CN116239348A - High-strength concrete and preparation process thereof - Google Patents
High-strength concrete and preparation process thereof Download PDFInfo
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- CN116239348A CN116239348A CN202310021228.8A CN202310021228A CN116239348A CN 116239348 A CN116239348 A CN 116239348A CN 202310021228 A CN202310021228 A CN 202310021228A CN 116239348 A CN116239348 A CN 116239348A
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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
- C04B28/04—Portland 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
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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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
- C04B18/10—Burned or pyrolised refuse
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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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/141—Slags
- C04B18/145—Phosphorus slags
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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
- C04B28/18—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 mixtures of the silica-lime type
- C04B28/186—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 mixtures of the silica-lime type containing formed Ca-silicates before the final hardening step
- C04B28/188—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 mixtures of the silica-lime type containing formed Ca-silicates before the final hardening step the Ca-silicates being present in the starting mixture
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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]
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- 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 application relates to high-strength concrete and a preparation process thereof, wherein the high-strength concrete comprises the following raw materials in parts by mass: 240-280 parts of cement, 820-860 parts of river sand, 410-450 parts of cobble, 3-5 parts of water reducer, 90-110 parts of water, 50-70 parts of steel fiber, 80-90 parts of composite industrial waste residues, wherein the composite industrial waste residues comprise phosphorus slag, alkali slag and coal slag. The concrete prepared by the method takes the phosphorus slag as one of the raw materials and has good strength performance.
Description
Technical Field
The application relates to the technical field of concrete preparation, in particular to high-strength concrete and a preparation process thereof.
Background
Concrete is one of the most prominent civil engineering materials in the current generation; the artificial stone is prepared from cementing material, granular aggregate, water, and additive and admixture added if necessary according to a certain proportion, and is prepared by uniformly stirring, compacting, shaping, curing and hardening. With the development of urban construction, the requirements on the concrete performance are also increasing. In particular, more concrete required for engineering construction is required to have higher strength and more excellent durability, and for this reason, high-strength concrete has been developed.
The phosphorus slag is an industrial waste slag discharged during the production of yellow phosphorus by an electric furnace method. The production of 1t yellow phosphorus discharges 8-12 t phosphorus slag, millions of tons of waste slag are discharged each year in China, and if the phosphorus slag is piled up for a long time, a large amount of land is occupied and the environment is polluted. Therefore, the high-strength concrete which adopts the phosphorus slag to replace a part of fine aggregate or cement in the concrete is designed, and has better practical significance.
Disclosure of Invention
In order to prepare concrete with high strength performance by taking phosphorus slag as one of raw materials, the application provides high-strength concrete and a preparation process thereof.
In a first aspect, the present application provides a high strength concrete, which adopts the following technical scheme:
the high-strength concrete comprises the following raw materials in parts by weight: 240-280 parts of cement, 820-860 parts of river sand, 410-450 parts of cobble, 3-5 parts of water reducer, 90-110 parts of water, 50-70 parts of steel fiber, 80-90 parts of composite industrial waste residues, wherein the composite industrial waste residues comprise phosphorus slag, alkali slag and coal slag.
The concrete produced according to the formula has higher strength and good actual use effect, and the concrete proposal is analyzed as follows:
firstly, the steel fibers have a toughening effect, when the steel fibers are added into the concrete, the steel fibers are distributed in a disordered direction in the concrete and are mutually overlapped, a reinforcement effect is achieved, and the strength of the concrete is effectively improved.
Further, the phosphorus slag, the alkali slag and the coal slag contain a calcium source and an aluminum source, the calcium source can form gel materials in the system, the compactness and the pore structure of the system are effectively optimized, the aluminum source can form aluminum hydroxide colloid in the system, the aluminum hydroxide colloid effectively fills the pore structure in the system, the porosity of the system is reduced, and therefore the strength of the concrete is further enhanced. Meanwhile, the phosphorus slag, the alkali slag and the coal slag belong to industrial waste residues, and the addition amount of cement and aggregate in concrete can be reduced to a certain extent when the phosphorus slag, the alkali slag and the coal slag are added into the system, so that the production cost is effectively reduced, the reutilization of the industrial waste residues is realized, and the environment-friendly idea is realized.
However, the phosphorous slag has a low activity. The alkaline residue contains calcium chloride, and the calcium chloride can enable the phosphorus residue cement slurry to form hydrocalumite, so that the activity of the phosphorus residue cement can be increased; the cinder contains aluminum sulfate, and aluminum ions and sulfate ions can instantaneously react with dissolved calcium ions to generate a large amount of hydroxy calcite and ettringite, so that the activity of the phosphorus cinder is stimulated, and the phosphorus cinder can better participate in the system reaction. Therefore, the alkaline residue and the coal residue have synergistic interaction, and the active effect of increasing the activity of the phosphorus residue is one plus one to be more than two.
In addition, the hydrocalumite generated by the calcium chloride and the hydroxycalcite and ettringite generated by the aluminum sulfate can be effectively filled in the gelation pores of the system, so that the microstructure and the porosity in the system are effectively improved, and the method has positive significance for improving the strength of the concrete.
Preferably, the mass ratio of the phosphorus slag to the alkali slag to the coal slag is 1 (0.4-0.8) to 1.3-1.5.
Preferably, the length of the steel fiber is 14-18mm, and the diameter is 0.2-0.4mm.
Preferably, the average grain size of the river sand is 1.5-2mm, and the average grain size of the stones is 8-12mm.
Preferably, the average grain size of the phosphorus slag is 2-3mm, the average grain size of the alkali slag is 50-60 mu m, and the average grain size of the coal slag is 1-1.5mm.
By adopting the cement, river sand, stones, phosphorus slag, alkali slag and coal slag with the average particle size range, the close accumulation with a larger degree can be realized, the system is more uniform and compact, the system porosity can be effectively reduced, and the strength of the concrete is further improved.
Preferably, the concrete raw material also comprises 15-30 parts of nano silicon dioxide solution.
Because the chloride ion content in the alkaline residue is higher, the corrosion of the steel bar structure is easy to accelerate after the steel bar structure is poured by the concrete.
When free chloride ions of the system are dissolved out, the pore structure of the system may become loose, so that the porosity of the system is increased, at the moment, the nano silicon dioxide solution is added into the system, the nano silicon dioxide solution molecules not only can further fill the pores, but also can be combined with calcium hydroxide to generate C-S-H gel, so that the free chloride ions in the pores can be effectively combined through the nano silicon dioxide solution molecules, and the content of the free chloride ions in the system is further reduced through chlorine fixation and chlorine sealing.
Preferably, the concentration of the nano silicon dioxide solution is 2-6%, and the average particle size of the nano silicon dioxide is 8-12nm.
On the other hand, the preparation process of the high-strength concrete provided by the application adopts the following technical scheme:
a preparation process of high-strength concrete comprises the following steps:
mixing cement, river sand, stone, water reducing agent, water, steel fiber and composite industrial waste residue, and stirring uniformly to obtain the concrete.
Mixing cement, river sand, stone, water reducing agent, water, steel fiber and composite industrial waste residue, and stirring uniformly to obtain the concrete.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the phosphorus slag, the alkali slag and the coal slag are added into the concrete, so that the strength of the concrete can be enhanced. Meanwhile, the phosphorus slag, the alkali slag and the coal slag belong to industrial waste residues, and the addition amount of cement and aggregate in concrete can be reduced to a certain extent when the phosphorus slag, the alkali slag and the coal slag are added into the system, so that the production cost is effectively reduced, the reutilization of the industrial waste residues is realized, and the environment-friendly idea is met. In addition, the alkaline residue and the coal residue can improve the activity of the phosphorous residue, and the alkaline residue and the coal residue have a synergistic interaction effect, and the active effect of adding one to more than two to improve the activity of the phosphorous residue is achieved.
2. The nano silicon dioxide solution is added into the system, so that not only can the pores in the system be filled, but also the nano silicon dioxide solution can be combined with calcium hydroxide to generate C-S-H gel, thereby being capable of effectively combining free chloride ions in the pores, further effectively reducing the content of the free chloride ions in the system and effectively reducing the corrosion of the reinforced structure after the reinforced structure is poured by concrete.
Detailed Description
The embodiment of the application discloses high-strength concrete and a preparation process thereof.
Example 1
The concrete comprises the following raw materials by weight: 2600g of cement, 8400g of river sand, 4300g of stone, 40g of water reducing agent, 1000g of water, 600g of steel fiber and 850g of composite industrial waste residue.
The preparation process of the concrete comprises the following steps:
mixing cement, river sand, stone, water reducing agent, water, steel fiber and composite industrial waste residue, and stirring uniformly to obtain the concrete.
Wherein the model of the cement is PO42.5, the average grain diameter of the river sand is 1.8mm, and the average grain diameter of the stones is 10mm; the water reducer is a polycarboxylate water reducer; the length of the steel fiber is 16mm, and the diameter of the steel fiber is 0.3mm; the composite industrial waste residue comprises phosphorus slag, alkali slag and coal slag, and the mass ratio of the phosphorus slag to the alkali slag to the coal slag is 1:0.6:1.4.
Example 2
The concrete comprises the following raw materials by weight: 2400g of cement, 8200g of river sand, 4100g of stone, 30g of water reducer, 900g of water, 500g of steel fiber and 800g of composite industrial waste residue.
The preparation process of the concrete comprises the following steps:
mixing cement, river sand, stone, water reducing agent, water, steel fiber and composite industrial waste residue, and stirring uniformly to obtain the concrete.
Wherein the model of the cement is PO42.5, the average grain diameter of the river sand is 1.5mm, and the average grain diameter of the stones is 8mm; the water reducer is a polycarboxylate water reducer; the length of the steel fiber is 14mm, and the diameter of the steel fiber is 0.2mm; the composite industrial waste residue comprises phosphorus slag, alkali slag and coal slag, and the mass ratio of the phosphorus slag to the alkali slag to the coal slag is 1:0.4:1.5.
Example 3
The concrete comprises the following raw materials by weight: 2800g of cement, 8600g of river sand, 4500g of stone, 50g of water reducer, 1100g of water, 700g of steel fiber and 900g of composite industrial waste residue.
The preparation process of the concrete comprises the following steps:
mixing cement, river sand, stone, water reducing agent, water, steel fiber and composite industrial waste residue, and stirring uniformly to obtain the concrete.
Wherein the model of the cement is PO42.5, the average grain diameter of the river sand is 2mm, and the average grain diameter of the stone is 12mm; the water reducer is a polycarboxylate water reducer; the length of the steel fiber is 18mm, and the diameter of the steel fiber is 0.4mm; the composite industrial waste residue comprises phosphorus slag, alkali slag and coal slag, and the mass ratio of the phosphorus slag to the alkali slag to the coal slag is 1:0.8:1.3.
Example 4
Example 4 differs from example 1 in that: the mass ratio of the phosphorus slag to the alkali slag to the coal slag is 1:0.3:1.4.
Example 5
Example 5 differs from example 1 in that: the mass ratio of the phosphorus slag to the alkali slag to the coal slag is 1:0.9:1.4.
Example 6
Example 6 differs from example 1 in that: the mass ratio of the phosphorus slag to the alkali slag to the coal slag is 1:0.6:1.1.
Example 7
Example 7 differs from example 1 in that: the mass ratio of the phosphorus slag to the alkali slag to the coal slag is 1:0.6:1.7.
Example 8
The concrete comprises the following raw materials by weight: 2600g of cement, 8400g of river sand, 4300g of stone, 40g of water reducer, 1000g of water, 600g of steel fiber, 850g of composite industrial waste residue and 230g of nano silicon dioxide solution.
The preparation process of the concrete comprises the following steps:
s1, adding nano silicon dioxide into ethanol, and uniformly stirring to obtain a nano silicon dioxide solution;
s2, mixing cement, river sand, stones, a water reducer, water, steel fibers, composite industrial waste residues and nano silicon dioxide solution, and uniformly stirring to obtain the concrete.
Wherein the model of the cement is PO42.5, the average grain diameter of the river sand is 1.8mm, and the average grain diameter of the stones is 10mm; the water reducer is a polycarboxylate water reducer; the length of the steel fiber is 16mm, and the diameter of the steel fiber is 0.3mm; the composite industrial waste residue comprises phosphorus slag, alkali slag and coal slag, wherein the mass ratio of the phosphorus slag to the alkali slag to the coal slag is 1:0.6:1.4; the concentration of the nano silica solution was 4% and the average particle size of the nano silica was 10nm.
Example 9
Example 9 differs from example 8 in that: the concentration of the nano-silica solution was 2%, and the average particle diameter of the nano-silica was 8nm.
Example 10
Example 10 differs from example 8 in that: the concentration of the nano-silica solution was 6, and the average particle diameter of the nano-silica was 12nm.
Comparative example 1
Comparative example 1 and example 1 differ in that: composite industrial waste residues are not added in the concrete.
Comparative example 2
Comparative example 2 and example 1 differ in that: the composite industrial waste residue only contains phosphorus slag.
Comparative example 3
Comparative example 3 and example 1 differ in that: and phosphorus slag and alkaline slag in the composite industrial waste slag.
Comparative example 4
Comparative example 4 and example 1 differ in that: and phosphorus slag and coal slag in the composite industrial waste slag.
And (3) performance detection:
sampling: the concrete prepared in examples 1 to 10 and comparative examples 1 to 4 was taken as a test sample, and after curing for 28 days, detection was performed. The test specimens were cubic standard specimens of 150 mm. Times.150 mm.
Strength performance test: the compressive strength of the samples was tested according to GB/T50081-2019 method of concrete physical mechanical property test method standard, and the test results were recorded in Table 1.
| Sample of | Compressive strength (MPa) for 28 days |
| Example 1 | 54.6 |
| Example 2 | 54.3 |
| Example 3 | 54.4 |
| Example 4 | 51.6 |
| Example 5 | 52.1 |
| Example 6 | 52.3 |
| Example 7 | 51.9 |
| Example 8 | 57.6 |
| Example 9 | 57.2 |
| Example 10 | 57.3 |
| Comparative example 1 | 55.1 |
| Comparative example 2 | 43.2 |
| Comparative example 3 | 48.6 |
| Comparative example 4 | 48.4 |
Data analysis
From a specific combination of the test results of examples 1 to 3 and comparative example 1, the compressive strength of examples 1 to 3 was 54.3 to 54.6MPa, and the compressive strength of comparative example 1 was 55.1MPa, so that it can be seen that the compressive strength of examples 1 to 3 was superior to that of comparative example 1, and the analysis was as follows: examples 1-3 differ from comparative example 1 in that: the composite industrial waste residue is added in the concrete, so that the fact that the composite industrial waste residue is added in the concrete is verified, the recycling of the industrial waste residue is realized, the environment-friendly concept is met, and the influence on the strength performance of the concrete is small.
From a specific combination of the test results of examples 1 to 3 and comparative example 2, the compressive strength of examples 1 to 3 was 54.3 to 54.6MPa, and the compressive strength of comparative example 2 was 43.2MPa, so that it can be seen that the compressive strength of examples 1 to 3 was superior to that of comparative example 2, and the analysis was as follows: examples 1-3 differ from comparative example 2 in that: in addition to the phosphorus slag, the composite industrial waste slag added in the concrete is also added with the alkali slag and the coal slag, so that the activity of the phosphorus slag can be enhanced by the alkali slag and the coal slag, and the positive significance of the phosphorus slag added in the concrete on the strength performance of the concrete is improved.
From a specific combination of the test results of examples 1-3 and comparative example 3, the compressive strength of examples 1-3 was 54.3-54.6MPa, and the compressive strength of comparative example 3 was 48.6MPa, so that it can be seen that the compressive strength of examples 1-3 was superior to that of comparative example 3, and the analysis was as follows: examples 1-3 differ from comparative example 3 in that: the composite industrial waste residue added in the concrete is added with the cinder in addition to the phosphorus residue and the alkali residue, so that the synergistic interaction between the alkali residue and the cinder is verified, the active effect of adding one to be more than two on the activity of the phosphorus residue is improved, and the active effect of adding the phosphorus residue in the concrete on the strength performance of the concrete is further improved.
From a specific combination of the test results of examples 1-3 and comparative example 4, the compressive strength of examples 1-3 was 54.3-54.6MPa, and the compressive strength of comparative example 4 was 48.4MPa, so that it can be seen that the compressive strength of examples 1-3 was superior to that of comparative example 4, and the analysis was as follows: examples 1-3 differ from comparative example 4 in that: the composite industrial waste residue added in the concrete is added with the alkaline residue besides the phosphorous residue and the coal residue, so that the synergistic interaction between the alkaline residue and the coal residue is verified, the active effect of adding one to more than two for improving the activity of the phosphorous residue is achieved, and the active effect of adding the phosphorous residue in the concrete on the strength performance of the concrete is further improved.
The present embodiment is merely illustrative of the present application, and the present application is not limited thereto, and a worker can make various changes and modifications without departing from the scope of the technical idea of the present application. The technical scope of the present application is not limited to the contents of the specification, and must be determined according to the scope of claims.
Claims (8)
1. A high strength concrete, characterized by: the material comprises the following raw materials in parts by weight: 240-280 parts of cement, 820-860 parts of river sand, 410-450 parts of cobble, 3-5 parts of water reducer, 90-110 parts of water, 50-70 parts of steel fiber, 80-90 parts of composite industrial waste residues, wherein the composite industrial waste residues comprise phosphorus slag, alkali slag and coal slag.
2. A high strength concrete according to claim 1, wherein: the mass ratio of the phosphorus slag to the alkali slag to the coal slag is 1 (0.4-0.8) to 1.3-1.5.
3. A high strength concrete according to claim 1, wherein: the length of the steel fiber is 14-18mm, and the diameter is 0.2-0.4mm.
4. A high strength concrete according to claim 1, wherein: the average grain diameter of the river sand is 1.5-2mm, and the average grain diameter of the stones is 8-12mm.
5. The high strength concrete according to claim 4, wherein: the average grain diameter of the phosphorus slag is 2-3mm, the average grain diameter of the alkaline slag is 50-60 mu m, and the average grain diameter of the coal slag is 1-1.5mm.
6. A high strength concrete according to claim 1, wherein: the concrete raw material also comprises 15-30 parts of nano silicon dioxide solution.
7. A high strength concrete according to claim 6, wherein: the concentration of the nano silicon dioxide solution is 2-6%, and the average particle size of the nano silicon dioxide is 8-12nm.
8. The process for preparing high-strength concrete according to claim 1, wherein: the method comprises the following steps:
mixing cement, river sand, stone, water reducing agent, water, steel fiber and composite industrial waste residue, and stirring uniformly to obtain the concrete.
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| AU2020101096A4 (en) * | 2020-06-23 | 2020-07-23 | Qian’an Weisheng Solid Waste Environmental Protection Industrial co., LTD | The Preparation Method of Steel Fiber Reinforced Ultra-high Performance Concrete by Synergistic Utilization of Multi-solid Waste |
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