Utilization of Water Treatment Plant Sludge With High Calcium Fly Ash As Geopolymer Precursor For Paving Cement-Free Bricks. JIAEM [Internet]. 2024 Apr. 25 [cited 2026 May 14];44(1):15-30. Available from: https://or.niscpr.res.in/index.php/JIAEM/article/view/7086