CN109678424A - A kind of autoclave aerated concrete building block and preparation method thereof - Google Patents
A kind of autoclave aerated concrete building block and preparation method thereof Download PDFInfo
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- CN109678424A CN109678424A CN201910029544.3A CN201910029544A CN109678424A CN 109678424 A CN109678424 A CN 109678424A CN 201910029544 A CN201910029544 A CN 201910029544A CN 109678424 A CN109678424 A CN 109678424A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/021—Ash cements, e.g. fly ash cements ; Cements based on incineration residues, e.g. alkali-activated slags from waste incineration ; Kiln dust cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/08—Slag cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/02—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding chemical blowing agents
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
The invention discloses a kind of autoclave aerated concrete building blocks and preparation method thereof, its key points of the technical solution are that a kind of autoclave aerated concrete building block, based on parts by weight, including following component: 65-75 parts of CHARACTERISTICS OF TAILINGS SAND, 10-15 parts of cement, 10-15 parts of lime, 1-3 parts of gypsum, 0.4-0.6 parts of aluminium powder, 1-2 parts of lignocellulosic, 0.2-0.3 parts of antimitotic agent and 60-70 parts of water；Based on parts by weight, the antimitotic agent includes that 6-10 parts of Diacetone Acrylamide, 2-4 parts of glass bead, 1-2 parts of silicon powder, 0.6-0.8 parts of hydroxypropyl methyl cellulose and 0.3-0.5 parts of bentonite are uniformly mixed and form.The present invention passes through the cooperation of lignocellulosic and antimitotic agent, and the cracking resistance of air-entrained concrete building block on the one hand can be improved, on the other hand can also improve the water-retaining property of air-entrained concrete building block, reduce its absorption to moisture in masonry or decorative mortar.
Description
Technical field
The present invention relates to air entrained concrete technical fields, more specifically, it is related to a kind of autoclave aerated concrete building block
And preparation method thereof.
Background technique
Air-entrained concrete building block be with siliceous material (quartz sand, flyash and containing silicon tailings etc.) and calcareous material (lime,
Cement) it is primary raw material, it adds foaming agent (aluminium powder), passes through the techniques such as ingredient, stirring, casting, precuring, cutting, steam pressure, maintenance
Light porous silicate product made of process.Air-entrained concrete building block has light capacity, thermal insulation property height, sound-absorbing effect good,
Have many advantages, such as certain intensity and machinability, can be widely applied to all kinds of building inside and outside walls and building heat preservation wall and building
In decorative engineering.Air-entrained concrete building block is broadly divided into steam pressure sand aerated concrete block and aerated coal ash concrete is built
Block, the two compare, and under same bulk density, the intensity of steam pressure sand concrete building block is bigger, and thermal coefficient is lower, and frost resistance is more
It is good, it is with the obvious advantage, it is the better choice of Self-thermal-insulation System；And the advantage of aerated coal ash concrete is can use
Industrial waste flyash is advantageously implemented the recycling of resource；And it can replace quartz as a kind of industrial waste containing silicon tailings
Sand not only with the advantage of sand material, and can also can be realized the recycling of resource, can effectively reduce and be produced into
This.
In the prior art, application No. is 200410036554.3 Chinese patents, and it is steam pressurized to disclose a kind of gold tailings
Concrete segment and production method, the main production raw material of concrete segment be gold tailings slag, cement, quick lime, aluminium powder and
Water.It is main to make composition of raw materials charge ratio according to weight percent are as follows: gold tailings slag and 60-70 %, cement 6-10%, raw stone
Grey 20-30%, aluminium powder 0.01-0.05%, water consumption are to be enough that the thin pulp density of gold tailings sizing is made to meet the requirements.
The characteristics of air-entrained concrete building block is the 60-75% that stomata with porous structure, in building block accounts for about its volume, and
These stomatas are divided into intercommunicating pore and blind hole, due to the presence in both holes, cause air-entrained concrete building block water absorption more and
Slowly, although this can make it have good anti-permeability performance, also cause its wet guilding poor, in the process of construction, in order to
The adhesion strength for improving mortar and air-entrained concrete building block, needs to sprinkle water on air-entrained concrete building block, makes its surface wettability, but
The structure due to air-entrained concrete building block stomata, cause it to be surface wettability and it is internal be not wet, with mortar to mixed
Solidifying earth building blocks are built or are plastered after construction, and concrete segment can absorb moisture from mortar again, and mortar is caused to become
Dry and easy cracking, thus the problems such as making coat of plaster generate decortication, hollowing；Furthermore the drying shrinkage of air-entrained concrete building block itself becomes
When shape is big, the defect that air-entrained concrete building block is easy to appear cracking will lead to, to reduce the durability of wall.Therefore, how
The cracking resistance for improving autoclave aerated concrete building block, is a problem to be solved.
Summary of the invention
One of the objects of the present invention is to provide a kind of autoclave aerated concrete building blocks, pass through lignocellulosic and cracking resistance
On the one hand the cracking resistance of air-entrained concrete building block can be improved in the cooperation of agent, on the other hand can also improve air entrained concrete
The water-retaining property of building block reduces its absorption to moisture in masonry or decorative mortar.
Above-mentioned technical purpose of the invention has the technical scheme that
A kind of autoclave aerated concrete building block, based on parts by weight, including following component: 65-75 parts of CHARACTERISTICS OF TAILINGS SAND, cement 10-15
Part, 10-15 parts of lime, 1-3 parts of gypsum, 0.4-0.6 parts of aluminium powder, 1-2 parts of lignocellulosic, 0.2-0.3 parts of antimitotic agent and water
60-70 parts；Based on parts by weight, the antimitotic agent includes 6-10 parts of Diacetone Acrylamide, 2-4 parts of glass bead, silicon powder
1-2 parts, 0.6-0.8 parts of hydroxypropyl methyl cellulose and 0.3-0.5 parts of bentonite are uniformly mixed and form.
By using above-mentioned technical proposal, the specific gravity of lignocellulosic is small, is keeping light excellent of air-entrained concrete building block
Outside gesture, the drying shrinkage of concrete segment can also be reduced, improve the cracking resistance of air-entrained concrete building block itself and is resisted
Compressive Strength；Antimitotic agent and lignocellulosic and used time, cracking resistance, the frost resistance of air-entrained concrete building block on the one hand can be improved
Energy and workability, on the other hand can also improve the water-retaining property and wet guilding of air-entrained concrete building block, reduce it to masonry
Or in decorative mortar moisture absorption, so as to improve the durability of wall.
Further, the CHARACTERISTICS OF TAILINGS SAND is the gold tailings sand that dioxide-containing silica is greater than 80%.
By using above-mentioned technical proposal, gold tailings sand belongs to industrial solid castoff, and dioxide-containing silica is greater than
80%, the hydrated product stability for reacting generation is good, and intensity index height, drying shrinkage value are small after steam press maintenance, can keep adding
The stability of gas concrete segment performance.
Further, the lime is the quick lime that active oxidation calcium content is greater than 80%, 0.08mm square hole screen screen over-size
For 4-8%.
By using above-mentioned technical proposal, the main component of quick lime is that calcium oxide can when calcium oxide and water react
To release a large amount of heat, promote the generation of hydrated gel, be conducive to the control of production technology, to ensure that product quality；
And improve the fineness of quick lime, it is possible to reduce the volume expansion during quicklime slaking reduces the feelings that green body cracks
Condition, and 0.08mm square hole screen screen over-size is advisable for 4-8%, when the fineness of quick lime is too small, then can improve digestion rate, influences
The stability poured.
Further, the gypsum is desulfurized gypsum.
By using above-mentioned technical proposal, the main component of desulfurized gypsum is calcium sulphate dihydrate, with other as gypsum
Gypsum is compared and desulfurization gypsum powder has the characteristics that renewable, granularity is small, stable components, objectionable impurities content are few, with high purity, is belonged to
In ep-type material, desulfurized gypsum has the advantages that improve the intensity of building block, reduces and shrink.
Further, the aluminium powder is the aluminium powder that aluminium content is greater than 90%.
By using above-mentioned technical proposal, aluminium powder can be such that concrete builds as the foaming agent in air-entrained concrete building block
The inside of block generates a large amount of sealed porosity, make concrete segment have good soundproof effect, anti-seismic performance, thermal insulation property with
And anti-permeability performance.
Further, the cement be strength grade be 42.5 ordinary portland cement, portland slag cement and
One of Portland fly ash cement.
By using above-mentioned technical proposal, cement be strength grade be 42.5 ordinary portland cement, slag portland
One of cement and Portland fly ash cement can achieve required intensity.
The second object of the present invention is to provide a kind of preparation method of autoclave aerated concrete building block.
Above-mentioned technical purpose of the invention has the technical scheme that
A kind of preparation method of autoclave aerated concrete building block, includes the following steps:
(1) it ingredient: after CHARACTERISTICS OF TAILINGS SAND is ground to 0.08mm square hole screen screen over-size less than 20%, adds water and stirs, obtains slurry；
(2) it pours and rests: slurry, cement, lime, gypsum, aluminium powder, lignocellulosic and antimitotic agent being stirred evenly, then
After being poured into the mold, 40-60 DEG C at a temperature of, rest 2-3h, obtains building block green body；
(3) steam press maintenance: it will be cut and be organized into groups after the demoulding of building block green body, and then placed it in temperature and be 190-200 DEG C, press
By force under conditions of 0.9-1.3MPa, steam-cured 8-12h obtains autoclave aerated concrete building block.
By using above-mentioned technical proposal, each raw material is stirred, is poured, is rested, cut marshalling and steam curing conservation after make
The autoclave aerated concrete building block obtained has good cracking resistance, anti-freezing property, and its primary raw material is trade waste,
The recycling that resource may be implemented meets environmentally protective requirement.
Further, the mixing speed in step (1) is 800-1000r/min.
By using above-mentioned technical proposal, CHARACTERISTICS OF TAILINGS SAND is stirred evenly with water with 800-1000r/min, can reduce layering
Generation, improve the stability of slurry.
Further, the mixing speed in step (2) is 2000-3000r/min.
By using above-mentioned technical proposal, with the speed of 2000-3000r/min to each raw material high-speed stirred, high speed shear
Power can make raw material mixing sufficiently, be conducive to the intensity and hardness that improve building block.
In conclusion the present invention has the advantages that compared with the prior art
1. the specific gravity of lignocellulosic is small, outside the advantage for keeping air-entrained concrete building block light, concrete block can also be reduced
The cracking resistance and compression strength of air-entrained concrete building block itself can be improved in the drying shrinkage of block；Antimitotic agent with it is wooden
Cellulose and used time, the cracking resistance, anti-freezing property and workability of air-entrained concrete building block, another party on the one hand can be improved
Face can also improve the water-retaining property and wet guilding of air-entrained concrete building block, reduce its suction to moisture in masonry or decorative mortar
It receives, so as to improve the durability of wall；
2. lignocellulosic belongs to plant fiber, there are many capillary channels in fiber, thus it is wet that leading for building block can be improved
Property, simultaneously with Diacetone Acrylamide, glass bead, silicon powder, hydroxypropyl methyl cellulose and the bentonite in antimitotic agent
The compactness of building block can be improved in used time, so as to make up the defect of building block impermeability reduction；
3. siliceous material selects trade waste CHARACTERISTICS OF TAILINGS SAND, the recycling of resource may be implemented, economize on resources, reduce cost；It is former
Expect pollution-free, radiationless, belongs to green structural material.
Specific embodiment
Invention is further described in detail below.
One, the Diacetone Acrylamide in the following preparation example of the preparation example of antimitotic agent is selected from Shandong richness Shun new material science and technology and has
The Diacetone Acrylamide of limit company production；The trade mark that hydroxypropyl methyl cellulose is selected from the auspicious safe production in Shandong is 60RT4000's
Hydroxypropyl methyl cellulose；The fineness that silicon powder is selected from the production of Jiangsu Zhong Sheng silicon materials Science and Technology Ltd. is micro- for the silicon of 600 mesh
Powder；The fineness that bentonite is selected from the production of Luoshan Hong Jun bentonite factory is the nano-bentonite of 200 mesh.
Preparation example 1: by Diacetone Acrylamide 6kg, glass bead 2kg, silicon powder 1kg, hydroxypropyl methyl cellulose
With the speed of 600r/min after mixing evenly, antimitotic agent is made in 0.6kg and bentonite 0.3kg.
Preparation example 2: by Diacetone Acrylamide 8kg, glass bead 3kg, silicon powder 1.5kg, hydroxypropyl methyl cellulose
With the speed of 600r/min after mixing evenly, antimitotic agent is made in 0.7kg and bentonite 0.4kg.
Preparation example 3: by Diacetone Acrylamide 10kg, glass bead 4kg, silicon powder 2kg, hydroxypropyl methyl cellulose
With the speed of 600r/min after mixing evenly, antimitotic agent is made in 0.8kg and bentonite 0.5kg.
Preparation example 4: this preparation example and preparation example 1 the difference is that, Diacetone Acrylamide, glass are not included in raw material
Change microballon and bentonite.
Two, EXAMPLE Example 1: a kind of autoclave aerated concrete building block is prepared with the following method:
(1) it is small that the gold tailings sand that 65kg, dioxide-containing silica are greater than 80% ingredient: is ground to 0.08mm square hole screen screen over-size
After 20%, is stirred evenly after 60kg water is added with the speed of 800r/min, obtain slurry；
(2) it pours and rests: by slurry, cement 10kg, lime 10kg, desulfurized gypsum 1kg, aluminium powder 0.4kg, lignocellulosic 1kg
And antimitotic agent 0.2kg is stirred evenly with the speed of 2000r/min, after then being poured into the mold, 40 DEG C at a temperature of, it is quiet
2h is supported, building block green body is obtained；Wherein cement is the ordinary portland cement that strength grade is 42.5, and lime contains for active calcium oxide
Amount is greater than 80% quick lime, and 0.08mm square hole screen screen over-size is 4%, and aluminium powder is the aluminium powder that aluminium content is greater than 90%, antimitotic agent
The antimitotic agent prepared selected from preparation example 1；
(3) steam press maintenance: it will be cut and be organized into groups after the demoulding of building block green body, and then place it in that temperature will be 190 DEG C, pressure is
Under conditions of 0.9MPa, steam-cured 8h obtains autoclave aerated concrete building block.
Embodiment 2: a kind of autoclave aerated concrete building block is prepared with the following method:
(1) it is small that the gold tailings sand that 70kg, dioxide-containing silica are greater than 80% ingredient: is ground to 0.08mm square hole screen screen over-size
After 20%, is stirred evenly after 65kg water is added with the speed of 900r/min, obtain slurry；
(2) it pours and rests: by slurry, cement 12.5kg, lime 12.5kg, desulfurized gypsum 2kg, aluminium powder 0.5kg, lignocellulosic
1.5kg and antimitotic agent 0.25kg are stirred evenly with the speed of 2500r/min, after then being poured into the mold, in 50 DEG C of temperature
Under degree, rest 2.5h, obtains building block green body；Wherein cement is the portland slag cement that strength grade is 42.5, and lime is to live
Property calcium oxide content be greater than 80% quick lime, 0.08mm square hole screen screen over-size be 6%, aluminium powder be aluminium content be greater than 90% aluminium
Powder, antimitotic agent are selected from antimitotic agent prepared by preparation example 2；
(3) steam press maintenance: it will be cut and be organized into groups after the demoulding of building block green body, and then place it in that temperature will be 195 DEG C, pressure is
Under conditions of 1.1MPa, steam-cured 10h obtains autoclave aerated concrete building block.
Embodiment 3: a kind of autoclave aerated concrete building block is prepared with the following method:
(1) it is small that the gold tailings sand that 75kg, dioxide-containing silica are greater than 80% ingredient: is ground to 0.08mm square hole screen screen over-size
After 20%, is stirred evenly after 70kg water is added with the speed of 1000r/min, obtain slurry；
(2) it pours and rests: by slurry, cement 15kg, lime 15kg, desulfurized gypsum 3kg, aluminium powder 0.6kg, lignocellulosic 2kg
And antimitotic agent 0.3kg is stirred evenly with the speed of 3000r/min, after then being poured into the mold, 60 DEG C at a temperature of, it is quiet
3h is supported, building block green body is obtained；Wherein cement is the Portland fly ash cement that strength grade is 42.5, and lime is active calcium oxide
Content is greater than 80% quick lime, and 0.08mm square hole screen screen over-size is 4-8%, and aluminium powder is the aluminium powder that aluminium content is greater than 90%, resists
It splits agent and is selected from antimitotic agent prepared by preparation example 3；
(3) steam press maintenance: it will be cut and be organized into groups after the demoulding of building block green body, and then placed it in temperature and be 190-200 DEG C, press
By force under conditions of 0.9-1.3MPa, steam-cured 8-12h obtains autoclave aerated concrete building block.
Three, comparative example comparative example 1: this comparative example difference from example 1 is that, wood fibre is not added in raw material
Element and antimitotic agent.
Comparative example 2: this comparative example difference from example 1 is that, lignocellulosic is not added in raw material.
Comparative example 3: this comparative example difference from example 1 is that, antimitotic agent is not added in raw material.
Comparative example 4: this comparative example difference from example 1 is that, antimitotic agent in raw material is prepared by preparation example 4
Antimitotic agent.
Four, application examples: the surface of autoclave aerated concrete building block is sprinkled into a certain amount of water, makes its surface wettability, then
The decorative mortar of equivalent is smeared on the surface of autoclave aerated concrete building block after watering, detects the cracking feelings on decorative mortar surface
Condition, wherein decorative mortar is selected from the polymer plastering sand of the model kh-132 of Nanjing Kuang Hao construction material Co., Ltd production
Slurry, the water retention of the polymer decorative mortar are 70%, and backfin ratio is 1:2.Backfin ratio is mortar compression strength and flexural strength
Ratio, be a nondimensional parameter, for reflecting the anti-cracking performance of mortar, regulation backfin ratio wants≤3.0 in standard, pressure
Folding shows that the flexibility of mortar is better, the performance for resisting cracking resistance is better than smaller；Application examples 1 is prepared using embodiment 1
Autoclave aerated concrete building block, the autoclave aerated concrete building block that application examples 2 is prepared using comparative example 1, application examples 3 use
Be comparative example 2 prepare autoclave aerated concrete building block, the steam pressurized coagulation that application examples 4 is prepared using comparative example 3
Earth building blocks, the autoclave aerated concrete building block that application examples 5 is prepared using comparative example 4.According to JG/T230-2007 " pre- sand cutting
Slurry ", the performance for the decorative mortar being applied on application examples 1-5 is tested, test result is shown in table 1.
Table 1
It can be seen from 1 data of table on autoclave aerated concrete building block prepared by the present invention smear decorative mortar after, with when
Between extension, the fall of water retention is smaller, and the increasing degree of its backfin ratio is also smaller, illustrates steam pressure of the invention
Air-entrained concrete building block is had excellent performance, and in construction, of the invention has preferable wet guilding and water-retaining property, will not be excessive
Slave decorative mortar on absorb moisture, the performance of decorative mortar is influenced smaller, the durability of wall can be improved.
In application examples 2, relative to application examples 1, the water retention of decorative mortar and backfin ratio are substantially reduced in application examples 2,
Illustrate the concrete segment prepared by comparative example 1 can decorative mortar have negative consequence, illustrate the lignocellulosic in raw material with
And the quality of concrete segment can be improved in the addition of antimitotic agent, reduces suction of the concrete segment to the moisture from decorative mortar
It receives, improves the durability of wall.
In application examples 3, compared to application examples 1, the water retention of decorative mortar and backfin ratio are substantially reduced in application examples 3,
Illustrate that the concrete segment prepared by comparative example 2 meeting decorative mortar has negative consequence, illustrates that the lignocellulosic in raw material adds
Enter the quality of concrete segment can be improved, reduces absorption of the concrete segment to the moisture from decorative mortar, improve wall
Durability；Compared to application examples 2, water retention and backfin in application examples 3 are than the water retention and pressure that are better than in application examples 2
Ratio is rolled over, illustrates that antimitotic agent is conducive to improve the water retention and backfin ratio of mortar, but itself and lignocellulosic and used time, have
Synergistic effect, better effect.
In application examples 4, compared to application examples 1, the water retention of decorative mortar and backfin ratio are substantially reduced in application examples 4,
Illustrate that the quality that concrete segment can be improved is added in the antimitotic agent in raw material, reduces concrete segment to the water from decorative mortar
The absorption divided, improves the durability of wall；Compared to application examples 2, water retention and backfin ratio in application examples 4 are better than application
Water retention and backfin ratio in example 2, illustrate lignocellulosic be conducive to improve mortar water retention and backfin ratio, but its
With antimitotic agent and used time, there is synergistic effect, better effect.
In application examples 5, compared to application examples 1, the water retention of decorative mortar and backfin ratio are substantially reduced in application examples 5,
Illustrate that the quality that concrete segment can be improved is added in the Diacetone Acrylamide in antimitotic agent, glass bead and bentonite,
Absorption of the concrete segment to the moisture from decorative mortar is reduced, the durability of wall is improved；Compared to application examples 4, application examples 5
In water retention and backfin it is smaller than amplitude of variation, it is double for illustrating to primarily serve water conservation in antimitotic agent, leading the raw material of wet effect
Acetone acrylamide, glass bead and bentonite.
Five, performance test " adds according to GB11968-2006 " autoclave aerated concrete building block standard ", GB/T11972-1997
Gas concrete drying shrinkage test method ", the JISA5416-2007 lightweight concrete slab of processing " steam pressure ", by embodiment 1-3 with
And the performance of the autoclave aerated concrete building block of comparative example 1-4 preparation is tested, and test result is shown in table 2.
Table 2
Drying shrinkage can be used to characterize the cracking resistance of concrete segment；After concrete segment stops maintenance, it is placed in and does not satisfy
The irreversible contraction occurred with the concrete segment in air because losing the absorption water in internal capillary hole and gel pore, it is referred to as dry
Dry contraction distortion, abbreviation drying shrinkage, therefore the drying shrinkage of concrete segment is lower, illustrates that its cracking resistance is better.
Autoclave aerated concrete building block prepared by the present invention has good compression strength, anti-it can be seen from 2 data of table
Freeze performance and preferable workability, and have lower thermal coefficient and drying shrinkage, illustrates that steam pressure of the invention adds
Gas concrete segment has good thermal insulation property and cracking resistance, and dry density rank is B06, strength grade A3.5.
Lignocellulosic and antimitotic agent are not added in the raw material of comparative example 1, relative to embodiment 1, the resistance to compression of comparative example 1
Intensity, frost resistance are substantially reduced, and illustrate that lignin fibre and antimitotic agent of the invention can be obviously improved concrete segment
Compression strength and anti-freezing property；And the drying shrinkage in comparative example 1 is significantly raised, illustrates the lignocellulosic in the present invention
And antimitotic agent can be obviously improved the cracking resistance of concrete segment.
It is not added with lignocellulosic in the raw material of comparative example 2, it is compression strength in comparative example 2, anti-relative to embodiment 1
Jelly property is substantially reduced, and illustrates that lignin fibre of the invention can be obviously improved the compression strength and frost resistance of concrete segment
Energy；And drying shrinkage is significantly raised, illustrates that the lignocellulosic in the present invention can be obviously improved the cracking resistance of concrete segment
Performance；Compared to comparative example 1, the drying shrinkage of comparative example 2 is lower than the drying shrinkage of comparative example 1, illustrates lignocellulosic
And the antimitotic agent cracking performance that simultaneously used time resists concrete segment is more preferably, has synergistic effect well.
It is not added with antimitotic agent in the raw material of comparative example 3, compared to embodiment 1, the frost resistance in comparative example 3 is substantially reduced,
Illustrate that antimitotic agent of the invention can be obviously improved the anti-freezing property of concrete segment；And drying shrinkage is significantly raised, explanation
Antimitotic agent in the present invention can be obviously improved the cracking resistance of concrete segment；Compared to comparative example 1, the drying of comparative example 3
Shrinking percentage is lower than the drying shrinkage of comparative example 1, illustrates lignocellulosic and antimitotic agent and the used time resists concrete segment
Cracking performance more preferably, has synergistic effect well.
Antimitotic agent in comparative example 4 is selected from antimitotic agent prepared by preparation example 4, does not include diacetone third in the raw material of antimitotic agent
Acrylamide, glass bead and bentonite, compared to embodiment 1, the frost resistance in comparative example 3 is substantially reduced, and illustrates antimitotic agent
In Diacetone Acrylamide, glass bead and bentonite can be obviously improved the anti-freezing property of concrete segment；And it dries
Shrinking percentage is significantly raised, and it is mixed to illustrate that the Diacetone Acrylamide in antimitotic agent, glass bead and bentonite can be obviously improved
The cracking resistance of solidifying earth building blocks；Compared to comparative example 3,4 performance change of comparative example is smaller, illustrates that antimitotic agent primarily serves cracking resistance work
Raw material is Diacetone Acrylamide, glass bead and bentonite.
In conclusion lignocellulosic can reduce the drying shrinkage of concrete segment, concrete segment itself is improved
Cracking resistance and compression strength；Antimitotic agent and lignocellulosic and used time have synergistic effect, on the one hand can be improved and add
Cracking resistance, anti-freezing property and the workability of gas concrete segment, on the other hand can also improve air-entrained concrete building block
Water-retaining property and wet guilding reduce its absorption to moisture in masonry or decorative mortar, so as to improve the durability of wall.
This specific embodiment is only explanation of the invention, is not limitation of the present invention, those skilled in the art
Member can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as at this
All by the protection of Patent Law in the scope of the claims of invention.
Claims (9)
1. a kind of autoclave aerated concrete building block, it is characterised in that: based on parts by weight, including following component:
65-75 parts of CHARACTERISTICS OF TAILINGS SAND, 10-15 parts of cement, 10-15 parts of lime, 1-3 parts of gypsum, 0.4-0.6 parts of aluminium powder, lignocellulosic
1-2 parts, 0.2-0.3 parts of antimitotic agent and 60-70 parts of water；
Based on parts by weight, the antimitotic agent includes 6-10 parts of Diacetone Acrylamide, 2-4 parts of glass bead, silicon powder 1-2
Part, 0.6-0.8 parts of hydroxypropyl methyl cellulose and 0.3-0.5 parts of bentonite are uniformly mixed and form.
2. a kind of autoclave aerated concrete building block according to claim 1, it is characterised in that: the CHARACTERISTICS OF TAILINGS SAND is titanium dioxide
Silicone content is greater than 80% gold tailings sand.
3. a kind of autoclave aerated concrete building block according to claim 1, it is characterised in that: the lime is active oxidation
Calcium content is greater than 80% quick lime, and 0.08mm square hole screen screen over-size is 4-8%.
4. a kind of autoclave aerated concrete building block according to claim 1, it is characterised in that: the gypsum is desulfurization stone
Cream.
5. a kind of autoclave aerated concrete building block according to claim 1, it is characterised in that: the aluminium powder is that aluminium content is big
In 90% aluminium powder.
6. a kind of autoclave aerated concrete building block according to claim 1, it is characterised in that: the cement is strength grade
For 42.5 one of ordinary portland cement, portland slag cement and Portland fly ash cement.
7. a kind of preparation method of autoclave aerated concrete building block as claimed in any one of claims 1 to 6, it is characterised in that:
Include the following steps:
(1) it ingredient: after CHARACTERISTICS OF TAILINGS SAND is ground to 0.08mm square hole screen screen over-size less than 20%, adds water and stirs, obtains slurry；
(2) it pours and rests: slurry, cement, lime, gypsum, aluminium powder, lignocellulosic and antimitotic agent being stirred evenly, then
After being poured into the mold, 40-60 DEG C at a temperature of, rest 2-3h, obtains building block green body；
(3) steam press maintenance: it will be cut and be organized into groups after the demoulding of building block green body, and then placed it in temperature and be 190-200 DEG C, press
By force under conditions of 0.9-1.3MPa, steam-cured 8-12h obtains autoclave aerated concrete building block.
8. the preparation method of autoclave aerated concrete building block according to claim 7, it is characterised in that: in step (1)
Mixing speed is 800-1000r/min.
9. the preparation method of autoclave aerated concrete building block according to claim 7, it is characterised in that: in step (2)
Mixing speed is 2000-3000r/min.
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| CN114835429A (en) * | 2022-04-13 | 2022-08-02 | 山东泓畅建材有限公司 | Foam concrete additive |
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