What lightweight concrete mixes are viable for portable outdoor trash cans?

Creating portable outdoor trash cans from concrete requires mixes that balance low weight with durability. Lightweight concrete, incorporating materials like perlite, vermiculite, or expanded clay aggregates, is viable for this purpose. A standard mix ratio could be 1 part cement, 2 parts sand, and 2 parts perlite by volume, with a water-reducing admixture to maintain workability and strength while minimizing weight. For enhanced portability, the concrete should be cast into thin-walled sections, potentially reinforced with fiber mesh to prevent cracking. The surface must be sealed with a concrete sealer to withstand outdoor elements like rain and UV exposure, ensuring the trash can remains functional and mobile without sacrificing structural integrity. This approach allows for the creation of sturdy, yet easily movable, outdoor containers.