CN104609818A - High-strength water-resistant aerated brick containing lithium silicate and preparation thereof - Google Patents

Abstract

The invention relates to a high-strength water-resistant aerated brick containing lithium silicate. The high-strength water-resistant aerated brick is prepared from the following raw materials in parts by weight: 4-5 parts of coal gangue powder, 0.7-1 part of redispersible latex powder, 0.3-0.5 part of calcium formate, 7-9 parts of gypsum, 50-60 parts of coal ash, 6-7 parts of aerated aluminum powder, 8-9 parts of cement, 4-6 parts of blast-furnace ash, 9-11 parts of quick lime, 7-8 parts of modified fly ash, 6-8 parts of silica powder, 0.6-1 parts of stearic acid, 0.8-1.2 parts of lithium silicate and an appropriate amount of water. As the lithium silicate and the redispersible latex powder are used, the strength and the water resistance of the aerated brick are improved. As the silica powder is added, the abrasive resistance of the aerated brick is improved. Meanwhile, the aerated brick is good in corrosion resistance, fire resistance, heat preservation, sound insulation and size dimensional stability. As the modified fly ash is used, the heat insulation effect is improved, the water resistance is good, the environmental pollution is reduced, and the water reducing effect is good.

Description

A kind of containing lithium silicate high-strength water-resistance aerated bricks and preparation method thereof

Technical field

The invention belongs to brick field, particularly relate to a kind of containing lithium silicate high-strength water-resistance aerated bricks and preparation method thereof.

Background technology

Aerated bricks is also called air-entrained concrete building block, application very extensive, is mainly used in the load-bearing wallings such as the materials for wall in machinery plant and covil construction, infilled wall, floor and roof boarding and non-bearing material and filling enclosure wall around.

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

Aerated bricks have 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 according to the different starting material in locality, different condition is carried out amount body and is surely made, raw material sources is extensive, river sand, flyash, ore in sand form etc. can be selected, 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, require all to increase to the intensity, density, shrinkage value, frost resistance etc. of aerated bricks, improving constantly in addition along with people's living standard, also more and more higher to the requirement of environment, there is higher requirement to the heat-insulating property of buildings, sound absorption qualities, radioactivity, even require that buildings has the performance of body health benefits, therefore as required, the aerated bricks developing excellent performance is more imperative.

Summary of the invention

The object of the present invention is to provide a kind of containing lithium silicate high-strength water-resistance aerated bricks and preparation method thereof, this aerated bricks intensity is high, water-tolerant, and wear resistance is good, also has good erosion resistance, resistivity against fire, heat retaining property, sound-proofing and dimensional stability.

Technical scheme of the present invention is as follows:

A kind of containing lithium silicate high-strength water-resistance aerated bricks, it is characterized in that being made up of the raw material of following weight part: colliery powder 4-5, redispersable latex powder 0.7-1, calcium formiate 0.3-0.5, gypsum 7-9, flyash 50-60, aerating aluminium powder 6-7, cement 8-9, blast-furnace dust 4-6, unslaked lime 9-11, modified coal 7-8, silica flour 6-8, stearic acid 0.6-1, lithium silicate 0.8-1.2, water are appropriate;

Described modified coal is made up of the raw material of following weight part: coal ash 13-15, lithium silicate 0.5-0.7, magnesium silicofluoride 1-2, aluminum stearate 0.5-0.7, sugared calcium 0.5-0.8, glycidyl methacrylate 0.5-0.7, Diisopropyl azodicarboxylate 0.1-0.2, acrylate 1-1.3, tea seed cake 1-2, multicellular glass powder 1-2, high-efficiency water-reducing agent of poly-carboxylic acid 2-3, kautschin 0.4-0.7, flyash 2-4, calcium sulfite 0.5-0.7, used oil 2-3; Making method is: coal ash, tea seed cake powder are broken into 100-200 order particle, spray into kautschin, used oil, aluminum stearate while stirring, mixes rear placement 5-7 hour, mix with other remaining components again, be heated to 75-80 DEG C, dispersion grinding 30-40 minute, obtain final product.

The described preparation method containing lithium silicate high-strength water-resistance aerated bricks, is characterized in that comprising the following steps:

(1) by colliery powder, cement, silica flour, blast-furnace dust, unslaked lime, gypsum, flyash mixing, send into grinding in ball grinder and become 100-200 order particle, mix with the composition except aerating aluminium powder again, be that 0.57-0.58 adds water by ratio of water to material, stir, add aerating aluminium powder again, stir and obtain slurry;

(2) slurry that (1) step obtains is poured in mould, obtain brick idiosome;

(3) brick idiosome is put into steam-cured still to vacuumize, then in 1.7-1.9 hour, pass into steam equably, make the temperature of steam-cured indoor rise to 170-180 DEG C, pressure reaches 11-13MPa, keeps constant 10-11 hour;

(4) let off steam equably in 1.7-1.9 hour, make the temperature of steam-cured indoor be down to less than 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 is by using lithium silicate, redispersable latex powder, add intensity and the water tolerance of aerated bricks, by adding silica flour, add the wear resistance of aerated bricks, this aerated bricks also has good erosion resistance, resistivity against fire, heat retaining property, sound-proofing and dimensional stability simultaneously; By using modified coal, enhancing effect of heat insulation, water-tolerant, decreasing environmental pollution, water-reducing effect is good simultaneously.

Embodiment

A kind of containing lithium silicate high-strength water-resistance aerated bricks, be made up of the raw material of following weight part (kilogram): colliery powder 4.5, redispersable latex powder 0.9, calcium formiate 0.4, gypsum 8, flyash 55, aerating aluminium powder 6.5, cement 8.6, blast-furnace dust 5, unslaked lime 10, modified coal 7.5, silica flour 7, stearic acid 0.8, lithium silicate 1, water are appropriate;

Described modified coal is made up of the raw material of following weight part (kilogram): coal ash 14, lithium silicate 0.6, magnesium silicofluoride 1.5, aluminum stearate 0.6, sugared calcium 0.6, glycidyl methacrylate 0.6, Diisopropyl azodicarboxylate 0.1, acrylate 1.2, tea seed cake 1.5, multicellular glass powder 1.5, high-efficiency water-reducing agent of poly-carboxylic acid 2.5, kautschin 0.6, flyash 3, calcium sulfite 0.6, used oil 2.6; Making method is: coal ash, tea seed cake powder are broken into 160 order particles, spray into kautschin, used oil, aluminum stearate while stirring, mix rear placement 6 hours, then mix with other remaining components, be heated to 78 DEG C, dispersion grinding 36 minutes, to obtain final product.

The described preparation method containing lithium silicate high-strength water-resistance aerated bricks, comprises the following steps:

(1) by colliery powder, cement, silica flour, blast-furnace dust, unslaked lime, gypsum, flyash mixing, send into grinding in ball grinder and become 160 order particles, mix with the composition except aerating aluminium powder again, be 0.57 add water by ratio of water to material, stir, add aerating aluminium powder again, stir and obtain slurry;

(2) slurry that (1) step obtains is poured in mould, obtain brick idiosome;

(3) brick idiosome is put into steam-cured still to vacuumize, then in 1.7 hours, pass into steam equably, make the temperature of steam-cured indoor rise to 176 DEG C, pressure reaches 12MPa, keeps constant 11 hours;

(4) let off steam equably in 1.8 hours, make the temperature of steam-cured indoor 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 640kg/m3, refractory temperature is 700 DEG C, thermal conductivity is 0.14W/(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 degree of depth that seeps water after spraying 72 hours is 50mm, and ultimate compression strength is 6.2Mpa, sound absorption coefficient 0.4.

Claims (2)

1. containing a lithium silicate high-strength water-resistance aerated bricks, it is characterized in that being made up of the raw material of following weight part: colliery powder 4-5, redispersable latex powder 0.7-1, calcium formiate 0.3-0.5, gypsum 7-9, flyash 50-60, aerating aluminium powder 6-7, cement 8-9, blast-furnace dust 4-6, unslaked lime 9-11, modified coal 7-8, silica flour 6-8, stearic acid 0.6-1, lithium silicate 0.8-1.2, water are appropriate;

Described modified coal is made up of the raw material of following weight part: coal ash 13-15, lithium silicate 0.5-0.7, magnesium silicofluoride 1-2, aluminum stearate 0.5-0.7, sugared calcium 0.5-0.8, glycidyl methacrylate 0.5-0.7, Diisopropyl azodicarboxylate 0.1-0.2, acrylate 1-1.3, tea seed cake 1-2, multicellular glass powder 1-2, high-efficiency water-reducing agent of poly-carboxylic acid 2-3, kautschin 0.4-0.7, flyash 2-4, calcium sulfite 0.5-0.7, used oil 2-3; Making method is: coal ash, tea seed cake powder are broken into 100-200 order particle, spray into kautschin, used oil, aluminum stearate while stirring, mixes rear placement 5-7 hour, mix with other remaining components again, be heated to 75-80 DEG C, dispersion grinding 30-40 minute, obtain final product.

2. the preparation method containing lithium silicate high-strength water-resistance aerated bricks according to claim 1, is characterized in that comprising the following steps:

(1) by colliery powder, cement, silica flour, blast-furnace dust, unslaked lime, gypsum, flyash mixing, send into grinding in ball grinder and become 100-200 order particle, mix with the composition except aerating aluminium powder again, be that 0.57-0.58 adds water by ratio of water to material, stir, add aerating aluminium powder again, stir and obtain slurry;

(2) slurry that (1) step obtains is poured in mould, obtain brick idiosome;

(3) brick idiosome is put into steam-cured still to vacuumize, then in 1.7-1.9 hour, pass into steam equably, make the temperature of steam-cured indoor rise to 170-180 DEG C, pressure reaches 11-13MPa, keeps constant 10-11 hour;

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