Incorporation of siliceous sand and lignite tailings from Miocene deposits (Zeramdine, Eastern Tunisia) in clay bricks and ceramic tiles: technological feasibility.

Autor: Imen, Maalla, Slim, Boussen, Nathalie, Fagel, Gaied, Mohamed Essghaier
Zdroj: Arabian Journal of Geosciences; Feb2021, Vol. 14 Issue 4, p1-22, 22p
Abstrakt: The Miocene green clay from Zeramdine areas, of various physico-chemical, colour, and firing properties, have been widely used as raw materials in the fabrication of diverse building ceramic products. However, these clay resources are rapidly consumed which in turn affects the local industrial productivity. Up to now, only green clays are extracted and used in the ceramic industry the lignite and siliceous sand from the Miocene deposits being considered as waste; this research aims to present a new alternative for quarry wastes in the red clay ceramic industry. With the objective of reducing the amount of the clay used in ceramic industries in order to preserve the clay resources from the Zeramdine district and to minimize the negative impacts on environment, different mixings of clay, lignite, and siliceous sand were tested. The mixture M2 made by 87% of clays, 10% of siliceous sand, and 3% of lignite gave the best geotechnical properties (i.e. firing temperature at 1150 °C firing shrinkage 3.28% weight loss 10.07%, water absorption: 5.94%, and bulk density: 1.99gcm−3 flexural strength 34.57 MPa. The other physical properties fit with the Tunisian NT 21-287 (2004) and European EN 777-1 (2003) Standards. Their technological properties are especially consistent with the production of rustic tiles, red stoneware, and fast-fired red wall tiles. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index