CN108892529A - A kind of slotting formula is without being sewed with bonding aerated concrete building block - Google Patents
A kind of slotting formula is without being sewed with bonding aerated concrete building block Download PDFInfo
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- CN108892529A CN108892529A CN201810785804.5A CN201810785804A CN108892529A CN 108892529 A CN108892529 A CN 108892529A CN 201810785804 A CN201810785804 A CN 201810785804A CN 108892529 A CN108892529 A CN 108892529A
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- building block
- sewed
- aerated concrete
- concrete building
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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
- 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
- C04B28/14—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 calcium sulfate cements
- C04B28/142—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements
- C04B28/144—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being a flue gas desulfurization product
-
- 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
- C04B2111/40—Porous or lightweight materials
Abstract
The invention discloses a kind of slotting formulas without being sewed with bonding aerated concrete building block, including concrete block, groove, raised line and parameter code board, the two sides of the concrete block are provided with the groove and the raised line, the parameter code board is provided at the top of the concrete block, the length and width of the concrete block are at high proportion 5:2:1, this hair hit each component substance and its mass fraction are：70~80 parts of flyash, 30~36 parts of quartz sand, 20~25 parts of fine sand, 30~35 parts of white lime powder, 15~20 parts of quick lime powder.Beneficial effect is：1, aerated concrete building block prepared by the present invention has the advantages that surface is fine and smooth, bubble uniformity is good, bubble compactedness is high；2, aerated concrete building block prepared by the present invention may be implemented to insert formula without viscous assembly is sewed with, and assembly is flexible, piles up convenience, easy to operate, good airproof performance；3, aerated concrete building block prepared by the present invention can adjust production materials in real time according to actual needs, to adjust heat-insulated, the thermal insulation property of aerated concrete building block, use is more flexible.
Description
Technical field
The present invention relates to the field of building materials, more particularly to a kind of slotting formula without being sewed with bonding aerated concrete building block.
Background technique
Aerated concrete building block is that a kind of light porous, insulation, fire protecting performance are good, nailable, sawable, planable and have one
Determine the New Building Materials of shock resistance.Early in the '30s initial stage, China begins to produce this product, and is widely used.
Such as：During Shanghai International Hotel, Shanghai mansion, Foochow building, People's Bank of China's building contour level are built.It is a kind of excellent
New Building Materials, and have many advantages, such as environmental protection.
Aerated concrete building block can make self weight of the self weight of whole building than common brick-and-concrete buildings reduce by 40% or more.By
Mitigating in structural weight per square meter, destructive power of the earthquake is small, so the shock resistance of building is greatly improved, this this more earthquake for us
There to be very big benefit for country, thus is widely used.
Comparison application No. is：201711188678.7 Chinese patent, particular content is：A kind of air-entrained concrete building block,
It is made of basic material and auxiliary material, the weight proportion of basic material component is：50~60kg/m of cement 3, yellow sand 350~
450kg/m 3,81~83kg/m of quick lime 3,10~20kg/m of desulfurized gypsum 3,0.4~0.6kg/m of aluminium powder 3.More than
The aerated concrete building block edge of patent production is more coarse, needs additional adhesive to build a wall, can not carry out seamless plug-in type
Installation just seems in the flexible disassembly of some needs, the work of installation aerated concrete building block and is more troublesome.
Summary of the invention
The object of the invention is that providing a kind of slotting formula to solve the above-mentioned problems without being sewed with bonding aerated concrete building block.
The present invention is achieved through the following technical solutions above-mentioned purpose：
A kind of slotting formula is without being sewed with bonding aerated concrete building block, including concrete block, groove, raised line and parameter code board, the concrete
The two sides of block are provided with the groove and the raised line, are provided with the parameter code board, the coagulation at the top of the concrete block
The length and width of soil block are at high proportion 5:2:1, this hair hit each component substance and its mass fraction are：70~80 parts of flyash, quartz
30~36 parts of sand, 20~25 parts of fine sand, 30~35 parts of white lime powder, 15~20 parts of quick lime powder, desulfurized gypsum 40~45
Part, 12~15 parts of foam stabilizer, 10~12 parts of portland cement, 12~16 parts of aluminium powder, 3~6 parts of polycarboxylate water-reducer, N- acetyl-
6~12 parts of D-Val, 6~12 parts of 3- carboxyl benzaldehyde, 10~15 parts of volcano grey matter cement, 10~15 parts of high-early (strength) cement, mine
45~60 parts of slag.
Preferably, the concrete block, the groove, raised line integral sintering molding.
Preferably, the radius size of the groove and the high dimension scale of the concrete block are 5:1.
Preferably, the mass ratio of the N- acetyl-D-Val and 3- carboxyl benzaldehyde is 1:1.
Preferably, the average grain diameter of the flyash is 0.2~0.3mm, and the average particle size of the white lime powder is
0.1~0.3mm.
Preferably, the polycarboxylate water-reducer is the mixed of quaternary ammonium salt polycarboxylate water-reducer and maleic amide polycarboxylate water-reducer
Close object.
Preferably, the mass ratio of the quaternary ammonium salt polycarboxylate water-reducer and maleic amide polycarboxylate water-reducer is 1:1.
Preferably, the fineness modulus of the fine sand is 1.6~2.0, average grain diameter is 0.25~0.35mm；The quartz sand
Fineness modulus be 2.7~3.1, average grain diameter is 0.35~0.5mm.
Compared with prior art, the beneficial effects of the present invention are：1, aerated concrete building block prepared by the present invention has surface
The advantage fine and smooth, bubble uniformity is good, bubble compactedness is high；2, it is seamless that slotting formula may be implemented in aerated concrete building block prepared by the present invention
There is viscous assembly, assembly is flexible, piles up convenience, easy to operate, good airproof performance；3, aerated concrete building block prepared by the present invention can basis
Actual demand adjusts production materials in real time, to adjust heat-insulated, the thermal insulation property of aerated concrete building block, use is more flexible.
Detailed description of the invention
Fig. 1 is a kind of slotting formula of the present invention without the three-dimensional view for being sewed with bonding aerated concrete building block；
Fig. 2 is a kind of slotting formula of the present invention without the main view for being sewed with bonding aerated concrete building block；
Fig. 3 is a kind of slotting formula of the present invention without the top view for being sewed with bonding aerated concrete building block.
The reference numerals are as follows：
1, concrete block；2, groove；3, raised line；4, parameter code board.
Specific embodiment
Technical solution of the present invention is purged below, is fully described by, it is clear that described embodiment is only this hair
Bright a part of the embodiment, instead of all the embodiments.Based on the embodiment of the present invention, those of ordinary skill in the art are not having
Every other embodiment obtained under the premise of creative work is made, shall fall within the protection scope of the present invention.
Embodiment one：
As shown in Figure 1-3, a kind of slotting formula is without being sewed with bonding aerated concrete building block, including concrete block 1, groove 2, raised line 3 and parameter
Code board 4, the two sides of the concrete block 1 are provided with the groove 2 and the raised line 3, in user by inserting the formula assembly present invention
When, the groove 2 and the raised line 3 can nest together, and stablize two neighboring effect of the invention to play, improve
The present invention inserts the stability of formula assembly, reduces the amplitude rocked, to improve anti-seismic performance, sets at the top of the concrete block 1
It is equipped with the parameter code board 4, the parameter code board 4 can be used for indicating length of the invention, width and height, to facilitate use
Required parameter is selected at family, is easy to use, and the length and width of the concrete block 1 are at high proportion 5:2:1, this hair hits each component substance
And its mass fraction is：70 parts of flyash, 20 parts of fine sand, 30 parts of white lime powder, 15 parts of quick lime powder, takes off 3 parts of quartz sand
40 parts of sulphur gypsum, 12 parts of foam stabilizer, 10 parts of portland cement, aluminium powder 12, polycarboxylate water-reducer 3, N- acetyl -6 parts of D-Val,
6 parts of 3- carboxyl benzaldehyde, 10 parts of volcano grey matter cement, 10 parts of high-early (strength) cement, 45 parts of slag.
In the present embodiment, the concrete block 1, the groove 2, the molding of 3 integral sintering of the raised line.
In the present embodiment, the high dimension scale of the radius size of the groove 2 and the concrete block 1 is 5:1.
In the present embodiment, the mass ratio of the N- acetyl-D-Val and 3- carboxyl benzaldehyde is 1:1.
In the present embodiment, the average grain diameter of the flyash is 0.2mm, and the average particle size of the white lime powder is
0.1mm。
In the present embodiment, the polycarboxylate water-reducer is quaternary ammonium salt polycarboxylate water-reducer and maleic amide polycarboxylate water-reducer
Mixture.
In the present embodiment, the mass ratio of the quaternary ammonium salt polycarboxylate water-reducer and maleic amide polycarboxylate water-reducer is 1:1.
In the present embodiment, the fineness modulus of the fine sand is 1.6, average grain diameter 0.25mm；The fineness of the quartz sand
Modulus is 2.7, average grain diameter 0.35mm.
Embodiment two：
As shown in Figure 1, a kind of slotting formula is without being sewed with bonding aerated concrete building block, including concrete block 1, groove 2, raised line 3 and parameter code
Board 4, the two sides of the concrete block 1 are provided with the groove 2 and the raised line 3, when user is by inserting the formula assembly present invention,
The groove 2 and the raised line 3 can nest together, and stablize two neighboring effect of the invention to play, and improve this
The stability for inventing the formula of inserting assembly, reduces the amplitude rocked, to improve anti-seismic performance, is arranged at the top of the concrete block 1
There is the parameter code board 4, the parameter code board 4 can be used for indicating length of the invention, width and height, to facilitate user
Parameter needed for selecting is easy to use, and the length and width of the concrete block 1 are at high proportion 5:2:1, this hair hit each component substance and
Its mass fraction is：75 parts of flyash, 22 parts of fine sand, 33 parts of white lime powder, 17 parts of quick lime powder, takes off 33 parts of quartz sand
40 parts of sulphur gypsum, 12 parts of foam stabilizer, 10 parts of portland cement, 14 parts of aluminium powder, 5 parts of polycarboxylate water-reducer, N- acetyl-D-Val
8 parts, 8 parts of 3- carboxyl benzaldehyde, 12 parts of volcano grey matter cement, 12 parts of high-early (strength) cement, 50 parts of slag.
In the present embodiment, the concrete block 1, the groove 2, the molding of 3 integral sintering of the raised line.
In the present embodiment, the high dimension scale of the radius size of the groove 2 and the concrete block 1 is 5:1.
In the present embodiment, the mass ratio of the N- acetyl-D-Val and 3- carboxyl benzaldehyde is 1:1.
In the present embodiment, the average grain diameter of the flyash is 0.2mm, and the average particle size of the white lime powder is
0.15mm。
In the present embodiment, the polycarboxylate water-reducer is quaternary ammonium salt polycarboxylate water-reducer and maleic amide polycarboxylate water-reducer
Mixture.
In the present embodiment, the mass ratio of the quaternary ammonium salt polycarboxylate water-reducer and maleic amide polycarboxylate water-reducer is 1:1.
In the present embodiment, the fineness modulus of the fine sand is 1.7, average grain diameter 0.3mm；The fineness mould of the quartz sand
Number is 3, average grain diameter 0.4mm.
Embodiment three：
As shown in Figure 1-3, a kind of slotting formula is without being sewed with bonding aerated concrete building block, including concrete block 1, groove 2, raised line 3 and parameter
Code board 4, the two sides of the concrete block 1 are provided with the groove 2 and the raised line 3, in user by inserting the formula assembly present invention
When, the groove 2 and the raised line 3 can nest together, and stablize two neighboring effect of the invention to play, improve
The present invention inserts the stability of formula assembly, reduces the amplitude rocked, to improve anti-seismic performance, sets at the top of the concrete block 1
It is equipped with the parameter code board 4, the parameter code board 4 can be used for indicating length of the invention, width and height, to facilitate use
Required parameter is selected at family, is easy to use, and the length and width of the concrete block 1 are at high proportion 5:2:1, this hair hits each component substance
And its mass fraction is：77 parts of flyash, 34 parts of quartz sand, 23 parts of fine sand, 33 parts of white lime powder, 18 parts of quick lime powder,
44 parts of desulfurized gypsum, 13 parts of foam stabilizer, 11 parts of portland cement, 15 parts of aluminium powder, 4 parts of polycarboxylate water-reducer, N- acetyl-D- figured silk fabrics ammonia
Sour 7 parts, 7 parts of 3- carboxyl benzaldehyde, 14 parts of volcano grey matter cement, 14 parts of high-early (strength) cement, 58 parts of slag.
In the present embodiment, the concrete block 1, the groove 2, the molding of 3 integral sintering of the raised line.
In the present embodiment, the high dimension scale of the radius size of the groove 2 and the concrete block 1 is 5:1.
In the present embodiment, the mass ratio of the N- acetyl-D-Val and 3- carboxyl benzaldehyde is 1:1.
In the present embodiment, the average grain diameter of the flyash is 0.2mm, and the average particle size of the white lime powder is
0.1mm。
In the present embodiment, the polycarboxylate water-reducer is quaternary ammonium salt polycarboxylate water-reducer and maleic amide polycarboxylate water-reducer
Mixture.
In the present embodiment, the mass ratio of the quaternary ammonium salt polycarboxylate water-reducer and maleic amide polycarboxylate water-reducer is 1:1.
In the present embodiment, the fineness modulus of the fine sand is 1.7, average grain diameter 0.3mm；The fineness mould of the quartz sand
Number is 3, average grain diameter 0.38mm.
Example IV：
A kind of slotting formula is described mixed without being sewed with bonding aerated concrete building block, including concrete block 1, groove 2, raised line 3 and parameter code board 4
The two sides of solidifying soil block 1 are provided with the groove 2 and the raised line 3, when user is by inserting the formula assembly present invention, the groove 2
It can be nested together with the raised line 3, stablize two neighboring effect of the invention to play, improve the slotting formula dress of the present invention
The stability matched reduces the amplitude rocked, to improve anti-seismic performance, is provided with the parameter at the top of the concrete block 1
Code board 4, the parameter code board 4 can be used for indicating length of the invention, width and height, thus needed for facilitating user to select
Parameter is easy to use, and the length and width of the concrete block 1 are at high proportion 5:2:1, this hair hits each component substance and its mass fraction
For：78 parts of flyash, 35 parts of quartz sand, 24 parts of fine sand, 34 parts of white lime powder, 19 parts of quick lime powder, 44 parts of desulfurized gypsum,
14 parts of foam stabilizer, 11 parts of portland cement, 15 parts of aluminium powder, 5 parts of polycarboxylate water-reducer, N- acetyl -11 parts of D-Val, 3- carboxyl
11 parts of benzaldehyde, 10 parts of volcano grey matter cement, 10 parts of high-early (strength) cement, 45 parts of slag.
In the present embodiment, the concrete block 1, the groove 2, the molding of 3 integral sintering of the raised line.
In the present embodiment, the high dimension scale of the radius size of the groove 2 and the concrete block 1 is 5:1.
In the present embodiment, the mass ratio of the N- acetyl-D-Val and 3- carboxyl benzaldehyde is 1:1.
In the present embodiment, the average grain diameter of the flyash is 0.2~0.3mm, the average grain of the white lime powder
Degree is 0.1~0.3mm.
In the present embodiment, the polycarboxylate water-reducer is quaternary ammonium salt polycarboxylate water-reducer and maleic amide polycarboxylate water-reducer
Mixture.
In the present embodiment, the mass ratio of the quaternary ammonium salt polycarboxylate water-reducer and maleic amide polycarboxylate water-reducer is 1:1.
In the present embodiment, the fineness modulus of the fine sand is 1.7, average grain diameter 0.3mm；The fineness mould of the quartz sand
Number is 2.8, average grain diameter 0.4mm.
Embodiment five：
A kind of slotting formula is described mixed without being sewed with bonding aerated concrete building block, including concrete block 1, groove 2, raised line 3 and parameter code board 4
The two sides of solidifying soil block 1 are provided with the groove 2 and the raised line 3, when user is by inserting the formula assembly present invention, the groove 2
It can be nested together with the raised line 3, stablize two neighboring effect of the invention to play, improve the slotting formula dress of the present invention
The stability matched reduces the amplitude rocked, to improve anti-seismic performance, is provided with the parameter at the top of the concrete block 1
Code board 4, the parameter code board 4 can be used for indicating length of the invention, width and height, thus needed for facilitating user to select
Parameter is easy to use, and the length and width of the concrete block 1 are at high proportion 5:2:1, this hair hits each component substance and its mass fraction
For：80 parts of flyash, 36 parts of quartz sand, 25 parts of fine sand, 35 parts of white lime powder, 20 parts of quick lime powder, 45 parts of desulfurized gypsum,
15 parts of foam stabilizer, 12 parts of portland cement, 16 parts of aluminium powder, 6 parts of polycarboxylate water-reducer, N- acetyl -12 parts of D-Val, 3- carboxyl
12 parts of benzaldehyde, 10 parts of volcano grey matter cement, 10 parts of high-early (strength) cement, 45 parts of slag.
In the present embodiment, the concrete block 1, the groove 2, the molding of 3 integral sintering of the raised line.
In the present embodiment, the high dimension scale of the radius size of the groove 2 and the concrete block 1 is 5:1.
In the present embodiment, the mass ratio of the N- acetyl-D-Val and 3- carboxyl benzaldehyde is 1:1.
In the present embodiment, the average grain diameter of the flyash is 0.3mm, and the average particle size of the white lime powder is
0.3mm。
In the present embodiment, the polycarboxylate water-reducer is quaternary ammonium salt polycarboxylate water-reducer and maleic amide polycarboxylate water-reducer
Mixture.
In the present embodiment, the mass ratio of the quaternary ammonium salt polycarboxylate water-reducer and maleic amide polycarboxylate water-reducer is 1:1.
In the present embodiment, the fineness modulus of the fine sand is 2.0, average grain diameter 0.35mm；The fineness of the quartz sand
Modulus is 3.1, average grain diameter 0.5mm.
Embodiment six：
A kind of slotting formula is described mixed without being sewed with bonding aerated concrete building block, including concrete block 1, groove 2, raised line 3 and parameter code board 4
The two sides of solidifying soil block 1 are provided with the groove 2 and the raised line 3, when user is by inserting the formula assembly present invention, the groove 2
It can be nested together with the raised line 3, stablize two neighboring effect of the invention to play, improve the slotting formula dress of the present invention
The stability matched reduces the amplitude rocked, to improve anti-seismic performance, is provided with the parameter at the top of the concrete block 1
Code board 4, the parameter code board 4 can be used for indicating length of the invention, width and height, thus needed for facilitating user to select
Parameter is easy to use, and the length and width of the concrete block 1 are at high proportion 5:2:1, this hair hits each component substance and its mass fraction
For：79 parts of flyash, 34 parts of quartz sand, 24 parts of fine sand, 34 parts of white lime powder, 18 parts of quick lime powder, 43 parts of desulfurized gypsum,
13 parts of foam stabilizer, 11 parts of portland cement, 13 parts of aluminium powder, 5 parts of polycarboxylate water-reducer, N- acetyl -8 parts of D-Val, 3- carboxyl
8 parts of benzaldehyde, 12 parts of volcano grey matter cement, 12 parts of high-early (strength) cement, 45 parts of slag.
In the present embodiment, the concrete block 1, the groove 2, the molding of 3 integral sintering of the raised line.
In the present embodiment, the high dimension scale of the radius size of the groove 2 and the concrete block 1 is 5:1.
In the present embodiment, the mass ratio of the N- acetyl-D-Val and 3- carboxyl benzaldehyde is 1:1.
In the present embodiment, the average grain diameter of the flyash is 0.3mm, and the average particle size of the white lime powder is
0.3mm。
In the present embodiment, the polycarboxylate water-reducer is quaternary ammonium salt polycarboxylate water-reducer and maleic amide polycarboxylate water-reducer
Mixture.
In the present embodiment, the mass ratio of the quaternary ammonium salt polycarboxylate water-reducer and maleic amide polycarboxylate water-reducer is 1:1.
In the present embodiment, the fineness modulus of the fine sand is 2.0, average grain diameter 0.35mm；The fineness of the quartz sand
Modulus is 3.1, average grain diameter 0.5mm
The basic principles, main features and advantages of the invention have been shown and described above.It should be understood by those skilled in the art that
The present invention is not limited to the above embodiments, and the above embodiments and description only illustrate the principle of the present invention,
Without departing from the spirit and scope, various changes and improvements may be made to the invention, these changes and improvements are all fallen
Enter in scope of the claimed invention.The claimed scope of the invention is defined by appending claims and equivalents.
Claims (8)
1. a kind of slotting formula is without being sewed with bonding aerated concrete building block, it is characterised in that：A kind of slotting formula is wrapped without bonding aerated concrete building block is sewed with
Include concrete block（1）, groove（2）, raised line（3）With parameter code board（4）, the concrete block（1）Two sides be provided with the slot
Ditch（2）With the raised line（3）, the concrete block（1）Top is provided with the parameter code board（4）, this hair hit each component object
Matter and its mass fraction are：70~80 parts of flyash, 30~36 parts of quartz sand, 20~25 parts of fine sand, white lime powder 30~35
Part, 15~20 parts of quick lime powder, 40~45 parts of desulfurized gypsum, 12~15 parts of foam stabilizer, 10~12 parts of portland cement, aluminium powder
12~16 parts, 3~6 parts of polycarboxylate water-reducer, N- acetyl -6~12 parts of D-Val, 6~12 parts of 3- carboxyl benzaldehyde, volcanic ash
10~15 parts of matter cement, 10~15 parts of high-early (strength) cement, 45~60 parts of slag.
2. a kind of slotting formula according to claim 1 is without being sewed with bonding aerated concrete building block, it is characterised in that：The concrete block
（1）, the groove（2）, the raised line（3）Integral sintering molding.
3. a kind of slotting formula according to claim 1 is without being sewed with bonding aerated concrete building block, it is characterised in that：The groove（2）
Radius size and the concrete block high dimension scale be 5:1.
4. a kind of slotting formula according to claim 1 is without being sewed with bonding aerated concrete building block, it is characterised in that：The N- acetyl-
The mass ratio of D-Val and 3- carboxyl benzaldehyde is 1:1.
5. a kind of slotting formula according to claim 1 is without being sewed with bonding aerated concrete building block, it is characterised in that：The flyash
Average grain diameter is 0.2~0.3mm, and the average particle size of the white lime powder is 0.1~0.3mm.
6. a kind of slotting formula according to claim 1 is without being sewed with bonding aerated concrete building block, it is characterised in that：The polycarboxylic acids subtracts
Aqua is the mixture of quaternary ammonium salt polycarboxylate water-reducer and maleic amide polycarboxylate water-reducer.
7. a kind of slotting formula according to claim 6 is without being sewed with bonding aerated concrete building block, it is characterised in that：The quaternary ammonium salt is poly-
The mass ratio of carboxylic acid water reducer and maleic amide polycarboxylate water-reducer is 1:1.
8. a kind of slotting formula according to claim 1 is without being sewed with bonding aerated concrete building block, it is characterised in that：The fine sand it is thin
Degree modulus is 1.6~2.0, average grain diameter is 0.25~0.35mm；The fineness modulus of the quartz sand is 2.7~3.1, be averaged grain
Diameter is 0.35~0.5mm.
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