| dc.description.abstract | This research focuses on the utilization of High-Density Polyethylene (HDPE)
plastic waste as a substitute for fine aggregate in the manufacture of Cellular
Lightweight Concrete (CLC) bricks. The main objective is to analyze the effect of
using HDPE waste on the physical and mechanical properties of lightweight bricks.
The research results show that the addition of HDPE plastic waste has a significant
influence. The compressive strength of lightweight bricks decreases with increasing
HDPE content, from 1.16 MPa at 0% HDPE to 0.92 MPa at 15% HDPE. The
highest oven-dry density was obtained in the 0% HDPE variation with 830,883
kg/m³, but decreased at higher HDPE contents. Water absorption increases from
15,43% at 0% HDPE to 23,29% at 15% HDPE, while porosity increases from
12,79% at 0% HDPE to 17,57% at 15% HDPE. Microstructural analysis reveals
the dominance of oxygen and calcium in the chemical composition of HDPE, which
can potentially affect the material properties. The impact resistance test shows
optimal performance in the 5% and 15% HDPE variations, while the fire resistance
test indicates a more even heat distribution at higher HDPE contents. Economic
analysis shows an increase in production costs with the increase in HDPE
percentage, from Rp10,000 per unit (0% HDPE) to Rp27,739 per unit (15%
HDPE). Overall, this study concludes that the utilization of HDPE waste as a
substitute for fine aggregate in CLC lightweight bricks has a significant impact on
the properties of the bricks, with the potential for cost savings and increased
sustainability, but requires careful consideration of the optimal composition. | en_US |
