CN112830719A - Preparation method of active powder concrete slab - Google Patents
Preparation method of active powder concrete slab Download PDFInfo
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- CN112830719A CN112830719A CN202110067424.XA CN202110067424A CN112830719A CN 112830719 A CN112830719 A CN 112830719A CN 202110067424 A CN202110067424 A CN 202110067424A CN 112830719 A CN112830719 A CN 112830719A
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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
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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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/0013—Boron compounds
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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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a preparation method of an active powder concrete slab, which comprises the following raw materials in parts by weight: 32-40 parts of cement, 14-22 parts of activated carbon powder, 10-18 parts of silicon powder, 15-23 parts of steel fiber, 25-33 parts of borax, 12-20 parts of a defoaming agent, 7-15 parts of an organic acid dissolution promoter, 8-16 parts of a water reducing agent and 50-58 parts of water, and further comprises the following raw materials in parts by weight: 32 parts of cement, 14 parts of activated carbon powder, 10 parts of silicon powder, 15 parts of steel fiber, 25 parts of borax, 12 parts of defoaming agent, 7 parts of organic acid dissolution promoter, 8 parts of water reducing agent and 50 parts of water. The active powder concrete slab has high strength and high toughness, the organic acid dissolution promoter is added to form the active additive, and boric acid in the organic acid dissolution promoter can dissolve borax in a cement mixture, so that the structure of concrete is more compact.
Description
Technical Field
The invention relates to the technical field of concrete slab preparation processes, in particular to a preparation method of an active powder concrete slab.
Background
The cement industry is a high-pollution and high-energy-consumption industry, and the addition of mineral admixtures into cement concrete is an important and effective measure for reducing the consumption of cement. The modern concrete is doped with different mineral admixtures, and the performance of the concrete can be improved by utilizing different characteristics of the different mineral admixtures. The commonly used mineral admixtures are fly ash, mineral powder, silica fume, etc., which are widely used in civil engineering because they are added to concrete to improve the strength and durability of the concrete. In recent decades, due to the massive construction of water conservancy, traffic and industrial and civil engineering, fly ash resources are increasingly in short supply. Therefore, it is necessary to find a new mineral admixture which is easily available, excellent and inexpensive.
In recent years, with the rapid development of the assembly type building industry, building materials are also changed into various shapes, and are in development of compact gongs and drums, the building materials have the using function for buildings, and the visual effect is gradually reflected, particularly the beautiful appearance, the texture and the color of the materials of the outer walls of the buildings give people the most direct artistic effect.
The active powder concrete is a high-strength and high-performance concrete, and its basic composition materials include cement, mineral admixture, quartz sand, steel fibre, high-effective water-reducing agent and water. The basic preparation principle is as follows: the preparation is based on a theoretical model of maximum density, adopts optimal grain composition, considers the physical and chemical reaction among grains, greatly reduces the defects (gaps and microcracks) in the material, and improves the microstructure in the concrete, thereby obtaining ultrahigh mechanical property and durability. Compared with the common concrete member, the performance of the reactive powder concrete member on the market is improved, but the mechanical property of the reactive powder concrete member is difficult to meet the requirement, cracks are easy to generate, and the product quality is difficult to ensure
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a preparation method of an active powder concrete plate.
An active powder concrete slab comprises the following raw materials in parts by weight: 32-40 parts of cement, 14-22 parts of activated carbon powder, 10-18 parts of silicon powder, 15-23 parts of steel fiber, 25-33 parts of borax, 12-20 parts of a defoaming agent, 7-15 parts of an organic acid dissolution promoter, 8-16 parts of a water reducing agent and 50-58 parts of water.
Further, the feed comprises the following raw materials in parts by weight: 32 parts of cement, 14 parts of activated carbon powder, 10 parts of silicon powder, 15 parts of steel fiber, 25 parts of borax, 12 parts of defoaming agent, 7 parts of organic acid dissolution promoter, 8 parts of water reducing agent and 50 parts of water.
Further, the feed comprises the following raw materials in parts by weight: 36 parts of cement, 18 parts of activated carbon powder, 14 parts of silicon powder, 19 parts of steel fiber, 29 parts of borax, 16 parts of defoaming agent, 11 parts of organic acid dissolution accelerator, 12 parts of water reducing agent and 54 parts of water.
Further, the feed comprises the following raw materials in parts by weight: 40 parts of cement, 22 parts of activated carbon powder, 18 parts of silicon powder, 23 parts of steel fiber, 33 parts of borax, 20 parts of defoaming agent, 15 parts of organic acid dissolution promoter, 16 parts of water reducing agent and 58 parts of water.
Further, the organic acid solubilizing agent comprises a cyclic mixture of boric acid, sodium lignosulfonate, succinic acid and citric acid.
Further, the diameter of the steel fiber is 0.23mm, and the length of the steel fiber is 12 mm.
A preparation method of an active powder concrete slab comprises the following steps:
s1, putting the activated carbon powder, the silicon powder, the steel fiber and the borax in a stirrer for stirring at the stirring speed of 40r/S for 20-30 minutes;
s2, adding cement into the stirrer in the S1, and continuously stirring at the stirring speed of 50r/S for 25-40 minutes to obtain a dry cement mixture;
s3, mixing and stirring the water, the defoaming agent, the organic acid dissolution promoter and the water reducing agent according to the parts by weight, wherein the stirring speed is 30r/S, and the stirring time is 10-15 minutes to form the active additive;
s4, stirring the cement mixture obtained in the step S2, the active additive and water at a constant speed of 80r/S for 1-2 h;
s5, pouring the stirred cement mixture into a mold, pouring and forming, covering the poured product with a plastic film, transporting to a steam curing room, and statically curing for 6 hours to enable the concrete to reach or be about to reach initial setting;
s6, heating water to 60-70 ℃, spraying the water to the surface of the concrete, heating the water to 50-60 ℃ again, spraying the water to the surface of the concrete, and keeping the temperature of the concrete for 36-48h at 40 ℃;
and S7, demolding when the temperature of the concrete and the room temperature are not more than 15 ℃, and placing the demolded concrete slab in a warm and humid environment for curing.
The active powder concrete slab has high strength and high toughness, the organic acid dissolution promoter is added to form the active additive, and the boric acid in the organic acid dissolution promoter can dissolve the borax in the cement mixture, so that the structure of the concrete is more compact, the compressive strength of the concrete is improved, and the performance of the concrete is improved.
Detailed Description
The present invention will be further illustrated with reference to the following specific examples.
Example one
The invention provides a preparation method of an active powder concrete slab, which comprises the following steps:
s1, putting the activated carbon powder, the silicon powder, the steel fiber and the borax in a stirrer for stirring at the stirring speed of 40r/S for 20-30 minutes;
s2, adding cement into the stirrer in the S1, and continuously stirring at the stirring speed of 50r/S for 25-40 minutes to obtain a dry cement mixture;
s3, mixing and stirring the water, the defoaming agent, the organic acid dissolution promoter and the water reducing agent according to the parts by weight, wherein the stirring speed is 30r/S, and the stirring time is 10-15 minutes to form the active additive;
s4, stirring the cement mixture obtained in the step S2, the active additive and water at a constant speed of 80r/S for 1-2 h;
s5, pouring the stirred cement mixture into a mold, pouring and forming, covering the poured product with a plastic film, transporting to a steam curing room, and statically curing for 6 hours to enable the concrete to reach or be about to reach initial setting;
s6, heating water to 60-70 ℃, spraying the water to the surface of the concrete, heating the water to 50-60 ℃ again, spraying the water to the surface of the concrete, and keeping the temperature of the concrete for 36-48h at 40 ℃;
and S7, demolding when the temperature of the concrete and the room temperature are not more than 15 ℃, and placing the demolded concrete slab in a warm and humid environment for curing.
An active powder concrete slab comprises the following raw materials in parts by weight: 32 parts of cement, 14 parts of activated carbon powder, 10 parts of silicon powder, 15 parts of steel fiber, 25 parts of borax, 12 parts of defoaming agent, 7 parts of organic acid dissolution promoter, 8 parts of water reducing agent and 50 parts of water.
Example two
The invention provides a preparation method of an active powder concrete slab, which comprises the following steps:
s1, putting the activated carbon powder, the silicon powder, the steel fiber and the borax in a stirrer for stirring at the stirring speed of 40r/S for 20-30 minutes;
s2, adding cement into the stirrer in the S1, and continuously stirring at the stirring speed of 50r/S for 25-40 minutes to obtain a dry cement mixture;
s3, mixing and stirring the water, the defoaming agent, the organic acid dissolution promoter and the water reducing agent according to the parts by weight, wherein the stirring speed is 30r/S, and the stirring time is 10-15 minutes to form the active additive;
s4, stirring the cement mixture obtained in the step S2, the active additive and water at a constant speed of 80r/S for 1-2 h;
s5, pouring the stirred cement mixture into a mold, pouring and forming, covering the poured product with a plastic film, transporting to a steam curing room, and statically curing for 6 hours to enable the concrete to reach or be about to reach initial setting;
s6, heating water to 60-70 ℃, spraying the water to the surface of the concrete, heating the water to 50-60 ℃ again, spraying the water to the surface of the concrete, and keeping the temperature of the concrete for 36-48h at 40 ℃;
and S7, demolding when the temperature of the concrete and the room temperature are not more than 15 ℃, and placing the demolded concrete slab in a warm and humid environment for curing.
An active powder concrete slab comprises the following raw materials in parts by weight: 34 parts of cement, 16 parts of activated carbon powder, 12 parts of silicon powder, 17 parts of steel fiber, 27 parts of borax, 14 parts of defoaming agent, 9 parts of organic acid dissolution accelerator, 10 parts of water reducing agent and 52 parts of water
EXAMPLE III
The invention provides a preparation method of an active powder concrete slab, which comprises the following steps:
s1, putting the activated carbon powder, the silicon powder, the steel fiber and the borax in a stirrer for stirring at the stirring speed of 40r/S for 20-30 minutes;
s2, adding cement into the stirrer in the S1, and continuously stirring at the stirring speed of 50r/S for 25-40 minutes to obtain a dry cement mixture;
s3, mixing and stirring the water, the defoaming agent, the organic acid dissolution promoter and the water reducing agent according to the parts by weight, wherein the stirring speed is 30r/S, and the stirring time is 10-15 minutes to form the active additive;
s4, stirring the cement mixture obtained in the step S2, the active additive and water at a constant speed of 80r/S for 1-2 h;
s5, pouring the stirred cement mixture into a mold, pouring and forming, covering the poured product with a plastic film, transporting to a steam curing room, and statically curing for 6 hours to enable the concrete to reach or be about to reach initial setting;
s6, heating water to 60-70 ℃, spraying the water to the surface of the concrete, heating the water to 50-60 ℃ again, spraying the water to the surface of the concrete, and keeping the temperature of the concrete for 36-48h at 40 ℃;
and S7, demolding when the temperature of the concrete and the room temperature are not more than 15 ℃, and placing the demolded concrete slab in a warm and humid environment for curing.
An active powder concrete slab comprises the following raw materials in parts by weight: 36 parts of cement, 18 parts of activated carbon powder, 14 parts of silicon powder, 19 parts of steel fiber, 29 parts of borax, 16 parts of defoaming agent, 11 parts of organic acid dissolution accelerator, 12 parts of water reducing agent and 54 parts of water.
Example four
The invention provides a preparation method of an active powder concrete slab, which comprises the following steps:
s1, putting the activated carbon powder, the silicon powder, the steel fiber and the borax in a stirrer for stirring at the stirring speed of 40r/S for 20-30 minutes;
s2, adding cement into the stirrer in the S1, and continuously stirring at the stirring speed of 50r/S for 25-40 minutes to obtain a dry cement mixture;
s3, mixing and stirring the water, the defoaming agent, the organic acid dissolution promoter and the water reducing agent according to the parts by weight, wherein the stirring speed is 30r/S, and the stirring time is 10-15 minutes to form the active additive;
s4, stirring the cement mixture obtained in the step S2, the active additive and water at a constant speed of 80r/S for 1-2 h;
s5, pouring the stirred cement mixture into a mold, pouring and forming, covering the poured product with a plastic film, transporting to a steam curing room, and statically curing for 6 hours to enable the concrete to reach or be about to reach initial setting;
s6, heating water to 60-70 ℃, spraying the water to the surface of the concrete, heating the water to 50-60 ℃ again, spraying the water to the surface of the concrete, and keeping the temperature of the concrete for 36-48h at 40 ℃;
and S7, demolding when the temperature of the concrete and the room temperature are not more than 15 ℃, and placing the demolded concrete slab in a warm and humid environment for curing.
An active powder concrete slab comprises the following raw materials in parts by weight: 38 parts of cement, 20 parts of activated carbon powder, 16 parts of silicon powder, 21 parts of steel fiber, 31 parts of borax, 18 parts of defoaming agent, 13 parts of organic acid dissolution accelerator, 14 parts of water reducing agent and 56 parts of water.
EXAMPLE five
The invention provides a preparation method of an active powder concrete slab, which comprises the following steps:
s1, putting the activated carbon powder, the silicon powder, the steel fiber and the borax in a stirrer for stirring at the stirring speed of 40r/S for 20-30 minutes;
s2, adding cement into the stirrer in the S1, and continuously stirring at the stirring speed of 50r/S for 25-40 minutes to obtain a dry cement mixture;
s3, mixing and stirring the water, the defoaming agent, the organic acid dissolution promoter and the water reducing agent according to the parts by weight, wherein the stirring speed is 30r/S, and the stirring time is 10-15 minutes to form the active additive;
s4, stirring the cement mixture obtained in the step S2, the active additive and water at a constant speed of 80r/S for 1-2 h;
s5, pouring the stirred cement mixture into a mold, pouring and forming, covering the poured product with a plastic film, transporting to a steam curing room, and statically curing for 6 hours to enable the concrete to reach or be about to reach initial setting;
s6, heating water to 60-70 ℃, spraying the water to the surface of the concrete, heating the water to 50-60 ℃ again, spraying the water to the surface of the concrete, and keeping the temperature of the concrete for 36-48h at 40 ℃;
and S7, demolding when the temperature of the concrete and the room temperature are not more than 15 ℃, and placing the demolded concrete slab in a warm and humid environment for curing.
An active powder concrete slab comprises the following raw materials in parts by weight: 40 parts of cement, 22 parts of activated carbon powder, 18 parts of silicon powder, 23 parts of steel fiber, 33 parts of borax, 20 parts of defoaming agent, 15 parts of organic acid dissolution promoter, 16 parts of water reducing agent and 58 parts of water.
In the present example.
As seen from the compression resistance of the table, the compression strength, the volume weight, the drying shrinkage value, the elastic modulus and the impermeability grade of the active powder concrete slab prepared by the invention are excellent, the active powder concrete slab has high strength and high toughness, the organic acid dissolution promoter is added to form the active additive, and boric acid in the organic acid dissolution promoter can dissolve borax in the cement mixture, so that the structure of the concrete is more compact, the compression strength of the concrete is improved, and the performance of the concrete is improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. The active powder concrete slab is characterized by comprising the following raw materials in parts by weight: 32-40 parts of cement, 14-22 parts of activated carbon powder, 10-18 parts of silicon powder, 15-23 parts of steel fiber, 25-33 parts of borax, 12-20 parts of a defoaming agent, 7-15 parts of an organic acid dissolution promoter, 8-16 parts of a water reducing agent and 50-58 parts of water.
2. The reactive powder concrete panel according to claim 1, comprising the following raw materials in parts by weight: 32 parts of cement, 14 parts of activated carbon powder, 10 parts of silicon powder, 15 parts of steel fiber, 25 parts of borax, 12 parts of defoaming agent, 7 parts of organic acid dissolution promoter, 8 parts of water reducing agent and 50 parts of water.
3. The reactive powder concrete panel according to claim 1, comprising the following raw materials in parts by weight: 36 parts of cement, 18 parts of activated carbon powder, 14 parts of silicon powder, 19 parts of steel fiber, 29 parts of borax, 16 parts of defoaming agent, 11 parts of organic acid dissolution accelerator, 12 parts of water reducing agent and 54 parts of water.
4. The reactive powder concrete panel according to claim 1, comprising the following raw materials in parts by weight: 40 parts of cement, 22 parts of activated carbon powder, 18 parts of silicon powder, 23 parts of steel fiber, 33 parts of borax, 20 parts of defoaming agent, 15 parts of organic acid dissolution promoter, 16 parts of water reducing agent and 58 parts of water.
5. The reactive powder concrete panel according to claim 1, wherein the organic acid promoter comprises a cyclic mixture of boric acid, sodium lignosulfonate, succinic acid and citric acid.
6. An active powder concrete panel according to claim 1 wherein the steel fibres are 0.23mm in diameter and 12mm in length.
7. A preparation method of an active powder concrete slab is characterized by comprising the following steps:
s1, putting the activated carbon powder, the silicon powder, the steel fiber and the borax in a stirrer for stirring at the stirring speed of 40r/S for 20-30 minutes;
s2, adding cement into the stirrer in the S1, and continuously stirring at the stirring speed of 50r/S for 25-40 minutes to obtain a dry cement mixture;
s3, mixing and stirring the water, the defoaming agent, the organic acid dissolution promoter and the water reducing agent according to the parts by weight, wherein the stirring speed is 30r/S, and the stirring time is 10-15 minutes to form the active additive;
s4, stirring the cement mixture obtained in the step S2, the active additive and water at a constant speed of 80r/S for 1-2 h;
s5, pouring the stirred cement mixture into a mold, pouring and forming, covering the poured product with a plastic film, transporting to a steam curing room, and statically curing for 6 hours to enable the concrete to reach or be about to reach initial setting;
s6, heating water to 60-70 ℃, spraying the water to the surface of the concrete, heating the water to 50-60 ℃ again, spraying the water to the surface of the concrete, and keeping the temperature of the concrete for 36-48h at 40 ℃;
and S7, demolding when the temperature of the concrete and the room temperature are not more than 15 ℃, and placing the demolded concrete slab in a warm and humid environment for curing.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5374308A (en) * | 1993-05-27 | 1994-12-20 | Kirkpatrick; William D. | Blended hydraulic cement for both general and special applications |
| CN102976682A (en) * | 2012-11-27 | 2013-03-20 | 常州大学 | Environment friendly cement-based composite material |
| CN106699051A (en) * | 2016-12-06 | 2017-05-24 | 湖南联智桥隧技术有限公司 | Concrete and production method thereof |
| CN109467352A (en) * | 2018-12-29 | 2019-03-15 | 海南华盛混凝土有限公司 | A kind of C70 high intensity self-compacting concrete formula and preparation method thereof |
| CN109704695A (en) * | 2019-03-01 | 2019-05-03 | 中建材中岩科技有限公司 | Cast-in-place Reactive Powder Concrete of early-strength and preparation method thereof |
-
2021
- 2021-01-19 CN CN202110067424.XA patent/CN112830719A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5374308A (en) * | 1993-05-27 | 1994-12-20 | Kirkpatrick; William D. | Blended hydraulic cement for both general and special applications |
| CN102976682A (en) * | 2012-11-27 | 2013-03-20 | 常州大学 | Environment friendly cement-based composite material |
| CN106699051A (en) * | 2016-12-06 | 2017-05-24 | 湖南联智桥隧技术有限公司 | Concrete and production method thereof |
| CN109467352A (en) * | 2018-12-29 | 2019-03-15 | 海南华盛混凝土有限公司 | A kind of C70 high intensity self-compacting concrete formula and preparation method thereof |
| CN109704695A (en) * | 2019-03-01 | 2019-05-03 | 中建材中岩科技有限公司 | Cast-in-place Reactive Powder Concrete of early-strength and preparation method thereof |
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Application publication date: 20210525 |