Análise de blocos intertravados de concreto para pavimentos com o uso de cinzas pesadas de termelétrica

Abstract

At the Pecém Thermoelectric Plant (PTP), in the state of Ceará, there is a considerable bottom ashes production, which do not receive an adequate destination. With the advancement of the use of Interlocking Pavements (IPs) in Ceará, the use of these ashes in the concrete used in the Interlocking Pavement Blocks (IPBs) manufacture is a proper destination possibility for them. This article objectives are to present an analysis of the IPBs manufacturing with thermoelectric bottom ash and to evaluate design methodologies for IP. Characterization tests were carried out on conventional and alternative materials, in addition to mechanical tests on IPBs. The IP sections resulting from empirical and mechanistic-empirical design methods were compared. It was concluded that IPBs with 20%

bottom ash (fine portion) provided the highest compressive strength values. It was also found that the mechanistic- empirical design was advantageous, from a financial point of view, in the IP construction.