Lopezite Enhanced Engineering Cementitious Sludge Ash Composite Using Emma Technique

According to the UN sustainable development goals, reducing and use of sludge is essential to maintain the sustainability by reproducing sludge into an industrial application product. Various types of sludge are produced from different sources from residential and industrial outlets. Sewage sludge is produced in large quantities where it is essential to be treated and to be reproduced into an applicative product. One such industrial product is the building component brick and composites made from sludge waste. The texture, porosity and compressive strength are important for such kind of sludge composite for building materials. Many studies have taken place to improve those parameters but by adding mineral admixtures into sludge components are very case in testing and proving. The objective of this study is to add a natural mineral component Lopezite to the sludge particle and to reduce the number of samples needed for trial mixes to reduce material quantity using Elkem Material Mix Analyzer (EMMA) which optimizes from nine samples to six samples with water content from 0.24 to 0.14. The EMMA is a particle packing technique which uses Modified Anderson and Andreason (MAA) theory and High range water reducing admixture (HRWRA) at water ratio of 0.16 with ideal dose. At the 28th day curing, the sample mix A08 recipe gave a compressive strength of 79 MPa for 70.6 mm x 70.6 mm x 70.6 mm cube of Lopezite added composite than the normal sludge composite of 42 MPa. Hence, this study proves that the Lopezite added sludge ash composite with EMMA technique gave good results and optimizes material quantity.