TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Properties: The cementitious product has thickness of 3-50 mm. The aggregates comprise fines such as fillers which is fraction of fines having maximum diameter of 40 microns, powders and sands defined based on UNI EN 206 Standard, and non-fines having maximum diameter of more than 40 microns. The content of filler is 15-60% with respect to content of aggregates. Aggregates comprise fractions such as silico-calcareous alluvial aggregates having diameter of 0.20-0.35 mm, silico-calcareous alluvial aggregates having diameter of 0.60-0.80 mm, silico-calcareous alluvial aggregates having diameter of 1-1.50 mm, filler-type calcareous aggregates having diameter of 0.1-40 mu m, powder-type calcareous aggregates having diameter of 0.1-0.8 mm, fine marble granules having diameter of 0.1- 100 mu m, and dust-free marble granules having diameter of 0.10-0.60 mm.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition: The content of hydraulic binder in the composition is 60% or less with respect to content of aggregates. The anti-shrinkage agent is chosen from glycols, diols and/or polyols, or glycolic ethers and/or their derivatives, preferably Espandex 2000 (RTM: anti-shrinkage agent). The superplasticizer agent is chosen form polycarboxylic polymers in the solid phase or as an aqueous solution, preferably Cimfluid Adagio (RTM: superplasticizer agent in solid form) or Driver 72 (RTM: superplasticizer agent in liquid form). The fluid composition further comprises a water-repellent agent chosen from Ligaphob N90 (RTM: sodium oleate), organosilicon substances, or Seal 200 (RTM: alkyloxysilane), and anti-foaming agent. The hydraulic binder is photocatalytic cement.    TECHNOLOGY FOCUS - POLYMERS - Preferred Process: Cementitious product is manufactured by casting in mold having vertical walls at least partly coated with a material chosen from polyethylene terephthalate, polycarbonate, polyamide and polymethyl methacrylate.