ABSTRACT
INTRODUCTION Concrete technology is the art of compromises or, in another way, the science of optimization. The product consists of a few ingredients which are mixed in various combinations, transpor ted and placed by different methods, compacted and cured. Theo retically, one knows how to design a concrete mix in order to adjust the properties to specific needs, technical and economi cal ones. This is true for plain concrete, but it is not yet true for fibre reinforced concrete.
