CN114773083A - Concrete aerated brick with good durability and preparation method thereof - Google Patents
Concrete aerated brick with good durability and preparation method thereof Download PDFInfo
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- CN114773083A CN114773083A CN202210416015.0A CN202210416015A CN114773083A CN 114773083 A CN114773083 A CN 114773083A CN 202210416015 A CN202210416015 A CN 202210416015A CN 114773083 A CN114773083 A CN 114773083A
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- particles
- aerated brick
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- 239000011449 brick Substances 0.000 title claims abstract description 107
- 238000002360 preparation method Methods 0.000 title claims abstract description 57
- 239000012188 paraffin wax Substances 0.000 claims abstract description 110
- 239000002245 particle Substances 0.000 claims abstract description 91
- 239000000945 filler Substances 0.000 claims abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000003223 protective agent Substances 0.000 claims abstract description 27
- 239000000843 powder Substances 0.000 claims abstract description 25
- 229920001817 Agar Polymers 0.000 claims abstract description 21
- 239000008272 agar Substances 0.000 claims abstract description 21
- 241000251468 Actinopterygii Species 0.000 claims abstract description 17
- 108010010803 Gelatin Proteins 0.000 claims abstract description 17
- 239000008273 gelatin Substances 0.000 claims abstract description 17
- 229920000159 gelatin Polymers 0.000 claims abstract description 17
- 235000019322 gelatine Nutrition 0.000 claims abstract description 17
- 235000011852 gelatine desserts Nutrition 0.000 claims abstract description 17
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 11
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 11
- 239000004568 cement Substances 0.000 claims abstract description 11
- 239000004571 lime Substances 0.000 claims abstract description 11
- 239000010881 fly ash Substances 0.000 claims abstract description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000005520 cutting process Methods 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims abstract description 7
- 238000003756 stirring Methods 0.000 claims description 17
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 15
- 239000002202 Polyethylene glycol Substances 0.000 claims description 13
- 229920001223 polyethylene glycol Polymers 0.000 claims description 13
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 12
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 12
- 239000006229 carbon black Substances 0.000 claims description 10
- 229910021392 nanocarbon Inorganic materials 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 8
- 239000002002 slurry Substances 0.000 claims description 8
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 claims description 6
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 5
- 239000005543 nano-size silicon particle Substances 0.000 claims description 5
- 235000012239 silicon dioxide Nutrition 0.000 claims description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 2
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 2
- 239000000725 suspension Substances 0.000 claims description 2
- 239000011456 concrete brick Substances 0.000 claims 3
- 239000003973 paint Substances 0.000 claims 1
- 230000035699 permeability Effects 0.000 abstract description 19
- 239000002994 raw material Substances 0.000 abstract description 11
- 239000008188 pellet Substances 0.000 description 20
- 230000000052 comparative effect Effects 0.000 description 14
- 230000002195 synergetic effect Effects 0.000 description 9
- 230000003014 reinforcing effect Effects 0.000 description 5
- 239000000377 silicon dioxide Substances 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 4
- 239000004833 fish glue Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011361 granulated particle Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 101710154778 Thymidylate synthase 1 Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
Classifications
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00284—Materials permeable to liquids
-
- 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
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to the field of concrete aerated bricks, and particularly discloses a concrete aerated brick with good durability and a preparation method thereof. The concrete aerated brick comprises the following components: water; lime; cement; fly ash; aluminum powder; agar; fish gelatin powder; modified paraffin particles; the preparation method of the modified paraffin particles comprises the following steps: mixing the concrete protective agent and the nano filler particles, adding molten paraffin, and granulating after the paraffin is completely cooled and solidified to obtain modified paraffin particles; wherein the mass ratio of the paraffin, the concrete protective agent and the nano filler particles is 10:3-5: 5-7. The preparation method of the concrete aerated brick comprises the following steps: mixing raw materials, pouring, cutting, forming, maintaining and forming. The concrete aerated brick has the advantages of water permeability and durability; in addition, the preparation method of the invention also has the advantages of facilitating the components to better play the role and ensuring better performance.
Description
Technical Field
The invention relates to the field of concrete aerated bricks, in particular to a concrete aerated brick with good durability and a preparation method thereof.
Background
The concrete aerated brick is a novel wall material which is prepared by mixing, pouring, cutting and molding raw materials and curing the raw materials by high-pressure steam, and is widely applied to non-bearing wall masonry and frame structure filling at present.
Because the concrete aerated bricks are all porous light materials formed by foaming, the water permeability is good, and the concrete aerated bricks are generally used as water permeable bricks, and the concrete aerated bricks are easy to corrode the concrete aerated bricks under the condition of long-term water permeability and easily influence the durability of the concrete aerated bricks, so that the concrete aerated bricks still have room for improvement.
Disclosure of Invention
In order to better take account of the water permeability and the durability of the concrete aerated brick at the same time, the application provides the concrete aerated brick with good durability and the preparation method thereof.
The first aspect provides a concrete aerated brick that durability is good, adopts following technical scheme:
a concrete aerated brick with good durability comprises the following components in parts by weight:
60-70 parts of water;
160 portions of lime and 170 portions of lime;
cement 180-;
650 portions of fly ash and 670 portions of fly ash;
2-5kg of aluminum powder;
1-2 parts of agar;
0.1-0.5 part of fish gelatin powder;
10-15 parts of modified paraffin particles;
the preparation method of the modified paraffin particles comprises the following steps: mixing a concrete protective agent and nano filler particles to form a suspension, adding molten paraffin, uniformly stirring, cooling until the paraffin is completely solidified, and granulating the solidified paraffin to obtain modified paraffin particles;
wherein the mass ratio of the paraffin, the concrete protective agent and the nano filler particles is 10:3-5: 5-7.
The agar and the fish gelatin powder in a specific proportion are added to be compounded in a synergistic manner, so that the consistency of concrete slurry formed by the substances is improved better, the formed concrete aerated brick blank is more easily in a gel state, and the edges and corners of the concrete aerated brick blank are less prone to generating gaps during cutting; meanwhile, in the high-temperature autoclaved process of the concrete aerated brick, a part of the agar and the fish glue powder is easily dissolved into liquid and flows away, so that the agar and the fish glue powder are not easy to influence the strength performance and the heat insulation performance of the concrete aerated brick.
Meanwhile, the concrete protective agent and the nano filler particles are used as the inner core of the modified paraffin particles and the paraffin is used as the surface layer of the modified paraffin to prepare the modified paraffin particles for cooperation, so that the surface paraffin of the modified paraffin particles can be melted in the high-temperature autoclaved process of the concrete aerated brick, and the concrete protective agent and the nano filler particles are released, thereby better reinforcing and protecting the concrete aerated brick, and the porous structure of the concrete aerated brick is not easily influenced, so that the concrete aerated brick can simultaneously keep better water permeability and durability.
In addition, the melted paraffin can form holes in the concrete aerated brick, so that the porous water permeable structure of the concrete aerated brick is not easily influenced, and meanwhile, the flowing paraffin and the concrete protective agent can also form a layer of protective film on the surface of the concrete aerated brick, so that the inner wall of the formed hole is covered with a waterproof film while the porous water permeable structure of the concrete aerated brick is not easily influenced, and the durability of the concrete aerated brick is not easily influenced.
Preferably, the nano filler particles comprise one or more of nano silicon dioxide, nano calcium carbonate, nano iron oxide, nano aluminum oxide, nano titanium dioxide, nano carbon black and nano zirconium dioxide.
By adopting one or more substances as the nano filler particles, the concrete aerated brick is favorably reinforced, so that the compressive strength of the concrete aerated brick is higher.
Preferably, the nanoparticles are prepared from nano-silica, nano-titania and nano-carbon black in a weight ratio of 1: 0.3-0.5: 0.1-0.3 by mass ratio.
By adopting the synergistic compounding of the nano silicon dioxide, the nano titanium dioxide and the nano carbon black in a specific ratio, the microporous wall of the concrete aerated brick can be better filled, but the permeable hole can be easily plugged, so that the concrete aerated brick can be better reinforced, the compressive strength of the concrete aerated brick is improved, and the permeable performance of the concrete aerated brick is not easily influenced.
Preferably, the mass ratio of the paraffin to the concrete protective agent to the nano filler particles is 10:4: 5.
By further controlling the mass ratio of each component of the modified paraffin wax particles, the paraffin wax can better wrap the concrete protective agent and the nano filler particles, so that the modified paraffin wax particles can be better molded, the paraffin wax particles can better reinforce the concrete aerated brick after being melted in the high-temperature autoclaved process of the concrete aerated brick, and a protective film is formed on the surface of the concrete aerated brick, so that the compressive strength and the durability of the concrete aerated brick are better.
Preferably, the particle size of the modified paraffin particles is 1-2 mm.
By controlling the particle size of the modified paraffin particles, uniform water permeable holes can be better formed in the concrete aerated brick after the modified paraffin particles are melted in the high-temperature steaming and pressing process, so that the water permeability of the concrete aerated brick can be better improved.
Preferably, fatty alcohol-polyoxyethylene ether is added in the preparation of the modified paraffin particles, and the mass ratio of the fatty alcohol-polyoxyethylene ether to the paraffin is 1: 0.1-0.3.
By adding the fatty alcohol-polyoxyethylene ether, the permeability of the melted modified paraffin particles can be better improved, so that the concrete protective agent and the nano filler contained in the modified paraffin particles can be more easily and uniformly dispersed in the concrete aerated brick, and the reinforcing effect and the protection effect of the modified paraffin particles are better.
Preferably, polyethylene glycol powder with the molecular weight of 10000 is also added in the preparation of the modified paraffin particles, and the mass ratio of the polyethylene glycol powder to the paraffin is 1: 0.05-0.1.
By adding the polyethylene glycol with specific molecular weight, the polyethylene glycol can be melted into liquid in the high-temperature steam-pressing process, so that the film forming property of the concrete protective agent can be better improved, and the durability of the concrete aerated brick can be better improved.
In a second aspect, the application provides a preparation method of a concrete aerated brick with good durability, which adopts the following technical scheme:
a preparation method of a concrete aerated brick with good durability comprises the following steps:
step 1, adding water, lime, cement, fly ash and aluminum powder into a stirring kettle, uniformly stirring to form a concrete premixed material, then placing the concrete premixed material at 46-50 ℃ for reacting for 3-5min, adding agar, fish gelatin powder and modified paraffin particles, and uniformly stirring to form concrete slurry;
step 2, pouring the concrete slurry into a forming mold, and standing for 10-12h to form initial setting concrete;
step 3, separating the initial setting concrete from the forming die, and cutting the initial setting concrete into required specifications to form an aerated brick blank;
and 4, carrying out autoclaved curing on the aerated brick blank to obtain the concrete aerated brick with good durability.
By controlling the adding sequence of the components, the agar, the fish gelatin powder and the paraffin particles are more difficult to melt in advance due to the fact that cement and water generate hydration reaction and release heat, and the components are favorably compounded and play a role in cooperation better, so that the reinforcing effect and the protection effect of the modified paraffin particles on the concrete aerated brick are favorably improved.
In summary, the present application has the following beneficial effects:
1. the agar and the fish gelatin powder in a specific proportion are added to be compounded in a synergistic manner, so that the consistency of the upper concrete slurry is favorably improved, the corner of a concrete aerated brick blank is more difficult to have a notch when the concrete aerated brick blank is cut, and meanwhile, the agar and the fish gelatin powder are also easily dissolved into liquid and flow away in the high-temperature autoclaved process of the concrete aerated brick, so that the agar and the fish gelatin powder are more difficult to influence the strength performance and the heat preservation and heat insulation performance of the concrete aerated brick.
2. The concrete protective agent and the nano filler particles are used as the inner core of the modified paraffin particles, and the paraffin is used as the surface layer of the modified paraffin to prepare the modified paraffin particles to be matched with the agar and the fish gelatin powder in a synergistic manner, so that the concrete aerated brick is favorably reinforced and protected, the strength performance and the water permeability of the concrete aerated brick are not easily influenced by the agar and the fish gelatin powder, the porous structure of the concrete aerated brick is not easily influenced, and the concrete aerated brick can simultaneously keep better water permeability and durability.
3. By controlling the mass ratio of each component of the modified paraffin wax particles, the paraffin wax can better wrap the concrete protective agent and the nano filler particles, so that the paraffin wax particles can better reinforce the concrete aerated brick and form a protective film on the surface of the concrete aerated brick after being melted in the high-temperature autoclaved process of the concrete aerated brick, and the compressive strength and the durability of the concrete aerated brick are better.
4. By controlling the adding sequence of each component of the concrete aerated brick, the components can be better compounded in a synergistic way and can better act in a synergistic way, so that the prepared concrete can be aerated better and better water permeability and durability can be kept.
Detailed Description
The present application will be described in further detail with reference to examples and comparative examples.
The source of the raw materials for the following examples and comparative examples are detailed in table 1.
TABLE 1
Preparation example 1
The preparation example discloses a preparation method of modified paraffin particles, which comprises the following steps: adding 3kg of concrete protective agent and 5kg of nano filler particles into a stirring kettle, stirring at the rotating speed of 50r/min, uniformly stirring to form turbid liquid, then adding 10kg of molten paraffin while stirring, uniformly stirring, pouring the uniformly stirred and mixed material into a plastic barrel, cooling under natural conditions, obtaining modified paraffin after the paraffin is completely cooled and solidified, then putting the solidified modified paraffin into a granulator for granulation, and controlling the particle size of the granules to be 1mm to obtain the modified paraffin particles.
In the present preparation example, the nano-filler particles were prepared from nano-silica, nano-titania, and nano-carbon black in a ratio of 1: 0.3: 0.1 by mass ratio.
Preparation example 2
The difference from preparation example 1 is that:
the input amount of the raw materials is different and specifically as follows: 5kg of concrete protective agent; 7kg of nano filler particles; 10kg of paraffin wax.
In the present preparation example, the nano-filler particles were prepared from nano-silica, nano-titania, and nano-carbon black in a ratio of 1: 0.5: 0.3, and mixing uniformly.
The granulated particle size of this preparation example was controlled to 2 mm.
Preparation example 3
The difference from preparation example 1 is that:
the raw materials are different in input amount, and specifically the raw materials are as follows: 4kg of concrete protective agent; 5kg of nano filler particles; 10kg of paraffin wax.
In the present preparation example, the nano-filler particles were prepared from nano-silica, nano-titania, and nano-carbon black in a ratio of 1: 0.4: 0.2 by mass ratio.
The granulated particle size of this preparation example was controlled to 1.5 mm.
Preparation example 4
The difference from preparation example 3 is that: in the nano-filler particles, nano-silica is replaced by an equal amount of nano-calcium carbonate.
Preparation example 5
The difference from preparation example 3 is that: in the nano filler particles, the nano titanium dioxide is replaced by the same amount of nano calcium carbonate.
Preparation example 6
The difference from preparation example 3 is that: in the nano-filler particles, the nano-carbon black is replaced by the same amount of nano-calcium carbonate.
Preparation example 7
The difference from preparation example 3 is that: 0.1kg of fatty alcohol-polyoxyethylene ether and 0.1kg of polyethylene glycol are also added in the preparation of the modified paraffin particles, and the fatty alcohol-polyoxyethylene ether and the polyethylene glycol are synchronously mixed with the concrete protective agent and the nano filler particles.
Preparation example 8
The difference from preparation example 3 is that: 0.3kg of fatty alcohol-polyoxyethylene ether and 0.05kg of polyethylene glycol are also added in the preparation of the modified paraffin particles, and the fatty alcohol-polyoxyethylene ether and the polyethylene glycol are synchronously mixed with the concrete protective agent and the nano filler particles.
Preparation example 9
The difference from preparation example 3 is that: 0.2kg of fatty alcohol-polyoxyethylene ether and 0.1kg of polyethylene glycol are also added in the preparation of the modified paraffin particles, and the fatty alcohol-polyoxyethylene ether and the polyethylene glycol are synchronously mixed with the concrete protective agent and the nano filler particles.
Comparative preparation example 1
The difference from example 3 is that: the raw materials are different in input amount, and specifically the raw materials are as follows: 8kg of concrete protective agent; 5kg of nano filler particles; 10kg of paraffin wax.
Comparative preparation example 2
The difference from example 3 is that: the raw materials are different in input amount, and specifically the raw materials are as follows: 4kg of concrete protective agent; 8kg of nano filler particles; 10kg of paraffin wax.
Example 1
The embodiment of the application discloses a concrete aerated brick with good durability, which consists of the following components in mass:
60kg of water; 160kg of lime; 180kg of cement; 650kg of fly ash; 2kg of aluminum powder; 1kg of agar; 0.1kg of fish gelatin powder; 10kg of modified paraffin particles.
In this example, the modified paraffin particles prepared in preparation example 1 were used.
The embodiment of the application also discloses a preparation method of the concrete aerated brick with good durability, which comprises the following steps:
step 1, adding water, lime, cement, fly ash and aluminum powder into a stirring kettle according to the mass, stirring at the rotating speed of 120r/min, uniformly stirring to form a concrete premixed material, then placing the concrete premixed material at the temperature of 46 ℃ for reacting for 5min, adding agar, fish gelatin powder and modified paraffin particles, and uniformly stirring to form concrete slurry.
And 2, pouring the concrete slurry into a forming mold, conveying the forming mold into a static curing room for standing for 12 hours, and controlling the static curing time to be 55 ℃ to form the initial setting concrete.
And 3, removing the forming die to separate the initial setting concrete from the forming die, and cutting the initial setting concrete into required specifications by using a cutting machine to form an aerated brick blank.
And 4, putting the air-added brick blank into an autoclave, controlling the autoclave curing temperature to be 175 ℃, and controlling the autoclave curing time to be 6h to obtain the concrete air-added brick with good durability.
Example 2
The difference from example 1 is that:
the concrete aerated brick with good durability has different component dosage, which is as follows:
70kg of water; 170kg of lime; 200kg of cement; 670kg of fly ash; 5kg of aluminum powder; 2kg of agar; 0.5kg of fish gelatin powder; 15kg of modified paraffin particles.
The reaction temperature in step 1 was 50 ℃ and the reaction time was 3 min.
The standing time in the step 2 is 10 hours, and the standing curing temperature is 60 ℃.
Example 3
The difference from example 1 is that:
the concrete aerated brick with good durability has different component dosage, which is as follows:
65kg of water; 165kg of lime; 190kg of cement; 660kg of fly ash; 4kg of aluminum powder; 1.5kg of agar; 0.3kg of fish gelatin powder; 13kg of modified paraffin particles.
The reaction temperature in step 1 was 48 ℃ and the reaction time was 4 min.
The standing time in the step 2 is 11h, and the standing curing temperature is 58 ℃.
Example 4
The difference from example 3 is that: modified paraffin wax pellets the paraffin wax pellets prepared in preparation example 2 were used.
Example 5
The difference from example 3 is that: modified paraffin wax pellets the paraffin wax pellets prepared in preparation example 3 were used.
Example 6
The difference from example 3 is that: modified paraffin wax pellets the paraffin wax pellets prepared in preparation example 4 were used.
Example 7
The difference from example 3 is that: modified paraffin wax pellets the paraffin wax pellets prepared in preparation example 5 were used.
Example 8
The difference from example 3 is that: modified paraffin wax pellets the paraffin wax pellets prepared in preparation example 6 were used.
Example 9
The difference from example 3 is that: modified paraffin wax pellets the paraffin wax pellets prepared in preparation example 7 were used.
Example 10
The difference from example 3 is that: modified paraffin wax pellets the paraffin wax pellets prepared in preparation example 8 were used.
Example 11
The difference from example 3 is that: modified paraffin wax pellets the paraffin wax pellets prepared in preparation example 9 were used.
Comparative example 1
The difference from example 3 is that: agar, fish gelatin powder and modified paraffin particles are not added into the concrete aerated brick.
Comparative example 2
The difference from example 3 is that: modified paraffin particles are not added into the concrete aerated brick.
Comparative example 3
The difference from example 3 is that: modified paraffin wax pellets the paraffin wax pellets prepared in comparative preparation example 1 were used.
Comparative example 4
The difference from example 3 is that: modified paraffin wax pellets the paraffin wax pellets prepared in comparative preparation example 2 were used.
Experiment 1
And (4) observing and recording whether gaps appear at the corners of the concrete aerated bricks after the concrete aerated bricks of the embodiment and the comparative example are cut in the step (3).
Experiment 2
The permeability coefficient (mm/s) of the concrete aerated bricks prepared in the above examples and comparative examples was measured using A TS-A type permeable cement concrete permeability coefficient test apparatus according to the instructions of the test apparatus, and the temperature of water used for the measurement was 25 ℃. Wherein, the higher the water permeability coefficient is, the better the water permeability is.
Experiment 3
The compressive strength (MPa) of the concrete aerated brick prepared by the embodiment and the proportion is detected according to an annex A block standard compressive strength test method in GB/T4111-2013 concrete block and brick test method.
And then placing the detected concrete aerated brick in constant-temperature water at 30 ℃ for soaking for 15 days, taking out, and detecting the compressive strength (MPa) of the soaked concrete aerated brick again. Finally, calculating and recording the compression resistance change rate (%) before and after the concrete aerated brick is soaked, wherein the change rate (%) is
The data from the above experiments are detailed in table 2.
TABLE 2
According to the comparison of the data of the embodiment 3 and the comparative examples 1-2 in the table 2, the agar and the fish glue powder in a specific proportion are added to be compounded in a synergistic manner, so that the processing performance of the concrete aerated brick is favorably improved, the condition of corner notches is more difficult to appear in the cutting process of the concrete aerated brick, but the agar and the fish glue powder are easy to generate great influence on the water permeability and the strength performance of the concrete aerated brick simultaneously, the concrete aerated brick is favorably reinforced and protected by adding the modified paraffin particles in a synergistic manner, the concrete aerated brick can simultaneously have better water permeability and durability, and meanwhile, the strength performance of the concrete aerated brick is favorably improved.
According to the comparison of the data of the example 5 and the comparative examples 3-4 in the table 2, the modified paraffin particles are prepared by adopting the paraffin, the concrete protective agent and the nano filler particles in specific proportions to be cooperated with each other, so that the modified paraffin particles can better play the roles of reinforcing and protecting the concrete aerated brick. If the addition amount of the concrete protective agent is too large, the situation that the concrete protective agent is difficult to wrap by paraffin easily occurs, so that the durability of the concrete aerated brick is easily influenced; if the addition amount of the nano filler particles is too large, the situation that the water permeable holes in the concrete aerated brick are excessively blocked is easy to occur, and although the compressive strength of the concrete aerated brick is favorably improved to a certain extent, the water permeable performance of the concrete aerated brick is greatly influenced.
According to the comparison of the data of the examples 5 to 7 in the table 2, the nano filler particles are formed by compounding the nano silicon dioxide, the nano titanium dioxide and the nano carbon black in a synergistic manner according to the specific proportion, so that the concrete aerated brick is favorably reinforced, the influence on the water permeability of the concrete aerated brick is not easily caused, and the concrete aerated brick is favorably compatible with both the strength performance and the water permeability.
According to comparison of data of the embodiment 5 and the embodiment 8 in the table 2, uniform water permeable holes can be better formed in the concrete aerated brick by controlling the particle size of the modified paraffin particles, so that the water permeability of the concrete aerated brick can be better improved.
According to comparison of data of the embodiment 5 and the embodiments 9 to 11 in the table 2, the fatty alcohol-polyoxyethylene ether and the polyethylene glycol are added into the modified paraffin particles, so that the dispersibility and the film forming property of paraffin and contents in the concrete aerated brick after paraffin is melted can be better improved, the modified paraffin particles can better play a role in reinforcing and protecting the concrete aerated brick, and the strength performance and the durability of the concrete aerated brick are better.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. A concrete aerated brick with good durability is characterized in that: the paint comprises the following components in parts by mass:
60-70 parts of water;
160 portions of lime and 170 portions of lime;
180 portions of cement;
650 portions and 670 portions of fly ash;
2-5kg of aluminum powder;
1-2 parts of agar;
0.1-0.5 part of fish gelatin powder;
10-15 parts of modified paraffin particles;
the preparation method of the modified paraffin particles comprises the following steps: mixing a concrete protective agent and nano filler particles to form a suspension, adding molten paraffin, uniformly stirring, cooling until the paraffin is completely solidified, and granulating the solidified paraffin to obtain modified paraffin particles;
wherein the mass ratio of the paraffin, the concrete protective agent and the nano filler particles is 10:3-5: 5-7.
2. The aerated concrete brick with good durability of claim 1, which is characterized in that: the nano filler particles comprise one or more of nano silicon dioxide, nano calcium carbonate, nano iron oxide, nano aluminum oxide, nano titanium dioxide, nano carbon black and nano zirconium dioxide.
3. The aerated concrete brick with good durability of claim 2, wherein: the nano filler particles are prepared from nano silicon dioxide, nano titanium dioxide and nano carbon black in a proportion of 1: 0.3-0.5: 0.1-0.3, and mixing.
4. A highly durable aerated concrete block according to any one of claims 1 to 3, wherein: the mass ratio of the paraffin, the concrete protective agent and the nano filler particles is 10:4: 5.
5. The aerated concrete brick with good durability of claim 4, which is characterized in that: the particle size of the modified paraffin wax particles is 1-2 mm.
6. The aerated concrete block with good durability as claimed in any one of claims 1 to 3, wherein: fatty alcohol-polyoxyethylene ether is also added in the preparation of the modified paraffin particles, and the mass ratio of the fatty alcohol-polyoxyethylene ether to the paraffin is 1: 0.1-0.3.
7. A highly durable aerated concrete block according to any one of claims 1 to 3, wherein: polyethylene glycol powder with the molecular weight of 10000 is also added in the preparation of the modified paraffin particles, and the mass ratio of the polyethylene glycol powder to the paraffin is 1: 0.05-0.1.
8. A method for preparing a concrete aerated concrete block with good durability as claimed in any one of claims 1 to 7, wherein: the method comprises the following steps:
step 1, adding water, lime, cement, fly ash and aluminum powder into a stirring kettle, uniformly stirring to form a concrete premixed material, then placing the concrete premixed material at 46-50 ℃ for reacting for 3-5min, then adding agar, fish gelatin powder and modified paraffin particles, and uniformly stirring to form concrete slurry;
step 2, pouring the concrete slurry into a forming mold, and standing for 10-12h to form initial setting concrete;
step 3, separating the initial setting concrete from the forming die, and cutting the initial setting concrete into required specifications to form an aerated brick blank;
and 4, performing autoclaved curing on the aerated brick blank to obtain the concrete aerated brick with good durability.
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