Performance of Autoclaved Aerated Concrete (AAC) Containing Recycled Ceramic and Gypsum Waste for Partition Walls Application

The normal growth population and development in big cities have caused many problems such as municipal solid waste (MSW) and noise pollution. To solve these problems, two type of eco-friendly autoclaved aerated concrete (AAC) containing recycled ceramic and gypsum waste (CGW) with different ratio (0, 5%, 10%, 15%, 20%, 25% and 30% wt) have been prepared according to American Society for Testing Materials (ASTM) C1693-09. Type one (I) is AAC containing recycled CGW as a partial replacement for sand. Type two (II) is AAC containing recycled CGW as additional material. The compressive strength of samples has been tested according to ASTM D695 by using Universal Testing Machine (UTM). The sound absorption coefficient (SAC) has been carried out by using Impedance Tube Model No: AED1000 according to ASTM E1050 at low frequency 75Hz to 500Hz. All samples showed free crack and normal colour behaviour such as grey. The compressive strength of AAC samples in the range of 6.10% to 29.88% for AAC Type I and in range of 29.27% to 45.73% for AAC type II. The maximum compressive strength was 2.13 MPa and 2.39 MPa for AAC type I and II at 15% wt and 5%wt of CGW, respectively. The maximum sound absorption coefficient was around 0.75 to 0.768 for AAC type I at frequency 500Hz. Generally, AAC type I has higher SAC compared to AAC type II and was categorized as class B absorbers at frequency 500Hz. Our results showed that CGW has succeeded in improving the performance of AAC such as work density, compressive strength and SAC. Especially for AAC type I, the samples are suitable for wall application such as partition walls, party walls and sound insulation material.