CN112759337A - Active powder concrete with high-content solid waste and preparation and use method thereof - Google Patents
Active powder concrete with high-content solid waste and preparation and use method thereof Download PDFInfo
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- CN112759337A CN112759337A CN202110254701.8A CN202110254701A CN112759337A CN 112759337 A CN112759337 A CN 112759337A CN 202110254701 A CN202110254701 A CN 202110254701A CN 112759337 A CN112759337 A CN 112759337A
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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
- C04B28/02—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
- C04B28/06—Aluminous cements
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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
- C04B40/024—Steam hardening, e.g. in an autoclave
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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
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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
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
Abstract
The active powder concrete with large mixing amount of solid waste and the preparation and use method thereof comprise the following raw materials in parts by weight: and (3) cementing materials: 60-100 parts; fly ash: 10-30 parts; silica fume: 1-10 parts; granite sawing mud: 30-60 parts; gold tailings: 80-160 parts; swelling agent: 0.02-0.05 part of high-strength fiber with volume mixing amount of 0.5-2 percent. The method has the characteristics that a large amount of industrial solid waste is doped, the granite saw mud with large specific surface area and certain activity index is adopted to replace ground quartz powder, the characteristic of high strength of gold tailing sand is utilized to replace fine quartz sand as aggregate, a small amount of silica fume is used for filling the granite saw mud and the stacking pores of a cementing material, and the prepared active powder concrete particles have the advantages of small stacking porosity, high compactness, low preparation cost, high resource utilization degree of industrial waste, environmental protection, high strength, good external environment erosion resistance, simple preparation method and the like.
Description
Technical Field
The application relates to a reactive powder concrete with large mixing amount of solid waste and a preparation and use method thereof.
Background
The active powder concrete is a modern advanced cement-based material, utilizes the principle of dense accumulation among particles with different grain diameters to remove coarse aggregates, eliminates the influence of coarse aggregate interfaces, is added with steel fibers to prevent the contraction and cracking of the concrete, and has excellent performances of ultrahigh strength, high toughness, low permeability, good volume stability and the like. Due to the advantages, the method has a good application prospect in various fields such as national defense engineering, harbor engineering, underground engineering, bridge engineering, railway engineering, structural earthquake resistance and the like. The active powder concrete basically comprises the following components: cementing materials, quartz sand, ground quartz powder, silica fume, a high-performance water reducing agent, steel fibers and the like. The raw materials used by the reactive powder concrete, particularly quartz sand and quartz powder, are expensive and high in preparation cost, so that the popularization and application of the reactive powder concrete in engineering are greatly restricted. With the rapid development of industrial production in China, the quantity, scale and yield of industrial solid wastes are increasing day by day, however, the ore grade is continuously reduced, the mining intensity is increased day by day, and the yield of wastes is also increased dramatically. The accumulation of a large amount of industrial wastes not only requires a considerable capital investment, but also brings a series of environmental pollution problems. However, the raw materials of the active powder concrete are high in requirement, otherwise, the parameter requirement of the active powder concrete cannot be met, so that the solid waste cannot be applied to the production of the powder concrete, and as a result, the raw materials such as quartz sand, quartz powder and the like are more applied to the active powder concrete, so that the manufacturing cost of the active powder concrete is high.
Disclosure of Invention
In order to solve the problems, the application provides an active powder concrete with a large amount of solid waste, which comprises the following raw materials in parts by mass: and (3) cementing materials: 60-100 parts; fly ash: 10-30 parts; silica fume: 1-10 parts; granite sawing mud: 30-60 parts; gold tailings: 80-160 parts; swelling agent: 0.02-0.05 part of high-strength fiber with volume mixing amount of 0.5-2 percent. The method has the characteristics that a large amount of industrial solid waste is doped, the granite saw mud with large specific surface area and certain activity index is adopted to replace ground quartz powder, the characteristic of high strength of gold tailing sand is utilized to replace fine quartz sand as aggregate, a small amount of silica fume fills the granite saw mud and the accumulated pores of a cementing material, and the prepared active powder concrete particles have the advantages of small accumulated porosity, high compactness, low preparation cost, high resource utilization degree of industrial waste, environmental protection, high strength, good external environment erosion resistance, simple preparation method and the like, and are suitable for popularization and application in engineering; the fly ash is doped to partially replace a cementing material, the fluidity and the workability of slurry can be realized, the slurry vibrating process is more favorable for removing bubbles generated in the stirring process, the pouring vibrating process is simpler and more convenient, the test block is more compact, the internal hydration heat release amount is reduced, and the cracking risk is reduced.
Preferably, the feed also comprises the following raw materials in parts by weight: water: 20-30 parts of a solvent; 0.8-2 parts of a water reducing agent.
Preferably, the specific surface area of the silica fume is not less than 20000m2Per kg, the activity index is not less than 85 percent, and the water demand ratio is not less than 120 weight percent;
preferably, the specific surface area of the granite sawn mud is more than 400m2Kg, the average particle size is less than 35 mu m, and the content of impurities is not more than 0.5 wt%; the particle size distribution of the gold tailings is as follows: greater than 0.9mm, 0-3 wt%; less than 75 μm and less than 10 wt%, and the rest particle size distribution is 75 μm-0.9 mm; the apparent density of the gold tailings is not less than 2.6cm3/g, the content of chloride ions is not more than 0.01 wt%, and the content of sulfides and sulfates is not more than 0.5 wt%.
Preferably, the cementitious material is ordinary portland cement or a fast-setting cementitious material.
Preferably, the rapid hardening cementitious material comprises the following raw materials in parts by weight: portland cement: 50-100 parts; fly ash: 10-30 parts; silica fume: 3-10 parts; sulphoaluminate cement: 5-20 parts of a solvent; accelerator: 0.5-2 parts; inorganic early strength agents: 0.5-3 parts; alcamines early strength agent: 0.05-0.1 part; calcium formate: 0.5-2 parts; water reducing agent: 0.3-2 parts of Portland cement and sulphoaluminate cement, which are substantially free of gypsum; the rapid hardening binding material adopts the portland cement clinker as the main binding material, and because the gypsum in the ordinary portland cement is removed from the binding material, the setting rate of the binding material is obviously improved, and the rapid hardening effect can be achieved by adding a trace amount of accelerating agent; and the inorganic early strength agent stimulates the hydration reaction of C3A and C4AF in the cement clinker, the organic early strength agent promotes the hydration reaction of C3S and C2S, the cement clinker and the sulphoaluminate cement mutually promote the hydration reaction, more hydration products are formed in the early stage, the early strength is higher, the internal micro-pores are subjected to silica fume, the compactness of the hardened slurry body is improved, and the higher later strength of the hardened slurry body is ensured.
The specific surface area of the silica fume is not less than 20000m2Per kg, the activity index is not less than 85 percent, and the water demand ratio is less than 120 weight percent;
the accelerator is polyaluminium sulfate, the content of aluminum oxide is higher than 15.6 wt%, and the content of iron is lower than 0.7 wt%;
the inorganic early strength agent is sodium sulfate;
the alcamines early strength agent is one or a combination of more than two of polymeric alcamines, triethanolamine and triisopropanolamine in any proportion;
the water reducing agent is a polycarboxylic acid water reducing agent, and the water reducing rate is not lower than 25%;
the preparation of the rapid hardening cementitious material comprises the following steps:
crushing clinker: crushing the portland cement clinker into particles with the particle size of less than 7mm by a crusher;
grinding the materials: adding weighed silicate cement clinker particles, polyaluminium sulfate, sodium sulfate and alcamines early strength agent into a ball mill, grinding for 25-30min, controlling the material-ball ratio to be 5% +/-0.4%, and controlling the specific surface area of powder obtained by grinding to be 300-400m2Per kg, 80 mu m sieve residue is not more than 4 percent;
mixing and homogenizing materials: adding the ground portland cement clinker, fly ash, silica fume and calcium formate into a mixer for mixing;
the Portland cement is Portland cement clinker and is prepared by the following method: subjecting the initial Portland cement to a rotary kilnTreating, cooling by a grate cooler, and primarily crushing to obtain a material block, wherein the content of F-CaO is less than or equal to 1.5 wt%, and SO3Content is less than or equal to 1.5 wt%, C3The content of A is less than or equal to 6wt percent, C3S and C2The total amount of S is more than or equal to 66 wt%.
Preferably, the water reducing rate of the water reducing agent is not less than 25%; the water reducing agent is a polycarboxylic acid water reducing agent; .
Preferably, the high-strength fiber is surface copper-plated steel fiber, glass fiber, PVA fiber, basalt fiber and the like, the fiber length of the high-strength fiber is 12-15mm, the elastic modulus of the high-strength fiber is not lower than 40GPa, the tensile strength is not lower than 1000MPa, and the ultimate elongation is not lower than 2.0%.
Preferably, the swelling agent is a plastic swelling agent, the average particle diameter is not more than 3.9 μm, and the apparent density is 300-3。
On the other hand, the preparation and use method of the active powder concrete with large mixing amount of solid waste is also disclosed, and comprises the following steps:
mixing materials: weighing the raw materials according to the mixing proportion, firstly pouring the cementing material, the fly ash, the silica fume, the expanding agent, the gold tailings and the dried granite saw mud into a stirrer, dry-mixing for 2 minutes, then pouring water and the high-performance water reducing agent into the stirrer, stirring for 6-8 minutes to form uniformly-mixed slurry, and then uniformly scattering the high-strength fibers in the slurry through a solid feeder, and stirring for 30-60 seconds to obtain the slurry;
molding: loading the slurry into a die from the edge to the middle at one time, slightly vibrating the slurry along the inner wall of the die by using a spatula during loading to enable the slurry to be higher than the upper opening of the die, placing the die on a vibrating table for vibration forming, and continuously discharging the slurry on the surface of the slurry to obtain a primary product;
maintaining and removing the mold: spraying a thin layer of water on the upper surface of the vibrated and molded primary product by using a sprayer, sticking a layer of plastic film, putting the product into a curing room for curing for not less than 36 hours, and demolding to obtain the concrete product.
Preferably, after the form removal through curing, the method further comprises the step of steam curing: and putting the demolded concrete product into a high-temperature steam curing box, and performing steam curing at the temperature of 60-90 ℃ for 36-60 h. The granite saw mud of this application is good with ordinary portland cement and rapid hardening cementitious material's hydration product compatibility, granite saw mud granule and ordinary portland cement hydration product bonding are firm, on the other hand there are a lot of small-size granules in the granite saw mud, small-size granule plays the crystal nucleus effect, in the high temperature evaporates the fostering environment, obviously promote cement hydration reaction, moreover the active index of granite saw mud is higher than quartz powder, produce more hydration products in the high temperature evaporates the fostering environment, test block mechanical strength after evaporating fostering is higher.
This application can bring following beneficial effect:
1. the method has the advantages that the granite saw mud is adopted to completely replace ground quartz powder, part of fine particles are filled in cement stacking pores, and silica fume is added to fill the granite saw mud and cementing material stacking pores, so that the compactness of the prepared active powder concrete is increased, and meanwhile, the granite saw mud is filled among cementing material hydration products, so that the 'needle prick' reinforcing effect is achieved, a large amount of industrial solid wastes are consumed, the use amount of the ground quartz powder is reduced, and the material cost is greatly saved;
2. the fly ash is doped into the mortar to partially replace a cementing material, the fluidity and the workability of the mortar can be realized, the slurry vibrating process is more favorable for removing bubbles generated in the stirring process, the pouring vibrating process is simpler and more convenient, the test block is more compact, the internal hydration heat release amount is reduced, and the cracking risk is reduced;
3. the rapid hardening binding material adopts the portland cement clinker as the main binding material, and because the gypsum in the ordinary portland cement is removed from the binding material, the setting rate of the binding material is obviously improved, and the rapid hardening effect can be achieved by adding a trace amount of accelerating agent; and the C in the cement clinker is excited by the inorganic early strength agent3A and C4AF (with or without requirement) hydration reaction, and organic early strength agent promotes C3S and C2S, hydration reaction is carried out, cement clinker and sulphoaluminate cement mutually promote hydration reaction, more hydration products are formed in the early stage, the early strength is higher, the internal micro-pores are subjected to silica fume, the compactness of the slurry hardened body is improved, and the higher later strength of the slurry hardened body is ensured;
4. the granite saw mud of this application is good with ordinary portland cement and rapid hardening cementitious material's hydration product compatibility, granite saw mud granule and ordinary portland cement hydration product bonding are firm, on the other hand there are a lot of small-size granules in the granite saw mud, small-size granule plays the crystal nucleus effect, in the high temperature evaporates the fostering environment, obviously promote cement hydration reaction, moreover the active index of granite saw mud is higher than quartz powder, produce more hydration products in the high temperature evaporates the fostering environment, test block mechanical strength after evaporating fostering is higher.
Detailed Description
In order to clearly illustrate the technical features of the present solution, the present application will be explained in detail through the following embodiments.
The first embodiment of the present application is an embodiment of a fast-setting cement, which uses the following raw materials:
the fly ash is I-grade fly ash or II-grade fly ash, the water requirement ratio is less than or equal to 95 percent, and other physical and chemical performance indexes meet the requirements of national standard fly ash for cement and concrete (GB/T1596-2017); the specific surface area of the silica fume is not less than 20000m2Per kg, the activity index is not less than 85 percent, and the water demand ratio is less than 120 weight percent; the accelerator is polyaluminium sulfate, the content of aluminum oxide is higher than 15.6 wt%, and the content of iron is lower than 0.7 wt%; the inorganic early strength agent is sodium sulfate; the alcamines early strength agent is one or a combination of more than two of polymeric alcamines, triethanolamine and triisopropanolamine in any proportion; the water reducing agent is a polycarboxylic acid water reducing agent, and the water reducing rate is not lower than 25%; the chemical properties and physical properties of the sulphoaluminate cement meet sulphoaluminate cement (GB 20472-2006).
As for a specific preparation method, a preparation method of the rapid hardening cementitious material comprises the following steps:
s101, Portland cement preparation: treating initial portland cement in a rotary kiln (the production temperature of the conventional portland cement clinker is only required and is generally set at 1450 ℃), cooling the initial portland cement in a grate cooler, and performing primary crushing to obtain a material block, wherein the content of F-CaO is less than or equal to 1.5 wt%, the content of SO3 is less than or equal to 1.5 wt%, the content of C3A is less than or equal to 6 wt%, and the total content of C3S and C2S is more than or equal to 66 wt%;
s102, crushing clinker: crushing the portland cement clinker into particles with the particle size of less than 7mm by a crusher;
s103, material grinding: and (3) weighing the following Portland cement: 50-100 parts; sulphoaluminate cement: 5-20 parts of a solvent; polymeric aluminum sulfate: 0.5-2 parts; sodium sulfate: 0.5-3 parts; alcamines early strength agent: 0.05-0.1 part; water reducing agent: 0.3-2 parts of the powder is added into a ball mill for grinding for 25-30min, the material-ball ratio is controlled to be 5 +/-0.4 percent, the specific surface area of the powder milled out is controlled to be 300 plus or minus 400m2/kg, and the 80 mu m screen residue is not more than 4 percent;
s104, mixing and homogenizing materials: grinding the ground portland cement clinker and fly ash: 10-30 parts; silica fume: 3-10 parts of calcium formate: 0.5-2 parts of the raw materials are added into a mixer for mixing, and the specific materials are shown in table 1;
table 1:
and S105, measuring the initial setting time, the final setting time and the compressive strength of the material obtained in the step S104, wherein specific measurement data are shown in a table 2.
Table 2:
in a second example, relating to the preparation of reactive powder concrete, the following requirements are imposed on the corresponding raw materials: the water reducing rate of the water reducing agent in the embodiment is not less than 25 percent; the water reducing agent is a polycarboxylic acid water reducing agent; the high-strength fiber is surface copper-plated steel fiber, glass fiber, PVA fiber, basalt fiber and the like, the fiber length of the high-strength fiber is 12-15mm, the elastic modulus of the high-strength fiber is not lower than 40GPa, the tensile strength is not lower than 1000MPa, and the ultimate elongation is not lower than 2.0%; the expanding agent is a plastic expanding agent, the average particle size is not more than 3.9 mu m, and the apparent density is 300-600kg/m3(ii) a The specific surface area of the silica fume is not less than 20000m2Kg, activity ofThe sex index is not less than 85 percent, and the water demand ratio is not less than 120 percent by weight; the specific surface area of the granite sawn mud is more than 400m2Kg, the average particle size is less than 35 mu m, and the content of impurities is not more than 0.5 wt%; the particle size distribution of the gold tailings is as follows: greater than 0.9mm, 0-3 wt%; less than 75 μm and less than 10 wt%, and the rest particle size distribution is 75 μm-0.9 mm; the apparent density of the gold tailings is not less than 2.6cm3(ii)/g, the chloride ion content is not more than 0.01 wt%, and the sulfide and sulfate content is not more than 0.5 wt%; the cementing material is ordinary portland cement or a rapid hardening cementing material; the saw mud is detected, and the results are as follows, wherein the results are in percentage by mass:
a preparation and use method of active powder concrete with large amount of solid waste comprises the following steps:
s201, mixing materials: weighing the raw materials according to the mixing ratio, and firstly, preparing the cementing material: 60-100 parts; fly ash: 10-30 parts; silica fume: 1-10 parts; granite sawing mud: 30-60 parts; gold tailings: 80-160 parts; swelling agent: 0.02-0.05 part of high-strength fiber with volume mixing amount of 0.5-2 percent is poured into a stirrer, dry-mixed for 2 minutes, and then the weight ratio of water: 20-30 parts of a solvent; water reducing agent: 0.8-2 parts of the mixture is poured into a stirrer to be stirred for 6-8min to form uniformly mixed slurry, and then the high-strength fibers are uniformly scattered in the slurry through a solid feeder to be stirred for 30-60s to obtain the slurry, wherein the specific materials are shown in Table 3;
table 3:
s202, forming: loading the slurry into a die from the edge to the middle at one time, slightly vibrating the slurry along the inner wall of the die by using a spatula during loading to enable the slurry to be higher than the upper opening of the die, placing the die on a vibrating table for vibration forming, and continuously discharging the slurry on the surface of the slurry to obtain a primary product;
s203, maintaining and removing the mold: spraying a thin layer of water on the upper surface of the vibrated and molded primary product by using a sprayer, sticking a layer of plastic film, putting the product into a curing room for curing for not less than 36 hours, and demolding to obtain the concrete product.
S204, after the mold is maintained and removed, the method further comprises the step of steam maintenance: and putting the demolded concrete product into a high-temperature steam curing box, and performing steam curing at the temperature of 60-90 ℃ for 36-60 h.
S205, the compression strength, the breaking strength and the elastic modulus of the material obtained in the step S104 are shown in Table 4.
Table 4:
| serial number | Compressive strength (MPa) | Flexural strength (MPa) | Modulus of elasticity (GPa) |
| 1 | 104.1 | 34.2 | 38.5 |
| 2 | 112.4 | 35.8 | 40.2 |
| 3 | 135.4 | 40.1 | 41.8 |
| 4 | 107.2 | 32.6 | 39.5 |
| 5 | 126.1 | 38.9 | 41.5 |
| 6 | 147.9 | 42.4 | 42.8 |
| 7 | 106.4 | 32.5 | 37.2 |
| 8 | 121.5 | 37.4 | 40.2 |
| 9 | 103.2 | 35.4 | 37.5 |
| 10 | 72.3 | 26.8 | 35.7 |
| 11 | 111.6 | 30.2 | 32.6 |
| 12 | 112.4 | 32.5 | 33.7 |
| 13 | 140.1 | 40.8 | 41.1 |
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. The active powder concrete with large mixing amount of solid waste is characterized in that: the composite material comprises the following raw materials in parts by weight: and (3) cementing materials: 60-100 parts; fly ash: 10-30 parts; silica fume: 1-10 parts; granite sawing mud: 30-60 parts; gold tailings: 80-160 parts; swelling agent: 0.02-0.05 part of high-strength fiber with volume mixing amount of 0.5-2 percent.
2. The active powder concrete with high solid waste content according to claim 1, which is characterized in that: the material also comprises the following raw materials in parts by weight: water: 20-30 parts of a solvent; 0.8-2 parts of a water reducing agent.
3. The active powder concrete with high solid waste content according to claim 1, which is characterized in that: the specific surface area of the silica fume is not less than 20000m2Per kg, the activity index is not less than 85 percent, and the water demand ratio is not less than 120 weight percent;
the specific surface area of the granite sawn mud is more than 400m2Kg, the average particle size is less than 35 mu m, and the content of impurities is not more than 0.5 wt%; the particle size distribution of the gold tailings is as follows: greater than 0.9mm, 0-3 wt%; less than 75 μm and less than 10 wt%, and the rest particle size distribution is 75 μm-0.9 mm; the apparent density of the gold tailings is not less than 2.6cm3The content of chloride ions is not more than 0.01 wt%, and the content of sulfides and sulfates is not more than 0.5 wt%.
4. The active powder concrete with high solid waste content according to claim 1, which is characterized in that: the cementing material is ordinary portland cement or a quick-hardening cementing material.
5. The active powder concrete with high solid waste content according to claim 4, wherein the concrete is prepared from the following raw materials in percentage by weight: the rapid hardening cementing material comprises the following raw materials in parts by weight: portland cement: 50-100 parts; fly ash: 10-30 parts; silica fume: 3-10 parts; sulphoaluminate cement: 5-20 parts of a solvent; accelerator: 0.5-2 parts; inorganic early strength agents: 0.5-3 parts; alcamines early strength agent: 0.05-0.1 part; calcium formate: 0.5-2 parts; water reducing agent: 0.3-2 parts of Portland cement and sulphoaluminate cement, which are substantially free of gypsum;
the specific surface area of the silica fume is not less than 20000m2Per kg, the activity index is not less than 85 percent, and the water demand ratio is less than 120 weight percent;
the accelerator is polyaluminium sulfate, the content of aluminum oxide is higher than 15.6 wt%, and the content of iron is lower than 0.7 wt%;
the inorganic early strength agent is sodium sulfate;
the alcamines early strength agent is one or a combination of more than two of polymeric alcamines, triethanolamine and triisopropanolamine in any proportion;
the water reducing agent is a polycarboxylic acid water reducing agent, and the water reducing rate is not lower than 25%;
the preparation of the rapid hardening cementitious material comprises the following steps:
crushing clinker: crushing the portland cement clinker into particles with the particle size of less than 7mm by a crusher;
grinding the materials: adding weighed silicate cement clinker particles, polyaluminium sulfate, sodium sulfate and alcamines early strength agent into a ball mill, grinding for 25-30min, controlling the material-ball ratio to be 5% +/-0.4%, and controlling the specific surface area of powder obtained by grinding to be 300-400m2Per kg, 80 mu m sieve residue is not more than 4 percent;
mixing and homogenizing materials: adding the ground portland cement clinker, fly ash, silica fume and calcium formate into a mixer for mixing;
the Portland cement is Portland cement clinker and is prepared by the following method: treating initial portland cement in a rotary kiln, cooling the initial portland cement in a grate cooler, and performing primary crushing to obtain a material block, wherein the content of F-CaO is less than or equal to 1.5 wt%, and SO3Content is less than or equal to 1.5 wt%, C3The content of A is less than or equal to 6wt percent, C3S and C2The total amount of S is more than or equal to 66 wt%.
6. The active powder concrete with high solid waste content as claimed in claim 2, wherein: the water reducing rate of the water reducing agent is not less than 25 percent; the water reducing agent is a polycarboxylic acid water reducing agent; .
7. The active powder concrete with high solid waste content according to claim 1, which is characterized in that: the high-strength fiber is surface copper-plated steel fiber, glass fiber, PVA fiber, basalt fiber and the like, the fiber length of the high-strength fiber is 12-15mm, the elastic modulus of the high-strength fiber is not lower than 40GPa, the tensile strength is not lower than 1000MPa, and the ultimate elongation is not lower than 2.0%.
8. The active powder mixture of high-volume solid waste as claimed in claim 1The concrete is characterized in that: the expanding agent is a plastic expanding agent, the average particle size is not more than 3.9 mu m, and the apparent density is 300-600kg/m3。
9. A preparation and use method of active powder concrete with large mixing amount of solid waste is characterized in that: the method comprises the following steps:
mixing materials: weighing the raw materials according to the mixing proportion, firstly pouring the cementing material, the fly ash, the silica fume, the expanding agent, the gold tailings and the dried granite saw mud into a stirrer, dry-mixing for 2 minutes, then pouring water and the high-performance water reducing agent into the stirrer, stirring for 6-8 minutes to form uniformly-mixed slurry, and then uniformly scattering the high-strength fibers in the slurry through a solid feeder, and stirring for 30-60 seconds to obtain the slurry;
molding: loading the slurry into a die from the edge to the middle at one time, slightly vibrating the slurry along the inner wall of the die by using a spatula during loading to enable the slurry to be higher than the upper opening of the die, placing the die on a vibrating table for vibration forming, and continuously discharging the slurry on the surface of the slurry to obtain a primary product;
maintaining and removing the mold: spraying a thin layer of water on the upper surface of the vibrated and molded primary product by using a sprayer, sticking a layer of plastic film, putting the product into a curing room for curing for not less than 36 hours, and demolding to obtain the concrete product.
10. The preparation and use method of the active powder concrete with high solid waste content according to claim 9 is characterized in that: after the maintenance and the form removal, the method also comprises the following steam maintenance steps: and putting the demolded concrete product into a high-temperature steam curing box, and performing steam curing at the temperature of 60-90 ℃ for 36-60 h.
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| CN202110254701.8A CN112759337A (en) | 2021-03-09 | 2021-03-09 | Active powder concrete with high-content solid waste and preparation and use method thereof |
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| CN202110254701.8A CN112759337A (en) | 2021-03-09 | 2021-03-09 | Active powder concrete with high-content solid waste and preparation and use method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113402231A (en) * | 2021-07-15 | 2021-09-17 | 武汉盛大长青建材有限公司 | Method for producing ready-mixed concrete by using stone saw mud |
| CN114225970A (en) * | 2021-12-14 | 2022-03-25 | 山东山科生态环境研究院有限公司 | Recyclable denitration catalyst carrier and preparation method and application thereof |
| CN115650664A (en) * | 2022-10-19 | 2023-01-31 | 中建商品混凝土有限公司 | Multifunctional environment-friendly ecological concrete and preparation method thereof |
| CN115724638A (en) * | 2022-12-16 | 2023-03-03 | 中建商品混凝土有限公司 | Cementing material prepared from granite saw mud and preparation method of cementing material |
| CN116120003A (en) * | 2022-12-01 | 2023-05-16 | 武大巨成结构股份有限公司 | High-elastic modulus grouting material and preparation method thereof |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107117882A (en) * | 2017-06-09 | 2017-09-01 | 河北建筑工程学院 | A kind of reactive power concrete products and preparation method thereof |
| CN109293301A (en) * | 2018-09-25 | 2019-02-01 | 李鹏宇 | A kind of frost-resistant concrete |
| CN109456018A (en) * | 2019-01-17 | 2019-03-12 | 林瑞云 | Fire-retardant color slime paint modelled after an antique of one kind and preparation method thereof |
| CN109553363A (en) * | 2019-01-17 | 2019-04-02 | 林瑞云 | A kind of emulation stone slab and preparation method thereof |
| CN109678404A (en) * | 2019-01-17 | 2019-04-26 | 林瑞云 | A kind of self-luminous water-permeable brick and preparation method thereof |
| CN109704695A (en) * | 2019-03-01 | 2019-05-03 | 中建材中岩科技有限公司 | Cast-in-place Reactive Powder Concrete of early-strength and preparation method thereof |
| CN110563418A (en) * | 2019-10-30 | 2019-12-13 | 安徽海螺建材设计研究院有限责任公司 | Steam-curing-free ultra-high performance concrete and preparation method thereof |
| CN110668766A (en) * | 2018-07-03 | 2020-01-10 | 中铁建设集团有限公司 | Reactive powder concrete plate slurry and reactive powder concrete plate |
| CN111003989A (en) * | 2019-11-02 | 2020-04-14 | 泗水惠丰农业开发工程有限公司 | Preparation method for preparing granite decorative plate by utilizing granite saw mud |
| CN112047695A (en) * | 2020-09-15 | 2020-12-08 | 江西龙正科技发展有限公司 | Municipal RPC curb material and preparation method thereof |
-
2021
- 2021-03-09 CN CN202110254701.8A patent/CN112759337A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107117882A (en) * | 2017-06-09 | 2017-09-01 | 河北建筑工程学院 | A kind of reactive power concrete products and preparation method thereof |
| CN110668766A (en) * | 2018-07-03 | 2020-01-10 | 中铁建设集团有限公司 | Reactive powder concrete plate slurry and reactive powder concrete plate |
| CN109293301A (en) * | 2018-09-25 | 2019-02-01 | 李鹏宇 | A kind of frost-resistant concrete |
| CN109456018A (en) * | 2019-01-17 | 2019-03-12 | 林瑞云 | Fire-retardant color slime paint modelled after an antique of one kind and preparation method thereof |
| CN109553363A (en) * | 2019-01-17 | 2019-04-02 | 林瑞云 | A kind of emulation stone slab and preparation method thereof |
| CN109678404A (en) * | 2019-01-17 | 2019-04-26 | 林瑞云 | A kind of self-luminous water-permeable brick and preparation method thereof |
| CN109704695A (en) * | 2019-03-01 | 2019-05-03 | 中建材中岩科技有限公司 | Cast-in-place Reactive Powder Concrete of early-strength and preparation method thereof |
| CN110563418A (en) * | 2019-10-30 | 2019-12-13 | 安徽海螺建材设计研究院有限责任公司 | Steam-curing-free ultra-high performance concrete and preparation method thereof |
| CN111003989A (en) * | 2019-11-02 | 2020-04-14 | 泗水惠丰农业开发工程有限公司 | Preparation method for preparing granite decorative plate by utilizing granite saw mud |
| CN112047695A (en) * | 2020-09-15 | 2020-12-08 | 江西龙正科技发展有限公司 | Municipal RPC curb material and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 徐州市科学技术协会: "《低碳经济 绿色发展》", 30 November 2010, 徐州：中国矿业大学出版社 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113402231A (en) * | 2021-07-15 | 2021-09-17 | 武汉盛大长青建材有限公司 | Method for producing ready-mixed concrete by using stone saw mud |
| CN114225970A (en) * | 2021-12-14 | 2022-03-25 | 山东山科生态环境研究院有限公司 | Recyclable denitration catalyst carrier and preparation method and application thereof |
| CN114225970B (en) * | 2021-12-14 | 2023-11-17 | 山东山科生态环境研究院有限公司 | Reusable denitration catalyst carrier and preparation method and application thereof |
| CN115650664A (en) * | 2022-10-19 | 2023-01-31 | 中建商品混凝土有限公司 | Multifunctional environment-friendly ecological concrete and preparation method thereof |
| CN116120003A (en) * | 2022-12-01 | 2023-05-16 | 武大巨成结构股份有限公司 | High-elastic modulus grouting material and preparation method thereof |
| CN115724638A (en) * | 2022-12-16 | 2023-03-03 | 中建商品混凝土有限公司 | Cementing material prepared from granite saw mud and preparation method of cementing material |
| CN115724638B (en) * | 2022-12-16 | 2024-03-15 | 中建商品混凝土有限公司 | Cementing material utilizing granite sawing mud and preparation method thereof |
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