CN115321911B - Artificial granite waste powder autoclaved aerated concrete block and preparation method thereof - Google Patents
Artificial granite waste powder autoclaved aerated concrete block and preparation method thereof Download PDFInfo
- Publication number
- CN115321911B CN115321911B CN202210985855.9A CN202210985855A CN115321911B CN 115321911 B CN115321911 B CN 115321911B CN 202210985855 A CN202210985855 A CN 202210985855A CN 115321911 B CN115321911 B CN 115321911B
- Authority
- CN
- China
- Prior art keywords
- microwave
- waste powder
- artificial granite
- powder
- granite waste
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/16—Waste materials; Refuse from building or ceramic industry
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/02—Selection of the hardening environment
- C04B40/0204—Selection of the hardening environment making use of electric or wave energy or particle radiation
- C04B40/0213—Electromagnetic waves
- C04B40/0218—Microwaves
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/02—Selection of the hardening environment
- C04B40/0263—Hardening promoted by a rise in temperature
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
-
- 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)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Civil Engineering (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Environmental & Geological Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses an artificial granite waste powder autoclaved-free aerated concrete block which comprises dry materials and water, wherein the weight ratio of the water to the dry materials is 0.38-0.48, and the dry materials comprise the following raw material components in parts by weight: 30 to 35.5 parts of cement, 14.6 to 49.6 parts of sand, 5 to 35 parts of artificial granite waste powder, 8 to 11.3 parts of quicklime powder, 2.8 to 3.54 parts of gypsum, 0.11 to 0.16 part of aluminum paste and 0.01 to 0.05 part of additive. The preparation method of the concrete block comprises the steps of uniformly stirring cement, sand, artificial granite waste powder, quicklime powder, gypsum, an additive and part of water, mixing the rest of water and aluminum powder paste, adding the mixture into the mixture, uniformly stirring, pouring the mixture into a mould, and placing the mould into a microwave curing box for intermittent microwave heating and curing to obtain the concrete block. According to the invention, the performance of the aerated concrete block is improved by adding the artificial granite waste powder, and the aerated concrete is prepared by adopting a microwave curing process, so that not only is the energy consumption greatly reduced, but also the problem that the quality of the aerated concrete is affected due to low curing speed and uneven heating is solved.
Description
Technical Field
The invention belongs to the technical field of concrete, and particularly relates to an artificial granite waste powder autoclaved aerated concrete block and a preparation method thereof.
Background
The aerated concrete has the excellent performances of light weight, heat preservation, earthquake resistance, fire resistance and the like, and is widely applied as a novel building energy-saving wall body. At present, in engineering, the main production mode of the aerated concrete is to adopt an autoclave for high-temperature high-pressure maintenance, the product performance is stable, but the energy consumption is still higher, and the requirements of energy conservation and emission reduction are difficult to meet. The aerated concrete can be added with a certain proportion of waste residues, but the most commonly used fly ash, gypsum, lime and the like have low compressive strength and flexural strength, high water absorption rate, long-time autoclaved curing is usually required, and curing is required under the conditions of high pressure and high temperature to shorten the curing time, so that the energy consumption cost is greatly increased.
The waste powder of artificial granite is mainly the powder produced by sawing and polishing the waste stone blocks, which is obtained by filtering slurry and drying, contains a certain amount of unsaturated polyester resin besides calcium carbonate, and most of the waste powder of artificial granite industry has few utilization ways and low efficiency except that a part of waste stone powder can be reused to prepare the artificial granite products. The waste powder occupies land resources, pollutes soil and water sources, has serious influence on environment and prevents the development of local marble industry. Although a large amount of calcium carbonate component contained in the artificial granite waste powder can be used as an additive of concrete, many problems exist when the artificial granite waste is applied to aerated concrete, and the aerated concrete needs to be subjected to a gas generating process to obtain a mixture containing a large amount of uniform and fine pores, and unsaturated polyester resin in the artificial granite waste has influence on the gas generating process, so that the curing speed is slowed down, the heating uniformity is ensured, and the quality of the aerated concrete is influenced because bubbles generated by gas generation are broken and foam is killed easily due to uneven heating.
Disclosure of Invention
Aiming at the defects, the invention discloses an artificial granite waste powder autoclaved-free aerated concrete block and a preparation method thereof, wherein the performance of the aerated concrete block is improved by adding the artificial granite waste powder, and the problems that the curing speed is low, and the quality of the aerated concrete is affected due to uneven heating are solved by matching with a proper microwave curing process.
The invention is realized by adopting the following technical scheme:
the autoclaved aerated concrete block comprises dry materials and water, wherein the weight ratio of the water to the dry materials is 0.38-0.48, and the dry materials comprise the following raw material components in parts by weight: 30 to 35.5 parts of cement, 14.6 to 49.6 parts of sand, 5 to 35 parts of artificial granite waste powder, 8 to 11.3 parts of quicklime powder, 2.8 to 3.54 parts of gypsum, 0.11 to 0.16 part of aluminum powder paste and 0.01 to 0.05 part of additive; the additive is any one or a combination of a plurality of sodium dodecyl benzene sulfonate, sodium dodecyl sulfate, triethanolamine, anhydrous sodium sulfate and anhydrous sodium carbonate; the waste powder of the artificial granite is obtained by press filtration and drying in the production process of the organic artificial stone or the inorganic artificial stone, and the fineness of the waste powder of the artificial stone is 10-80 mu m.
The present invention is useful for improving the performance of aerated concrete by adding artificial granite waste powder, since the artificial granite waste powder has the following properties as compared with other industrial waste powdersThe fineness is similar to that of cement, the specific surface area is large, the specific gravity is relatively low, and the like, and the cement has certain advantages when being used as a fine admixture required by aerated concrete. For example, the artificial granite waste powder whose main component is calcium carbonate is added into concrete in a certain proportion, so that it has the advantages of raising strength of concrete product, accelerating hydration reaction and raising workability, etc., and in the course of hydration it can be C-H-S and Ca (OH) produced by cement hydration 2 And nucleation sites are provided, so that the bonding between the micro aggregate and the cement hydration particles is facilitated, the structure is compact, and the drying shrinkage is reduced.
Further, the cement is Portland cement numbered P.O 42.5 or P.O 52.5.5; the sand is any one or a combination of a plurality of dry river sand, pure quartz sand and machine-made sand, and the fineness of the sand is more than 100 meshes.
Further, the D50 of the artificial granite waste powder is 15-25 mu m, the artificial granite waste powder is modified artificial granite waste powder subjected to pretreatment, the D50 of the modified artificial granite waste powder is 15-25 mu m, the artificial granite waste powder is prepared by uniformly stirring and mixing the artificial granite waste powder, sodium vinylsulfonate, sodium bisulfate, ammonium persulfate and water, then continuing stirring and reacting for 1-2 h at 50-60 ℃, performing suction filtration to obtain a precipitate, and drying the precipitate to obtain the modified artificial granite waste powder.
According to the invention, the unsaturated polyester resin in the artificial granite waste powder is fully utilized by mixing the artificial granite waste powder with the vinyl sodium sulfonate and the like, so that the unsaturated polyester resin is subjected to crosslinking reaction with the vinyl sodium sulfonate under the action of sodium bisulfate and ammonium persulfate, the viscosity of slurry can be improved, the fluidity of foam can be reduced, the foam stabilizing effect can be achieved, and the strength of concrete can be improved.
Further, the gypsum is any one or two of the desulfurized gypsum or the natural gypsum of the tobacco plant, and the fineness of the gypsum is 100-300 meshes.
Further, the quicklime powder is the quicklime powder which is ground after underburned or normal burned, the content of effective calcium oxide in the quicklime is more than 70%, and the fineness of the quicklime is 100-300 meshes; the content of active aluminum in the aluminum powder paste is more than 90%, and the fineness of the aluminum powder paste is 100-300 meshes.
The preparation method of the artificial granite waste powder autoclaved aerated concrete block comprises the following steps:
(1) Weighing raw materials of each component according to a formula, mixing cement, sand, artificial granite waste powder, quicklime powder, gypsum and an additive, and stirring for 3-5 min at a speed of 500-1500 r/min to obtain a premix;
(2) Adding water of four fifths into the premix obtained in the step (1), and stirring for 5-7 min under the condition of 4000-6000 r/min to obtain slurry;
(3) Mixing the rest water and aluminum powder paste uniformly, adding the mixture into the slurry obtained in the step (2), stirring for 1-2 min at the speed of 4000-6000 r/min, pouring the slurry into a mould, and then placing the mould into a microwave curing box for intermittent microwave heating curing, wherein the intermittent microwave heating curing is to start microwave heating once every 5-15 min, each time of microwave heating lasts for 1-4 min, the temperature of the intermittent microwave heating curing is controlled to be 50-75 ℃, microwaves with the power of 100-500W and the frequency of 400-6000 MHz are adopted, the time of the intermittent microwave heating curing is 1-3 h, and demoulding is carried out after the intermittent microwave heating curing is finished, so that the concrete block can be obtained.
The autoclaved aerated concrete is usually used for high-temperature and high-pressure curing of samples, so that the product performance is stable, but the energy consumption is higher for a long time, the autoclaved aerated concrete can better meet the energy consumption requirement, but the traditional autoclaved aerated concrete can meet the use strength after being cured for 28 days due to the fact that the heat transfer process is slower, the heating is not uniform enough and the like, and the strength development of the product is slower, and the use strength can be met generally. In addition, fly ash, tailings, carbide slag, slag and the like are generally used as admixtures for aerated concrete, the admixtures are usually required to be pretreated to excite the activity of the admixtures, and the admixtures are generally in the aerated concrete without autoclaved treatment, so that the product performance is easy to be unstable, the compression resistance and the flexural strength are lower, the shrinkage is large, and the admixtures are difficult to be applied to actual production, so that most of the construction at present still adopts a high-temperature and high-pressure autoclaved maintenance mode.
The invention uses the artificial granite waste powder as the admixture to replace cement or sand to be added into the aerated concrete, and adopts an intermittent microwave heating maintenance mode to carry out maintenance, the product is heated by intermittently starting microwaves, and the product is heated by utilizing microwave radiation, so that the product is heated uniformly.
Further, the slurry obtained in the step (2) has a spread of about 200 to 350mm.
Further, in the step (3), the rest water and aluminum powder paste are taken and mixed uniformly, then the mixture is added into the slurry obtained in the step (2), stirring is carried out for 1-2 min under the condition of 4000-6000 r/min, then the mixture is heated to 40-45 ℃, the slurry is poured into a mould, and then the mould is placed into a microwave curing box for intermittent microwave heating curing.
Further, in the step (3), the intermittent microwave heating curing is sequentially divided into two steps of microwave foaming and microwave curing, wherein the temperature of the microwave foaming step is controlled to be 50-60 ℃, the power of the microwave is 100-250W, the time is controlled to be 25-30 min, the temperature of the microwave curing step is controlled to be 65-75 ℃, the power of the microwave is 250-500W, and the time is controlled to be 30-150 min. The two-step curing method is adopted, firstly, the first step is foaming, the foaming time can be shortened, the temperature can be regulated and controlled at the stage, the proper foaming state is achieved, and then the subsequent temperature rising curing is carried out.
Further, in the step (3), a static microwave treatment or a mobile microwave treatment method is adopted for foaming in the microwave foaming step, wherein the mobile microwave treatment is material rotation type microwave treatment or conveyor belt type microwave treatment in a mould, the material rotation speed of the rotation type microwave treatment is 60-120 rpm/min, and the material conveying speed of the conveyor belt type microwave treatment is 0.05-0.1 m/s; the microwave curing step adopts a static microwave treatment or mobile microwave treatment method to foam, the mobile microwave treatment is material rotary microwave treatment or conveyor belt type microwave treatment in a mould, the material rotating speed of the rotary microwave treatment is 30-60 rpm/min, and the material conveying speed of the conveyor belt type microwave treatment is 0.01-0.05 m/s.
After pouring the slurry into the mould in the step (3), a protective cover for heat preservation and moisture preservation can be sleeved on the outer side of the mould, so that the temperature loss and the cracking caused by water loss of the sample in the curing process are avoided, and then the slurry is immediately placed into a microwave curing box for intermittent microwave heating curing, and the gas generating process and the curing process of the sample are realized in the microwave curing box in the whole process.
Compared with the prior art, the technical scheme has the following beneficial effects:
1. the invention provides a formula of an artificial granite waste powder aerated concrete block and a non-autoclaved curing method thereof, wherein the formula can prepare the aerated concrete block with lower density than sand aerated concrete by adding the artificial granite waste powder, and the product has higher strength, small shrinkage and stable performance. The autoclaved curing is carried out by utilizing microwaves, so that the aerated concrete block can be rapidly cured, and the strength increasing speed is improved.
2. According to the invention, the artificial granite waste powder is used as a fine admixture to replace part of cement and sand as raw materials of the autoclaved aerated concrete block, on one hand, the fineness of the autoclaved aerated concrete block is generally similar to that of the cement powder, and the autoclaved aerated concrete block can be used as a raw material of the autoclaved aerated concrete without any pretreatment. On the other hand, because the specific gravity of the mortar is lower than that of cement and sand, the hydration nucleation of a cementing material can be promoted, and the like, the mortar can reduce the dry density of a sample, increase the strength of a product, and can be used as a micro aggregate to strengthen the adhesion between frameworks in a porous structure, so that the framework structure is more compact, the water absorption rate is small, and the dryness is reduced. By adopting the method, the mixing amount of the artificial granite waste powder in the aerated concrete can reach 35 percent, thereby effectively utilizing the production waste of the artificial stone industry, reducing the environmental pollution, reducing the consumption of cement and sand and saving the production cost.
3. According to the invention, the performance of the aerated concrete block is improved by adding the artificial granite waste powder, the aerated concrete is prepared by adopting a microwave curing process, the autoclaved curing in the prior art is replaced, the microwave power is low, the energy consumption is greatly reduced, the microwave curing is in place, the process flow is simple, the equipment investment is small, the production cost can be greatly reduced, the problems that the curing speed is low, the aerated concrete quality is affected due to uneven heating are solved, the curing time of the autoclaved aerated concrete is shortened to 3 days from the conventional 28 days, the product is uniform and stable and has no cracking, the dry density grade of a sample can reach B05, and the compressive strength grade can reach A3.5.
Detailed Description
The invention is further illustrated by the following examples, which are not intended to be limiting. The specific experimental conditions and methods not specified in the following examples are generally conventional means well known to those skilled in the art.
Example 1:
the autoclaved aerated concrete block comprises a dry material and water, wherein the weight ratio of the water to the dry material is 0.40, and the dry material comprises the following raw material components in parts by weight: 31.5 parts of cement, 29.6 parts of sand, 18 parts of artificial granite waste powder, 9.5 parts of quicklime powder, 3.1 parts of gypsum, 0.12 part of aluminum paste and 0.02 part of additive; the additive is a combination of sodium dodecyl benzene sulfonate, triethanolamine and anhydrous sodium carbonate; the waste powder of the artificial granite is obtained by press filtration and drying in the production process of the organic artificial stone, and the fineness of the waste powder of the artificial granite is 50 mu m; the cement is Portland cement with the number P.O and 42.5; the sand is dried river sand, and the fineness of the sand is 100 meshes; the D50 of the artificial granite waste powder is 20 mu m; the gypsum is desulfurization gypsum of a tobacco plant, and the fineness of the gypsum is 200 meshes; the quick lime powder is medium-speed ash, the digestion time is 10min after water is added, the digestion temperature is 75 ℃, the content of effective calcium oxide in the quick lime is 80%, and the fineness of the quick lime is 200 meshes; the content of active aluminum in the aluminum powder paste is 93%, and the fineness of the aluminum powder paste is 200 meshes.
The preparation method of the artificial granite waste powder autoclaved-free aerated concrete block comprises the following steps:
(1) Weighing raw materials of each component according to a formula, mixing cement, sand, artificial granite waste powder, quicklime powder, gypsum and an additive, and stirring for 4min at a speed of 800r/min to obtain a premix;
(2) Adding water of four fifths into the premix obtained in the step (1), and stirring for 6min at the speed of 4500r/min to obtain slurry, wherein the expansion degree of the slurry is about 270mm;
(3) Mixing the rest water and aluminum powder paste uniformly, adding the mixture into the slurry obtained in the step (2), stirring for 1min at the speed of 4500r/min, pouring the slurry into a mold, adding a heat-preserving and moisture-preserving cover with the feeding height of 68% of the height of the mold, preventing water vapor from being dispersed, immediately placing the mold into a microwave curing box for intermittent microwave heating curing, wherein the intermittent microwave heating curing is to start microwave heating once every 8min, each time of microwave heating lasts for 2min, the temperature of the intermittent microwave heating curing is controlled to 58 ℃, the power is 150W, the frequency is 915MHz, the time of the intermittent microwave heating curing is 1.5h, and demoulding after the intermittent microwave heating curing is finished, so that the concrete block can be obtained.
Example 2:
the autoclaved aerated concrete block comprises a dry material and water, wherein the weight ratio of the water to the dry material is 0.46, and the dry material comprises the following raw material components in parts by weight: 34 parts of cement, 40.8 parts of sand, 29 parts of artificial granite waste powder, 10.5 parts of quicklime powder, 3.35 parts of gypsum, 0.15 part of aluminum paste and 0.045 part of additive; the additive is a combination of sodium dodecyl sulfate, triethanolamine and anhydrous sodium sulfate; the artificial granite waste powder is waste powder obtained by filter pressing and drying in the production process of inorganic artificial granite, and the fineness of the artificial granite waste powder is 60 mu m; the cement is Portland cement with the number P.O and 52.5; the sand is pure quartz sand, and the fineness of the sand is 120 meshes; the D50 of the artificial granite waste powder is 20 mu m; the gypsum is natural gypsum, and the fineness of the gypsum is 200 meshes; the quick lime powder is medium-speed ash, the digestion time after adding water is 15min, the digestion temperature is 70 ℃, the content of effective calcium oxide in the quick lime is 85%, and the fineness of the quick lime is 200 meshes; the content of active aluminum in the aluminum powder paste is 92%, and the fineness of the aluminum powder paste is 200 meshes.
The preparation method of the artificial granite waste powder autoclaved-free aerated concrete block comprises the following steps:
(1) Weighing raw materials of each component according to a formula, mixing cement, sand, artificial granite waste powder, quicklime powder, gypsum and an additive, and stirring for 3.5min at the speed of 1200r/min to obtain a premix;
(2) Adding water of four fifths into the premix obtained in the step (1), and stirring for 5.5min at the speed of 5500r/min to obtain slurry, wherein the expansion degree of the slurry is about 280mm;
(3) Mixing the rest water and aluminum powder paste uniformly, adding the mixture into the slurry obtained in the step (2), stirring for 1min at the speed of 5500r/min, pouring the slurry into a mold, adding a heat-preserving and moisture-preserving cover with the feeding height of 63% of the height of the mold, preventing water vapor from being dispersed, immediately placing the mold in a microwave curing box, and performing intermittent microwave heating curing, wherein the intermittent microwave heating curing is to start microwave heating once every 10min, each time of microwave heating lasts for 3min, the temperature of the intermittent microwave heating curing is controlled to be 62 ℃, the power is 250W, the frequency is 2450MHz, the time of the intermittent microwave heating curing is 1h, the temperature of the microwave foaming step is controlled to be 50 ℃, the power of the microwave is 100W, the time is controlled to be 30min, the temperature of the microwave curing step is controlled to be 75 ℃, the power of the microwave is 500W, and the time is controlled to be 30min; the microwave foaming step adopts a movable microwave treatment method to foam, wherein the movable microwave treatment is material rotary microwave treatment in a mould, and the material rotation speed of the rotary microwave treatment is 90rpm/min; the microwave curing step adopts a movable microwave treatment method to foam, wherein the movable microwave treatment is material rotary microwave treatment in a mould, and the material rotation speed of the rotary microwave treatment is 30rpm/min; and after the intermittent microwave heating curing is finished, demoulding to obtain the concrete block.
Example 3:
the autoclaved aerated concrete block comprises a dry material and water, wherein the weight ratio of the water to the dry material is 0.45, and the dry material comprises the following raw material components in parts by weight: 30.4 parts of cement, 19.6 parts of sand, 35 parts of artificial granite waste powder, 11.3 parts of quicklime powder, 3.54 parts of gypsum, 0.16 part of aluminum paste and 0.04 part of additive; the additive is a combination of sodium dodecyl benzene sulfonate, triethanolamine, anhydrous sodium sulfate and anhydrous sodium carbonate; the waste powder of the artificial granite is obtained by press filtration and drying in the production process of the organic artificial stone, and the fineness of the waste powder of the artificial granite is 30 mu m; the cement is Portland cement with the number P.O and 42.5; the sand is a combination of dried river sand and pure quartz sand, and the fineness of the sand is 80 meshes; the D50 of the artificial granite waste powder is 20 mu m, the artificial granite waste powder is modified artificial granite waste powder subjected to pretreatment, the artificial granite waste powder is prepared by uniformly stirring and mixing the artificial granite waste powder, sodium vinylsulfonate, sodium bisulfate, ammonium persulfate and water, then continuing to stir and react for 1.5 hours at 55 ℃, performing suction filtration to obtain a precipitate, and drying the precipitate to obtain the modified artificial granite waste powder; the gypsum is a combination of desulfurization gypsum and natural gypsum of a tobacco plant, and the fineness of the gypsum is 200 meshes; the quicklime powder is quicklime powder which is ground after being underburned, the content of effective calcium oxide in the quicklime is 85%, and the fineness of the quicklime is 200 meshes; the content of active aluminum in the aluminum powder paste is 95%, and the fineness of the aluminum powder paste is 200 meshes.
The preparation method of the artificial granite waste powder autoclaved-free aerated concrete block comprises the following steps:
(1) Weighing raw materials of each component according to a formula, mixing cement, sand, artificial granite waste powder, quicklime powder, gypsum and an additive, and stirring for 5min at a speed of 1000r/min to obtain a premix;
(2) Adding water of four fifths into the premix obtained in the step (1), and stirring for 7min at a speed of 5000r/min to obtain slurry, wherein the expansion degree of the slurry is about 270mm;
(3) Uniformly mixing the rest water and aluminum powder paste, adding the mixture into the slurry obtained in the step (2), stirring for 1min at the speed of 5000r/min, then pouring the slurry into a mold after heating to 41 ℃, lightly vibrating the mold to flatten the slurry, adding a heat-preserving and moisture-preserving cover outside the mold to prevent water vapor from being dispersed, and then immediately placing the mold into a microwave curing box for intermittent microwave heating curing, wherein the intermittent microwave heating curing is to start microwave heating once every 10min, each microwave heating lasts for 2min, and the time of intermittent microwave heating curing is 2h; the intermittent microwave heating maintenance is sequentially divided into two steps of microwave foaming and microwave curing, wherein the temperature of the microwave foaming step is controlled to be 55 ℃, the microwave frequency is 915MHz, the power of the microwave is 200W, the time is controlled to be 26min, the temperature of the microwave curing step is controlled to be 70 ℃, the power of the microwave is 400W, and the time is controlled to be 94min; the microwave foaming step adopts a movable microwave treatment method to foam, wherein the movable microwave treatment is material conveying belt type microwave treatment in a mould, and the material conveying speed of the conveying belt type microwave treatment is 0.1m/s; and foaming is carried out in the microwave curing step by adopting a movable microwave treatment method, wherein the movable microwave treatment is material conveying belt type microwave treatment in a mould, and the material conveying speed of the conveying belt type microwave treatment is 0.02m/s.
Example 4:
the autoclaved aerated concrete block comprises a dry material and water, wherein the weight ratio of the water to the dry material is 0.38, and the dry material comprises the following raw material components in parts by weight: 30 parts of cement, 14.6 parts of sand, 5 parts of artificial granite waste powder, 8 parts of quicklime powder, 2.8 parts of gypsum, 0.11 part of aluminum powder paste and 0.01 part of additive; the additive is a combination of sodium dodecyl sulfate, triethanolamine and anhydrous sodium carbonate; the artificial granite waste powder is waste powder obtained by filter pressing and drying in the production process of inorganic artificial granite, and the fineness of the artificial granite waste powder is 10 mu m; the cement is Portland cement with the number P.O and 52.5; the sand is a combination of dried river sand, pure quartz sand and machine-made sand, and the fineness of the sand is 100 meshes; the D50 of the artificial granite waste powder is 15 mu m, the artificial granite waste powder is modified artificial granite waste powder subjected to pretreatment, and the preparation method of the artificial granite waste powder comprises the steps of uniformly stirring and mixing the artificial granite waste powder, sodium vinylsulfonate, sodium bisulfate, ammonium persulfate and water, then continuing to stir and react for 2 hours at 50 ℃, carrying out suction filtration to obtain a precipitate, and drying the precipitate to obtain the modified artificial granite waste powder; the gypsum is natural gypsum, and the fineness of the gypsum is 100 meshes; the quicklime powder is ground quicklime powder after normal firing, the content of effective calcium oxide in the quicklime is 70%, and the fineness of the quicklime is 100 meshes; the content of active aluminum in the aluminum powder paste is 90%, and the fineness of the aluminum powder paste is 100 meshes.
The preparation method of the artificial granite waste powder autoclaved-free aerated concrete block comprises the following steps:
(1) Weighing raw materials of each component according to a formula, mixing cement, sand, artificial granite waste powder, quicklime powder, gypsum and an additive, and stirring for 3min at a speed of 500r/min to obtain a premix;
(2) Adding four fifths of water into the premix obtained in the step (1), and stirring for 5min at the speed of 4000r/min to obtain slurry, wherein the expansion degree of the slurry is about 200mm;
(3) Mixing the rest water and aluminum powder paste uniformly, adding the mixture into the slurry obtained in the step (2), stirring for 1min at the speed of 4000r/min, then pouring the slurry into a mold after heating to 40 ℃, lightly vibrating the mold to level the slurry, adding a heat-preserving and moisture-preserving cover outside the mold to prevent water vapor from being dispersed, and immediately placing the mold into a microwave curing box for intermittent microwave heating curing, wherein the intermittent microwave heating curing is that microwave heating is started every 5min, each time of microwave heating lasts for 4min, the temperature of the intermittent microwave heating curing is controlled to be 50 ℃, the power is 100W, the frequency is 5800MHz, the time of the intermittent microwave heating curing is 3h, and demoulding is carried out after the intermittent microwave heating curing is finished, so that the concrete block can be obtained.
Example 5:
the autoclaved aerated concrete block comprises a dry material and water, wherein the weight ratio of the water to the dry material is 0.42, and the dry material comprises the following raw material components in parts by weight: 33.5 parts of cement, 32.5 parts of sand, 20 parts of artificial granite waste powder, 10 parts of quicklime powder, 3.25 parts of gypsum, 0.13 part of aluminum paste and 0.03 part of additive; the additive is a combination of sodium dodecyl benzene sulfonate triethanolamine and anhydrous sodium sulfate; the waste powder of the artificial granite is obtained by press filtration and drying in the production process of the organic artificial stone, and the fineness of the waste powder of the artificial granite is 20 mu m; the cement is Portland cement with the number P.O and 42.5; the sand is a combination of pure quartz sand and machine-made sand, and the fineness of the sand is 100 meshes; the D50 of the artificial granite waste powder is 20 mu m, the artificial granite waste powder is modified artificial granite waste powder subjected to pretreatment, the artificial granite waste powder is prepared by uniformly stirring and mixing the artificial granite waste powder, sodium vinylsulfonate, sodium bisulfate, ammonium persulfate and water, then continuing to stir and react for 1.5 hours at 58 ℃, performing suction filtration to obtain a precipitate, and drying the precipitate to obtain the modified artificial granite waste powder; the gypsum is a combination of desulfurization gypsum of a tobacco plant, and the fineness of the gypsum is 200 meshes; the quicklime powder is the quicklime powder which is ground after normal firing, the content of effective calcium oxide in the quicklime is 77%, and the fineness of the quicklime is 200 meshes; the content of active aluminum in the aluminum powder paste is 95%, and the fineness of the aluminum powder paste is 200 meshes.
The preparation method of the artificial granite waste powder autoclaved-free aerated concrete block comprises the following steps:
(1) Weighing raw materials of each component according to a formula, mixing cement, sand, artificial granite waste powder, quicklime powder, gypsum and an additive, and stirring for 4min at a speed of 1000r/min to obtain a premix;
(2) Adding water of four fifths into the premix obtained in the step (1), and stirring for 6min at a speed of 5000r/min to obtain slurry, wherein the expansion degree of the slurry is about 300mm;
(3) Uniformly mixing the rest water and aluminum powder paste, adding the mixture into the slurry obtained in the step (2), stirring for 1.5min at the speed of 5000r/min, then pouring the slurry into a mold after heating to 43 ℃, gently vibrating the mold to flatten the slurry, adding a heat-preserving and moisture-preserving cover outside the mold to prevent water vapor from being dispersed, and immediately placing the mold into a microwave curing box for intermittent microwave heating curing, wherein the intermittent microwave heating curing is to start microwave heating once every 12min, each microwave heating lasts for 3min, and the time of intermittent microwave heating curing is 2.5h; the intermittent microwave heating maintenance is sequentially divided into two steps of microwave foaming and microwave curing, wherein the temperature of the microwave foaming step is controlled to be 60 ℃, the microwave frequency is 433MHz, the power of the microwave is 250W, the time is controlled to be 25min, the temperature of the microwave curing step is controlled to be 65 ℃, the power of the microwave is 300W, and the time is controlled to be 125min; the microwave foaming step adopts static microwave treatment; and foaming is carried out in the microwave curing step by adopting a movable microwave treatment method, wherein the movable microwave treatment is material conveying belt type microwave treatment in a mould, and the material conveying speed of the conveying belt type microwave treatment is 0.05m/s.
Example 6:
the autoclaved aerated concrete block comprises a dry material and water, wherein the weight ratio of the water to the dry material is 0.48, and the dry material comprises the following raw material components in parts by weight: 35.5 parts of cement, 49.6 parts of sand, 35 parts of artificial granite waste powder, 11.3 parts of quicklime powder, 3.54 parts of gypsum, 0.16 part of aluminum paste and 0.05 part of additive; the additive is a combination of sodium dodecyl sulfate, triethanolamine, anhydrous sodium sulfate and anhydrous sodium carbonate; the artificial granite waste powder is waste powder obtained by filter pressing and drying in the production process of inorganic artificial granite, and the fineness of the artificial granite waste powder is 80 mu m; the cement is Portland cement with the number P.O and 52.5; the sand is a combination of pure quartz sand and machine-made sand, and the fineness of the sand is 120 meshes; the D50 of the artificial granite waste powder is 25 mu m, the artificial granite waste powder is modified artificial granite waste powder subjected to pretreatment, and the preparation method of the artificial granite waste powder comprises the steps of uniformly stirring and mixing the artificial granite waste powder, sodium vinylsulfonate, sodium bisulfate, ammonium persulfate and water, then continuing to stir and react for 1h at 60 ℃, carrying out suction filtration to obtain a precipitate, and drying the precipitate to obtain the modified artificial granite waste powder; the gypsum is natural gypsum, and the fineness of the gypsum is 300 meshes; the quicklime powder is underburned quicklime powder, the content of effective calcium oxide in the quicklime is 83%, and the fineness of the quicklime is 300 meshes; the content of active aluminum in the aluminum powder paste is 91%, and the fineness of the aluminum powder paste is 300 meshes.
The preparation method of the artificial granite waste powder autoclaved-free aerated concrete block comprises the following steps:
(1) Weighing raw materials of each component according to a formula, mixing cement, sand, artificial granite waste powder, quicklime powder, gypsum and an additive, and stirring for 5min at a speed of 1500r/min to obtain a premix;
(2) Adding four fifths of water into the premix obtained in the step (1), and stirring for 7min at the speed of 6000r/min to obtain slurry, wherein the expansion degree of the slurry is about 350mm;
(3) Mixing the rest water and aluminum powder paste uniformly, adding the mixture into the slurry obtained in the step (2), stirring for 2min under the condition of the speed of 6000r/min, then pouring the slurry into a mold after heating to 45 ℃, lightly vibrating the mold to level the slurry, adding a heat-preservation and moisture-preservation cover outside the mold to prevent water vapor from being dispersed, and immediately placing the mold into a microwave curing box for intermittent microwave heating curing, wherein the intermittent microwave heating curing is that microwave heating is started every 15min, each time of microwave heating lasts for 1min, the temperature of the intermittent microwave heating curing is controlled to 75 ℃, the power is 500W, the frequency is 915MHz, the time of the intermittent microwave heating curing is 1h, and demoulding is carried out after the intermittent microwave heating curing is finished, so that the concrete block can be obtained.
Comparative example 1:
the man-made granite waste powder autoclaved aerated concrete block of this comparative example has the same raw material composition as the concrete block of example 1, and the preparation method differs from the method of example 1 only in that in step (3), intermittent microwave heating curing is not used, but the slurry is poured into a mold, placed in an oven, cured at 50 ℃ for 7 days, and demolded to obtain the concrete block.
Comparative example 2:
the man-made granite waste powder autoclaved aerated concrete block of this comparative example has the same raw material composition as the concrete block of example 1, and the preparation method differs from the method of example 1 only in that in step (3), a continuous microwave heating curing mode is adopted, the curing temperature is controlled to be 60 ℃, and microwaves with the power of 150W and the frequency of 915MHz are adopted.
Comparative example 3:
the aerated concrete block of this comparative example differs from the concrete block of example 1 only in that fly ash was used instead of the artificial granite waste powder; the preparation method of the aerated concrete block is different from the method described in example 1 only in that an atmospheric steam curing mode is used, the steam temperature is 80 ℃, and the curing time is 3 days.
Experimental example:
concrete blocks were prepared as samples according to the formulations and methods described in examples 1 to 6 and comparative examples 1 to 3, the samples taken from the molds were cut off to obtain the finished products, and the properties of the finished products were then examined according to the method described in GB/T11968-2020 autoclaved aerated concrete Performance test method, the specific results of which are shown in Table 1.
Table 1 results of performance tests of concrete blocks prepared by different methods.
From the above data, it can be seen that the method according to the present invention can obtain better compressive strength while reducing the dry density and dry shrinkage value of the concrete block, and further can obtain better improvement effect by pre-treating the artificial granite waste powder for use according to the methods described in examples 3 to 6.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (7)
1. A preparation method of an artificial granite waste powder autoclaved aerated concrete block is characterized by comprising the following steps:
the artificial granite waste powder autoclaved-free aerated concrete block comprises dry materials and water, wherein the weight ratio of the water to the dry materials is 0.38-0.48, and the dry materials comprise the following raw material components in parts by weight: 30 to 35.5 parts of cement, 14.6 to 49.6 parts of sand, 5 to 35 parts of artificial granite waste powder, 8 to 11.3 parts of quicklime powder, 2.8 to 3.54 parts of gypsum, 0.11 to 0.16 part of aluminum powder paste and 0.01 to 0.05 part of additive; the additive is any one or a combination of a plurality of sodium dodecyl benzene sulfonate, sodium dodecyl sulfate, triethanolamine, anhydrous sodium sulfate and anhydrous sodium carbonate; the waste powder of the artificial granite is obtained by press filtration and drying in the production process of the organic artificial stone or the inorganic artificial stone, and the fineness of the waste powder of the artificial stone is 10-80 mu m;
the D50 of the artificial granite waste powder is 15-25 mu m, the artificial granite waste powder is modified artificial granite waste powder subjected to pretreatment, the D50 of the modified artificial granite waste powder is 15-25 mu m, the preparation method of the artificial granite waste powder comprises the steps of uniformly stirring and mixing the artificial granite waste powder, sodium vinylsulfonate, sodium bisulfate, ammonium persulfate and water, then continuing stirring and reacting for 1-2 h at 50-60 ℃, performing suction filtration to obtain a precipitate, and drying the precipitate to obtain the modified artificial granite waste powder;
the preparation method of the artificial granite waste powder autoclaved aerated concrete block comprises the following steps:
(1) Weighing raw materials of each component according to a formula, mixing cement, sand, artificial granite waste powder, quicklime powder, gypsum and an additive, and stirring for 3-5 min at a speed of 500-1500 r/min to obtain a premix;
(2) Adding water of four fifths into the premix obtained in the step (1), and stirring for 5-7 min under the condition of 4000-6000 r/min to obtain slurry;
(3) Uniformly mixing the rest water and aluminum powder paste, adding the mixture into the slurry obtained in the step (2), stirring for 1-2 min at the speed of 4000-6000 r/min, pouring the slurry into a mould, and then placing the mould into a microwave curing box for intermittent microwave heating curing, wherein the intermittent microwave heating curing is to start microwave heating once every 5-15 min, each time of microwave heating lasts for 1-4 min, the temperature of the intermittent microwave heating curing is controlled to be 50-75 ℃, microwaves with the power of 100-500W and the frequency of 400-6000 MHz are adopted, the time of the intermittent microwave heating curing is 1-3 h, and demoulding is carried out after the intermittent microwave heating curing is finished, so that the concrete block can be obtained;
the intermittent microwave heating curing is sequentially divided into two steps of microwave foaming and microwave curing, wherein the temperature of the microwave foaming step is controlled to be 50-60 ℃, the power of the microwave is 100-250W, the time is controlled to be 25-30 min, the temperature of the microwave curing step is controlled to be 65-75 ℃, the power of the microwave is 250-500W, and the time is controlled to be 30-150 min.
2. The method for preparing the artificial granite waste powder autoclaved aerated concrete block as claimed in claim 1, wherein the method comprises the following steps: the cement is Portland cement numbered P.O 42.5 or P.O 52.5.52.5; the fineness of the sand is more than 100 meshes, and the sand is any one or a combination of a plurality of dried river sand, pure quartz sand and machine-made sand.
3. The method for preparing the artificial granite waste powder autoclaved aerated concrete block as claimed in claim 1, wherein the method comprises the following steps: the gypsum is one or a combination of two of desulfurized gypsum and natural gypsum of a tobacco plant, and the fineness of the gypsum is 100-300 meshes.
4. The method for preparing the artificial granite waste powder autoclaved aerated concrete block as claimed in claim 1, wherein the method comprises the following steps: the quicklime powder is quicklime powder which is ground after underburned or normal burned, the content of effective calcium oxide in the quicklime is more than 70%, and the fineness of the quicklime is 100-300 meshes; the content of active aluminum in the aluminum powder paste is more than 90%, and the fineness of the aluminum powder paste is 100-300 meshes.
5. The method for preparing the artificial granite waste powder autoclaved aerated concrete block as claimed in claim 1, wherein the method comprises the following steps: the expansion degree of the sizing agent obtained in the step (2) is 200-350 mm.
6. The method for preparing the artificial granite waste powder autoclaved aerated concrete block as claimed in claim 1, wherein the method comprises the following steps: in the step (3), the rest water and aluminum powder paste are taken and mixed uniformly, then added into the slurry obtained in the step (2), stirred for 1-2 min under the condition of 4000-6000 r/min, then heated to 40-45 ℃, poured into a mould, and then placed into a microwave curing box for intermittent microwave heating curing.
7. The method for preparing the artificial granite waste powder autoclaved aerated concrete block as claimed in claim 1, wherein the method comprises the following steps: in the step (3), foaming is carried out by adopting a static microwave treatment or a mobile microwave treatment method in the microwave foaming step, wherein the mobile microwave treatment is material rotation type microwave treatment or conveyor type microwave treatment in a mould, the material rotation speed of the rotation type microwave treatment is 60-120 rpm/min, and the material conveying speed of the conveyor type microwave treatment is 0.05-0.1 m/s; the microwave curing step adopts a static microwave treatment or mobile microwave treatment method to foam, the mobile microwave treatment is material rotary microwave treatment or conveyor belt type microwave treatment in a mould, the material rotating speed of the rotary microwave treatment is 30-60 rpm/min, and the material conveying speed of the conveyor belt type microwave treatment is 0.01-0.05 m/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210985855.9A CN115321911B (en) | 2022-08-17 | 2022-08-17 | Artificial granite waste powder autoclaved aerated concrete block and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210985855.9A CN115321911B (en) | 2022-08-17 | 2022-08-17 | Artificial granite waste powder autoclaved aerated concrete block and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115321911A CN115321911A (en) | 2022-11-11 |
| CN115321911B true CN115321911B (en) | 2023-07-21 |
Family
ID=83923608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210985855.9A Active CN115321911B (en) | 2022-08-17 | 2022-08-17 | Artificial granite waste powder autoclaved aerated concrete block and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115321911B (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1176050A (en) * | 1982-01-22 | 1984-10-16 | W.J. Dennis Stone | Cellular insulation from naturally occurring minerals |
| CN110936485B (en) * | 2019-12-27 | 2021-07-16 | 广西科学院 | Microwave curing method for building blocks |
| CN114800778A (en) * | 2022-06-30 | 2022-07-29 | 山东科扬机械有限公司 | Method for preparing aerated concrete block by using foundry sand |
-
2022
- 2022-08-17 CN CN202210985855.9A patent/CN115321911B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN115321911A (en) | 2022-11-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106348643B (en) | Modified concrete swelling agent | |
| CN101581131B (en) | Non-autoclaved aerated concrete building block and manufacturing method | |
| CN113620646B (en) | High-alumina fly ash self-insulation autoclaved aerated concrete block and preparation method thereof | |
| CN112028565A (en) | Recycled coarse aggregate seawater sea sand concrete and preparation method and application thereof | |
| CN108947431A (en) | A kind of steam pressure porcelain powder air entrained concrete heat insulation building block | |
| CN115180907B (en) | Preparation method of foam concrete | |
| CN114573315B (en) | Autoclaved carbonization maintenance regenerated lightweight concrete and preparation method thereof | |
| CN114605121B (en) | Tungsten tailing autoclaved aerated concrete and preparation method thereof | |
| WO2020118804A1 (en) | Method for producing water permeable brick using dredged sediment firing-free aggregate | |
| CN115321911B (en) | Artificial granite waste powder autoclaved aerated concrete block and preparation method thereof | |
| CN113929425B (en) | Building block and preparation method thereof | |
| CN115572140A (en) | Silicon tail mud high-strength autoclaved aerated concrete and preparation method thereof | |
| CN115974477A (en) | Ultra-high performance concrete containing rare earth polishing powder waste and preparation method thereof | |
| CN114988835A (en) | Carbide slag-based high-solid-carbon-content non-autoclaved aerated concrete and preparation method thereof | |
| CN115784769A (en) | Foam concrete based on high-activity calcium-based carbon absorption and preparation method thereof | |
| CN114605134A (en) | High-strength low-density autoclaved aerated concrete and preparation method thereof | |
| CN108395170B (en) | Foamed cement heat-insulation board based on foamed concrete waste | |
| CN110105034B (en) | Natural curing aerated concrete block production process | |
| CN115849940B (en) | Aerated concrete and preparation method thereof | |
| CN111187093A (en) | Non-autoclaved concrete aerated insulating brick produced by utilizing construction waste and production method thereof | |
| CN117865628A (en) | Steam-curing-free aerated concrete and preparation method thereof | |
| CN106278092A (en) | A kind of high strenght flyash gives up brick and tile air-entrained concrete building block and processing method thereof | |
| CN106565270A (en) | Preparation method for producing autoclaved aerated concrete by using silicon sludge and product prepared by using preparation method | |
| CN116199463A (en) | Foam concrete prepared from air hardening cementing material and preparation method thereof | |
| CN106242470A (en) | A kind of high strenght flyash Vermiculitum air-entrained concrete building block and processing method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20230223 Address after: 530007 No.98 Daling Road, Nanning University, Guangxi Zhuang Autonomous Region Applicant after: GUANGXI ACADEMY OF SCIENCES Applicant after: Guangxi Ulanju New Materials Co.,Ltd. Applicant after: Guangxi Zhongke microwave advanced manufacturing industry technology Research Institute Applicant after: Nanning Zhongke microwave advanced manufacturing industry technology Research Institute Applicant after: Foshan concrete Yao Technology Development Co.,Ltd. Address before: 530007 No.98 Daling Road, Nanning University, Guangxi Zhuang Autonomous Region Applicant before: GUANGXI ACADEMY OF SCIENCES Applicant before: Guangxi Ulanju New Materials Co.,Ltd. Applicant before: Guangxi Zhongke microwave advanced manufacturing industry technology Research Institute Applicant before: Nanning Zhongke microwave advanced manufacturing industry technology Research Institute |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |