MA34-1 Building Tomorrow’s Society Bâtir la Société de Demain Fredericton, Canada June 13 – June 16, 2018/ Juin 13 – Juin 16, 2018 THE USE OF GRANITE SLURRY IN MASONRY MANUFACTURING Attia, Nada 1,4 , Moustafa, Omar 1 ,Abdeldayem, Mohamed 1 ,Yanni, Rafik 1 , Elsobky, Basma 1 , Elweleily, Omar 1 , Darwish, Mohamed 2 , Rashwan, Mohamed 2 , Abouzeid, Mohamed 3 and Fahmy, Ezzat 3 1 Student, American University in Cairo, Egypt 2 Adjunct Faculty, American University in Cairo, Egypt 3 Professor, American University in Cairo, Egypt 4 Corresponding Author: nadatarattia@aucegypt.edu Abstract: The waste powder produced during granite manufacturing has been a source of significant pollution and health hazards. The use of this waste powder in concrete has been studied by several researchers. The current study involves partial replacement of the fine aggregates by five different proportions of granite waste powder in the mix of the concrete used for producing concrete bricks. Wet and dry tests on concrete bricks are performed. The effect of varying the percentage of granite waste powder on the various properties of the produced masonry are assessed and compared to a control group with no powder involved. The mixtures having the highest strengths are determined and used to construct masonry prisms subjected to compression. The mix used to construct the prism surviving the highest compression is considered as the one adequate for future masonry production. The initial results indicate that incorporating such waste in masonry walls can be one promising venue for its utilization in the construction industry. Keywords: Granite Waste; Cement bricks; Granite Slurry; Masonry 1 INTRODUCTION Egypt has got huge stores of amazing granite and stone. World Stone generation achieved the pinnacle of somewhere in the range of 75 million tons (or 820 million m 2 proportionate), net of quarry waste (El- Sayed, 2016). The official generation figures of Egypt are striking; yet, the genuine creation is extensively higher than the level demonstrated by the official insights and possibly past the levels assessed over the span of the examination featured. The estimations in light of the data recovered through neighborhood appraisal credited to Egypt: a quarry generation of around 3.2 million tons and more than 25 unique sorts of Egyptian stone (El-Sayed, 2016). This shows the nation lies among the main 8 world makers of crude material. The normal yearly rate of increment has achieved 8.8% since 2002(Allam, 2014). Concerning quarry creation and crude fare, Egypt is positioned the fourth separately with an offer of 4.3% and 6.6% of aggregate world market of Granite and rock. This implies Egypt can be viewed as the seventh exporter on the planet, as far as volume, after China, India, Italy, Spain, Turkey and Brazil. During the process of granite manufacturing, a massive amount of water is used while cutting the granite piles with diamond blades to cool off the process. The result is water absorbing dust and granite slurry powder without any proper way to recycle it or getting rid of it. If the water is disposed on the ground, the slurry powder dries, and it causes air pollution. The main issue that water use in the granite manufacturing process is essential to cool down the blades.