red brick compared to dolomite) , the dosage of Lightweight aggregate used ( ADDIPOR -55 as 0, 10 , 2 0 and 30 % of coarse aggregate volume ) . The investigated physical properties included the unit weight and slump values as well as the main mechanical properties of hardened concrete in terms of compressive, tensile, flexural, and bond strengths.