HEAT-INSULATING CONSTRUCTIVE POLYSTYRENE CONCRETE Russian patent published in 2014 - IPC C04B38/08 

FIELD: chemistry.

SUBSTANCE: invention relates to construction materials, in particular to polystyrene concretes, used in heat-preserving protective structures of buildings and constructions. Heat-insulating constructive polystyrene concrete with density 225-350 kg/m³, is obtained from mixture, which contains Portland cement, water, complex air-involving and plasticising additive of multifunctional action, which represents balanced mixture in dry or liquid form, consisting of air-involving additive PO-01B based on products of oxidation of food industry wastes and plasticiser of polycarboxilate type or sulfonated product of polycondensation of melamine with formaldehyde with number of links in molecular chain equal 18-27 with weigh ratio: air-involving additive:plasticiser, equal 1:(0.25-0.5), and specific consumption of said complex additive 0.06-0.15 wt % of Portland cement weight, polystyrene foamed granulated (PFG) with volume content in polystyrene concrete - φ in the range 0.40-0.60, obtained after triple foaming of initial polystyrene beads with coarseness 0.7-1.0 mm and characterised by complex dimensionless index of PFG quality - n in the range 1.5-1.75, whose values are determined in the process of designing polystyrene concrete composition by formula: where K₁ and K₂ are coefficients, reflecting peculiarities of technology of PFG obtaining, values of which are respectively in the range1.1-1.3 and 8.0-10.8; d_b is the average diameter of initial polystyrene beads, mm; d_av is average weighted diameter of PFG granules, mm; $${\rho }_{PFG}^b$$ and ρ_PFG are bulk and average densities of PFG granules, kg/m³.

EFFECT: creation of heat-insulating constructive polystyrene concrete with density 225-350 kg/m³ with optimal properties: increased strength and heat-insulating properties.

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