PROCESS FOR OBTAINING HEAT-INSULATING CONCRETE BASED ON HEAVY ASH OF POWER PLANT

Authors: POPESCU GEORGETA LUMINIȚA, MARICA MĂDĂLINA MIRABELA, ABAGIU TRAIAN ALEXANDRU, PREDEANU GEORGETA, RACOCEANU CRISTINEL, CRUCERU MIHAI, POPESCU CRISTINEL, DIACONU BOGDAN MARIAN, CIOFU FLORIN CRISTIAN, CAZALBAȘU RAMONA, ANGHELESCU LUCICA

Company/Institution: University ,,Constantin Brâncuși" of Târgu Jiu

Country: Romania

e-mail: ctt.ucb@gmail.com

web: https://www.utgjiu.ro

The invention refers to a process for the manufacture of heat-insulating concrete, with the use of hearth ash resulting from the burning of coal in thermoelectric power plants as a light granular aggregate. It is known that for the manufacture of heat-insulating concrete with maximum usage temperatures of up to (1000-1100)ºC, light aggregates are currently used, such as calcined diatomite and granulated blast furnace slag, raw materials that are currently in short supply in Romania. The technical problem that the invention solves consists in obtaining concrete with thermal power plant ash, through a cheap, economical and easy to apply process in production. The process of obtaining heat-insulating concretes, based on thermal power plant fly ash and cement, assumes that in the composition of these concretes, ash represents (25-80)%, either as a single granular aggregate or in combination with other types of heat-resistant, lightweight granular aggregates, usual, such as, for example, expanded perlite. Heat-insulating concretes based on thermal power plant ash, obtained according to the invention patent, can be put into operation by known technical processes, of casting-vibration or shotcrete.