CN103979908A - High strength fireproof aerated brick and preparation method thereof - Google Patents

Abstract

The invention relates to a high strength fireproof aerated brick, which is prepared from the following raw materials by weight: 8-12 parts of cement, 14-16 parts of quick lime, 7-10 parts of modified sawdust, 5-7 parts of fluorine gypsum, 40-50 parts of fly ash, 13-17 parts of micro silicon powder, 3-4 parts of MgO3, 0.5-0.8 part of milled wood lignin, 1.5-2.3 parts of butyl acrylate, 2.5-3.3 parts of dimethyl siloxane, 1-1.4 parts of zinc borate, 0.8-1.6 parts of aluminum hydroxide, 1.1-2.3 parts of zirconium nitrate, 0.08-0.1 part of aluminum powder paste, and a proper amount of water. The high strength fireproof aerated brick has characteristics of high strength, high fire resistance, high compression resistance, high bending resistance, high seepage resistance, high corrosion resistance, high impact resistance and high wear resistance; and the modified sawdust is adopted so as to reduce the dry density and the drying shrinkage value, and the water resistance of the aerated brick is increased with the sawdust treated by waste engine oil.

Description

A kind of high-strength fireproof aerated bricks and preparation method thereof

Technical field

The invention belongs to brick field, relate in particular to a kind of high-strength fireproof aerated bricks and preparation method thereof.

Background technology

Aerated bricks is also called air-entrained concrete building block, application very extensively, be mainly used in load-bearing walling and non-bearing material and the filling enclosure walls around such as materials for wall, infilled wall, floor and roof boarding in mechanical factory building and covil construction.

Aerated bricks has become the leading product of building material industry at present, and country has progressively banned use of clay solid brick, is exactly instead air-entrained concrete building block gradually, autoclaved brick.

That aerated bricks has is lightweight, thermal and insulating performance good, shock resistance is strong, good processability, have certain high thermal resistance, good, the adaptable feature of sound-proofing properties, can be according to the different starting material in locality, different condition is carried out amount body and is surely made, starting material wide material sources, can select river sand, flyash, ore in sand form etc., suit measures to local conditions, can be salvaged, environmental, really turn waste into wealth.

But along with the development of building trade, buildings is more and more higher, moulding is more and more peculiar, the requirements such as intensity to aerated bricks, density, shrinkage value, frost resistance all increase, improving constantly along with people's living standard in addition, requirement to environment is also more and more higher, and the heat-insulating property to buildings, sound absorption qualities, radioactivity have higher requirement, even requires buildings to have the performance of body health benefits, therefore as required, develop the aerated bricks of excellent performance more imperative.

Summary of the invention

The object of the present invention is to provide a kind of high-strength fireproof aerated bricks and preparation method thereof, this aerated bricks has advantages of high strength, high resistivity against fire, high resistance to compression, anti-folding, impervious, anticorrosion, shock resistance and wear resisting property.

Technical scheme of the present invention is as follows:

A kind of high-strength fireproof aerated bricks, is characterized in that being made up of the raw material of following weight part: cement 8-12, unslaked lime 14-16, modification sawdust 7-10, fluorgypsum 5-7, flyash 40-50, SILICA FUME 13-17, MgO3-4, milled wood lignin quality 0.5-0.8, butyl acrylate 1.5-2.3, dimethyl siloxane 2.5-3.3, zinc borate 1-1.4, aluminium hydroxide 0.8-1.6, zirconium nitrate 1.1-2.3, aluminium powder cream 0.08-0.1, water are appropriate;

Described modification sawdust is made up of the raw material of following weight part: sepiolite cashmere 2-3, sawdust 10-13, aerosil 1-2, ureaformal dehyde resin glue 0.4-0.7, isophorone diisocyanate 0.8-1.2, triethylamine 0.06-0.09, containing hydrogen silicone oil emulsion 0.5-0.8, hydroxy-silicone-oil emulsion 0.5-0.8, copper sulfate 0.01-0.02, polyvinyl alcohol 0.5-1.2, potassium hydroxide 0.6-0.7, stearic acid 1-2, calcium chloride 1-2, flyash 3-5, oxidized polyethlene wax 0.8-1, used oil 1-1.5; Making method is: sawdust powder is broken into 50-100 order particle, sprays into while stirring oxidized polyethlene wax, used oil, mix rear placement 5-7 hour, then mix with other remaining components, be heated to 75-80 DEG C, dispersion grinding 20-30 minute, to obtain final product.

The preparation method of described high-strength fireproof aerated bricks, is characterized in that comprising the following steps:

(1) cement, unslaked lime, fluorgypsum, flyash, SILICA FUME, MgO are mixed, send into grinding in ball grinder and become 50-100 order particle, then mix with the composition except aluminium powder cream, be that 0.57-0.58 adds water by ratio of water to material, stir, then add aluminium powder cream, stir and obtain slurry;

(2) slurry (1) step being obtained is poured in mould, obtains brick idiosome;

(3) brick idiosome is put into steam-cured still and vacuumize, then in 1.7-1.9 hour, pass into equably steam, make steam-cured indoor temperature rise to 170-180 DEG C, pressure reaches 11-13MPa, keeps constant 9-12 hour;

(4) in 1.7-1.9 hour, let off steam equably, steam-cured indoor temperature is down to below 70 DEG C, go out still, place 28-30 days and get final product.

Beneficial effect of the present invention

Aerated bricks of the present invention has the feature of high strength and high resistivity against fire, also has advantages of high resistance to compression, anti-folding, impervious, anticorrosion, shock resistance and wear resisting property; By using modification sawdust, reduce dry density and drying shrinkage value, and by the sawdust of used oil processing, improved the water tolerance of aerated bricks.

Embodiment

A kind of high-strength fireproof aerated bricks, by following weight part (kilogram) raw material make: cement 9, unslaked lime 15, modification sawdust 9, fluorgypsum 6, flyash 45, SILICA FUME 15, MgO3.5, milled wood lignin quality 0.6, butyl acrylate 1.9, dimethyl siloxane 2.9, zinc borate 1.2, aluminium hydroxide 1.3, zirconium nitrate 1.9, aluminium powder cream 0.09, water are appropriate;

Described modification sawdust by following weight part (kilogram) raw material make: sepiolite cashmere 2.5, sawdust 12, aerosil 1.5, ureaformal dehyde resin glue 0.5, isophorone diisocyanate 1, triethylamine 0.07, containing hydrogen silicone oil emulsion 0.7, hydroxy-silicone-oil emulsion 0.7, copper sulfate 0.02, polyvinyl alcohol 0.8, potassium hydroxide 0.6, stearic acid 1.5, calcium chloride 1.5, flyash 4, oxidized polyethlene wax 0.9, used oil 1.3; Making method is: sawdust powder is broken into 80 order particles, sprays into while stirring oxidized polyethlene wax, used oil, mix rear placement 6 hours, then mix with other remaining components, be heated to 78 DEG C, dispersion grinding 25 minutes, to obtain final product.

The preparation method of described high-strength fireproof aerated bricks, comprises the following steps:

(1) cement, unslaked lime, fluorgypsum, flyash, SILICA FUME, MgO are mixed, send into grinding in ball grinder and become 80 order particles, then mix with the composition except aluminium powder cream, be 0.57 to add water by ratio of water to material, stir, then add aluminium powder cream, stir and obtain slurry;

(2) slurry (1) step being obtained is poured in mould, obtains brick idiosome;

(3) brick idiosome is put into steam-cured still and vacuumize, then in 1.8 hours, pass into equably steam, make steam-cured indoor temperature rise to 175 DEG C, pressure reaches 12MPa, keeps constant 11 hours;

(4) in 1.8 hours, let off steam equably, make steam-cured indoor temperature be down to 70 DEG C, go out still, place 29 days and get final product.

Experimental data:

The density of this aerated bricks is 660kg/m3, refractory temperature is 690 DEG C, thermal conductivity is 0.15W/(m DEG C), adopt showerhead respectively to the thick clay tile wall of 240mm and aerating brick wall spray, clay tile wall all soaked into after 12 hours, the aerating brick wall spray degree of depth that seeps water after 72 hours is 90mm, and ultimate compression strength is 6.8Mpa, sound absorption coefficient 0.44.

Claims (2)

1. a high-strength fireproof aerated bricks, is characterized in that being made up of the raw material of following weight part: cement 8-12, unslaked lime 14-16, modification sawdust 7-10, fluorgypsum 5-7, flyash 40-50, SILICA FUME 13-17, MgO3-4, milled wood lignin quality 0.5-0.8, butyl acrylate 1.5-2.3, dimethyl siloxane 2.5-3.3, zinc borate 1-1.4, aluminium hydroxide 0.8-1.6, zirconium nitrate 1.1-2.3, aluminium powder cream 0.08-0.1, water are appropriate;

Described modification sawdust is made up of the raw material of following weight part: sepiolite cashmere 2-3, sawdust 10-13, aerosil 1-2, ureaformal dehyde resin glue 0.4-0.7, isophorone diisocyanate 0.8-1.2, triethylamine 0.06-0.09, containing hydrogen silicone oil emulsion 0.5-0.8, hydroxy-silicone-oil emulsion 0.5-0.8, copper sulfate 0.01-0.02, polyvinyl alcohol 0.5-1.2, potassium hydroxide 0.6-0.7, stearic acid 1-2, calcium chloride 1-2, flyash 3-5, oxidized polyethlene wax 0.8-1, used oil 1-1.5; Making method is: sawdust powder is broken into 50-100 order particle, sprays into while stirring oxidized polyethlene wax, used oil, mix rear placement 5-7 hour, then mix with other remaining components, be heated to 75-80 DEG C, dispersion grinding 20-30 minute, to obtain final product.

2. the preparation method of high-strength fireproof aerated bricks according to claim 1, is characterized in that comprising the following steps:

(1) cement, unslaked lime, fluorgypsum, flyash, SILICA FUME, MgO are mixed, send into grinding in ball grinder and become 50-100 order particle, then mix with the composition except aluminium powder cream, be that 0.57-0.58 adds water by ratio of water to material, stir, then add aluminium powder cream, stir and obtain slurry;

(2) slurry (1) step being obtained is poured in mould, obtains brick idiosome;

(3) brick idiosome is put into steam-cured still and vacuumize, then in 1.7-1.9 hour, pass into equably steam, make steam-cured indoor temperature rise to 170-180 DEG C, pressure reaches 11-13MPa, keeps constant 9-12 hour;

(4) in 1.7-1.9 hour, let off steam equably, steam-cured indoor temperature is down to below 70 DEG C, go out still, place 28-30 days and get final product.