CN113087467A - Concrete prepared from superfine mineral powder and preparation method thereof - Google Patents
Concrete prepared from superfine mineral powder and preparation method thereof Download PDFInfo
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- CN113087467A CN113087467A CN202110367150.6A CN202110367150A CN113087467A CN 113087467 A CN113087467 A CN 113087467A CN 202110367150 A CN202110367150 A CN 202110367150A CN 113087467 A CN113087467 A CN 113087467A
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- Prior art keywords
- concrete
- mineral powder
- cement
- mixing
- superfine
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- 239000004567 concrete Substances 0.000 title claims abstract description 72
- 239000000843 powder Substances 0.000 title claims abstract description 53
- 229910052500 inorganic mineral Inorganic materials 0.000 title claims abstract description 47
- 239000011707 mineral Substances 0.000 title claims abstract description 47
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 34
- 239000004568 cement Substances 0.000 claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000002994 raw material Substances 0.000 claims abstract description 19
- 239000000654 additive Substances 0.000 claims abstract description 10
- 230000000996 additive effect Effects 0.000 claims abstract description 6
- 238000002156 mixing Methods 0.000 claims description 19
- 235000019738 Limestone Nutrition 0.000 claims description 12
- 239000006028 limestone Substances 0.000 claims description 12
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 claims description 10
- 239000003638 chemical reducing agent Substances 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 7
- -1 basalt Substances 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 5
- 239000010438 granite Substances 0.000 claims description 5
- 239000004579 marble Substances 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000011398 Portland cement Substances 0.000 claims description 3
- 239000012615 aggregate Substances 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- 238000012216 screening Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims 5
- 239000010881 fly ash Substances 0.000 abstract description 26
- 239000004576 sand Substances 0.000 abstract description 2
- 239000004575 stone Substances 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 239000008030 superplasticizer Substances 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000011372 high-strength concrete Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000000126 substance 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Abstract
The invention relates to the technical field of concrete, in particular to concrete prepared by using superfine mineral powder and a preparation method thereof, which are characterized in that: the preparation raw materials of the concrete comprise cement, sand and stone materials, water, an additive and superfine mineral powder, and the superfine mineral powder with the granularity of 400 plus one 500 meshes is adopted to replace fly ash to be used as an admixture for preparing the concrete, so that the compactness of the concrete is better, the compressive strength of the concrete is higher, and the preparation cost of the concrete is reduced.
Description
Technical Field
The invention relates to the technical field of concrete, in particular to concrete prepared by using superfine mineral powder and a preparation method thereof.
Background
When concrete is prepared at home and abroad, a certain amount of fly ash is often mixed as a substitute material of cement, and the fly ash is applied in the following three ways in most cases: in the hydraulic concrete with the large volume and the low requirement on the early strength and the long-term strength of about 25-35 MPa, cement is replaced by the cement in a large mixing amount; replacing a small amount of cement (10-25%) in the structural concrete; the high-strength concrete is widely mixed in backfill or road base layers with low strength requirements. The fly ash can fill the gaps of aggregate particles and wrap the aggregate particles to form a lubricating layer, and the fly ash has volume weight (apparent density) of only about 2/3 of cement and good particle shape (the fly ash with good quality contains a large amount of glass beads), so the fly ash can be filled more compactly and is particularly remarkable in concrete with less cement. The fly ash can also delay the hydration speed, reduce the temperature rise of the concrete caused by hydration heat and is very beneficial to preventing the concrete from generating temperature cracks; because concrete is a main material in engineering construction, the concrete is applied to project construction such as buildings, structures, roads, bridges, water conservancy facilities, municipal engineering and the like, the use amount of the fly ash is also sharply increased, the situation of short supply and short demand is caused, and the price of the fly ash and the cost of the concrete are sharply increased.
It is necessary to provide an admixture capable of replacing fly ash for preparing concrete.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the concrete prepared by using the superfine mineral powder and the preparation method thereof.
The technical scheme of the invention is realized as follows: a concrete prepared by using superfine mineral powder is characterized in that: the concrete is prepared from the raw materials of cement, sandstone materials, water, additives and superfine mineral powder.
A preparation method of concrete is applied to producing the concrete prepared from ultrafine mineral powder, and is characterized by comprising the following steps:
s1, obtaining superfine mineral powder: selecting a proper amount of ore raw materials, and sequentially crushing, grinding and screening the ore raw materials to obtain 500-mesh superfine ore powder with the particle size of 400-;
s2, preparing materials: extracting cement, aggregate, water, an additive and the superfine mineral powder obtained in the step S1 according to the mass ratio of the preparation of common concrete;
s3, mixing one: uniformly mixing the cement, the sandstone materials and the superfine mineral powder extracted in the step S2 to obtain a mixed dry material;
s4, mixing II: uniformly mixing the water extracted in the step S2 and the admixture to obtain a mixed wet material;
s5, mixing three: and (4) adding the mixed wet material obtained in the step (S2) into the mixed dry material obtained in the step (S4), and uniformly stirring and mixing to obtain the concrete.
Preferably: the ore raw material is one or a mixture of two or more of limestone, basalt, granite, shale or marble.
Preferably: the cement is 42.5 ordinary portland cement.
Preferably: the sandstone materials are spun yarns which meet the production standard of common concrete.
Preferably: the additive is a composite of a naphthalene-based high-efficiency water reducing agent and a polycarboxylic acid-based high-efficiency water reducing agent, and the composite ratio of the naphthalene-based high-efficiency water reducing agent to the polycarboxylic acid-based high-efficiency water reducing agent is 2: 4.
The invention has the beneficial effects that: the concrete is prepared by using cement, sandstone materials, water, additives and superfine mineral powder, the superfine mineral powder is used for replacing fly ash in common concrete as an admixture for preparing the concrete, the superfine mineral powder is obtained by processing an ore raw material, and the ore raw material is one or a mixture of two or more of limestone, basalt, granite, shale or marble, so that local materials are conveniently obtained, the cost is low, the logistics cost is saved, resources can be effectively utilized, and the pollution is reduced; the granularity of the superfine mineral powder adopted by the invention is 400-500 meshes, and is smaller than that of the fly ash, so that the concrete mixed with the superfine mineral powder has better compactness, and the compressive strength of the concrete is higher; in addition, the ore raw material is an inert material, the superfine mineral powder obtained by processing the ore raw material bears the inertia of the ore raw material, and the superfine mineral powder is added into the concrete as a mixture, so that the chemical corrosion resistance of the concrete is enhanced, and the service life of the concrete is further prolonged.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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 1
The invention discloses concrete prepared from superfine mineral powder, and in the specific embodiment 1 of the invention, the concrete is prepared from raw materials including cement, sandstone materials, water, additives and superfine mineral powder.
By adopting the technical scheme, the invention uses the ultrafine mineral powder to replace fly ash in common concrete as the admixture for preparing the concrete, and provides the admixture capable of replacing the fly ash for preparing the concrete.
Example 2
The invention provides a preparation method of concrete, which is applied to producing the concrete prepared from ultrafine mineral powder and comprises the following steps:
s1, obtaining superfine mineral powder: selecting a proper amount of ore raw materials, and sequentially crushing, grinding and screening the ore raw materials to obtain 500-mesh superfine ore powder with the particle size of 400-;
s2, preparing materials: extracting cement, aggregate, water, an additive and the superfine mineral powder obtained in the step S1 according to the mass ratio of the preparation of common concrete;
s3, mixing one: uniformly mixing the cement, the sandstone materials and the superfine mineral powder extracted in the step S2 to obtain a mixed dry material;
s4, mixing II: uniformly mixing the water extracted in the step S2 and the admixture to obtain a mixed wet material;
s5, mixing three: and (4) adding the mixed wet material obtained in the step (S2) into the mixed dry material obtained in the step (S4), and uniformly stirring and mixing to obtain the concrete.
By adopting the technical scheme, the granularity of the obtained superfine mineral powder is 400-450 meshes, and is smaller than that of the fly ash, so that the concrete blended with the superfine mineral powder has better compactness, and the slump and the compressive strength of the concrete are higher.
In specific embodiment 2 of the present invention, the ore material is one or a mixture of two or more of limestone, basalt, granite, shale, and marble.
By adopting the technical scheme, the ore raw material is one or a mixture of two or more of limestone, basalt, granite, shale or marble, so that the material is conveniently obtained in situ, the cost is low, the logistics cost is saved, the resources can be effectively utilized, and the pollution is reduced.
In the specific embodiment 2 of the present invention, 42.5 ordinary portland cement is used as the cement.
In the embodiment 2 of the present invention, the sandstone material is spun yarn which meets the standard of common concrete production.
In the specific embodiment 2 of the invention, the admixture is a composite of a naphthalene-based superplasticizer and a polycarboxylic acid-based superplasticizer, and the composite ratio of the two is 2: 4.
By adopting the technical scheme, the raw materials of the concrete are all conventional products in the prior art or can be obtained by purchasing, and the materials are more convenient to obtain and prepare.
The concrete prepared by using the ultrafine mineral powder provided by the embodiment 1 of the invention is subjected to performance detection, and the performance detection is as follows:
1. the influence of adding ultrafine mineral powder ground from limestone of 400, 420 and 440 meshes respectively on the concrete strength compared with adding fly ash is shown in table 1:
TABLE 1
| Serial number | Blends | Water (W) | Sand and stone material | Cement | Powder | Slump constant | 3d | 7d | 28d | 28d split |
| 1 | Fly ash | 165 | 330 | 264 | 66 | 200 | 17.2 | 30.7 | 41.6 | 1.7 |
| 2 | 400 mesh mineral powder | 165 | 330 | 264 | 66 | 195 | 19.4 | 32 | 41.3 | 2.5 |
| 3 | 420 mesh ore powder | 165 | 330 | 264 | 66 | 200 | 23.9 | 32.4 | 42.4 | 2.7 |
| 4 | 440 mesh mineral powder | 165 | 330 | 264 | 66 | 210 | 23.3 | 32 | 42.5 | 2.9 |
Comparing with the table 1, other variables are controlled in equal amount, and from 3 days, 7 days and 28 days of strength, the strength of the concrete doped with the fly ash is 1-3Mpa lower than that of the ultrafine mineral powder doped with the equivalent limestone, and the tensile strength of the concrete doped with the fly ash in 28 days is about 1Mpa lower than that of the ultrafine mineral powder doped with the equivalent limestone.
2. The influence of adding superfine mineral powder ground by basalt of 400, 420 and 440 meshes respectively on the strength of concrete compared with adding fly ash is shown in table 2:
TABLE 2
Comparing with the table 2, other variables are controlled in equal amount, and from 3 days, 7 days and 28 days of strength, the strength of the concrete doped with the fly ash is 1-4MPa lower than that of the ultrafine mineral powder doped with the equivalent limestone, and the tensile strength of the concrete doped with the fly ash in 28 days is about 0.5MPa lower than that of the ultrafine mineral powder doped with the equivalent limestone.
By combining tables 1 and 2, the strength ratio of the limestone and basalt mineral powder to the fly ash in 3, 7 and 28 days is high by about 2-3 Mpa. 2-5Mpa lower than that of the water-milled iron slag. The 28-day tensile strength of the limestone, the basalt mineral powder and the fly ash is about 0.5Mpa higher.
In conclusion, the concrete prepared by using the ultrafine mineral powder and the preparation method thereof provided by the invention have the advantages that the ultrafine mineral powder is used for replacing fly ash as an admixture for preparing the concrete, the preparation cost of the concrete is reduced, and the compressive strength of the concrete is higher.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. A concrete prepared by using superfine mineral powder is characterized in that: the concrete is prepared from the raw materials of cement, sandstone materials, water, additives and superfine mineral powder.
2. A method for preparing concrete, which is applied to the production of the concrete prepared from the ultrafine ore powder as claimed in claim 1, and is characterized by comprising the following steps:
s1, obtaining superfine mineral powder: selecting a proper amount of ore raw materials, and sequentially crushing, grinding and screening the ore raw materials to obtain 500-mesh superfine ore powder with the particle size of 400-;
s2, preparing materials: extracting cement, aggregate, water, an additive and the superfine mineral powder obtained in the step S1 according to the mass ratio of the preparation of common concrete;
s3, mixing one: uniformly mixing the cement, the sandstone materials and the superfine mineral powder extracted in the step S2 to obtain a mixed dry material;
s4, mixing II: uniformly mixing the water extracted in the step S2 and the admixture to obtain a mixed wet material;
s5, mixing three: and (4) adding the mixed wet material obtained in the step (S2) into the mixed dry material obtained in the step (S4), and uniformly stirring and mixing to obtain the concrete.
3. A method of producing concrete according to claim 2, characterized in that: the ore raw material is one or a mixture of two or more of limestone, basalt, granite, shale or marble.
4. A method of producing concrete according to claim 2, characterized in that: the cement is 42.5 ordinary portland cement.
5. A method of producing concrete according to claim 2, characterized in that: the sandstone materials are spun yarns which meet the production standard of common concrete.
6. A method of producing concrete according to claim 2, characterized in that: the additive is a composite of a naphthalene-based high-efficiency water reducing agent and a polycarboxylic acid-based high-efficiency water reducing agent, and the composite ratio of the naphthalene-based high-efficiency water reducing agent to the polycarboxylic acid-based high-efficiency water reducing agent is 2: 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110367150.6A CN113087467A (en) | 2021-04-06 | 2021-04-06 | Concrete prepared from superfine mineral powder and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110367150.6A CN113087467A (en) | 2021-04-06 | 2021-04-06 | Concrete prepared from superfine mineral powder and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN113087467A true CN113087467A (en) | 2021-07-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110367150.6A Pending CN113087467A (en) | 2021-04-06 | 2021-04-06 | Concrete prepared from superfine mineral powder and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116177942A (en) * | 2023-03-02 | 2023-05-30 | 湛江市鹏港混凝土有限公司 | Preparation method of high-temperature-resistant concrete |
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| CN103896540A (en) * | 2014-03-14 | 2014-07-02 | 四川长安育才建材有限公司 | Preparation method of foam concrete in mountain flour structure |
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2021
- 2021-04-06 CN CN202110367150.6A patent/CN113087467A/en active Pending
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Application publication date: 20210709 |
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