Szukana fraza: [Abstract = The article is the first part of a series concerned with the modelling of reactive powder concrete by using a numerical homogenization technique. This technique is a multi\-scale modelling approach. Specifically, in this paper a two scale modelling concept was applied. A model of reactive powder concrete \(RPC\) is considered whose behaviour on the macro scale is described on the basis of the phenomena occurring in the microstructure of the material.]