CN111233417A - Preparation process of high-strength concrete - Google Patents
Preparation process of high-strength concrete Download PDFInfo
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- CN111233417A CN111233417A CN202010132398.XA CN202010132398A CN111233417A CN 111233417 A CN111233417 A CN 111233417A CN 202010132398 A CN202010132398 A CN 202010132398A CN 111233417 A CN111233417 A CN 111233417A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/14—Producing shaped prefabricated articles from the material by simple casting, the material being neither forcibly fed nor positively compacted
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
- B28B11/245—Curing concrete articles
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/02—Selection of the hardening environment
- C04B40/0259—Hardening promoted by a rise in pressure
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
The invention relates to a preparation process of high-strength concrete, which comprises the following construction steps: s1, preparing cement; s2, preparing a concrete additive; s3, preparing concrete; s4, pouring concrete; s5, curing the concrete: and (2) arranging a supporting frame along the outer side of the concrete, filling inflatable air bags in gaps between each surface of the concrete and the supporting frame respectively, connecting air inlets of the inflatable air bags with a pressure hot air source through air guide pipes, jacking the inflatable air bags on the surface of the concrete, and removing the supporting frame on the outer side of the concrete after keeping the inflatable air bags for 0.8-1.5 days to obtain the high-strength concrete. The concrete has the advantages of reasonable raw material proportion, stable chemical properties of the raw materials, further optimized curing process, improved integral strength parameters and prolonged service life.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a preparation process of high-strength concrete.
Background
The concrete is called concrete for short, which means that cement is used as a cementing material, and sand and stone are used as aggregates; the cement concrete, also called as common concrete, is obtained by mixing with water (which may contain additives and admixtures) according to a certain proportion and stirring, and is widely applied to civil engineering. Concrete is one of the materials commonly used in modern building engineering, but the strength of a common concrete structure is limited, and the concrete structure is difficult to meet the requirements of some special engineering, so that the concrete structure has room for improvement.
In the prior art, the invention of Chinese patent with publication number CN110577390A discloses a concrete preparation process, wherein coarse aggregate, fiber filler and water are added into a second mixture, and a third mixture is prepared after uniform stirring; the weight ratio of the fine aggregate, the coarse aggregate, the fiber filler and the water is 1: (2-2.4): (0.06-0.1): (0.08-0.12). Adding an additive into the third mixture, and uniformly stirring to obtain concrete slurry; wherein, the fiber filler comprises the following raw materials in percentage by weight: 10-20% of steel fiber, 10-20% of carbon fiber, 10-20% of sepiolite fiber, 3-7% of coupling agent, 20-30% of waterborne acrylic polyurethane, 2-6% of polymaleic anhydride and the balance of water.
The above prior art solutions have the following drawbacks: in the formula of the concrete, the steel fiber, the carbon fiber and the sepiolite fiber are added to increase the strength of the concrete, and are mutually blocked by the water-based acrylic polyurethane, so that the added materials are damaged or failed due to various reasons, the corrosion speed of the concrete is accelerated, and the strength of the concrete is gradually reduced. Therefore, the overall strength and stability of the concrete structure of the building are not satisfactory.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a preparation process of high-strength concrete, which has the advantages of reasonable raw material proportion, stable chemical properties of the raw materials, further optimized maintenance process of the concrete, improved integral strength parameters of the concrete and prolonged service life.
The above object of the present invention is achieved by the following technical solutions:
a preparation process of high-strength concrete comprises the following construction steps:
s1, preparing cement: sequentially mixing cement clinker, gypsum, fly ash, coal gangue and calcium stearate according to the ratio of (10-12): (8-10): (1-1.5): (0.2-0.4): (0.1-0.2), putting the mixture into a heating stirring kettle, heating to 100-120 ℃, preserving heat for 0.5-1 h, and then putting the mixture into a fine grinding machine for refining treatment to obtain cement for later use;
s2, preparing a concrete additive: sequentially mixing sodium p-hydroxybenzenesulfonate, triphenyl phosphite, modified chitosan, barium stearate and dibutyltin laurate according to the proportion of (10-18): (10-15): (5-7): (2-3): (0.01-0.03), and putting the mixture into a stirring tank for fully stirring to obtain the concrete additive for later use;
s3, preparing concrete: putting the cement and the concrete additive prepared in the steps into a concrete stirrer together with water, fine aggregate, an anti-cracking agent and a water reducing agent, wherein the weight ratio of the input amount of each raw material is (10-12): (2-4): (20-25): (8-12): (0.02-0.03): (0.01-0.02), fully stirring by a concrete stirrer to prepare concrete, conveying the concrete to a construction site by a cement mixer, and keeping a stirring tank of the cement mixer in a low-speed stirring state;
s4, pouring concrete: installing a pouring template for pouring concrete along a set position, pouring the concrete prepared in the step into a pouring mold cavity formed by the pouring template, after the concrete is poured for 40-50 min, achieving the initial setting state of the concrete, dismantling the pouring template and pasting a moisture retention film along each surface of the concrete;
s5, curing the concrete: erecting a supporting frame along the outer side of the initially-set concrete member, filling inflatable air bags in gaps between the surfaces of the concrete member and the supporting frame respectively, connecting air inlets of the inflatable air bags with a pressure hot air source through air guide pipes, jacking the inflatable air bags on the surface of the concrete member, and removing the supporting frame on the outer side of the concrete member after keeping for 0.8-1.5 days, thereby obtaining the high-strength concrete.
By adopting the technical scheme, the construction method comprises the specific steps of preparing cement, preparing a concrete additive, preparing concrete, pouring concrete and maintaining the concrete, wherein the cement is prepared from cement clinker, gypsum, fly ash slag, coal gangue and calcium stearate according to a set proportion, the concrete additive is prepared from sodium p-hydroxybenzenesulfonate, triphenyl phosphite, modified chitosan, barium stearate and dibutyltin laurate according to a set proportion, the concrete is prepared from the cement, the concrete additive, water, fine aggregate, an anti-cracking agent and a water reducing agent according to a set proportion, the proportion of the raw materials in the concrete is reasonable, and the chemical properties of the raw materials are stable; meanwhile, gaps between each surface of the concrete member and the supporting frame are filled with the inflatable air bags, and air is filled into the inflatable air bags through a pressure hot air source, so that certain jacking acting force is exerted on each surface of the concrete member, the concrete member is extruded by the inflatable air bags in the solidification process, the tissue structure of the solidified concrete member is more compact, the number of internal air holes is small, the contact area between the inflatable air bags and the surfaces of the concrete member is larger, and the pressure intensity is basically consistent, so that the surface of the concrete member is prevented from cracking in the solidification process, the integral strength parameter of the concrete is improved, and the service life of the concrete is prolonged.
The present invention in a preferred example may be further configured to: the air pressure value in the inflatable air bag is 0.5-0.8 mpa.
By adopting the technical scheme, the pressure hot gas source is used for filling gas into the inflatable air bag, and the inflatable air bag is internally provided with an air pressure value with a proper size, so that the top pressure effect of forming a proper pressure value on the surface of the concrete member is realized.
The present invention in a preferred example may be further configured to: the gas temperature of the pressure hot gas source is 30-40 ℃.
Through adopting above-mentioned technical scheme, aerify the gasbag and be connected with pressure hot gas source through the air duct, provide suitable heat supply for the concrete member in the in-process of maintenance to improve the comprehensive properties of the concrete member after solidifying.
The present invention in a preferred example may be further configured to: in the step S3, the weight ratios of the cement, the concrete additive, the water, the fine aggregate, the anti-cracking agent and the water reducing agent are sequentially 11: 3: 22: 10: 0.025: 0.015.
by adopting the technical scheme, the raw materials in the raw materials of the concrete are reasonable in proportion, and the anti-cracking agent, the water reducing agent and other additives are added, so that the water consumption for mixing can be reduced, and meanwhile, the anti-cracking and anti-cracking are carried out from the two aspects of physics and chemistry, and the strength of cement mortar and concrete can be obviously improved.
The present invention in a preferred example may be further configured to: in the step S2, the weight ratio of the sodium p-hydroxybenzenesulfonate, the triphenyl phosphite, the modified chitosan, the barium stearate and the dibutyltin laurate is 14: 12: 6: 2.5: 0.02.
by adopting the technical scheme, the raw materials in the raw materials of the concrete additive are reasonable in proportion, and the modified chitosan is a biological fiber material and forms a fiber structure with higher strength in concrete after being fully mixed with barium stearate, dibutyltin laurate and the like.
The present invention in a preferred example may be further configured to: in the step S1, the weight ratio of cement clinker, gypsum, fly ash slag, coal gangue and calcium stearate is 11: 9: 1.2: 0.3: 0.15.
by adopting the technical scheme, the fly ash, the coal gangue and the calcium stearate which are reasonably proportioned are added into the raw materials of the cement, so that the using amount of cement clinker is greatly saved, various comprehensive properties of the cement are improved, and the problem of waste utilization of the fly ash and the coal gangue is solved.
The present invention in a preferred example may be further configured to: the fine aggregate is selected from 1-1.5 mm-sized crushed stone, crushed gravel, screened gravel or slag.
By adopting the technical scheme, the fine aggregate with the particle size of 1-1.5 mm and other raw materials in the concrete are mixed more uniformly, and meanwhile, raw materials such as broken stones, broken gravels, screened gravels or slag can be fully utilized.
The present invention in a preferred example may be further configured to: the anti-cracking agent is prepared from the following raw materials in parts by weight: 8-10 parts of anhydrous copper sulfate, 10-14 parts of calcined gypsum, 5-6 parts of alumina and 1.5-2.5 parts of carboxymethyl cellulose.
By adopting the technical scheme, the anti-cracking agent is composed of anhydrous copper sulfate, calcined gypsum, aluminum oxide and carboxymethyl cellulose in a reasonable ratio, and is more suitable for the anti-cracking requirement of concrete.
In summary, the invention includes at least one of the following beneficial technical effects:
the concrete steps of the construction method of the invention are divided into the construction steps of preparing cement, preparing concrete additive, preparing concrete, pouring concrete and curing concrete, wherein the cement is prepared by cement clinker, gypsum, fly ash slag, coal gangue and calcium stearate according to a set proportion, the concrete additive is prepared by sodium p-hydroxybenzenesulfonate, triphenyl phosphite, modified chitosan, barium stearate and dibutyltin laurate according to a set proportion, the concrete is prepared by cement, concrete additive, water, fine aggregate, anti-cracking agent and water reducing agent according to a set proportion, the proportion of each raw material in the concrete is reasonable, and each chemical property of each raw material is stable; meanwhile, gaps between the surfaces of the concrete member and the supporting frame are filled with the inflatable air bags, and gas is filled into the inflatable air bags through a pressure hot gas source, so that a certain jacking acting force is exerted on the surfaces of the concrete member, the concrete member is extruded by the inflatable air bags in the solidification process, the solidified concrete member is more compact in tissue structure, the number of internal air holes is small, and the contact area between the inflatable air bags and the surfaces of the concrete member is larger and the pressure intensity is basically consistent, so that the surface of the concrete member is ensured not to crack in the solidification process, the integral strength parameter of the concrete member is improved, and the service life of the concrete member is prolonged;
the invention fills gas into the inflatable air bag through the pressure hot gas source, and the inside of the inflatable air bag has a proper air pressure value, thereby realizing the jacking action of forming a proper pressure value on the surface of the concrete member; the inflatable air bag is connected with a pressure hot air source through an air duct, and provides proper heat supply for the concrete in the curing process, so that the comprehensive performance of the solidified concrete is improved;
the raw materials of the concrete are reasonable in proportion, and the anti-cracking agent, the water reducing agent and other additives are added, so that the water consumption for mixing can be reduced, and meanwhile, the anti-cracking and anti-cracking are carried out from the physical and chemical aspects, and the strength of cement mortar and the concrete can be obviously improved; the fly ash, the coal gangue and the calcium stearate which are reasonably proportioned are added into the raw materials of the cement, so that the using amount of cement clinker is greatly saved, various comprehensive properties of the cement are improved, and the problem of waste utilization of the fly ash and the coal gangue is solved.
Drawings
FIG. 1 is a schematic view of the construction process of the present invention.
FIG. 2 is a schematic view of concrete curing construction according to the present invention.
Reference numerals: 1. a concrete member; 2. a moisture retention film; 3. a support frame; 4. an inflatable air bag; 5. an air inlet; 6. a source of pressurized hot gas; 7. an air duct.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The first embodiment is as follows:
referring to fig. 1 and 2, the preparation process of the high-strength concrete disclosed by the invention comprises the following construction steps:
s1, preparing cement: sequentially mixing cement clinker, gypsum, fly ash slag, coal gangue and calcium stearate according to the weight ratio of 11: 9: 1.2: 0.3: 0.15, putting the mixture into a heating stirring kettle, heating to 100-120 ℃, preserving heat for 0.5-1 h, and then putting the mixture into a fine grinding machine for refining to obtain cement for later use;
s2, preparing a concrete additive: sequentially mixing sodium p-hydroxybenzenesulfonate, triphenyl phosphite, modified chitosan, barium stearate and dibutyltin laurate according to the weight ratio of 14: 12: 6: 2.5: 0.02 weight ratio, and putting the mixture into a stirring tank for fully stirring to obtain the concrete additive for later use;
s3, preparing concrete: putting the cement and the concrete additive prepared in the steps into a concrete stirrer together with water, fine aggregate, an anti-cracking agent and a water reducing agent, wherein the weight ratio of the input amount of each raw material is 11: 3: 22: 10: 0.025: 0.015, the anti-cracking agent is composed of the following raw materials in parts by weight: 9 parts of anhydrous copper sulfate, 12 parts of plaster of paris, 5.5 parts of alumina and 2 parts of carboxymethyl cellulose, wherein the concrete is prepared after fully stirring by a concrete stirrer, the concrete is conveyed to a construction site by a cement mixer, and a stirring tank of the cement mixer keeps a low-speed stirring state;
s4, pouring concrete: installing a pouring template for pouring concrete along a set position, pouring the concrete prepared in the step into a pouring mold cavity formed by the pouring template, after the concrete is poured for 40-50 min, achieving the initial setting state of the concrete, dismantling the pouring template and attaching a moisture retention film 2 along each surface of the concrete;
s5, curing the concrete: erecting a supporting frame 3 along the outer side of the initially-solidified concrete member 1, respectively filling inflatable airbags 4 in gaps between each surface of the concrete member 1 and the supporting frame 3, connecting air inlets 5 of the inflatable airbags 4 with a pressure hot air source 6 through air guide pipes 7, enabling the inflatable airbags 4 to be pressed on the surface of the concrete member 1, enabling the air pressure value in the inflatable airbags 4 to be 0.5-0.8 mpa, enabling the gas temperature of the pressure hot air source 6 to be 30-40 ℃, and detaching the supporting frame 3 on the outer side of the concrete member 1 after keeping for 0.8-1.5 days, so as to obtain the high-strength concrete.
Example two:
referring to fig. 1 and 2, the preparation process of the high-strength concrete disclosed by the invention comprises the following construction steps:
s1, preparing cement: sequentially mixing cement clinker, gypsum, fly ash slag, coal gangue and calcium stearate according to the weight ratio of 10: 8: 1: 0.2: 0.1, putting the mixture into a heating stirring kettle, heating to 100-120 ℃, preserving heat for 0.5-1 h, and then putting the mixture into a fine grinding machine for refining to obtain cement for later use;
s2, preparing a concrete additive: sequentially mixing sodium p-hydroxybenzenesulfonate, triphenyl phosphite, modified chitosan, barium stearate and dibutyltin laurate according to the weight ratio of 10: 10: 5: 2: 0.01, putting the mixture into a stirring tank for fully stirring to obtain the concrete additive for later use;
s3, preparing concrete: putting the cement and the concrete additive prepared in the steps into a concrete stirrer together with water, fine aggregate, an anti-cracking agent and a water reducing agent, wherein the weight ratio of the input amount of each raw material is 10: 2: 20: 8: 0.02: 0.01, the anti-cracking agent is composed of the following raw materials in parts by weight: 8 parts of anhydrous copper sulfate, 10 parts of plaster of paris, 5 parts of alumina and 1.5 parts of carboxymethyl cellulose, wherein the concrete is prepared after the concrete stirrer is fully stirred, the concrete is conveyed to a construction site through a cement mixer truck, and a mixing tank of the cement mixer truck keeps a low-speed mixing state;
s4, pouring concrete: installing a pouring template for pouring concrete along a set position, pouring the concrete prepared in the step into a pouring mold cavity formed by the pouring template, after the concrete is poured for 40-50 min, achieving the initial setting state of the concrete, dismantling the pouring template and attaching a moisture retention film 2 along each surface of the concrete;
s5, curing the concrete: erecting a supporting frame 3 along the outer side of the initially-solidified concrete member 1, respectively filling inflatable airbags 4 in gaps between each surface of the concrete member 1 and the supporting frame 3, connecting air inlets 5 of the inflatable airbags 4 with a pressure hot air source 6 through air guide pipes 7, enabling the inflatable airbags 4 to be pressed on the surface of the concrete member 1, enabling the air pressure value in the inflatable airbags 4 to be 0.5-0.8 mpa, enabling the gas temperature of the pressure hot air source 6 to be 30-40 ℃, and detaching the supporting frame 3 on the outer side of the concrete member 1 after keeping for 0.8-1.5 days, so as to obtain the high-strength concrete.
The implementation principle of the embodiment is as follows: the concrete steps of the construction method in the embodiment are divided into the construction steps of preparing cement, preparing a concrete additive, preparing concrete, pouring the concrete and maintaining the concrete, wherein the cement is prepared from cement clinker, gypsum, fly ash, coal gangue and calcium stearate according to a set proportion, the concrete additive is prepared from sodium p-hydroxybenzenesulfonate, triphenyl phosphite, modified chitosan, barium stearate and dibutyltin laurate according to a set proportion, the concrete is prepared from the cement, the concrete additive, water, fine aggregate, an anti-cracking agent and a water reducing agent according to a set proportion, the proportion of the raw materials in the concrete is reasonable, and the chemical properties of the raw materials are stable; meanwhile, gaps between the surfaces of the concrete member 1 and the supporting frame 3 are filled with the inflatable air bags 4, and gas is filled into the inflatable air bags 4 through the pressure hot gas source 6, so that a certain jacking acting force is exerted on the surfaces of the concrete member 1, the concrete member 1 is extruded by the inflatable air bags 4 in the solidification process, the solidified concrete member 1 is more compact in tissue structure, the number of internal air holes is small and small, and the contact area between the inflatable air bags 4 and the surfaces of the concrete member 1 is larger and the pressure intensity is basically consistent, so that the surface of the concrete member 1 is ensured not to crack in the solidification process, the integral strength parameter of the concrete is improved, and the service life of the concrete is prolonged; in the embodiment, the pressure hot air source 6 is used for filling air into the inflatable air bag 4, and the air pressure value in the inflatable air bag 4 has a proper value, so that the top pressure effect of forming a proper pressure value on the surface of the concrete member 1 is realized; the inflatable air bag 4 is connected with a pressure hot air source 6 through an air duct 7 to provide proper heat supply for the concrete member 1 in the curing process. The raw materials in the concrete are reasonable in proportion, and the anti-cracking agent, the water reducing agent and other additives are added, so that the water consumption for mixing can be reduced, and meanwhile, the anti-cracking and anti-cracking are carried out from the physical and chemical aspects, and the strength of cement mortar and concrete can be obviously improved; the fly ash, the coal gangue and the calcium stearate which are reasonably proportioned are added into the raw materials of the cement, so that the using amount of cement clinker is greatly saved, and various comprehensive properties of the cement are improved.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (8)
1. The preparation process of the high-strength concrete is characterized by comprising the following construction steps of:
s1, preparing cement: sequentially mixing cement clinker, gypsum, fly ash, coal gangue and calcium stearate according to the ratio of (10-12): (8-10): (1-1.5): (0.2-0.4): (0.1-0.2), putting the mixture into a heating stirring kettle, heating to 100-120 ℃, preserving heat for 0.5-1 h, and then putting the mixture into a fine grinding machine for refining treatment to obtain cement for later use;
s2, preparing a concrete additive: sequentially mixing sodium p-hydroxybenzenesulfonate, triphenyl phosphite, modified chitosan, barium stearate and dibutyltin laurate according to the proportion of (10-18): (10-15): (5-7): (2-3): (0.01-0.03), and putting the mixture into a stirring tank for fully stirring to obtain the concrete additive for later use;
s3, preparing concrete: putting the cement and the concrete additive prepared in the steps into a concrete stirrer together with water, fine aggregate, an anti-cracking agent and a water reducing agent, wherein the weight ratio of the input amount of each raw material is (10-12): (2-4): (20-25): (8-12): (0.02-0.03): (0.01-0.02), fully stirring by a concrete stirrer to prepare concrete, conveying the concrete to a construction site by a cement mixer, and keeping a stirring tank of the cement mixer in a low-speed stirring state;
s4, pouring concrete: installing a pouring template for pouring concrete along a set position, pouring the concrete prepared in the step into a pouring mold cavity formed by the pouring template, after the concrete is poured for 40-50 min, achieving the initial setting state of the concrete, dismantling the pouring template and attaching a moisture-preserving film (2) along each surface of the concrete;
s5, curing the concrete: erecting a supporting frame (3) along the outer side of the initially-solidified concrete member (1), filling gaps between each surface of the concrete member (1) and the supporting frame (3) with inflatable air bags (4), connecting air inlets (5) of the inflatable air bags (4) with a pressure hot air source (6) through air guide pipes (7), jacking the inflatable air bags (4) on the surface of the concrete member (1), and removing the supporting frame (3) on the outer side of the concrete member (1) after keeping for 0.8-1.5 d, so that the high-strength concrete is obtained.
2. The process for preparing high-strength concrete according to claim 1, wherein: the air pressure value in the inflatable air bag (4) is 0.5-0.8 mpa.
3. The process for preparing high-strength concrete according to claim 2, wherein: the gas temperature of the pressure hot gas source (6) is 30-40 ℃.
4. The process for preparing high-strength concrete according to claim 1, wherein: in the step S3, the weight ratios of the cement, the concrete additive, the water, the fine aggregate, the anti-cracking agent and the water reducing agent are sequentially 11: 3: 22: 10: 0.025: 0.015.
5. the process for preparing high-strength concrete according to claim 1, wherein: in the step S2, the weight ratio of the sodium p-hydroxybenzenesulfonate, the triphenyl phosphite, the modified chitosan, the barium stearate and the dibutyltin laurate is 14: 12: 6: 2.5: 0.02.
6. the process for preparing high-strength concrete according to claim 1, wherein: in the step S1, the weight ratio of cement clinker, gypsum, fly ash slag, coal gangue and calcium stearate is 11: 9: 1.2: 0.3: 0.15.
7. the process for preparing a high-strength concrete according to any one of claims 1 to 6, wherein: the fine aggregate is selected from 1-1.5 mm-sized crushed stone, crushed gravel, screened gravel or slag.
8. The process for preparing high-strength concrete according to claim 7, wherein: the anti-cracking agent is prepared from the following raw materials in parts by weight: 8-10 parts of anhydrous copper sulfate, 10-14 parts of calcined gypsum, 5-6 parts of alumina and 1.5-2.5 parts of carboxymethyl cellulose.
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| CN113310804A (en) * | 2021-05-25 | 2021-08-27 | 胡斯楞 | Concrete slab intensity detection device for building |
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