Waste From The Coal Extraction Process As
Raw Material For The Construction Industry
Author(s)
N. Quaranta, M. Caligaris, H. López, M. Unsen, M. Carrasco,
R. Grether, M. Suarez & L. Beltramini
Abstract
During mineral mining, huge quantities of waste are produced. This waste is
usually placed in the open air, near the deposits, with the environmental
consequences this situation implies.
The construction industry and its auxiliaries can receive waste and
by-products. As these industries handle materials on a large scale they can
include an important percentage of waste in their compositions.
In the present work the feasibility of utilization by the construction industry
of waste originating during the coal extraction process as a raw material was
studied.
The materials, as received from the mine, were characterized as usual. From
analysis of the results it is concluded that the waste can be used without any
additives, but subject to a previous milling process in order to reduce the bigger
pieces so as to prepare adequate mixtures for the compacting process.
In a previous work some waste from the process was analyzed: ashes, mud
and sterile material. As the stored quantity of the sterile material is noticeably
higher and its characterization shows the possibility of using it to produce dense
bodies, only this residue is studied in this work.
The \“steriles” were ground and mixtures with different particle size
distribution were prepared. These powders, with 12% H2O and without other
additives, were uniaxially pressed in order to obtain samples that were heat
treated at 850°C.
The samples obtained had good properties related to color, edges and surface
finish. They were characterized by several techniques.
Keywords: waste, coal extraction, construction, recycling, ceramic bricks.
Keywords
waste, coal extraction, construction, recycling, ceramic bricks.
Related Book
Other papers in this volume
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