37º IAHS World Congress on Housing: - Universidad de Cantabria

XXXVII <strong>IAHS</strong><strong>World</strong> <strong>Congress</strong> on HousingOctober 26 – 29, 2010, Santander, SpainCODE: 133EFFECTIVE UTILIZATION OF THE INDUSTRIAL WASTESIN CONCRETE PRODUCTIONJ. Junák i , N. Števulová ii Department of Material and Environmental Engineeringi Technical University of Košice, Civil Engineering Facultyi e-mail: Jozef.Junak@tuke.skKey words: coal fly ash, slag, treatment, concrete, compressive strengthAbstractBuilding industry gives very important and wide-ranging possibilities of industrial wastesutilization for producing some building materials and products. In this branch the wastes formenergetic and metallurgical processes are the most used.In this paper overview of fly ash and slag treatment in building industry, with accent on itsutilization as the partial replacement of cement and natural aggregate in concrete, is presented.The experimental part of paper is divided into two parts. In the first part the experimentalresults of cement replacement by coal fly ash in the mixture are presented. The second partsummarizes research results of selected natural aggregate replacement by slag in the concreteproduction.From evaluation of the experimental results follows, that this information can be used inpreparing the standards and landfill waste material utilization in concrete production withstrength classes C 20/25 and C 25/30. The application of both waste material types as thepartial replacement of cement and natural aggregate in concrete would result in wastemanagement transformation of heating and power plants into non-waste technologies.37º <strong>IAHS</strong> <strong>World</strong> <strong>Congress</strong> On Housing Science 80