Cement-Free Refractory Concretes. Part 7. Concrete Mix Properties and their Grain Size Distribution

Abstract

A fundamental difference between the grain size composition of cement-free refractory concretes (CFRC) from low- and ultra-low-cement concretes is presence within their composition of up to 2 – 3 % nanoparticles (<0.1 μm) that determine increased reactivity. During selection of the optimum CFRC grain size composition in order to achieve the densest particle packing there is often use of “ideal curves” in accordance with Andreasen and Furnas equations. The specific nature of the use of porous fillers in the production of CFRC is considered. The strength of ceramic concrete with porous aggregates significantly exceeds the strength of the aggregates themselves.