Parameter optimisation for producing fired bricks using organic solid wastes (original) (raw)
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Materials
The European Green Deal, which emphasizes zero-waste economies, and waste recycling in construction and building materials, has arisen due to significant worldwide needs for solid waste recovery and usage. This ambitious study focuses on recycling mixed construction and demolition (C&D) waste into burnt bricks and investigating the influence of firing temperature. While pursuing its objectives, this is dependent on raw material characterization and burnt-brick product quality assessment. The recycling of mixed C&D waste is explored by mixing the waste into two soil types (alluvial and laterite) in ratios ranging from 5% to 45% at three firing temperatures (700 °C, 850 °C and 900 °C). The utilization of mixed C&D waste in amounts of 10% at 700 °C and 25% at 850 °C and 900 °C fulfilled the Indian standard. Although a fire at 700 °C results in less optimal waste utilization, it is beneficial and recommended for reducing the carbon footprint and energy use. Additional mineralogical and ...
Utilization of mixed waste in fired brick manufacturing
Recycling wastes are a practical solution to reduce its detrimental effects. Many problems have arisen recently due to the rapid expansion on the quantity of waste. In this work, a practical solution was presented. The waste was mixed with wet clay to form a mixture that molded under pressure to form a wet brick. The wet bricks were entered into big ovens and during the firing process, porosity was induced inside them. The induced porosity enhanced the thermal insulation, decreasing the density, producing good brick durability with acceptable mechanical properties of the fired brick, in addition to that, a preservation in natural resources could be achieved. Following ASTM standards the values of the specific heat, dry density, thermal conductivity, cold and boiling absorption coefficient and both wet and dry compressive strength were measured with good accuracy.
Assessing the suitability of selected wastes as additives to clay bodies in brick manufacture
Abstract : The article describes the assessment and optimization of a clay from a new quarry owned by an Egyptian company as a raw material for the manufacture of clay bricks. Various tests were conducted on representative samples of the raw clay to determine its particle size distribution, chemical composition, plasticity as well as its drying and firing behavior. In addition, the effect of some additives (sand, reject fired bricks, that is grog, and sawdust) on the plasticity, drying and firing behavior of the clay bodies was investigated.