CN114716199A - Method for preparing ultra-high performance concrete by utilizing industrial solid wastes - Google Patents
Method for preparing ultra-high performance concrete by utilizing industrial solid wastes Download PDFInfo
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- CN114716199A CN114716199A CN202210088587.0A CN202210088587A CN114716199A CN 114716199 A CN114716199 A CN 114716199A CN 202210088587 A CN202210088587 A CN 202210088587A CN 114716199 A CN114716199 A CN 114716199A
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- 239000011374 ultra-high-performance concrete Substances 0.000 title claims abstract description 37
- 239000002910 solid waste Substances 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000002699 waste material Substances 0.000 claims abstract description 46
- 239000010881 fly ash Substances 0.000 claims abstract description 32
- 239000004575 stone Substances 0.000 claims abstract description 31
- 239000000843 powder Substances 0.000 claims abstract description 30
- 239000004568 cement Substances 0.000 claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 229910021487 silica fume Inorganic materials 0.000 claims abstract description 24
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000006004 Quartz sand Substances 0.000 claims abstract description 21
- 239000002253 acid Substances 0.000 claims abstract description 17
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 17
- 238000002156 mixing Methods 0.000 claims abstract description 13
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 9
- 239000000835 fiber Substances 0.000 claims abstract description 9
- 239000010959 steel Substances 0.000 claims abstract description 9
- 238000003756 stirring Methods 0.000 claims description 27
- 239000002245 particle Substances 0.000 claims description 24
- 239000002518 antifoaming agent Substances 0.000 claims description 18
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 10
- 229920000570 polyether Polymers 0.000 claims description 10
- 238000010276 construction Methods 0.000 claims description 9
- 238000000227 grinding Methods 0.000 claims description 8
- 239000011435 rock Substances 0.000 claims description 8
- 238000012216 screening Methods 0.000 claims description 8
- 239000010878 waste rock Substances 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 238000007493 shaping process Methods 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 6
- 238000010030 laminating Methods 0.000 claims description 5
- 239000003518 caustics Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 238000012545 processing Methods 0.000 claims description 2
- 239000010802 sludge Substances 0.000 claims description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims 2
- 239000012615 aggregate Substances 0.000 claims 1
- 239000000377 silicon dioxide Substances 0.000 claims 1
- XUGSDIOYQBRKGF-UHFFFAOYSA-N silicon;hydrochloride Chemical compound [Si].Cl XUGSDIOYQBRKGF-UHFFFAOYSA-N 0.000 abstract description 5
- 239000013530 defoamer Substances 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 3
- 238000004064 recycling Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 229920005646 polycarboxylate Polymers 0.000 abstract 1
- 239000008030 superplasticizer Substances 0.000 abstract 1
- 238000001816 cooling Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 238000009440 infrastructure construction Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000007873 sieving Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004574 high-performance concrete Substances 0.000 description 1
- 239000010813 municipal solid waste Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
-
- 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
-
- 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]
-
- 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
Abstract
The invention discloses a method for preparing ultra-high performance concrete by utilizing industrial solid wastes, which relates to the technical field of new materials and comprises the following components in parts by weight: 25-30 parts of P.O52.5 common silicon hydrochloric acid cement, 4-6 parts of silica fume, 2-3 parts of first-grade fly ash, 12-15 parts of quartz sand powder, 7-10 parts of admixture, 18-23 parts of quartz sand, 9-11 parts of waste stone fine aggregate, 6-7 parts of water, 5-7 parts of steel fiber, polycarboxylic acid water reducer and defoamer; the addition amount of the polycarboxylate superplasticizer is 2-4% of the total addition amount of the cement, the silica fume, the fly ash and the admixture, and the addition amount of the defoamer is 0.02-0.05% of the total addition amount of the cement, the silica fume, the fly ash and the admixture. The ultra-high performance concrete prepared by the invention has high solid waste mixing amount and high strength, effectively improves the waste recycling rate and reduces the production cost of the ultra-high performance concrete.
Description
Technical Field
The invention relates to the technical field of new materials, in particular to a method for preparing ultra-high performance concrete by utilizing industrial solid wastes.
Background
Compared with common concrete and high-performance concrete, the ultra-high-performance concrete not only has ultra-high compressive strength, but also has ultra-high flexural strength, tensile strength and other properties, is continuously applied to projects such as bridges, buildings, nuclear power, municipal power, oceans and the like, and is one of the main directions of the development of current cement-based materials.
Under the background of large-scale engineering construction in China, the application of the ultra-high performance concrete in China is more lagged. On the one hand, the application of the ultra-high performance concrete is mainly concentrated in developed countries, and the countries have completed large-scale infrastructure construction, and the market power for promoting the research and application is insufficient; on the other hand, although developing countries have larger requirements for infrastructure construction, the application of the ultra-high performance concrete in engineering is influenced due to insufficient basic research and higher price of the ultra-high performance concrete.
Mine waste rock is selected to replace quartz sand to serve as fine aggregate of the ultra-high performance concrete, and the performance of the ultra-high performance concrete can meet the standard requirement only by selecting high-strength parent rock and low water absorption. The selected mine waste rocks must be crushed and sieved, and the construction waste is crushed and sieved by selecting concrete blocks and broken stone blocks, and then the proper size fraction is selected, so that the product can be prepared according to the proportion of the ultra-high performance concrete.
Disclosure of Invention
Aiming at the problems, the invention aims to provide a method for preparing ultra-high performance concrete by utilizing industrial solid wastes, and aims to solve the technical problems of high construction waste yield, low resource utilization rate and high cost of the ultra-high performance concrete in the prior art.
In order to solve the technical problem, the technical scheme of the utility model is as follows:
a method for preparing ultra-high performance concrete by utilizing industrial solid wastes comprises the following components in parts by weight:
25-30 parts of cement, 4-6 parts of silica fume, 2-3 parts of fly ash, 12-15 parts of quartz sand powder, 7-10 parts of admixture, 18-23 parts of quartz sand, 9-11 parts of waste stone fine aggregate, 6-7 parts of water, 5-7 parts of steel fiber, a polycarboxylic acid water reducing agent and a defoaming agent; the addition amount of the polycarboxylic acid water reducing agent is 2-4% of the total addition amount of the cement, the silica fume, the fly ash and the admixture, and the addition amount of the antifoaming agent is 0.02-0.05% of the total addition amount of the cement, the silica fume, the fly ash and the admixture;
the method for preparing the ultra-high performance concrete by utilizing the industrial solid wastes comprises the following steps:
step 1), separating and crushing mine waste rocks and construction wastes by a centrifugal crusher, shaping and screening waste rock particles with the ranges of 0.63-1.25mm and 1.25-2.5mm as fine aggregate raw materials;
step 2), screening out waste stone powder particles smaller than 0.063mm, warehousing the waste stone powder particles by a powder concentrator, mixing the waste stone powder particles with alkaline residue, fly ash and tailings according to a certain proportion, drying and grinding the mixture to prepare an admixture, and returning the part larger than 2.5mm to the centrifugal crusher for continuous processing;
Step 3), stirring cement, silica fume, fly ash, quartz sand powder and an admixture in a vertical forced stirrer, adding water, stirring for 1min, adding a polycarboxylic acid water reducing agent and a defoaming agent, stirring uniformly, then sequentially adding fine aggregate of waste stone, quartz sand and steel fiber, and stirring for 5-10 min;
and step 4), pouring the slurry into a mould, vibrating to densify, covering a film after the surface is collected for curing for 1d, and transferring the surface to a steam curing box for curing to prepare the ultra-high performance concrete.
Preferably, the cement is P.O52.5 common silicon cement, the speed of the centrifugal crusher is 400-600rpm/min, and the crushing time is 30-60 min.
Preferably, the admixture is prepared by grinding 20-30% of waste stone powder, 5-10% of caustic sludge, 50-55% of fly ash and 5-15% of tailings in percentage by weight.
Preferably, the stirring time in the vertical forced stirrer is 3-10min, and the stirring time for adding the polycarboxylic acid high-performance water reducing agent and the defoaming agent is 5-10 min.
Preferably, the defoamer is a polyether defoamer.
Preferably, the steam curing box is maintained for 2-3 hours, the temperature is increased to 80-95 ℃, the curing is carried out for 48 hours, and the temperature is reduced for 3-4 hours.
After the technical scheme is adopted, the utility model has the beneficial effects that:
1. The invention adopts mine waste stone and building garbage to prepare the fine aggregate meeting the requirement, the solid waste mixing amount is high, and the mixing amount of quartz sand aggregate is reduced.
2. The compressive strength of the ultra-high performance concrete prepared by the invention reaches 120MPa, the flexural strength is more than 15MPa, the tensile strength is more than 5MPa, the elastic modulus is more than 40GPa, the expansion degree is more than or equal to 600mm, and the rewinding time is less than or equal to 12 s.
3. The invention collects the screened powder and grinds the powder with the industrial solid waste alkaline residue, the fly ash and the tailings to prepare the admixture which replaces part of cement, silica fume and quartz sand powder, thereby reducing the cost and realizing the recycling of resources.
In conclusion, the invention effectively reduces the production cost, reduces the pollution of industrial solid wastes to the environment and achieves the effect of resource recycling.
Detailed Description
The method for preparing ultra-high performance concrete using industrial solid wastes according to the present invention will be described in detail with reference to the following examples, but they should not be construed as limiting the scope of the present invention. In the present invention, all the starting materials for the preparation are commercially available products known to those skilled in the art, unless otherwise specified.
Example 1
Separating and crushing mine waste rocks and construction waste for 30min at 400rpm/min by a centrifugal crusher, shaping and screening to screen waste rock particles with the particle sizes of 0.63-1.25mm and 1.25-2.5mm as fine aggregate raw materials; putting waste stone particles with the particle size of less than 0.63mm into a warehouse through a powder concentrator, mixing 30% of waste stone powder, 5% of alkaline residue, 55% of fly ash and 10% of tailings according to weight percentage, drying and grinding to prepare admixture; stirring 26 parts of P.O52.5 common silicon hydrochloric acid cement, 6 parts of silica fume, 3 parts of fly ash, 12 parts of quartz sand powder and 10 parts of admixture in a vertical forced stirrer for 5min, uniformly mixing, adding 7 parts of water, stirring for 1min, adding a polycarboxylic acid water reducing agent, wherein the addition amount of the polycarboxylic acid water reducing agent is 2% of the total addition amount of the cement, the silica fume, the fly ash and the admixture, then adding a polyether defoaming agent, the addition amount of the polyether defoaming agent is 0.02 per mill of the total addition amount of the cement, the silica fume, the fly ash and the admixture, stirring for 5min, adding 5.5 parts of 0.63-1.25mm waste stone fine aggregate, 4.5 parts of 1.25-2.5mm waste stone fine aggregate, 19 parts of quartz sand and 7 parts of steel fiber, and stirring for 6 min; pouring the slurry into a mould, vibrating to densify, laminating and curing for 1d after face collection, transferring into a steam curing box for curing, heating to 90 ℃ within 2.5h, curing for 48h, and cooling for 4h to obtain the ultra-high performance concrete.
The compressive strength of the ultra-high performance concrete prepared by the invention reaches 120MPa, the breaking strength is 17MPa, the tensile strength is 5MPa, the elastic modulus is 42GPa, the expansion degree is 610mm, and the rewinding time is 11 s.
Example 2
Separating and crushing mine waste rocks and construction waste for 40min at 450 rpm/min by a centrifugal crusher, shaping and screening to screen waste rock particles with the particle sizes of 0.63-1.25mm and 1.25-2.5mm as fine aggregate raw materials; putting waste stone particles with the particle size of less than 0.63mm into a warehouse through a powder concentrator, mixing 25% of waste stone powder, 10% of alkaline residue, 50% of fly ash and 15% of tailings according to weight percentage, drying and grinding to prepare admixture; stirring 26 parts of P.O 52.5 common silicon hydrochloric acid cement, 5 parts of silica fume, 2.5 parts of fly ash, 13.5 parts of quartz sand powder and 8 parts of adhesive admixture in a vertical forced stirrer for 5min, uniformly mixing, adding 6 parts of water, stirring for 1min, adding a polycarboxylic acid water reducing agent, wherein the addition amount of the polycarboxylic acid water reducing agent is 2.8 percent of the total addition amount of the cement, the silica fume, the fly ash and the admixture, then adding a polyether defoaming agent, the addition amount of the polyether defoaming agent is 0.02 per thousand of the total addition amount of the cement, the silica fume, the fly ash and the admixture, stirring for 8min, adding 6 parts of 0.63-1.25mm waste stone fine aggregate, 5 parts of 1.25-2.5mm waste stone fine aggregate, 21 parts of quartz sand and 7 parts of steel fiber, and stirring for 7 min; pouring the slurry into a mould, vibrating to densify, laminating and curing for 1d after face collection, transferring into a steam curing box for curing, heating to 92 ℃ for 3h, curing for 48h, and cooling for 3h to obtain the ultra-high performance concrete.
The compression strength of the ultra-high performance concrete prepared by the invention reaches 120MPa, the breaking strength is 16MPa, the tensile strength is 6MPa, the elastic modulus is 41GPa, the expansion degree is 620mm, and the rewinding time is 12 s.
Example 3
Separating and crushing mine waste rocks and construction wastes for 50min at 500 rpm/min by a centrifugal crusher, shaping, sieving, and screening waste rock particles with particle sizes of 0.63-1.25mm and 1.25-2.5mm as fine aggregate raw materials; putting waste stone particles with the particle size of less than 0.63mm into a warehouse through a powder concentrator, mixing 23% of waste stone powder, 7% of alkaline residue, 55% of fly ash and 15% of tailings according to weight percentage, drying and grinding to prepare admixture; stirring 27 parts of P.O 52.5 common silicon hydrochloric acid cement, 5 parts of silica fume, 3 parts of fly ash, 14 parts of quartz sand powder and 7 parts of admixture in a vertical forced stirrer for 6min, uniformly mixing, adding 6 parts of water, stirring for 1min, adding a polycarboxylic acid water reducing agent, wherein the addition amount of the polycarboxylic acid water reducing agent is 3% of the total addition amount of the cement, the silica fume, the fly ash and the admixture, then adding a polyether defoaming agent, the addition amount of the polyether defoaming agent is 0.03% of the total addition amount of the cement, the silica fume, the fly ash and the admixture, stirring for 8min, adding 4.8 parts of 0.63-1.25mm waste stone fine aggregate, 4.2 parts of 1.25-2.5mm waste stone fine aggregate, 23 parts of quartz sand and 6 parts of steel fiber, and stirring for 8 min; pouring the slurry into a mould, vibrating to densify, laminating and curing for 1d after face collection, transferring into a steam curing box for curing, heating to 90 ℃ for 3h, curing for 48h, and cooling for 3.5h to obtain the ultra-high performance concrete.
The compression strength of the ultra-high performance concrete prepared by the invention reaches 120MPa, the breaking strength is 17MPa, the tensile strength is 6MPa, the elastic modulus is 42GPa, the expansion degree is 620mm, and the rewinding time is 12 s.
Example 4
Separating and crushing mine waste rocks and construction wastes for 60min at 600 rpm/min by a centrifugal crusher, shaping, sieving, and screening waste rock particles with particle sizes of 0.63-1.25mm and 1.25-2.5mm as fine aggregate raw materials; putting waste stone particles with the particle size of less than 0.63mm into a warehouse through a powder concentrator, mixing 28% of waste stone powder, 7% of alkaline residue, 52% of fly ash and 13% of tailings according to weight percentage, drying and grinding to prepare admixture; stirring 30 parts of P.O 52.5 common silicon hydrochloric acid cement, 6 parts of silica fume, 3 parts of fly ash, 13 parts of quartz sand powder and 9 parts of admixture in a vertical forced stirrer for 10min, uniformly mixing, adding 6 parts of water, stirring for 1min, adding a polycarboxylic acid water reducing agent, wherein the addition amount of the polycarboxylic acid water reducing agent is 4% of the total addition amount of the cement, the silica fume, the fly ash and the admixture, then adding a polyether defoaming agent, the addition amount of the polyether defoaming agent is 0.05% of the total addition amount of the cement, the silica fume, the fly ash and the admixture, stirring for 9min, adding 5.5 parts of 0.63-1.25mm waste stone fine aggregate, 4.5 parts of 1.25-2.5mm waste stone fine aggregate, 18 parts of quartz sand and 5 parts of steel fiber, and stirring for 8 min; pouring the slurry into a mould, vibrating to densify, laminating and curing for 1d after face collection, transferring into a steam curing box for curing, heating to 95 ℃ for 3h, curing for 48h, and cooling for 3.5h to obtain the ultra-high performance concrete.
The compressive strength of the ultra-high performance concrete prepared by the invention reaches 120MPa, the breaking strength is 16MPa, the tensile strength is 6MPa, the elastic modulus is 42GPa, the expansion degree is 620mm, and the rewinding time is 12 s.
Claims (6)
1. The method for preparing the ultra-high performance concrete by using the industrial solid wastes comprises the following components in parts by weight:
25-30 parts of cement, 4-6 parts of silica fume, 2-3 parts of first-grade fly ash, 12-15 parts of quartz sand powder, 7-10 parts of admixture, 18-23 parts of quartz sand, 9-11 parts of waste stone fine aggregate, 6-7 parts of water, 5-7 parts of steel fiber, polycarboxylic acid water reducing agent, wherein the addition amount of the polycarboxylic acid water reducing agent is 2-4% of the total addition amount of the cement, the silica fume, the fly ash and the admixture, and defoaming agent, and the addition amount of the defoaming agent is 0.02-0.05 per thousand of the total addition amount of the cement, the silica fume, the fly ash and the admixture; the method for preparing the ultra-high performance concrete by using the industrial solid wastes is characterized by comprising the following steps:
step 1), separating and crushing mine waste rocks and construction waste by a centrifugal crusher, shaping and screening waste rock particles in the range of 0.63-1.25mm and 1.25-2.5mm as fine aggregate raw materials;
step 2), screening out waste stone powder particles smaller than 0.063mm, warehousing the waste stone powder particles by a powder concentrator, mixing the waste stone powder particles with alkaline residue, fly ash and tailings according to a certain proportion, drying and grinding the mixture to prepare an admixture, and returning the part larger than 2.5mm to the centrifugal crusher for continuous processing;
Step 3), stirring cement, silica fume, fly ash, quartz sand powder and an admixture in a vertical forced stirrer, adding water, stirring for 1min, adding a polycarboxylic acid water reducing agent and a defoaming agent, stirring uniformly, then sequentially adding waste stone fine aggregate, quartz sand and steel fiber, and stirring for 5-10 min;
and 4) pouring the slurry into a mould, vibrating to densify, laminating and curing for 1d after the surface is collected, and transferring to a steam curing box for curing to prepare the ultra-high performance concrete.
2. The method for preparing ultra-high performance concrete by using industrial solid wastes as claimed in claim 1, wherein in the step 1, the cement is P.O52.5 ordinary silica hydrochloric acid cement, the speed of the centrifugal crusher is 400-600rpm/min, and the crushing time is 30-60 min.
3. The method for preparing ultra-high performance concrete by using industrial solid wastes according to claim 1, wherein in the step 2, the admixture is prepared by grinding 20-30% by weight of waste stone powder, 5-10% by weight of caustic sludge, 50-55% by weight of fly ash and 5-15% by weight of tailings.
4. The method for preparing ultra-high performance concrete by using industrial solid wastes according to claim 1, wherein in the step 3, the stirring time in the vertical forced mixer is 3-10min, and the polycarboxylic acid water reducing agent and the defoaming agent are added for 5-10 min.
5. The method for preparing ultra-high performance concrete using industrial solid wastes according to claim 1, wherein in the step 3, the antifoaming agent is a polyether antifoaming agent.
6. The method for preparing the ultra-high performance concrete by using the industrial solid wastes as claimed in claim 1, wherein in the step 4, the steam curing box is maintained for 2-3 hours, the temperature is raised to 80-95 ℃, the curing is carried out for 48 hours, and the temperature is lowered for 3-4 hours.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210088587.0A CN114716199A (en) | 2022-01-26 | 2022-01-26 | Method for preparing ultra-high performance concrete by utilizing industrial solid wastes |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115504749A (en) * | 2022-10-20 | 2022-12-23 | 南通装配式建筑与智能结构研究院 | Ultra-high performance concrete and preparation method thereof |
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2022
- 2022-01-26 CN CN202210088587.0A patent/CN114716199A/en active Pending
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| CN102408199A (en) * | 2011-08-10 | 2012-04-11 | 青岛建一新材料科技有限公司 | Method for preparing active admixture for concrete and cement by building waste |
| CN103288400A (en) * | 2013-06-05 | 2013-09-11 | 淮阴工学院 | Concrete containing alkali residue as admixture and preparation method thereof |
| CN110526640A (en) * | 2019-08-07 | 2019-12-03 | 山东大元实业股份有限公司 | A kind of ultra-high performance concrete and preparation method thereof using solid-state castoff production |
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| CN115504749A (en) * | 2022-10-20 | 2022-12-23 | 南通装配式建筑与智能结构研究院 | Ultra-high performance concrete and preparation method thereof |
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Application publication date: 20220708 |