Experimental investigation on performance of composite acoustic cement panel using recycled SMB waste

Recycling of E-waste is most viable and sustainable solution for handling environmental pollution which is a major requirement. Surface mounted boards (SMB) comprises of various materials such as Metals and Nonmetals. These boards are considered for E-waste study and this waste after crushing and sieving is used as a partial replacement of sand in cement and fly ash brick manufacturing. In which, sieved surface mounted boards waste in different percentages ranging from 0% ,5%,10%,20% & 25% is used as replacement of sand. Along with these, 3% polypropylene is also used to enhance the compressive strength by maintaining mixture ratio of 1:3 (cement: sand). Compressive strength after 28 days is measured and noticed that addition of 3% polypropylene resulted in increase of compressive strength in the compositions of 0% & 5% SMB sieve but in later compositions its effect is not much seen. Sound absorption coefficient is measured for these samples using two microphone impedance tube test-setup with plane wave excitation as per ISO 10534:2 to determine acoustics properties.