CN112174633A - Baking-free brick and preparation method thereof - Google Patents
Baking-free brick and preparation method thereof Download PDFInfo
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- CN112174633A CN112174633A CN202011055180.5A CN202011055180A CN112174633A CN 112174633 A CN112174633 A CN 112174633A CN 202011055180 A CN202011055180 A CN 202011055180A CN 112174633 A CN112174633 A CN 112174633A
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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
- C04B28/34—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 cold phosphate binders
- C04B28/344—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 cold phosphate binders the phosphate binder being present in the starting composition solely as one or more phosphates
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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
- C04B2111/00017—Aspects relating to the protection of the environment
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/21—Efflorescence resistance
-
- 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
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
The invention provides a baking-free brick which is prepared from the following raw materials in parts by weight: 800 portions of building residue soil and 1000 portions of building residue soil; 200 portions and 300 portions of rice field straw; 80-120 parts of cement; 22-30 parts of slaked lime; 25-35 parts of gypsum; 8-12 parts of a curing agent; 3-5 parts of an active agent; 1-3 parts of a weatherproof agent; 100 portions of water and 150 portions of water. Sodium lignosulfonate is a natural high-molecular polymer, an anionic surfactant, has strong dispersing capacity and is suitable for dispersing solids in an aqueous medium. The sodium lignosulfonate can be adsorbed on the surfaces of various solid particles and can perform metal ion exchange, sodium lignosulfonate is used as a dispersing agent and a wetting agent, a series of physical and chemical reactions are generated after the sodium lignosulfonate is mixed with a soil body, and a thin water film wrapped on the surface of each fine particle is removed, so that the engineering property of the soil body is changed, and the strength and the water resistance of the baking-free brick are effectively improved.
Description
Technical Field
The invention relates to the technical field of environment-friendly building materials, and particularly relates to a baking-free brick and a preparation method thereof.
Background
With the rapid development of cities in China, bottlenecks restricting the development of cities are increasingly remarkable while the scales of the cities are continuously enlarged. A large amount of dregs can cause many problems during standby, for example, the storage place problem of dregs, a large amount of dregs need many spaces, and the consumption point in the past is selected in suburbs, not only destroys arable land, but also has an influence on the local ecological environment. In addition, the air pollution problem is solved, and dust in the dregs enters air along with wind, so that the urban air quality is influenced. If the muck is continuously dredged by piling, burying or being used as road bed filler, the muck not only occupies a large amount of land resources, but also severely limits the development of urban economy and the sustainable development of the building industry.
Returning the straws to the field and applying the chemical fertilizer in a matching way are the most effective measures for realizing the continuous yield increase and the soil fertility improvement of the rice. However, the proportion of straw returning to the field in the rice field is less than 10%, the straw burning is common, and meanwhile, the atmospheric environment pollution is caused, and the ecological environment is seriously influenced.
Disclosure of Invention
Therefore, the present invention provides a baking-free brick and a preparation method thereof, which mainly aims to overcome the problem that the existing anti-dropping quick connector and the connecting pipe are separated from each other along with the lapse of the use time.
In order to realize the technical problem, the solution scheme adopted by the invention is as follows:
a baking-free brick is composed of the following raw materials in parts by weight:
800 portions of building residue soil and 1000 portions of building residue soil;
200 portions and 300 portions of rice field straw;
80-120 parts of cement;
22-30 parts of slaked lime;
25-35 parts of gypsum;
8-12 parts of a curing agent;
3-5 parts of an active agent;
1-3 parts of a weatherproof agent;
100 portions of water and 150 portions of water.
In a further improvement, the construction waste is waste in construction sites, and the cement is ordinary portland cement with grade number of 42.5 or 52.5.
The further improvement is that the curing agent comprises the following components, by weight, 25% of magnesium oxide, 25% of copperas, 25% of alum, 15% of aluminum sulfate and 10% of sodium phosphate, all the raw materials are dried until the surface adsorbed water content of all the raw materials is not more than 1%, and the raw materials are put into a crusher to be crushed until the particle diameter is not more than 2 mm.
In a further improvement, the active agent is sodium lignosulfonate.
The anti-weathering agent is further improved to be composed of the following components, by weight, 50% of long potash stone, 20% of calcium carbonate, 6% of attapulgite, 3% of alumina, 10% of tung oil, 4.5% of hydrogenated oil and 6.5% of sodium metaaluminate, and the preparation method comprises the following steps: putting the feldspar, the calcium carbonate, the attapulgite and the alumina into a ball mill to be crushed into mixed abrasive with the particle size of 1-1.2mm, then putting the tung oil, the hydrogenated oil and the sodium metaaluminate into a heating pot to be stirred for 20-30min at the temperature of 60-70 ℃ to prepare grease, finally pouring the mixed abrasive into the grease, putting the grease into a vacuum stirrer with the vacuum degree of-0.5﹏Stirring at 90-100 deg.C under 0.1Mpa for 30-40min to obtain the antiweathering agent.
A preparation method of a baking-free brick comprises the following steps:
s1, rice straw treatment: s11, washing and crushing the rice field straws, and sieving the rice field straws with a 40-60-mesh sieve to obtain straw powder; s12, putting the straw powder into excessive water, boiling for 5-10h, filtering to obtain supernatant, and drying the residue in the sun for later use; s13, mixing the supernatant with an alkali solution and soaking for 30-40 h; obtaining a first mixed solution; s14, performing steam explosion treatment on the first mixed solution, then filtering, and drying filter residues to obtain a pretreated substance; s15, mixing the pretreatment substance with a 3-methyl-N-butyl chloropyridine aqueous solution, and stirring for 3-10h at the temperature of 40-60 ℃; obtaining a second mixed solution; s16, concentrating and drying the second mixed solution, then washing with deionized water, and drying to obtain a cellulose extract;
s2, rolling and sieving: mixing the building residue soil, gypsum and the straw residue dried in the step S12, putting the mixture into a crusher, grinding the mixture into powdery residue, and sieving the powdery residue with a sieve to obtain mixed powder with the particle size of less than 2 mm;
s3, preparing primary slurry: adding cement, slaked lime, an active agent and a cellulose extract into the mixed powder in the step S2, then adding water, pressurizing to 2.5-3.0Mpa in a pressurizing tank, and uniformly stirring to form primary slurry of the stabilized soil particles;
s4, preparing final slurry: adding a curing agent into the step S2, and stirring and mixing to form final slurry;
s5, green brick forming: coating an anti-weathering agent on the inner die of the baking-free brick die, pouring the final slurry obtained in the step S3 into the baking-free brick die, vibrating the slurry until the slurry is compact, and compacting and forming;
s6, maintenance: and demolding after 24 hours, and watering and placing in a natural environment for curing for 7-10 days to obtain the baking-free brick.
In a further improvement, the baking-free brick mold is coated with a layer of mold release agent before the wind resistance agent is coated in the step S5.
In a further improvement, the curing in the step S6 is watering curing, and the watering curing is performed in the following manner, and water is poured onto the surface of the baking-free brick in the morning and at night each day until the surface of the baking-free brick is completely soaked.
In a further improvement, when the slurry is compacted in the step S5, a pressure of 2-2.5MPa is applied to the slurry and maintained for at least 1 min.
By adopting the technical scheme, the invention has the beneficial effects that: the baking-free brick and the preparation method thereof, the gypsum is monoclinic mineral, the main chemical component is hydrate of calcium sulfate (CaSO4), and the gypsum is added into slurry to play a role in retarding the coagulation of cement; the slaked lime is white powdery solid which is slightly soluble in water and is mainly used for softening hard water, the softened water is better combined with cement, simultaneously, the slaked lime reacts with carbon dioxide in the air to generate water and calcium carbonate during maintenance, the calcium carbonate enhances the strength of the baking-free brick, the generated water effectively maintains the baking-free brick from inside to outside to prevent the inside of the baking-free brick from being dried and cracked, and the curing agent accelerates the curing and forming of the baking-free brick,
the treated rice field straws generate cellulose, the cellulose can fully permeate into gaps inside straw residues and building residue soil under the condition of pressurized stirring, the consistency and the density of slurry are improved, the connection performance of the slurry is enhanced, the strength of a baking-free brick is improved, water molecules and ion diffusion channels are blocked, the effects of reducing the water absorption rate and improving the density of the slurry are achieved, and sodium lignosulfonate is a natural high polymer and an anionic surfactant, has strong dispersing capacity and is suitable for dispersing solids in a water medium. The invention can be adsorbed on the surface of various solid particles to perform metal ion exchange, and can generate condensation or hydrogen bond with other compounds because various active groups exist on the organization structure, sodium lignosulfonate is used as a dispersing agent and a wetting agent and is mixed with soil body to generate a series of physical and chemical reactions, a thin water film wrapped on the surface of each fine particle is removed, thereby changing the engineering property of the soil body, effectively improving the strength and the water resistance of the baking-free brick, forming a layer of anti-weathering agent on the surface of the baking-free brick, having anti-aging performance and prolonging the service life of the baking-free brick.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
a baking-free brick is composed of the following raw materials in parts by weight:
800 parts of building residue soil;
200 parts of rice field straw;
80 parts of cement;
22 parts of slaked lime;
25 parts of gypsum;
8 parts of a curing agent;
3 parts of an active agent;
1 part of a weatherproof agent;
100 parts of water.
The construction residue soil is waste residue soil of a construction site, and the cement is ordinary portland cement with the grade number of 42.5 or 52.5; the curing agent comprises the following components, by weight, 25% of magnesium oxide, 25% of copperas, 25% of alum, 15% of aluminum sulfate and 10% of sodium phosphate, all the raw materials are dried until the surface adsorbed water content of all the raw materials is not more than 1%, and the raw materials are put into a crusher to be crushed until the particle diameter is not more than 2 mm; the active agent is sodium lignosulfonate; the anti-weathering agent comprises, by weight, 50% of feldspar, 20% of calcium carbonate, 6% of attapulgite, 3% of alumina, 10% of tung oil, 4.5% of hydrogenated oil and 6.5% of sodium metaaluminate, and the preparation method comprises the following steps: putting the feldspar, the calcium carbonate, the attapulgite and the alumina into a ball mill, crushing into a mixed abrasive with the particle size of 1mm, then putting the tung oil, the hydrogenated oil and the sodium metaaluminate into a heating pot, stirring for 20min at the temperature of 60 ℃ to prepare grease, finally pouring the mixed abrasive into the grease, putting the grease into a vacuum stirrer, and stirring for 30min under the conditions that the vacuum degree is-0.5 Mpa and the temperature is 90 ℃ to obtain the anti-weathering agent.
A preparation method of a baking-free brick comprises the following steps:
s1, rice straw treatment: s11, washing and crushing the rice field straws, and sieving the rice field straws with a 40-mesh sieve to obtain straw powder; s12, putting the straw powder into excessive water, boiling for 5 hours, filtering to obtain supernatant, and drying the residue in the sun for later use; s13, mixing the supernatant with an alkali solution and soaking for 30 hours; obtaining a first mixed solution; s14, performing steam explosion treatment on the first mixed solution, then filtering, and drying filter residues to obtain a pretreated substance; s15, mixing the pretreatment substance with a 3-methyl-N-butyl chloropyridine aqueous solution, and stirring for 3 hours at the temperature of 40 ℃; obtaining a second mixed solution; s16, concentrating and drying the second mixed solution, then washing with deionized water, and drying to obtain a cellulose extract;
s2, rolling and sieving: mixing the building residue soil, gypsum and the straw residue dried in the step S12, putting the mixture into a crusher, grinding the mixture into powdery residue, and sieving the powdery residue with a sieve to obtain mixed powder with the particle size of less than 2 mm;
s3, preparing primary slurry: adding cement, slaked lime, an active agent and a cellulose extract into the mixed powder in the step S2, then adding water, pressurizing to 2.5Mpa in a pressurizing tank, and uniformly stirring to form primary slurry of stabilized soil particles;
s4, preparing final slurry: adding a curing agent into the step S2, and stirring and mixing to form final slurry;
s5, green brick forming: coating an anti-weathering agent on the inner die of the baking-free brick die, pouring the final slurry obtained in the step S3 into the baking-free brick die, vibrating the slurry until the slurry is compact, and compacting and forming;
s6, maintenance: and demolding after 24 hours, and sprinkling water to the natural environment for curing for 7 days to obtain the baking-free brick.
Step S5, before the baking-free brick mold is coated with the anti-weathering agent, a layer of release agent is coated; the step S6 is a watering maintenance, the watering maintenance is carried out in the following way, and the surface of the baking-free brick is watered once in the morning and at night every day until the surface of the baking-free brick is completely soaked; in the step S5, when the slurry is compacted, a pressure of 2MPa is applied to the slurry and the pressure is maintained for at least 1 min.
Example two:
a baking-free brick is composed of the following raw materials in parts by weight:
900 parts of building residue soil;
2500 parts of rice field straw;
100 parts of cement;
25 parts of slaked lime;
30 parts of gypsum;
10 parts of a curing agent;
4 parts of an active agent;
2 parts of a weatherproof agent;
and 125 parts of water.
The construction residue soil is waste residue soil of a construction site, and the cement is ordinary portland cement with the grade number of 42.5 or 52.5; the curing agent comprises the following components, by weight, 25% of magnesium oxide, 25% of copperas, 25% of alum, 15% of aluminum sulfate and 10% of sodium phosphate, all the raw materials are dried until the surface adsorbed water content of all the raw materials is not more than 1%, and the raw materials are put into a crusher to be crushed until the particle diameter is not more than 2 mm; the active agent is sodium lignosulfonate; the anti-weathering agent comprises, by weight, 50% of feldspar, 20% of calcium carbonate, 6% of attapulgite, 3% of alumina, 10% of tung oil, 4.5% of hydrogenated oil and 6.5% of sodium metaaluminate, and the preparation method comprises the following steps: putting the feldspar, the calcium carbonate, the attapulgite and the alumina into a ball mill, crushing into a mixed abrasive with the particle size of 1.1mm, then putting the tung oil, the hydrogenated oil and the sodium metaaluminate into a heating pot, stirring for 25min at the temperature of 65 ℃ to prepare grease, finally pouring the mixed abrasive into the grease, putting the grease into a vacuum stirrer, and stirring for 35min under the conditions that the vacuum degree is 0.02Mpa and the temperature is 95 ℃ to obtain the weather resisting agent.
A preparation method of a baking-free brick comprises the following steps:
s1, rice straw treatment: s11, washing and crushing the rice field straws, and sieving the rice field straws with a 50-mesh sieve to obtain straw powder; s12, putting the straw powder into excessive water, boiling and keeping for 7 hours, filtering to obtain supernatant, and drying the residue in the sun for later use; s13, mixing the supernatant with an alkali solution and soaking for 35 hours; obtaining a first mixed solution; s14, performing steam explosion treatment on the first mixed solution, then filtering, and drying filter residues to obtain a pretreated substance; s15, mixing the pretreatment substance with a 3-methyl-N-butyl chloropyridine aqueous solution, and stirring for 7 hours at the temperature of 50 ℃; obtaining a second mixed solution; s16, concentrating and drying the second mixed solution, then washing with deionized water, and drying to obtain a cellulose extract;
s2, rolling and sieving: mixing the building residue soil, gypsum and the straw residue dried in the step S12, putting the mixture into a crusher, grinding the mixture into powdery residue, and sieving the powdery residue with a sieve to obtain mixed powder with the particle size of less than 2 mm;
s3, preparing primary slurry: adding cement, slaked lime, an active agent and a cellulose extract into the mixed powder in the step S2, then adding water, pressurizing to 2.8Mpa in a pressurizing tank, and uniformly stirring to form primary slurry of stabilized soil particles;
s4, preparing final slurry: adding a curing agent into the step S2, and stirring and mixing to form final slurry;
s5, green brick forming: coating an anti-weathering agent on the inner die of the baking-free brick die, pouring the final slurry obtained in the step S3 into the baking-free brick die, vibrating the slurry until the slurry is compact, and compacting and forming;
s6, maintenance: and demolding after 24 hours, and sprinkling water to the natural environment for curing for 8 days to obtain the baking-free brick.
Step S5, before the baking-free brick mold is coated with the anti-weathering agent, a layer of release agent is coated; the step S6 is a watering maintenance, the watering maintenance is carried out in the following way, and the surface of the baking-free brick is watered once in the morning and at night every day until the surface of the baking-free brick is completely soaked; in the step S5, the slurry is pressed under 2.2MPa for at least 1 min.
Example three:
a baking-free brick is composed of the following raw materials in parts by weight:
1000 parts of building residue soil;
300 parts of rice field straw;
120 parts of cement;
30 parts of slaked lime;
35 parts of gypsum;
12 parts of a curing agent;
5 parts of an active agent;
3 parts of a weatherproof agent;
and 150 parts of water.
The construction residue soil is waste residue soil of a construction site, and the cement is ordinary portland cement with the grade number of 42.5 or 52.5; the curing agent comprises the following components, by weight, 25% of magnesium oxide, 25% of copperas, 25% of alum, 15% of aluminum sulfate and 10% of sodium phosphate, all the raw materials are dried until the surface adsorbed water content of all the raw materials is not more than 1%, and the raw materials are put into a crusher to be crushed until the particle diameter is not more than 2 mm; the active agent is sodium lignosulfonate; the anti-weathering agent comprises, by weight, 50% of feldspar, 20% of calcium carbonate, 6% of attapulgite, 3% of alumina, 10% of tung oil, 4.5% of hydrogenated oil and 6.5% of sodium metaaluminate, and the preparation method comprises the following steps: putting the feldspar, the calcium carbonate, the attapulgite and the alumina into a ball mill, crushing into a mixed abrasive with the particle size of 1.2mm, then putting the tung oil, the hydrogenated oil and the sodium metaaluminate into a heating pot, stirring for 30min at the temperature of 70 ℃ to prepare grease, finally pouring the mixed abrasive into the grease, putting the grease into a vacuum stirrer, and stirring for 40min under the conditions that the vacuum degree is 0.1Mpa and the temperature is 100 ℃ to obtain the weather resisting agent.
A preparation method of a baking-free brick comprises the following steps:
s1, rice straw treatment: s11, washing and crushing rice field straws, and sieving the rice field straws with a 60-mesh sieve to obtain straw powder; s12, putting the straw powder into excessive water, boiling for 10 hours, filtering to obtain supernatant, and drying the residue in the sun for later use; s13, mixing the supernatant with an alkali solution and soaking for 40 h; obtaining a first mixed solution; s14, performing steam explosion treatment on the first mixed solution, then filtering, and drying filter residues to obtain a pretreated substance; s15, mixing the pretreatment substance with a 3-methyl-N-butyl chloropyridine aqueous solution, and stirring for 10 hours at the temperature of 60 ℃; obtaining a second mixed solution; s16, concentrating and drying the second mixed solution, then washing with deionized water, and drying to obtain a cellulose extract;
s2, rolling and sieving: mixing the building residue soil, gypsum and the straw residue dried in the step S12, putting the mixture into a crusher, grinding the mixture into powdery residue, and sieving the powdery residue with a sieve to obtain mixed powder with the particle size of less than 2 mm;
s3, preparing primary slurry: adding cement, slaked lime, an active agent and a cellulose extract into the mixed powder in the step S2, then adding water, pressurizing to 3.0Mpa in a pressurizing tank, and uniformly stirring to form primary slurry of stabilized soil particles;
s4, preparing final slurry: adding a curing agent into the step S2, and stirring and mixing to form final slurry;
s5, green brick forming: coating an anti-weathering agent on the inner die of the baking-free brick die, pouring the final slurry obtained in the step S3 into the baking-free brick die, vibrating the slurry until the slurry is compact, and compacting and forming;
s6, maintenance: and demolding after 24 hours, and sprinkling water to the natural environment for curing for 10 days to obtain the baking-free brick.
Step S5, before the baking-free brick mold is coated with the anti-weathering agent, a layer of release agent is coated; the step S6 is a watering maintenance, the watering maintenance is carried out in the following way, and the surface of the baking-free brick is watered once in the morning and at night every day until the surface of the baking-free brick is completely soaked; in the step S5, the slurry is pressed at 2.5MPa for at least 1 min.
In order to embody the beneficial effects of the present invention, the following experiments were made:
two baking-free bricks of different brands commonly used in the market are selected as a comparative example 1 and a comparative example 2, and the performances of the baking-free bricks prepared in examples 1 to 3 and the baking-free bricks of the comparative examples 1 to 2 are tested to obtain the results shown in the following table 1:
TABLE 1 baking-free brick Property measurement results
As can be seen from Table 1, the baking-free brick prepared by the invention has low water absorption, strong mechanical strength and wide application prospect.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The baking-free brick is characterized by comprising the following raw materials in parts by weight:
800 portions of building residue soil and 1000 portions of building residue soil;
200 portions and 300 portions of rice field straw;
80-120 parts of cement;
22-30 parts of slaked lime;
25-35 parts of gypsum;
8-12 parts of a curing agent;
3-5 parts of an active agent;
1-3 parts of a weatherproof agent;
100 portions of water and 150 portions of water.
2. The baking-free brick of claim 1, wherein: the construction residue soil is waste residue soil of a construction site, and the cement is ordinary Portland cement with the grade number of 42.5 or 52.5.
3. The baking-free brick of claim 1, wherein: the curing agent comprises, by weight, 25% of magnesium oxide, 25% of copperas, 25% of alum, 15% of aluminum sulfate and 10% of sodium phosphate, wherein the raw materials are dried until the surface adsorbed water content of the raw materials is not more than 1%, and the raw materials are put into a crusher to be crushed until the particle diameter is not more than 2 mm.
4. The baking-free brick of claim 1, wherein: the active agent is sodium lignosulfonate.
5. The baking-free brick of claim 4, wherein: the anti-weathering agent comprises, by weight, 50% of feldspar, 20% of calcium carbonate, 6% of attapulgite, 3% of alumina, 10% of tung oil, 4.5% of hydrogenated oil and 6.5% of sodium metaaluminate, and the preparation method comprises the following steps: putting the feldspar, the calcium carbonate, the attapulgite and the alumina into a ball mill to be crushed into mixed abrasive with the particle size of 1-1.2mm, then putting the tung oil, the hydrogenated oil and the sodium metaaluminate into a heating pot to be stirred for 20-30min at the temperature of 60-70 ℃ to prepare grease, finally pouring the mixed abrasive into the grease, putting the grease into a vacuum stirrer with the vacuum degree of-0.5﹏Stirring at 90-100 deg.C under 0.1Mpa for 30-40min to obtain the antiweathering agent.
6. The preparation method of the baking-free brick is characterized by comprising the following steps:
s1, rice straw treatment: s11, washing and crushing the rice field straws, and sieving the rice field straws with a 40-60-mesh sieve to obtain straw powder; s12, putting the straw powder into excessive water, boiling for 5-10h, filtering to obtain supernatant, and drying the residue in the sun for later use; s13, mixing the supernatant with an alkali solution and soaking for 30-40 h; obtaining a first mixed solution; s14, performing steam explosion treatment on the first mixed solution, then filtering, and drying filter residues to obtain a pretreated substance; s15, mixing the pretreatment substance with a 3-methyl-N-butyl chloropyridine aqueous solution, and stirring for 3-10h at the temperature of 40-60 ℃; obtaining a second mixed solution; s16, concentrating and drying the second mixed solution, then washing with deionized water, and drying to obtain a cellulose extract;
s2, rolling and sieving: mixing the building residue soil, gypsum and the straw residue dried in the step S12, putting the mixture into a crusher, grinding the mixture into powdery residue, and sieving the powdery residue with a sieve to obtain mixed powder with the particle size of less than 2 mm;
s3, preparing primary slurry: adding cement, slaked lime, an active agent and a cellulose extract into the mixed powder in the step S2, then adding water, pressurizing to 2.5-3.0Mpa in a pressurizing tank, and uniformly stirring to form primary slurry of the stabilized soil particles;
s4, preparing final slurry: adding a curing agent into the step S2, and stirring and mixing to form final slurry;
s5, green brick forming: coating an anti-weathering agent on the inner die of the baking-free brick die, pouring the final slurry obtained in the step S3 into the baking-free brick die, vibrating the slurry until the slurry is compact, and compacting and forming;
s6, maintenance: and demolding after 24 hours, and watering and placing in a natural environment for curing for 7-10 days to obtain the baking-free brick.
7. The method for preparing baking-free bricks according to claim 6, characterized in that: in the step S5, the baking-free brick mold is coated with a layer of release agent before being coated with the anti-weathering agent.
8. The method for preparing baking-free bricks according to claim 6, characterized in that: and the step S6, namely watering and maintaining, wherein the watering and maintaining are carried out in the following way, and water is poured on the surface of the baking-free brick in the morning and at night every day until the surface of the baking-free brick is completely soaked.
9. The method for preparing baking-free bricks according to claim 6, characterized in that: in the step S5, when the slurry is compacted, a pressure of 2-2.5MPa is applied and maintained for at least 1 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011055180.5A CN112174633A (en) | 2020-09-29 | 2020-09-29 | Baking-free brick and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113231442A (en) * | 2021-05-08 | 2021-08-10 | 南宁市城乡规划设计研究院有限公司 | Aluminum tailing slag improvement method based on ion exchange and crosslinking reaction |
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| CN105461263A (en) * | 2015-11-18 | 2016-04-06 | 盐城工学院 | An unfired brick and a preparing method thereof |
| CN108559405A (en) * | 2018-05-16 | 2018-09-21 | 唐世群 | A kind of preparation method of weathering resistance vehicle polishing cream |
| CN108660836A (en) * | 2018-05-18 | 2018-10-16 | 通化县兴隆中药材专业合作社 | A method of extracting cellulose using stalk |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105461263A (en) * | 2015-11-18 | 2016-04-06 | 盐城工学院 | An unfired brick and a preparing method thereof |
| CN108559405A (en) * | 2018-05-16 | 2018-09-21 | 唐世群 | A kind of preparation method of weathering resistance vehicle polishing cream |
| CN108660836A (en) * | 2018-05-18 | 2018-10-16 | 通化县兴隆中药材专业合作社 | A method of extracting cellulose using stalk |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113231442A (en) * | 2021-05-08 | 2021-08-10 | 南宁市城乡规划设计研究院有限公司 | Aluminum tailing slag improvement method based on ion exchange and crosslinking reaction |
| CN113231442B (en) * | 2021-05-08 | 2022-05-24 | 南宁市城乡规划设计研究院有限公司 | Aluminum tailing slag improvement method based on ion exchange and crosslinking reaction |
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Application publication date: 20210105 |