CN103979911A - Stable-size aerated brick and preparation method thereof - Google Patents

Abstract

The invention relates to a stable-size aerated brick, which is prepared from the following raw materials by weight: 9-12 parts of cement, 14-16 parts of quick lime, 8-10 parts of modified sawdust, 6-7 parts of gypsum, 47-53 parts of fly ash, 1-2 parts of polyacrylamide, 2-4 parts of active alumina, 1-2 parts of alkyl benzene sulfonate, 1-1.5 parts of hydroxypropyl starch, 1-1.4 parts of alkenyl succinate, 0.5-1 part of sesbania gum, 0.5-1 part of butyl acrylate, 0.5-1 part of acrylic acid, 0.2-0.3 part of sodium dodecylsulfate, 0.01-0.02 part of ammonium persulfate, 3-5 parts of polycrystal mullite fibers, 7-8 parts of aerated aluminum powder, 8-10 parts of nepheline powder, and a proper amount of water. According to the stable-size aerated brick, nepheline powder and polycrystal mullite fibers are adopted, such that the strength, the wear resistance, the fire resistance, the thermal insulation property, the sound insulation and the size stability of the aerated brick are increased, the drying shrinkage rate is low, and the building safety performance is high; and the modified sawdust is adopted, such that the sound insulation effect and the thermal insulation effect are enhanced, the weight is reduced, the anti-seismic property is increased, and the water reducing effect is good.

Description

A kind of dimensional stabilizing aerated bricks and preparation method thereof

Technical field

The invention belongs to brick field, relate in particular to a kind of dimensional stabilizing 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 dimensional stabilizing aerated bricks and preparation method thereof, this aerated bricks has excellent wear resistance, resistivity against fire, heat retaining property, sound-proofing and dimensional stability, also has high intensity, sound insulation, good heat-insulation effect;

Technical scheme of the present invention is as follows:

A kind of dimensional stabilizing aerated bricks, is characterized in that being made up of the raw material of following weight part: cement 9-12, unslaked lime 14-16, modification sawdust 8-10, gypsum 6-7, flyash 47-53, polyacrylamide 1-2, activated alumina 2-4, alkylbenzene sulfonate 1-2, hydroxypropylated starch 1-1.5, alkenyl succinic acid ester 1-1.4, sesbania gum 0.5-1, butyl acrylate 0.5-1, vinylformic acid 0.5-1, sodium lauryl sulphate 0.2-0.3, ammonium persulphate 0.01-0.02, polycrystalline mullite fibre 3-5, aerating aluminium powder 7-8, nepheline powder 8-10, water are appropriate;

Described modification sawdust is made up of the raw material of following weight part: zirconium phosphate 2-3, sawdust 12-15, Magnesium Silicate q-agent 1-2, red phosphorus 0.4-0.7, borax 0.4-0.6, cobalt naphthenate 0.01-0.02, ethoxylated dodecyl alcohol 0.01-0.02, hydroxyethyl methylacrylate 2-3, high-efficiency water-reducing agent of poly-carboxylic acid 1-2, vinylformic acid 1-2, ammonium persulphate 0.01-0.02, zirconium nitrate 0.5-1.2, crystal whisker of gypsum 3-5, oxidized polyethlene wax 0.8-1, sewer oil 2-3; Making method is: sawdust powder is broken into 50-100 order particle, sprays into while stirring oxidized polyethlene wax, sewer oil, mix rear placement 5-7 hour, then mix with other remaining components, be heated to 75-80 DEG C, dispersion grinding 30-40 minute, to obtain final product.

The preparation method of described dimensional stabilizing aerated bricks, is characterized in that comprising the following steps:

(1) cement, unslaked lime, gypsum, flyash, nepheline powder 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 0.56-0.57 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, by using nepheline powder, polycrystalline mullite fibre, has increased intensity, wear resistance, resistivity against fire, heat retaining property, sound-proofing and the dimensional stability of aerated bricks, and drying shrinkage is low, and building safety performance is high; By using modification sawdust, strengthen sound insulation, effect of heat insulation, alleviate weight, increase anti-seismic performance, water-reducing effect is good simultaneously.

Embodiment

A kind of dimensional stabilizing aerated bricks, by following weight part (kilogram) raw material make: cement 11, unslaked lime 15, modification sawdust 9, gypsum 6.5, flyash 50, polyacrylamide 1.5, activated alumina 3, alkylbenzene sulfonate 1.5, hydroxypropylated starch 1.3, alkenyl succinic acid ester 1.3, sesbania gum 0.8, butyl acrylate 0.8, vinylformic acid 0.7, sodium lauryl sulphate 0.2, ammonium persulphate 0.02, polycrystalline mullite fibre 4, aerating aluminium powder 7.5, nepheline powder 9, water are appropriate;

Described modification sawdust by following weight part (kilogram) raw material make: zirconium phosphate 2.5, sawdust 14, Magnesium Silicate q-agent 1.4, red phosphorus 0.6, borax 0.5, cobalt naphthenate 0.01, ethoxylated dodecyl alcohol 0.01, hydroxyethyl methylacrylate 2.5, high-efficiency water-reducing agent of poly-carboxylic acid 1.5, vinylformic acid 1.5, ammonium persulphate 0.01, zirconium nitrate 0.8, crystal whisker of gypsum 4, oxidized polyethlene wax 0.9, sewer oil 2.5; Making method is: sawdust powder is broken into 80 order particles, sprays into while stirring oxidized polyethlene wax, sewer oil, mix rear placement 6 hours, then mix with other remaining components, be heated to 78 DEG C, dispersion grinding 37 minutes, to obtain final product.

The preparation method of described dimensional stabilizing aerated bricks, comprises the following steps:

(1) cement, unslaked lime, gypsum, flyash, nepheline powder are mixed, send into grinding in ball grinder and become 80 order particles, then mix with the composition except aluminium powder cream, be 0.56 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 608kg/m3, refractory temperature is 720 DEG C, thermal conductivity is 0.09W/(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 70mm, and ultimate compression strength is 7.4Mpa, sound absorption coefficient 0.5.

Claims (2)

1. a dimensional stabilizing aerated bricks, is characterized in that being made up of the raw material of following weight part: cement 9-12, unslaked lime 14-16, modification sawdust 8-10, gypsum 6-7, flyash 47-53, polyacrylamide 1-2, activated alumina 2-4, alkylbenzene sulfonate 1-2, hydroxypropylated starch 1-1.5, alkenyl succinic acid ester 1-1.4, sesbania gum 0.5-1, butyl acrylate 0.5-1, vinylformic acid 0.5-1, sodium lauryl sulphate 0.2-0.3, ammonium persulphate 0.01-0.02, polycrystalline mullite fibre 3-5, aerating aluminium powder 7-8, nepheline powder 8-10, water are appropriate;

Described modification sawdust is made up of the raw material of following weight part: zirconium phosphate 2-3, sawdust 12-15, Magnesium Silicate q-agent 1-2, red phosphorus 0.4-0.7, borax 0.4-0.6, cobalt naphthenate 0.01-0.02, ethoxylated dodecyl alcohol 0.01-0.02, hydroxyethyl methylacrylate 2-3, high-efficiency water-reducing agent of poly-carboxylic acid 1-2, vinylformic acid 1-2, ammonium persulphate 0.01-0.02, zirconium nitrate 0.5-1.2, crystal whisker of gypsum 3-5, oxidized polyethlene wax 0.8-1, sewer oil 2-3; Making method is: sawdust powder is broken into 50-100 order particle, sprays into while stirring oxidized polyethlene wax, sewer oil, mix rear placement 5-7 hour, then mix with other remaining components, be heated to 75-80 DEG C, dispersion grinding 30-40 minute, to obtain final product.

2. the preparation method of dimensional stabilizing aerated bricks according to claim 1, is characterized in that comprising the following steps:

(1) cement, unslaked lime, gypsum, flyash, nepheline powder 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 0.56-0.57 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.