CN113968696A - Preparation method of green high-performance concrete - Google Patents
Preparation method of green high-performance concrete Download PDFInfo
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- CN113968696A CN113968696A CN202111232126.8A CN202111232126A CN113968696A CN 113968696 A CN113968696 A CN 113968696A CN 202111232126 A CN202111232126 A CN 202111232126A CN 113968696 A CN113968696 A CN 113968696A
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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
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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
- 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
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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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Abstract
The invention discloses a method for preparing green high-performance concrete, which relates to the field of concrete preparation methods, and comprises cement, admixture, aggregate, additive and water, wherein the cement is P.O 42.5 grade cement, each index meets the requirement, the admixture comprises fly ash, carbide slag and kaolin, the aggregate comprises building crushed aggregates, sand and gravels, the additive comprises a water reducing agent, an accelerating agent and an air entraining agent, and the water is common tap water, the method can fundamentally solve the treatment problem of most building waste, simultaneously reduces the transportation amount and the use amount of natural aggregate, reduces the mining of mines, reduces the storage of building garbage, improves the engineering structure by the green high-performance concrete, prolongs the service life of the structure, adopts the high-performance concrete for the engineering structure, can save resources, reduce the engineering cost, and effectively reduce the cost of raw materials, thereby reducing the cost of the concrete and being beneficial to environmental protection and sustainable development.
Description
Technical Field
The invention relates to the field of green high-performance concrete, in particular to a preparation method of the green high-performance concrete.
Background
The high-performance concrete is a concept proposed in the 80 th century, adopts modern concrete technology, selects high-quality raw materials, and is a novel high-technology concrete which needs to be added with sufficient amount of admixture and high-efficiency admixture besides cement, water and aggregate, and can meet the requirements of durability, construction property, applicability, strength, volume stability, economy and the like according to different use requirements. Because the strength is improved, the performance is improved, the service life of the structure is prolonged, and the engineering structure adopts the high-performance concrete, the resources can be saved, the engineering cost can be reduced, and the environment protection and the sustainable development are facilitated, so the concrete is internationally called as '21 st century green concrete'.
The existing green concrete has large dead weight, the compressive strength and the flexural strength of the existing green concrete are lower than those of common concrete, meanwhile, the high-performance concrete easily generates waste gas during production, the waste gas is a large amount of carbon dioxide and sulfur-containing gas, acid rain is easily formed, the environmental pollution is large, and the structural durability is poor.
Disclosure of Invention
The invention aims to: in order to solve the problems that most of the existing green concrete has large dead weight, the compressive strength and the flexural strength of the existing green concrete are lower than those of common concrete, meanwhile, the high-performance concrete is easy to generate waste gas during production, the waste gas is a large amount of carbon dioxide and sulfur-containing gas, acid rain is easy to form, the environmental pollution is large, and the structural durability is poor, the preparation method of the green high-performance concrete is provided.
In order to achieve the purpose, the invention provides the following technical scheme: the preparation method of the green high-performance concrete comprises cement, admixture, aggregate, additive and water, wherein the cement is P.O 42.5-grade cement, all indexes meet requirements, the admixture comprises fly ash, carbide slag and kaolin, the aggregate comprises building crushed aggregates, sand and gravel, the additive comprises a water reducing agent, an accelerating agent and an air entraining agent, the water is common tap water, and the raw materials are prepared according to the following weight parts: 260 parts of cement, 230 parts of fly ash, 280 parts of carbide slag, 50-100 parts of kaolin, 800 parts of 600-90 parts of building crushed materials, 580 parts of sand, 800-1200 parts of crushed stone, 6-7.8 parts of a water reducing agent, 5-6.5 parts of an accelerating agent, 3-5 parts of an air entraining agent and 200 parts of tap water.
By adopting the technical scheme, the construction waste is crushed and is prepared with sand and crushed stone, aggregate is integrated, resources are saved, the construction waste is fully utilized, and the prepared concrete has the advantages of fine structure, high compactness and good anti-permeability effect.
Further, the fly ash F is I-grade fly ash, wherein the content of SiO 2 is more than 50%, the content of Al 2O 3 is more than 30%, and the content of SO 3 is less than 2%.
By adopting the technical scheme, the problem of treating the fly ash discharged by most coal-fired power plants is solved fundamentally, waste is effectively utilized, the resource utilization rate is improved, dust and flying dust are reduced, and the atmospheric environment is improved.
Further, the carbide slag is modified carbide slag and is prepared by the following method:
the method comprises the following steps: burning the carbide slag, raising the temperature to 500 ℃ at 300-;
step two: immersing the carbide slag in water, standing for 1-2 days, adding sodium dodecyl sulfate accounting for 0.5-1.2% of the carbide slag in parts by weight, performing ultrasonic treatment for 5-10min, centrifuging, and drying to obtain modified carbide slag
By adopting the technical scheme, the carbide slag can be better mixed with other substances in the concrete when being added into the concrete, has better synergistic effect and can better improve the mechanical property of the concrete.
Further, the kaolin is modified kaolin, and is prepared by the following method:
the method comprises the following steps: mixing basalt fibers and aluminum silicate fibers according to a weight ratio of 1: (1-1.5) soaking in deionized water, boiling, keeping boiling for 10-20min, and cooling to room temperature;
step two: pouring kaolin into the mixed liquid, so that the kaolin is immersed in deionized water, wherein the weight of basalt fiber is 3-5% of that of the kaolin, and stirring for 10-20 min;
step three: centrifuging, separating and drying to obtain a mixture, heating the mixture to 200-350 ℃, wherein the heating time is 2-4h, and naturally cooling to obtain the modified kaolin.
By adopting the technical scheme, when the modified kaolin is prepared, the basalt fiber and the aluminum silicate are limited and boiled, so that the basalt fiber and the aluminum silicate can be effectively and uniformly mixed, the surface of the basalt fiber and the aluminum silicate is easy to adhere to other substances, then the kaolin is added, the kaolin is well attached to the surface of the mixed fiber, and the flexural strength of concrete can be effectively improved to a certain extent.
Furthermore, the building crushed aggregates are prepared by crushing building waste generated by dismantling waste buildings, the sand is medium sand, belongs to II-zone gradation, has the mud content of not more than 2.0 percent and the mud block content of not more than 0.5 percent, the crushed stones are tunnel hole slag, the concrete with the grade below C50 is prepared by secondary crushed stones with the thickness of 5-16mm and 16-31.5mm, and the crushed stones for the concrete with the thickness above C50 are secondary crushed stones with the thickness of 5-16mm and 10-20 mm.
By adopting the technical scheme, the construction waste is fully utilized, the treatment problem of most construction waste can be fundamentally solved, the transportation amount and the use amount of natural aggregate are reduced, the mining of mines is reduced, the storage of construction waste is reduced, the utilization of sand and broken stones can improve the resource utilization rate, and the waste stacking is reduced.
Further, the water reducing agent is a high-efficiency water reducing agent with the water reducing rate of more than 20%, and the air entraining agent is a high-efficiency air entraining agent with the mixing amount of 0.5-1.0 per mill.
Through adopting above-mentioned technical scheme, the use amount of water can be reduced in the addition of water-reducing agent to improve the early strength of concrete and reduce its slump, air entraining agent can improve concrete mixture's workability, water retentivity and cohesiveness, improves concrete fluidity, introduces a large amount of evenly distributed, closed and stable micro-bubbles at concrete mixture's the in-process of mixing.
Further, the preparation method comprises the following steps:
the method comprises the following steps: taking cement, fly ash, carbide slag, kaolin, building crushed materials, sand and broken stone according to the weight parts, carrying out dry material premixing to obtain a mixture,
step two: putting the mixture obtained in the step one into a stirrer, adding tap water, uniformly stirring for 1-3 min, uniformly mixing to obtain a first mixture,
step three: and (3) taking the water reducing agent, the accelerating agent and the air entraining agent according to the parts by weight, sequentially putting the materials into a stirrer, and uniformly stirring for 3-5 min to uniformly mix the materials to obtain the required concrete.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention adopts the fly ash, the carbide slag and the kaolin, wherein the fly ash F class is I-grade fly ash, the carbide slag is modified carbide slag, the kaolin is modified kaolin, the modified kaolin can be uniformly distributed in the concrete, and the flexural strength and the compressive strength of the concrete can be effectively improved by matching with the modified carbide slag.
2. The invention crushes the construction waste, mixes the construction waste with sand and crushed stone, integrates aggregate, saves resources, makes full use of the construction waste, can fundamentally solve the problem of treatment of most construction waste, reduces transportation volume and the use amount of natural aggregate, reduces mining of mines, reduces storage of construction waste, improves engineering structure by green high-performance concrete, prolongs the service life of the structure, can save resources and reduce engineering cost by adopting the high-performance concrete for the engineering structure, can effectively reduce the cost of raw materials, thereby reducing the cost of the concrete, and is beneficial to environmental protection and sustainable development.
Detailed Description
The present application is further described in detail in connection with the following examples.
In the following embodiments, the cement is a P.O 42.5 grade cement, each index meets the requirements, the admixture comprises fly ash, carbide slag and kaolin, the aggregate comprises building crushed aggregates, sand and gravel, the admixture comprises a water reducing agent and an air entraining agent, water is common tap water, and the raw materials are prepared according to the following weight parts: 260 parts of cement sand-containing material 200, 280 parts of fly ash-containing material 230, 50-100 parts of carbide slag, 40-90 parts of kaolin, 800 parts of building crushed material 600, 580 parts of sand-containing material 500, 1200 parts of crushed stone 800, 6-7.8 parts of water reducing agent, 3-5 parts of air entraining agent, 200 parts of tap water 150, and the class of fly ash F is I-grade fly ash, wherein the content of SiO 2 is more than 50%, the content of Al 2O 3 is more than 30%, the content of SO 3 is less than 2%, the carbide slag is modified carbide slag, the kaolin is modified kaolin, the building crushed material is construction waste generated by dismantling waste buildings, the sand is medium sand, belongs to II-zone gradation, the mud content is not more than 2.0%, the mud block content is not more than 0.5%, the crushed stone is tunnel cave slag, and the concrete with the grade below C50 is prepared by secondary crushed stones with the thickness of 5-16mm and 16-31.5mm, the crushed stone for concrete with the particle size of above C50 is a two-stage crushed stone with the particle size of 5-16mm and 10-20mm, the water reducing agent is a high-efficiency water reducing agent with the water reducing rate of more than 20%, and the air entraining agent is a high-efficiency air entraining agent with the mixing amount of 0.5-1.0 per mill.
The first embodiment is as follows: the preparation method of the green high-performance concrete comprises cement, admixture, aggregate, additive and water, wherein the cement is P.O 42.5-grade cement, all indexes meet requirements, the admixture comprises fly ash, carbide slag and kaolin, the aggregate comprises building crushed aggregates, sand and gravel, the additive comprises a water reducing agent and an air entraining agent, the water is common tap water, and the raw materials are prepared according to the following weight part ratio: 200 parts of cement, 230 parts of fly ash, 50 parts of carbide slag, 40 parts of kaolin, 600 parts of building crushed materials, 500 parts of sand, 800 parts of crushed stone, 6 parts of water reducing agent, 3 parts of air entraining agent and 150 parts of tap water.
A preparation method of green high-performance concrete comprises the following steps:
(1) taking cement, fly ash, carbide slag, kaolin, building crushed materials, sand and broken stone according to the weight parts, and carrying out dry material premixing to obtain a mixture;
(2) putting the mixture obtained in the step one into a stirrer, adding tap water, stirring at a constant speed for 1min, and uniformly mixing to obtain a first mixture;
(3) and (3) taking the water reducing agent, the accelerating agent and the air entraining agent according to the parts by weight, sequentially putting the materials into a stirrer, and uniformly stirring for 3min to uniformly mix the materials to obtain the required concrete.
Example two: the preparation method of the green high-performance concrete comprises cement, admixture, aggregate, additive and water, wherein the cement is P.O 42.5-grade cement, all indexes meet requirements, the admixture comprises fly ash, carbide slag and kaolin, the aggregate comprises building crushed aggregates, sand and gravel, the additive comprises a water reducing agent and an air entraining agent, the water is common tap water, and the raw materials are prepared according to the following weight part ratio: 210 parts of cement, 238 parts of fly ash, 58 parts of carbide slag, 50 parts of kaolin, 675 parts of building crushed materials, 520 parts of sand, 900 parts of crushed stone, 6.5 parts of a water reducing agent, 3.8 parts of an air entraining agent and 160 parts of tap water.
A preparation method of green high-performance concrete comprises the following steps:
(1) taking cement, fly ash, carbide slag, kaolin, building crushed materials, sand and broken stone according to the weight parts, and carrying out dry material premixing to obtain a mixture;
(2) putting the mixture obtained in the step one into a stirrer, adding tap water, stirring at a constant speed for 1min, and uniformly mixing to obtain a first mixture;
(3) and (3) taking the water reducing agent, the accelerating agent and the air entraining agent according to the parts by weight, sequentially putting the materials into a stirrer, and uniformly stirring for 3min to uniformly mix the materials to obtain the required concrete.
Example three: the preparation method of the green high-performance concrete comprises cement, admixture, aggregate, additive and water, wherein the cement is P.O 42.5-grade cement, all indexes meet requirements, the admixture comprises fly ash, carbide slag and kaolin, the aggregate comprises building crushed aggregates, sand and gravel, the additive comprises a water reducing agent and an air entraining agent, the water is common tap water, and the raw materials are prepared according to the following weight part ratio: 220 parts of cement, 245 parts of fly ash, 70 parts of carbide slag, 60 parts of kaolin, 690 parts of building crushed materials, 530 parts of sand, 950 parts of broken stone, 6.8 parts of a water reducing agent, 3.8 parts of an air entraining agent and 170 parts of tap water.
A preparation method of green high-performance concrete comprises the following steps:
(1) taking cement, fly ash, carbide slag, kaolin, building crushed materials, sand and broken stone according to the weight parts, and carrying out dry material premixing to obtain a mixture;
(2) putting the mixture obtained in the step one into a stirrer, adding tap water, stirring at a constant speed for 1.8min, and uniformly mixing to obtain a first mixture;
(3) and (3) taking the water reducing agent, the accelerating agent and the air entraining agent according to the parts by weight, sequentially putting the materials into a stirrer, and stirring at a constant speed for 4min to uniformly mix the materials to obtain the required concrete.
Example four: the preparation method of the green high-performance concrete comprises cement, admixture, aggregate, additive and water, wherein the cement is P.O 42.5-grade cement, all indexes meet requirements, the admixture comprises fly ash, carbide slag and kaolin, the aggregate comprises building crushed aggregates, sand and gravel, the additive comprises a water reducing agent and an air entraining agent, the water is common tap water, and the raw materials are prepared according to the following weight part ratio: 230 parts of cement, 255 parts of fly ash, 80 parts of carbide slag, 70 parts of kaolin, 720 parts of building crushed materials, 550 parts of sand, 1000 parts of broken stone, 7.2 parts of a water reducing agent, 4.2 parts of an air entraining agent and 180 parts of tap water.
A preparation method of green high-performance concrete comprises the following steps:
(1) taking cement, fly ash, carbide slag, kaolin, building crushed materials, sand and broken stone according to the weight parts, and carrying out dry material premixing to obtain a mixture;
(2) putting the mixture obtained in the step one into a stirrer, adding tap water, stirring at a constant speed for 2min, and uniformly mixing to obtain a first mixture;
(3) and (3) taking the water reducing agent, the accelerating agent and the air entraining agent according to the parts by weight, sequentially putting the materials into a stirrer, and stirring at a constant speed for 4min to uniformly mix the materials to obtain the required concrete.
Example five: the preparation method of the green high-performance concrete comprises cement, admixture, aggregate, additive and water, wherein the cement is P.O 42.5-grade cement, all indexes meet requirements, the admixture comprises fly ash, carbide slag and kaolin, the aggregate comprises building crushed aggregates, sand and gravel, the additive comprises a water reducing agent and an air entraining agent, the water is common tap water, and the raw materials are prepared according to the following weight part ratio: 240 parts of cement, 270 parts of fly ash, 90 parts of carbide slag, 80 parts of kaolin, 750 parts of building crushed materials, 570 parts of sand, 1100 parts of broken stone, 7.5 parts of a water reducing agent, 4.6 parts of an air entraining agent and 190 parts of tap water.
A preparation method of green high-performance concrete comprises the following steps:
(1) taking cement, fly ash, carbide slag, kaolin, building crushed materials, sand and broken stone according to the weight parts, and carrying out dry material premixing to obtain a mixture;
(2) putting the mixture obtained in the step one into a stirrer, adding tap water, stirring at a constant speed for 2.5min, and uniformly mixing to obtain a first mixture;
(3) and (3) taking the water reducing agent, the accelerating agent and the air entraining agent according to the parts by weight, sequentially putting the materials into a stirrer, and stirring at a constant speed for 4min to uniformly mix the materials to obtain the required concrete.
Example six: the preparation method of the green high-performance concrete comprises cement, admixture, aggregate, additive and water, wherein the cement is P.O 42.5-grade cement, all indexes meet requirements, the admixture comprises fly ash, carbide slag and kaolin, the aggregate comprises building crushed aggregates, sand and gravel, the additive comprises a water reducing agent and an air entraining agent, the water is common tap water, 260 parts of the cement, 280 parts of the fly ash, 100 parts of the carbide slag, 90 parts of the kaolin, 800 parts of the building crushed aggregates, 580 parts of the sand, 1200 parts of the gravel, 7.8 parts of the water reducing agent, 5 parts of the air entraining agent and 200 parts of the tap water.
A preparation method of green high-performance concrete comprises the following steps:
(1) taking cement, fly ash, carbide slag, kaolin, building crushed materials, sand and broken stone according to the weight parts, and carrying out dry material premixing to obtain a mixture;
(2) putting the mixture obtained in the step one into a stirrer, adding tap water, stirring at a constant speed for 3min, and uniformly mixing to obtain a first mixture;
(3) and (3) taking the water reducing agent, the accelerating agent and the air entraining agent according to the parts by weight, sequentially putting the materials into a stirrer, and stirring at a constant speed for 5min to uniformly mix the materials to obtain the required concrete.
TABLE 1
The above examples were tested for performance according to relevant national and industrial standards, while two comparative examples were carried out:
comparative example 1 is a general concrete prepared by a conventional method, raw materials of which are 300 parts of cement, 600 parts of sand, 1200 parts of stone and 120 parts of water;
comparative example 2 is a fly ash concrete prepared by a conventional method, the raw materials being 280 parts of cement, 76 parts of fly ash, 780 parts of sand, 1235 parts of stone and 170 parts of water. The concrete performance indexes of the cured products obtained by the tests of examples 1-6 and comparative examples 1-2 of the present invention are shown in Table 2.
TABLE 2
According to the data of the examples 1-6 and the table 1, the product produced by the invention has better flexural strength and compressive strength than the traditional concrete, the calcium carbide slag and the kaolin are added, the calcium carbide slag is modified calcium carbide slag, the kaolin is modified kaolin, the modified kaolin is uniformly distributed in the concrete, and the flexural strength and the compressive strength of the concrete can be effectively improved by matching with the modified calcium carbide slag, so that the concrete has higher strength and durability.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (7)
1. The preparation method of the green high-performance concrete comprises cement, admixture, aggregate, additive and water, and is characterized in that: the cement is P.O 42.5-grade cement, each index meets the requirement, the admixture comprises fly ash, carbide slag and kaolin, the aggregate comprises building crushed aggregates, sand and gravel, the admixture comprises a water reducing agent and an air entraining agent, the water is common tap water, and the raw materials are prepared according to the following weight parts: 260 parts of cement, 230 parts of fly ash, 280 parts of carbide slag, 50-100 parts of kaolin, 800 parts of building crushed aggregates, 580 parts of sand, 800 parts of crushed stone, 6-7.8 parts of a water reducing agent, 3-5 parts of an air entraining agent and 200 parts of tap water.
2. The preparation method of the green high-performance concrete according to claim 1, characterized in that: the fly ash F is I-grade fly ash, wherein the content of SiO 2 is more than 50%, the content of Al 2O 3 is more than 30%, and the content of SO 3 is less than 2%.
3. The preparation method of the green high-performance concrete according to claim 1, characterized in that: the carbide slag is modified carbide slag and is prepared by the following method:
the method comprises the following steps: burning the carbide slag, raising the temperature to 500 ℃ at 300-;
step two: immersing the carbide slag in water, standing for 1-2 days, adding sodium dodecyl sulfate accounting for 0.5-1.2% of the carbide slag in parts by weight, carrying out ultrasonic treatment for 5-10min, centrifuging, and drying to obtain the modified carbide slag.
4. The preparation method of the green high-performance concrete according to claim 1, characterized in that: the kaolin is modified kaolin, and is prepared by the following method:
the method comprises the following steps: mixing basalt fibers and aluminum silicate fibers according to a weight ratio of 1: (1-1.5) soaking in deionized water, boiling, keeping boiling for 10-20min, and cooling to room temperature;
step two: pouring kaolin into the mixed liquid, so that the kaolin is immersed in deionized water, wherein the weight of basalt fiber is 3-5% of that of the kaolin, and stirring for 10-20 min;
step three: centrifuging, separating and drying to obtain a mixture, heating the mixture to 200-350 ℃, wherein the heating time is 2-4h, and naturally cooling to obtain the modified kaolin.
5. The preparation method of the green high-performance concrete according to claim 1, characterized in that: the building crushed aggregates are prepared by crushing building waste generated by dismantling waste buildings, the sand is medium sand, belongs to II-zone gradation, has the mud content of not more than 2.0 percent and the mud block content of not more than 0.5 percent, the broken stones are tunnel hole slag, concrete with the grade below C50 is prepared by secondary broken stones with the thickness of 5-16mm and 16-31.5mm, and the broken stones for concrete with the thickness above C50 are secondary broken stones with the thickness of 5-16mm and 10-20 mm.
6. The preparation method of the green high-performance concrete according to claim 1, characterized in that: the water reducing agent is a high-efficiency water reducing agent with the water reducing rate of more than 20%, and the air entraining agent is a high-efficiency air entraining agent with the mixing amount of 0.5-1.0 per mill.
7. The preparation method of the green high-performance concrete according to claim 1, characterized in that: the method comprises the following steps:
(1) taking cement, fly ash, carbide slag, kaolin, building crushed materials, sand and broken stone according to the weight parts, carrying out dry material premixing to obtain a mixture,
(2) putting the mixture obtained in the step one into a stirrer, adding tap water, uniformly stirring for 1-3 min, uniformly mixing to obtain a first mixture,
(3) and (3) taking the water reducing agent, the accelerating agent and the air entraining agent according to the parts by weight, sequentially putting the materials into a stirrer, and uniformly stirring for 3-5 min to uniformly mix the materials to obtain the required concrete.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114907057A (en) * | 2022-01-26 | 2022-08-16 | 康达(厦门)建材有限公司 | Environment-friendly green concrete |
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| US20070163470A1 (en) * | 2004-02-13 | 2007-07-19 | Sandrine Chanut | Ultrahigh-performance, self-compacting concrete, preparation method thereof and use of same |
| CN103693898A (en) * | 2012-09-28 | 2014-04-02 | 任炳奇 | Novel concrete |
| CN111848014A (en) * | 2020-07-06 | 2020-10-30 | 深圳市深建混凝土有限公司 | Green high-performance concrete and preparation method thereof |
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- 2021-10-22 CN CN202111232126.8A patent/CN113968696A/en active Pending
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| US20070163470A1 (en) * | 2004-02-13 | 2007-07-19 | Sandrine Chanut | Ultrahigh-performance, self-compacting concrete, preparation method thereof and use of same |
| CN103693898A (en) * | 2012-09-28 | 2014-04-02 | 任炳奇 | Novel concrete |
| CN111848014A (en) * | 2020-07-06 | 2020-10-30 | 深圳市深建混凝土有限公司 | Green high-performance concrete and preparation method thereof |
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| CN114907057A (en) * | 2022-01-26 | 2022-08-16 | 康达(厦门)建材有限公司 | Environment-friendly green concrete |
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Application publication date: 20220125 |