Experimental Study on the Mechanical Properties of Aerated Concrete Blocks Incorporating Waste Aluminium Foil Powder

The disposal of Aluminium foil waste presents notable environmental issues due to its non-biodegradable nature. Recycling Aluminium foil is often inefficient and economically unfeasible, particularly when it is contaminated with food residues or other materials. If it enters natural environments, wildlife may ingest it accidentally, which results in severe internal injuries or fatalities. Furthermore, incinerating Aluminium waste releases harmful pollutants into the atmosphere, contributing to air quality degradation. This study focuses on evaluating the mechanical properties of aerated concrete blocks produced using waste Aluminium foil powder. In the experimental phase, Aluminium Powder (AP) was introduced as a partial substitute of cement at the range 2.5-5.5% by weight. An admixture ADMIX CF 107 was incorporated into the mix. 16 aerated concrete cube specimens were prepared and tested for compressive strength. For each mix, two cubes were tested at both 7 and 28 days to assess strength development over time. The average 7-day compressive strengths for AP were 20.0 MPa, 23.86 MPa, 16.91 MPa, and 10.5 MPa, respectively. Corresponding 28-day average compressive strengths were 22 MPa, 26.75 MPa, 21.19 MPa, and 13 MPa. The mix containing 3.5% AP provided the highest compressive strength, indicating the most effective replacement level among those tested.