Method of producing heat insulating material

FIELD: chemistry.

SUBSTANCE: invention relates to construction, particularly to a method of producing heat insulating material based on wood processing wastes. The method of producing heat insulating material involves mixing solution-pretreated wood aggregate, portland cement, an additive and water, followed by moulding and hardening. The wood aggregate used is industrial chips. The solution used to treat the aggregate is 30% sodium glass solution in amount of 10% of the weight of the wood aggregate. The portland cement used is based on portland cement clinker with ultimate strength of 40 MPa, which is premixed with the additive which is in form of powdered calcium chloride with weight content of calcium chloride of at least 90% and in amount of 2% of the weight of portland cement. After mixing said components with water, the mixture is further mixed with process foam from an aqueous solution of 1% protein hydrolysate, with the following ratio of components, wt %: industrial chips - 38-40, said sodium glass solution - 3.8-4.0, portland cement - 39-42, calcium chloride - 0.3-0.36, said process foam - 0.8-0.85, water - the balance. The material is moulded in a press mould at pressure of 0.1÷0.35 MPa, followed by hardening at temperature of 50÷60°C and relative air humidity of 70÷80%. After hardening, a cladding is deposited, the cladding consisting of a polyol and a polyisocyanate, with the following ratio of components, wt %: polyol - 55, polyisocyanate - 45.

EFFECT: low density of the material and improved heat insulation properties thereof.

1 dwg, 1 tbl

 

The invention relates to the field of construction, in particular to a method for insulating material based on wood waste.

A known method of manufacturing a heat-insulating material - arbolita, by mixing the components, followed by molding and hardening of the material in which the mixing is performed with pre-soaked ground wood filler in water for 7-8 days at a ratio of wood filler and water, by mass 1:9, with subsequent partial removal of water, the resulting aggregate mixed with cement and calcium chloride, see RU patent No. 2329999, MPK7 SW 40/00, 2008.

The disadvantages of this method are the high material density and low insulating properties.

A method of producing heat-insulating material - arbolita, by mixing the components, followed by molding and hardening of the material in which the mixing is performed with a dry blend of wood filler and cement, the resulting mixture is mixed with the addition of calcium chloride in the amount of 1,5-2% by weight of cement, water and pre-prepared technical foam by injecting additives lime in the amount of 5-10% by weight aqueous solution of the foaming agent, see RU patent No. 2177926, MPK7 SW 40/00, 2002.

The disadvantages of this method are the high p is otnesti and low strength of the material.

The closest in technical essence is a method for insulating material by mixing the components, followed by molding and hardening of the material in which the mixing carry out pre-treated in a hot solution of CaCl2sawdust with Portland cement, additives and water, as a Supplement take technical soda and ground-up glass in the dry state.

The disadvantages of this method is that the insulating material obtained by a known method has a high density and insufficient insulation, and strength, in addition, the method requires complicated hardware design.

The objective of the invention is to reduce the density of the material and increase its insulating performance

The technical problem is solved in that a method for insulating material is carried out by mixing the pre-treated solution woody aggregate, Portland cement, additives and water, followed by molding and hardening, in which the wood filler take wood chips, as the solution for aggregate use 30%solution of glass sodium in the amount of 10% by weight of wood filler, as Portland take the cement based on Portland is cementnogo clinker with a tensile strength of 40 MPa, pre-mixed with the additive, which take the calcium chloride in the powdered state with a mass fraction of calcium chloride is not less than 90% and at 2% by weight of Portland cement after mixing the components with water in the mixture impose additional technical foam from an aqueous solution of hydrolysate 1%concentration, in the following ratio, wt.%:

process chips38-40
this solution glass sodium3,8-4,0
Portland39-42
calcium chloride0,3-0,36
the specified technical foam0,8-0,85
waterthe rest,

forming lead into the mold at a pressure of 0.1÷035 MPa, followed by hardening at a temperature of 50÷60°C and a relative humidity of 70÷80%, and after hardening is applied to the shell of the composition consisting of polyol and MDI in the following ratio, wt.%:

polyolpolyisocyanate45

Technical solution allows to reduce the density of the insulation material by 42% and the coefficient of thermal conductivity by 26%.

Example. A method for insulating material, see figure 1, is as follows, the components are mixed in the mixer 2, namely pre-treated with a solution of wood filler, Portland cement, additives and water, molding the material in a press form 8 and hardening of the material in a drying Cabinet 9. As wood filler take wood chips supplied from the hopper 1, as the solution for aggregate use 30%solution of glass sodium in the amount of 10% by weight of wood filler supplied from the tank 3, as Portland take the cement on the basis of Portland cement clinker with a tensile strength of 40 MPa is supplied from the hopper 4, pre-mixed with the additive, which take the calcium chloride in the powdered state with a mass fraction of calcium chloride is not less than 90% and at 2% by weight of Portland cement supplied from the tank 5, then keep mixing the components in the mixer 2 with water supplied from the tank 6, the resulting mixture was further added technical foam from the aqueous process is and the hydrolysate 1%concentration delivered from the generator 7. Forming lead into the mold 8 at pressures of 0.1-035 MPa, followed by curing in a drying Cabinet 9 at a temperature of 50-60°C and relative humidity of 70-80%, and after hardening of the material is applied to the shell of polyurethane foam, consisting of polyol and MDI, metered delivered from the casting machine 12 through the spout 11 in a specialized form 10. Then the material is transferred to a technological restraint within 24 hours.

Examples of specific performance.

The method according to examples 1-3 are carried out by the above-mentioned technologies.

Example 1. Based on the ratio of components, take the wood chips in the number 40,1, (38 wt%), which is mixed with a 30%solution of glass sodium in number 4, (3.8 wt.%), the Portland cement in the amount 44,4, (42 wt.%) and calcium chloride in an amount of 0.4 g (of 0.35 wt.%) mixed in a dry state and add to the technological wood chips. After mixing the components with water in an amount of 15.8 g (15 wt.%) the mixture was added technical foam in the form of a foamed aqueous solution of hydrolysate brand PB-2000 1%concentration in an amount of 0.9 g (0.85 wt.%).

The resulting mixture is formed into patterns by pre-and hardening are within 7 days.

After curing in the mold causing the sheath of polyurethane foam, consisting of polyol in the amount of 6 g (55 wt.%) and polii ocyanate 5, (45 wt%). Then the material is transferred to a technological restraint within 24 hours. Prepared samples are tested.

In examples 1-3, the ratio of components of insulating material and components for the shell of insulating material, as well as physico-mechanical characteristics given in the table.

The claimed method allows to obtain a heat-insulating material with lower density, high thermal insulation properties with preservation of strength properties.

As can be seen from examples of specific performance, see the table, the density of the insulating material is reduced by 42% compared with the prototype, thermal conductivity decreases by 26%, while the ultimate strength in compression is maintained on the level of a prototype.

The resulting insulating material has a lightness, resistance and effective thermal insulation performance to reduce material consumption by reducing the coefficient of thermal conductivity.

A method for insulating material by mixing the pre-treated solution woody aggregate, Portland cement, additives and water, followed by molding and hardening, characterized in that the quality of wood filler take technology is practical chips, as a solution for aggregate use 30%solution of glass sodium in the amount of 10% by weight of wood filler, as Portland take the cement on the basis of Portland cement clinker with a tensile strength of 40 MPa, pre-mixed with the additive, which take the calcium chloride in the powdered state with a mass fraction of calcium chloride is not less than 90% and at 2% by weight of Portland cement after mixing the components with water in the mixture impose additional technical foam from an aqueous solution of hydrolysate 1%concentration in the following ratio, wt.%:

process chips38-40
this solution glass sodium3,8-4,0
Portland39-42
calcium chloride0,3-0,36
the specified technical foam0,8-0,85
waterthe rest,

forming lead into the mold at a pressure of 0.1÷035 MPa, followed by hardening at a temperature of 50÷60°C and relative authorities the particular air 70÷80%, and after hardening is applied to the shell of the composition consisting of polyol and MDI in the following ratio, wt.%:
polyol55
the polyisocyanate45



 

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2 tbl, 1 dwg

FIELD: process engineering.

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7 cl, 3 tbl

FIELD: chemistry.

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11 cl, 7 tbl, 7 ex

FIELD: chemistry.

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6 tbl

FIELD: chemistry.

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4 cl, 4 ex, 4 dwg

FIELD: chemistry.

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8 tbl

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EFFECT: high acid-resistance of concrete.

8 tbl

FIELD: process engineering.

SUBSTANCE: invention relates to construction, particularly, to electromagnetic treatment of concrete mixes. Proposed method comprises loading the mix inside concrete mixer vibratory electric reactor accommodating three electrodes, mix heating, vibration and unloading. Prior to loading concrete mix inert components, water is heated in two-circuit process in electrode vessel to 80°C, heat carrier being transferred by electrically driven pump into second external circuit with cold water tank for mixing with hot flow. Then, said inert components are mixed with concrete by blades to discharge made mix directly via concrete mixer reduction gear and motor and loading branch pipe into hot water tank at 40°C. Then, electrically drive vibrators are connected.

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2 cl, 2 dwg

FIELD: construction.

SUBSTANCE: mixture according to the invention may be produced so that a) at least one quarternary organic ammonium compound and at least one water soluble organic polymer are mixed with each other in water and optionally the produced water mix is then dried, or b) at least one powdered quarternary organic ammonium compound and at least one powdered water soluble organic polymer are mixed with each other, or c) at least one liquid and/or dissolved quarternary organic ammonium compound is applied onto at least one powdered water soluble organic polymer, in particular, with the help of spraying, adsorbing, mixing, drying in a pseudofluidised layer and/or granulation.

EFFECT: elimination of fading of construction materials with preservation of their physical and mechanical properties.

17 cl, 4 ex, 2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to production of artificial coarse porous aggregates. The method of making claydite gravel involves preparing a ceramic mixture, moulding gravel, applying a 0.3-0.7 mm thick layer of volcanic ash onto the surface of moulded gravel, drying the gravel to moisture content of not more than 7%, firing and cooling.

EFFECT: high strength of adhesion of the aggregate with hardened cement paste.

2 ex

FIELD: chemistry.

SUBSTANCE: invention relates to production of claydite gravel which is used to decorate flower gardens, flower beds and as drainage in pots for houseplants. In the method of making claydite gravel, involving preparation of a clay mass, moistening said mass, moulding granules, drying said granules, firing and cooling, a layer of a water-soluble adhesive substance is applied onto the surface of the cooled granules, followed by a layer of mineral fertiliser, and then held until hardening of the layer of adhesive substance, wherein volumes of the layers are in ratio of 1:2-2:1. In the method of making claydite gravel, involving preparation of a clay mass, moistening said mass, moulding granules, drying said granules, firing and cooling, a layer of a mixture of a water-soluble adhesive substance and a mineral fertiliser, taken in volume ratio of 1:2-2:1, is applied onto the surface of the cooled granules and held until the layer of adhesive substance hardens.

EFFECT: broader functional properties: when the claydite gravel is used to decorate flower gardens, flower beds and as drainage, the gravel gradually releases mineral fertiliser into the soil, thereby improving nourishment of plants as they grow.

10 cl, 7 ex

FIELD: chemistry.

SUBSTANCE: invention relates to the industry of construction materials. The crude mixture for making coarse aggregate coating contains, wt %: portland cement 55.0-60.7; urea 0.7-1.3; casein adhesive 0.7-1.3; superplasticiser S-3 0.7-1.3; water 30.0-38.0. The crude mixture for making coarse aggregate coating can further contain a colouring additive in amount of 3-5 wt %.

EFFECT: high water resistance of the coarse aggregate coating.

2 cl, 1 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to production porous aggregates for concrete. In the method of producing porous aggregate, involving preparation of a ceramic casting mixture, immersing porous particles into the mixture, holding said particles in the mixture until formation of a layer, drying and firing, particles with size of 40-70 mm are used, said particles being obtained by grinding spent gypsum or phosphogypsum moulds for moulding porcelain and faience articles. The method involves holding particles in the mixture until formation of a 1-5 mm thick layer on the particles.

EFFECT: obtaining porous aggregate with an uneven surface which ensures strong adhesion with hardened cement paste.

2 cl, 4 ex

FIELD: chemistry.

SUBSTANCE: invention relates to the industry of construction materials. The crude mixture for making coarse porous aggregate coating contains the following, wt %: portland cement 25.0-30.0, casein adhesive 0.7-1.3, quartz sand 23.8-32.7, foaming agent PB-2000 0.5-1.0, water 40.0-45.0.

EFFECT: reduced consumption of portland cement, high strength of adhesion of the coating to the surface of the coarse aggregate.

1 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to production porous aggregates for concrete. In the method of producing porous aggregate, which involves preparation of a ceramic casting mixture, immersing porous particles into the mixture, holding said particles in the mixture for 5-60 minutes, followed by drying and firing, the particles used have size of 10-70 mm and are obtained from grinding foam glass processing wastes.

EFFECT: obtaining an aggregate having high adhesion to hardened cement paste.

FIELD: chemistry.

SUBSTANCE: invention relates to production of concrete aggregates. In the method of producing coarse aggregate for concrete, involving depositing a layer of a mineral binder-based mixture onto the surface of an aggregate, followed by hardening thereof, the aggregate used is blast-furnace slag chips and the mineral binder-based mixture is a portland cement-slag and sand mixture, which is obtained by grinding blast-furnace slag, taken in weight ratio of 1:3-1:2, with water-to-cement ratio of 0.8-1.2.

EFFECT: high adhesion of the aggregate to hardened cement paste of the concrete.

1 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to production porous aggregates for concrete. In the method of producing a porous aggregate, which involves preparation of a ceramic casting mixture, immersing aggregate particles into the mixture, drying said particles and firing, drying is carried out until achieving moisture content of 4-6%, firing is carried out at temperature of 1200-1250°C and the aggregate used is natural pearlite, wherein the mixture has the following composition, wt %: natural pearlite 25-30; clay 25-30; water 40-50.

EFFECT: obtaining light and strong porous aggregate.

2 ex

FIELD: chemistry.

SUBSTANCE: invention relates to the industry of construction materials. The crude mixture for making coarse aggregate coating contains the following, wt %: portland cement 30.0-34.0; urea 0.1-0.2; casein adhesive 2.0-2.6; superplasticiser S-3 1.0-1.4; quartz sand ground until complete passage through sieve 014 27.9-28.8; water 34.0-38.0. In another version, the crude mixture for making coarse aggregate coating contains the following, wt %: portland cement 30.0-34.0; urea 0.1-0.2; casein adhesive 2.0-2.6; superplasticiser S-3 1.0-1.4; scrap ceramic articles ground until complete passage through sieve 014 27.9-28.8; water 34.0-38.0.

EFFECT: high strength of adhesion of the coating to the surface of the coarse aggregate.

2 cl, 2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to the industry of construction materials. The crude mixture for making coarse aggregate coating contains the following, wt %: portland cement 30.0-34.0; casein adhesive 2.0-2.6; thermal power plant flue ash 27.4-28.5; GKZH-11 or GKZH-10 1.5-2.0; water 34.0-38.0.

EFFECT: high strength of adhesion of the coating to the surface of the aggregate.

1 tbl

FIELD: construction.

SUBSTANCE: composition for production of loose heat insulation materials includes wastes of woodworking industry - wood chips, treated with a copper mixture, slaked lime and building gypsum at the following ratio of components (vol. %): Wood chips - 49-68, slaked lime - 20-30, building gypsum - 10-20, copper mixture - 1-2.

EFFECT: increased heat insulating properties, low caking capacity, simplified composition, expansion of a raw materials base and low cost of a heat insulation material.

1 tbl

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