| dc.description.abstract | Among the main materials of civil construction or prominence, mainly for the
manufacture of precast. In the United States and Europe there are more than five
hundred applications for accessories, while in Brazil these different applications are
around thirty-five. It became evident, therefore, the need to develop more applications
for those who continue to exhibit as one of the development resources of the Northeast
Region of Brazil; called by some aficionados of the plaster chain “Ouro Branco”. These
new applications of gypsum involved or reuse of industrial waste, as a way of rational
use of coal ash reserves, coal ash for compost production can make the plastering
activity more sustainable. As ashes are solid residues from coal-based mineral fuel,
being one of the main environmental liabilities in Thermoelectric Plants (UTE's) that
use mineral coal as the energy matrix. A coal mineral is a well-known and abundant
by-product, but without an efficient application yet defined. However, it can be applied
to industrial processes that allow the development of building materials, provided that
this application allows the use of its safe form, making it extremely important to reuse
it, up to the point of designated sustainable use. In this research, the gray coal mineral
was mixed to cause a compound with fireproof properties. The proposed compound
comprises a material for making partition blocks with fire protection properties, security
for safety in certain living areas or houses equipment that involves or handling material
materials (high voltage transformers and circuit breakers room in the sub-limits of high
voltage performance). Test specimens of this compound were made and used
conditions conducive to the propagation of flames. However, to guarantee a quantity
of water present in the sample, a technique was applied to the massive and commercial
scale partition blocks. As temperatures on the surface of the blocks, contact a LPG
flame (605 4 ° C) and in different positions inside them, were monitored. A polynomial
regression model indicates a percentage reduction in temperature of around 23%, for
120 minutes, for a block surface made with a content of coal ash of 40%. This reduction
on the face opposite the surface in contact with a flame, confirming the detection of fire
break blocks, signals the possibility of safety and more sustainable changes. | eng |
