CN115710115A - All-coal gangue high-performance concrete and preparation method thereof - Google Patents
All-coal gangue high-performance concrete and preparation method thereof Download PDFInfo
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- CN115710115A CN115710115A CN202211512192.5A CN202211512192A CN115710115A CN 115710115 A CN115710115 A CN 115710115A CN 202211512192 A CN202211512192 A CN 202211512192A CN 115710115 A CN115710115 A CN 115710115A
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- 239000003245 coal Substances 0.000 title claims abstract description 135
- 239000004574 high-performance concrete Substances 0.000 title claims abstract description 46
- 238000002360 preparation method Methods 0.000 title claims abstract description 38
- 239000000463 material Substances 0.000 claims abstract description 33
- 239000012744 reinforcing agent Substances 0.000 claims abstract description 29
- 239000002131 composite material Substances 0.000 claims abstract description 28
- 229920000876 geopolymer Polymers 0.000 claims abstract description 25
- 239000004568 cement Substances 0.000 claims abstract description 18
- 239000000843 powder Substances 0.000 claims abstract description 16
- 239000005995 Aluminium silicate Substances 0.000 claims abstract description 9
- 235000012211 aluminium silicate Nutrition 0.000 claims abstract description 9
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000002245 particle Substances 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims description 29
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 12
- 229910052782 aluminium Inorganic materials 0.000 claims description 12
- 238000001354 calcination Methods 0.000 claims description 12
- 238000013461 design Methods 0.000 claims description 12
- 238000001994 activation Methods 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 9
- 229910000323 aluminium silicate Inorganic materials 0.000 claims description 7
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 7
- 235000007164 Oryza sativa Nutrition 0.000 claims description 6
- 239000000945 filler Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 235000019353 potassium silicate Nutrition 0.000 claims description 6
- 235000009566 rice Nutrition 0.000 claims description 6
- 238000012216 screening Methods 0.000 claims description 6
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 6
- 238000009736 wetting Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 229910021487 silica fume Inorganic materials 0.000 claims description 5
- 240000007594 Oryza sativa Species 0.000 claims 1
- 239000004567 concrete Substances 0.000 abstract description 17
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 7
- 239000011707 mineral Substances 0.000 abstract description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 2
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 abstract description 2
- 239000000292 calcium oxide Substances 0.000 abstract description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 238000006703 hydration reaction Methods 0.000 abstract description 2
- 238000006116 polymerization reaction Methods 0.000 abstract description 2
- 241000209094 Oryza Species 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 239000004575 stone Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 3
- 230000003213 activating effect Effects 0.000 description 2
- 239000003570 air Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000004480 active ingredient Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Abstract
The invention relates to the technical field of concrete preparation, and discloses full coal gangue high-performance concrete and a preparation method thereof, wherein the full coal gangue high-performance concrete comprises the following materials: a composite powdery reinforcing agent; a geopolymer admixture; coal gangue. The active components of alumina and calcium oxide on the surface of red coal gangue can form hydration reaction with cement, mineral powder and a composite powdery reinforcing agent after the original coal gangue is activated, and the interface bonding strength is far higher than that of the original coal gangue or washed coal gangue, so that the coal gangue aggregate concrete with C50 or above and medium and high strength and the composite powdery reinforcing agent can be realized on the basis of realizing 100 percent of coal gangue to replace natural sandstone materials, wherein the coal series kaolin has good plasticity, very high cohesiveness, better fire resistance and other physicochemical properties after being calcined, the particles are close to the nanometer level after being mixed with mineral powder and the like, and the volcanic ash reaction and the polymerization reaction are more sufficient, so that the strength of the coal gangue aggregate concrete is improved.
Description
Technical Field
The invention relates to the technical field of concrete preparation, in particular to full-coal gangue high-performance concrete and a preparation method thereof.
Background
China, as the first coal-producing big country all over the world, has a large amount of stockpiled coal gangues, but in the prior art, the stockpiled coal gangues are generally difficult to realize the resource utilization of large amount, and when a cement concrete pavement surface course is prepared, natural broken stones and natural sand or stone powder are mostly adopted, natural resources need to be exploited, the preparation investment is high, the risk is high, and certain pollution is caused to soil bodies, water bodies and air.
Disclosure of Invention
Technical problem to be solved
The invention aims to provide full coal gangue high-performance concrete and a preparation method thereof, and aims to solve the problems that in the prior art provided by the background art, the utilization of a large amount of stockpiled coal gangue as resources is generally difficult to realize, when a cement concrete pavement surface layer is prepared, natural broken stones and natural sand or stone powder are mostly adopted, natural resources need to be exploited, the preparation investment is high, the risk is high, and the pollution is large.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: the full coal gangue high-performance concrete comprises the following materials:
a composite powdery reinforcing agent;
a geopolymer admixture;
coal gangue.
Preferably, the method comprises the following steps:
s1, self-made composite powdery reinforcing agent;
s2, self-making a geopolymer admixture;
s3, a coal gangue activation process;
and S4, designing the mixing proportion of the high-performance concrete.
Preferably, the composite powdery reinforcing agent is formed by mixing an active siliceous material, an active aluminum material and water glass.
Preferably, the active siliceous material is either or both of rice hull ash and silica ash.
Preferably, the active aluminum material is any one of calcined coal-based kaolin, aluminosilicate cement and sulphoaluminate cement or the combination of the calcined coal-based kaolin, the aluminosilicate cement and the sulphoaluminate cement.
Preferably, the geopolymer blend comprises the following preparation steps:
s2-1, calcining the coal gangue to 1300-1400 ℃ at a high temperature;
s2-2, blending with mineral powder in a certain proportion;
and S2-3, crushing the mixture to be more than 800 meshes by adopting an airflow crusher.
Preferably, the coal gangue activation process comprises the following preparation steps:
s3-1, calcining the coal gangue to 700-900 ℃ to obtain red coal gangue, wherein each performance of aggregate exceeds that of original coal gangue;
s3-2, crushing the mixture to be below 31.5mm in maximum engineering particle size by adopting crushing equipment;
and S3-3, screening and then carrying out continuous grading design.
Preferably, the design of the mixing proportion of the high-performance concrete comprises the following preparation steps:
s4-1, combining original-state coal gangue and calcined coal gangue (red coal gangue for short) by using a crushing value as an assessment index, and meeting the specification requirement;
s4-2, adding a self-made composite powdery reinforcing agent, and taking a self-made geopolymer admixture as a filler and the like;
s4-3, pre-wetting coal gangue in advance, and blending the coal gangue in a certain proportion;
and S4-4, obtaining the high-performance concrete when the slump reaches over 160mm and the expansion reaches over 650 mm.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the full coal gangue high-performance concrete and the preparation method thereof, after the original coal gangue is activated, active ingredients of alumina and calcium oxide on the surface of the red coal gangue can form hydration reaction with cement, mineral powder and a composite powdery reinforcing agent, and the interface bonding strength is far higher than that of the original coal gangue or washed coal gangue, so that the coal gangue aggregate concrete with medium and high strength of C50 and above can be realized on the basis of realizing 100% coal gangue replacing natural sandstone materials;
2. the all-coal gangue high-performance concrete and the preparation method thereof are characterized in that the all-coal gangue high-performance concrete is compounded with a powdery reinforcing agent, wherein coal series kaolin has good plasticity, high cohesiveness, good fire resistance and other physical and chemical properties after being calcined, particles are close to the nanometer level after being mixed with mineral powder and the like, and the volcanic ash reaction and the polymerization reaction are more sufficient, so that the strength of the coal gangue aggregate concrete is increased, the water retention and the cohesiveness of the concrete are enhanced, and the coal gangue aggregate concrete becomes the concrete with high workability, high strength and durability;
3. the all-coal gangue high-performance concrete and the preparation method thereof can realize 'changing waste into valuable', reduce occupied land, reduce pollution to soil, water and air, and reduce exploitation of natural resources, and have low investment and small risk, so the technical system is an environment-friendly and resource-saving technology, and has very remarkable comprehensive benefits;
4. the all-coal gangue high-performance concrete and the preparation method thereof can improve the mining area and the surrounding ecological environment so as to ensure the green sustainable development of modern coal mine enterprises, utilize cheap raw materials, and adopt a new technology to endow building materials with powerful functions, thereby having great significance for saving resources.
Drawings
FIG. 1 is a flow chart of the present invention;
FIG. 2 is a graph of the test strength of the coal gangue concrete of the present invention;
FIG. 3 is a diagram of the test strength and the fracture section of the gangue concrete of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Referring to fig. 1-3, the present invention provides a technical solution: the full coal gangue high-performance concrete comprises the following materials:
a composite powdery reinforcing agent;
a geopolymer admixture;
100 percent of coal gangue.
The method comprises the following manufacturing steps:
s1, self-made composite powdery reinforcing agent;
s2, self-making a geopolymer admixture;
s3, a coal gangue activation process;
and S4, designing the mixing proportion of the high-performance concrete.
The composite powdery reinforcing agent is formed by mixing an active siliceous material, an active aluminum material and water glass.
The active siliceous material is one or two of rice hull ash and silica fume.
The active aluminum material is any one or the combination of calcined coal series kaolin, aluminosilicate cement and sulphoaluminate cement.
The geopolymer admixture comprises the following preparation steps:
s2-1, calcining the coal gangue to 1300-1400 ℃ at a high temperature;
s2-2, mixing the ore powder with the mixture according to a certain proportion;
and S2-3, crushing the mixture to be more than 800 meshes by adopting an airflow crusher.
The coal gangue activation process comprises the following preparation steps:
s3-1, calcining the coal gangue to 700-900 ℃ to obtain red coal gangue, wherein the performance of the aggregate exceeds that of original coal gangue;
s3-2, crushing to below 31.5mm of maximum engineering particle size by adopting crushing equipment;
and S3-3, screening and then carrying out continuous grading design.
The design of the mixing proportion of the high-performance concrete comprises the following preparation steps:
s4-1, combining undisturbed coal gangue and calcined coal gangue (red coal gangue for short) by taking a crushing value as an assessment index, wherein the combination meets the specification requirement;
s4-2, adding a self-made composite powdery reinforcing agent, and taking a self-made geopolymer admixture as a filler and the like;
s4-3, pre-wetting coal gangue in advance, and blending the coal gangue in a certain proportion;
and S4-4, obtaining the high-performance concrete when the slump reaches more than 160mm and the expansion reaches more than 650 mm.
The high-performance concrete with the strength grade of C50 and above and the product thereof are directly prepared by utilizing the coal gangue to regenerate coarse aggregate, fine aggregate and powder, the concrete sample doped with 100 percent of coal gangue aggregate has the compressive strength of more than 30MPa in 7 days, the compressive strength of more than 45MPa in 28 days and the flexural strength of more than 5.0MPa
Example two
Referring to fig. 1-3, the present invention provides a technical solution: the full coal gangue high-performance concrete comprises the following materials:
a composite powdery reinforcing agent;
a geopolymer admixture;
70 percent of coal gangue.
The method comprises the following manufacturing steps:
s1, self-made composite powdery reinforcing agent;
s2, self-making a geopolymer admixture;
s3, activating the coal gangue;
and S4, designing the mixing proportion of the high-performance concrete.
The composite powdery reinforcing agent is formed by mixing an active siliceous material, an active aluminum material and water glass.
The active siliceous material is one or two of rice hull ash and silica fume.
The active aluminum material is any one or the combination of calcined coal series kaolin, aluminosilicate cement and sulphoaluminate cement.
The geopolymer admixture comprises the following preparation steps:
s2-1, calcining the coal gangue to 1300-1400 ℃ at a high temperature;
s2-2, blending with mineral powder in a certain proportion;
and S2-3, crushing to be more than 800 meshes by using a jet mill.
The coal gangue activation process comprises the following preparation steps:
s3-1, calcining the coal gangue to 700-900 ℃ to obtain red coal gangue, wherein each performance of aggregate exceeds that of original coal gangue;
s3-2, crushing to below 31.5mm of maximum engineering particle size by adopting crushing equipment;
and S3-3, screening and then carrying out continuous grading design.
The design of the mixing proportion of the high-performance concrete comprises the following preparation steps:
s4-1, combining original-state coal gangue and calcined coal gangue (red coal gangue for short) by using a crushing value as an assessment index, and meeting the specification requirement;
s4-2, doping a self-made composite powdery reinforcing agent, taking a self-made geopolymer admixture as a filler and the like;
s4-3, pre-wetting coal gangue in advance, and blending the coal gangue in a certain proportion;
and S4-4, obtaining the high-performance concrete when the slump reaches more than 160mm and the expansion reaches more than 650 mm.
The coal gangue is used for regenerating coarse aggregate, fine aggregate and powder to directly prepare high-performance concrete with the strength grade of C50 and above and products thereof, and a concrete sample doped with 70 percent of coal gangue aggregate has the compression strength of more than 40MPa in 7 days, the compression strength of more than 60MPa in 28 days and the breaking strength of more than 8.0 MPa.
EXAMPLE III
Referring to fig. 1-3, the present invention provides a technical solution: the full coal gangue high-performance concrete comprises the following materials:
5% of a composite powdery reinforcing agent;
5% of geopolymer admixture;
80% of coal gangue;
10 percent of red coal gangue.
The method comprises the following manufacturing steps:
s1, self-made composite powdery reinforcing agent;
s2, self-making a geopolymer admixture;
s3, a coal gangue activation process;
and S4, designing the mixing proportion of the high-performance concrete.
The composite powdery reinforcing agent is formed by mixing an active siliceous material, an active aluminum material and water glass.
The active siliceous material is one or two of rice hull ash and silica fume.
The active aluminum material is any one or the combination of calcined coal-series kaolin, aluminosilicate cement and sulphoaluminate cement.
The geopolymer admixture comprises the following preparation steps:
s2-1, calcining the coal gangue to 1300-1400 ℃ at a high temperature;
s2-2, blending with mineral powder in a certain proportion;
and S2-3, crushing to be more than 800 meshes by using a jet mill.
The coal gangue activation process comprises the following preparation steps:
s3-1, calcining the coal gangue to 700-900 ℃ to obtain red coal gangue, wherein the performance of the aggregate exceeds that of original coal gangue;
s3-2, crushing to below 31.5mm of maximum engineering particle size by adopting crushing equipment;
and S3-3, screening and then carrying out continuous grading design.
The design of the mixing proportion of the high-performance concrete comprises the following preparation steps:
s4-1, combining undisturbed coal gangue and calcined coal gangue (red coal gangue for short) by taking a crushing value as an assessment index, wherein the combination meets the specification requirement;
s4-2, adding a self-made composite powdery reinforcing agent, and taking a self-made geopolymer admixture as a filler and the like;
s4-3, pre-wetting coal gangue in advance, and blending the coal gangue in a certain proportion;
and S4-4, obtaining the high-performance concrete when the slump reaches over 160mm and the expansion reaches over 650 mm.
The high-performance concrete with the strength grade of more than C50 and the product thereof are directly prepared by utilizing the coal gangue recycled coarse aggregate, the fine aggregate and the powder, and a concrete test piece doped with 80 percent of the coal gangue aggregate has the compression strength of more than 34MPa in 7 days, the compression strength of more than 53MPa in 28 days and the breaking strength of more than 7.6 MPa.
Example four
Referring to fig. 1-3, the present invention provides a technical solution: the full coal gangue high-performance concrete comprises the following materials:
2% of a composite powdery reinforcing agent;
3% of geopolymer admixture;
90% of coal gangue;
5 percent of red coal gangue.
The method comprises the following manufacturing steps:
s1, self-made composite powdery reinforcing agent;
s2, self-making a geopolymer admixture;
s3, activating the coal gangue;
and S4, designing the mixing proportion of the high-performance concrete.
The composite powdery reinforcing agent is formed by mixing an active siliceous material, an active aluminum material and water glass.
The active siliceous material is one or two of rice hull ash and silica fume.
The active aluminum material is any one or the combination of calcined coal-series kaolin, aluminosilicate cement and sulphoaluminate cement.
The geopolymer admixture comprises the following preparation steps:
s2-1, calcining the coal gangue to 1300-1400 ℃ at a high temperature;
s2-2, mixing the ore powder with the mixture according to a certain proportion;
and S2-3, crushing to be more than 800 meshes by using a jet mill.
The coal gangue activation process comprises the following preparation steps:
s3-1, calcining the coal gangue to 700-900 ℃ to obtain red coal gangue, wherein each performance of aggregate exceeds that of original coal gangue;
s3-2, crushing to below 31.5mm of maximum engineering particle size by adopting crushing equipment;
and S3-3, screening and then carrying out continuous grading design.
The design of the mixing proportion of the high-performance concrete comprises the following preparation steps:
s4-1, combining original-state coal gangue and calcined coal gangue (red coal gangue for short) by using a crushing value as an assessment index, and meeting the specification requirement;
s4-2, adding a self-made composite powdery reinforcing agent, and taking a self-made geopolymer admixture as a filler and the like;
s4-3, pre-wetting the coal gangue in advance, and blending the coal gangue in a certain proportion;
and S4-4, obtaining the high-performance concrete when the slump reaches over 160mm and the expansion reaches over 650 mm.
The high-performance concrete with the strength grade of more than C50 and the product thereof are directly prepared by utilizing the coal gangue recycled coarse aggregate, the fine aggregate and the powder, the compressive strength of a concrete sample doped with 70 percent of the coal gangue aggregate can reach more than 32MPa in 7 days, the compressive strength can reach more than 51MPa in 28 days, and the flexural strength can reach more than 7.3 MPa.
Finally, it should be noted that the above-mentioned contents are only used for illustrating the technical solutions of the present invention, and do not limit the protection scope of the present invention, and those skilled in the art can make simple modifications or equivalent substitutions on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (8)
1. The full-coal gangue high-performance concrete is characterized in that: comprises the following materials:
a composite powdery reinforcing agent;
a geopolymer admixture;
coal gangue.
2. A preparation method of full coal gangue high-performance concrete is characterized by comprising the following steps: the method comprises the following manufacturing steps:
s1, self-made composite powdery reinforcing agent;
s2, self-making a geopolymer admixture;
s3, a coal gangue activation process;
and S4, designing the mixing proportion of the high-performance concrete.
3. The preparation method of the full coal gangue high-performance concrete according to claim 2, which is characterized by comprising the following steps of: the composite powdery reinforcing agent is formed by mixing an active siliceous material, an active aluminum material and water glass.
4. The preparation method of the full coal gangue high-performance concrete according to claim 3, which is characterized by comprising the following steps: the active siliceous material is one or two of rice hull ash and silica fume.
5. The preparation method of the full coal gangue high-performance concrete according to claim 4, which is characterized by comprising the following steps of: the active aluminum material is any one or the combination of calcined coal series kaolin, aluminosilicate cement and sulphoaluminate cement.
6. The preparation method of the full coal gangue high-performance concrete according to claim 5, which is characterized by comprising the following steps of: the geopolymer admixture comprises the following preparation steps:
s2-1, calcining the coal gangue to 1300-1400 ℃ at a high temperature;
s2-2, mixing the ore powder with the mixture according to a certain proportion;
and S2-3, crushing to be more than 800 meshes by using a jet mill.
7. The preparation method of the full coal gangue high-performance concrete according to claim 6, which is characterized by comprising the following steps of: the coal gangue activation process comprises the following preparation steps:
s3-1, calcining the coal gangue to 700-900 ℃ to obtain red coal gangue, wherein the performance of the aggregate exceeds that of original coal gangue;
s3-2, crushing the mixture to be below 31.5mm in maximum engineering particle size by adopting crushing equipment;
and S3-3, screening and then carrying out continuous grading design.
8. The preparation method of the full coal gangue high-performance concrete according to claim 7, which is characterized by comprising the following steps of: the high-performance concrete mix proportion design comprises the following preparation steps:
s4-1, combining original-state coal gangue and calcined coal gangue (red coal gangue for short) by using a crushing value as an assessment index, and meeting the specification requirement;
s4-2, adding a self-made composite powdery reinforcing agent, and taking a self-made geopolymer admixture as a filler and the like;
s4-3, pre-wetting the coal gangue in advance, and blending the coal gangue in a certain proportion;
and S4-4, obtaining the high-performance concrete when the slump reaches over 160mm and the expansion reaches over 650 mm.
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| CN202211512192.5A CN115710115A (en) | 2022-11-29 | 2022-11-29 | All-coal gangue high-performance concrete and preparation method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105622013A (en) * | 2015-12-24 | 2016-06-01 | 六盘水师范学院 | Method for preparing high-performance concrete by using gangue as main raw material |
| CN107500585A (en) * | 2017-09-22 | 2017-12-22 | 中国矿业大学 | Wheat straw fibre strengthens gangue geopolymer and preparation method |
| CN110041002A (en) * | 2019-04-23 | 2019-07-23 | 刘翠芬 | A kind of levigate rice hull ash base composite blend and its application |
| CN112960954A (en) * | 2021-03-05 | 2021-06-15 | 安徽建筑大学 | High-strength low-drying-shrinkage all-coal gangue aggregate cement mortar and preparation method thereof |
-
2022
- 2022-11-29 CN CN202211512192.5A patent/CN115710115A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105622013A (en) * | 2015-12-24 | 2016-06-01 | 六盘水师范学院 | Method for preparing high-performance concrete by using gangue as main raw material |
| CN107500585A (en) * | 2017-09-22 | 2017-12-22 | 中国矿业大学 | Wheat straw fibre strengthens gangue geopolymer and preparation method |
| CN110041002A (en) * | 2019-04-23 | 2019-07-23 | 刘翠芬 | A kind of levigate rice hull ash base composite blend and its application |
| CN112960954A (en) * | 2021-03-05 | 2021-06-15 | 安徽建筑大学 | High-strength low-drying-shrinkage all-coal gangue aggregate cement mortar and preparation method thereof |
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Application publication date: 20230224 |