Method for the production of granulate materials designed to be used for manufacturing articles in slab or block form from a mixture. The method comprises the steps of a) melting a mixture of selected minerals having a specific chemical composition for obtaining a casting of molten material, c) cooling the cast material until a predetermined temperature is reached and d) crushing and/or grinding the material to obtain granules having a selected grain size and suitable for use respectively as aggregates or fillers in the mixture for manufacture of the articles. Moreover, the method comprises, downstream of the melting and casting step a), a step b) of keeping the molten and cooled material at a temperature of between 1030-1170° C. for a predetermined time period of at least 15 minutes. The granulate materials thus obtained have a content of silicon dioxide in crystalline form of less than 1%. The invention also relates to a plant for the production of granulate materials suitable for use as aggregates or fillers for the manufacture of articles in slab or block form.

A concrete slab on ground system includes a first slab portion and a second slab portion. The first slab portion is disposed on a ground substrate and includes geopolymer cement (GC) concrete. The second slab portion is disposed on the first slab portion and consists of Portland cement (PC) concrete. The first slab portion may be mixed in-situ and left in an unfinished state such that only the top or exposed surface of the second slab portion need be finished.

A concrete slab on ground system includes a first slab portion and a second slab portion. The first slab portion is disposed on a ground substrate and includes geopolymer cement (GC) concrete. The second slab portion is disposed on the first slab portion and consists of Portland cement (PC) concrete. The first slab portion may be mixed in-situ and left in an unfinished state such that only the top or exposed surface of the second slab portion need be finished.

A method of fabricating a concrete slab on ground system includes depositing wet geopolymer cement concrete on a ground substrate to generate a first slab. Wet Portland cement concrete is then deposited on the first slab to generate a second slab.

A method of fabricating a concrete slab on ground system includes depositing wet geopolymer cement concrete on a ground substrate to generate a first slab. Wet Portland cement concrete is then deposited on the first slab to generate a second slab.