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In recent years, the natural extraction of clay has not been easy. Due to this dilemma, the cost of clay has been greatly increased. In order to reduce the purchase cost of natural clay, the final waste disposal problem can be exploited for the development of waste material that can replace natural clay.
The main purpose of this study is to develop four kinds of waste, such as "sapphire substrate cutting sludge", "oyster shell", "quartz brick polished powder" and "silicon mud"as alternative natural clay raw material. These materials were tested as production material for their feasibility as red brick raw materials. In this study, the above four wastes were added to the red brick in different proportions to carry out red brick production tests in terms of water absorption and compressive strength. Subsequently, these parameters were used to assess whether the red brick products were in line with Taiwan’s Ministry of Economic Affairs level 3 brick specifications.
According to the results of this study, it is shown that the best brick-making conditions can be achieved by mixing the quartz brick polishing powder with the sapphire substrate cutting sludge and then adding it to the natural clay. Natural clay (70%) mixed with utting sludge (15%) and polishing powder (15%) is the best blending condition. This red brick material exhibited a compressive strength of 258.9kgf/cm2 and water content of 14.6%. That is, the production of the red brick was in line with Taiwan’s Ministry of Economic Affairs level 3 brick specifications(CNS382). Additionally, after the TCLP test, it was confirmed that this product does not have hazardous characteristics.
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