“A Concrete Hollow Block Utilizing Corn Husk Ash (CHA) And High-Density Polyethylene (HDPE) Bottles as Partial Replacement for Cement And Fine Aggregates”

The study investigates the use of waste high-density polyethylene (HDPE) and corn husk ash (CHA) as partial substitutes for cement and fine aggregates in the manufacturing of concrete hollow blocks (CHB). Through laboratory experiments and analysis, it was found that these sustainable alternatives exhibit promising results, with notable improvements in compressive strength, water absorption, and dry density. The combination containing 5% HDPE and 5% CHA replacement, known as mixture 2, had the highest compressive strength after 28 days, measuring 7.33 MPa. The controlled mixture followed in second at 6.78 MPa. In the slump tests. there were no slumps at all for any of the trial mixes, suggesting constant workability. After 28 days, Mixture 3 with 5% HDPE and 10% CHA replacement had the maximum water absorption performance, with a rate of 5.12%, also exhibiting, during seven days of curing, the maximum dry density of 2161 kg/m3. To enhance sustainability, reduce the impact on the environment, and perhaps minimize production costs, the study suggests utilizing CHA and HDPE in the creation of CHB. The suggested concrete mixtures offer a workable solution by ensuring compliance to industry requirements and optimizing the replacement percentages. This research gives significant insights into the feasibility and benefits of incorporating waste materials into the manufacture of concrete through a through evaluation of mechanical qualities and cost- effectiveness, opening the door for more environmentally friendly and effective construction techniques.