RU2012122575A

RU2012122575A - THERMAL INSULATION AND CONSTRUCTION POLYSTYREN CONCRETE

Info

Publication number: RU2012122575A
Application number: RU2012122575/03A
Authority: RU
Inventors: Виктор Алексеевич Рахманов; Владислав Иванович Мелихов; Анатолий Иванович Козловский; Алексей Владимирович Юнкевич
Priority date: 2012-06-01
Filing date: 2012-06-01
Publication date: 2013-12-10
Also published as: RU2515664C2

Abstract

1. Теплоизоляционно-конструкционный полистиролбетон, состоящий из портландцемента, полистирола вспененного гранулированного (ПВГ), получаемого многократным вспениванием, воды, воздухововлекающей (порообразующей) и модифицирующей добавок, отличающийся тем, что повышенные прочностные и теплоизоляционные свойства материала обеспечиваются использованием ПВГ с объемным содержанием (концентрацией) в полистиролбетоне - φ в пределах 0,40-0,60, полученного из исходного полистирольного бисера крупностью 0,7-1,0 мм, и характеризующегося комплексным безразмерным показателем качества ПВГ - n в пределах 1,5-1,75, значения которого определяются при проектировании состава полистиролбетона по формулегде Kи К- безразмерные коэффициенты, отражающие влияние технологических параметров получения ПВГ, значения которых находятся соответственно в пределах 1,1-1,3 и 8,0-10,8; d- средний размер (диаметр) исходного (перед 1-м вспениванием) полистирольного бисера, мм; d- средневзвешенный размер (диаметр) гранул ПВГ, мм;и ρ- насыпная и средняя плотности гранул ПВГ, кг/м.2. Теплоизоляционно-конструкционный полистиролбетон по п.1, отличающийся тем, что используют комплексную воздухововлекающую и модифицирующую добавку многофункционального действия, представляющую собой однородную гармонично сбалансированную смесь в сухом или жидком виде, состоящую из воздухововлекающей добавки на основе продуктов окисления отходов пищевой промышленности и пластификатора поликарбоксилатного типа или сульфированного продукта поликонденсации меламина с формальдегидом с числом звеньев в молекулярной цепи 18-27 при массовом соотношении компонентов (воздухововлекаю1. Heat-insulating and structural polystyrene concrete, consisting of Portland cement, granular foamed polystyrene (PVG) obtained by repeated foaming, water, air entrainment (pore-forming) and modifying additives, characterized in that the increased strength and heat-insulating properties of the material are ensured by the use of PVG with a volume content (concentration ) in polystyrene concrete - φ within 0.40-0.60, obtained from the initial polystyrene beads with a particle size of 0.7-1.0 mm, and characterized by a complex dimensionless PVG quality indicator - n in the range of 1.5-1.75, the values of which are determined when designing the composition of polystyrene concrete according to the formula K and K are dimensionless coefficients reflecting the influence of technological parameters for producing PVG, the values of which are respectively in the range 1.1-1, 3 and 8.0-10.8; d is the average size (diameter) of the initial (before the 1st foaming) polystyrene beads, mm; d is the weighted average size (diameter) of the PVG granules, mm; and ρ is the bulk and average density of the PVG granules, kg / m. 2. The heat-insulating and structural polystyrene concrete according to claim 1, characterized in that a complex air-entraining and modifying additive of multifunctional action is used, which is a uniform harmoniously balanced mixture in dry or liquid form, consisting of an air-entraining additive based on oxidation products of the food industry and a polycarboxylate plasticizer or sulfonated polycondensation product of melamine with formaldehyde with a number of units in the molecular chain of 18-27 with mass the ratio of components (air

Claims

1. Heat-insulating and structural polystyrene concrete, consisting of Portland cement, granular foamed polystyrene (PVG) obtained by repeated foaming, water, air entrainment (pore-forming) and modifying additives, characterized in that the increased strength and heat-insulating properties of the material are ensured by the use of PVG with a volume content (concentration ) in polystyrene concrete - φ within 0.40-0.60, obtained from the initial polystyrene beads with a particle size of 0.7-1.0 mm, and characterized by a complex dimensionless quality indicator of PVG - n in the range of 1.5-1.75, the values of which are determined when designing the composition of polystyrene concrete according to the formula

n = 1,5 + K_{one} \sqrt{\frac{K_{2} d_{b} ρ_{P AT G}^{N}}{d_{from R} ρ_{P AT G}}} - one,

where K ₁ and K ₂ are dimensionless coefficients reflecting the influence of technological parameters for obtaining PVG, the values of which are respectively in the range 1.1-1.3 and 8.0-10.8; d _b - the average size (diameter) of the original (before the 1st foaming) polystyrene beads, mm; d _cp — weighted average size (diameter) of PVG granules, mm;

ρ_{P AT G}^{N}

and ρ _PVG - bulk and average density of the granules of PVG, kg / m ³ .

2. The heat-insulating and structural polystyrene concrete according to claim 1, characterized in that a complex air-entraining and modifying additive of multifunctional action is used, which is a uniform harmoniously balanced mixture in dry or liquid form, consisting of an air-entraining additive based on oxidation products of the food industry and polycarboxylate plasticizer type or sulfonated polycondensation product of melamine with formaldehyde with the number of units in the molecular chain 18-27 at wt ovom component ratio (air-entraining additive: plasticizer) of 1: (0.25-0.5) and specific consumption of an integrated additive 0.06-0.15% by weight of active substance by weight of Portland cement..

3. The heat-insulating and structural polystyrene concrete according to claim 1, characterized in that the proposed calculation method allows to obtain material of reduced thermal conductivity with a given strength while reducing the complexity of the design work of the polystyrene concrete composition in the factory.