CN112266212A - Concrete preparation process - Google Patents
Concrete preparation process Download PDFInfo
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- CN112266212A CN112266212A CN202011174673.0A CN202011174673A CN112266212A CN 112266212 A CN112266212 A CN 112266212A CN 202011174673 A CN202011174673 A CN 202011174673A CN 112266212 A CN112266212 A CN 112266212A
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- 239000004567 concrete Substances 0.000 title claims abstract description 80
- 238000002360 preparation method Methods 0.000 title claims abstract description 27
- 238000003756 stirring Methods 0.000 claims abstract description 72
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 61
- 239000000835 fiber Substances 0.000 claims abstract description 59
- 239000000945 filler Substances 0.000 claims abstract description 44
- 239000004568 cement Substances 0.000 claims abstract description 38
- 238000002156 mixing Methods 0.000 claims abstract description 33
- 239000010881 fly ash Substances 0.000 claims abstract description 31
- 239000000203 mixture Substances 0.000 claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000000843 powder Substances 0.000 claims abstract description 23
- 239000000654 additive Substances 0.000 claims abstract description 21
- 239000004576 sand Substances 0.000 claims abstract description 21
- 230000000996 additive effect Effects 0.000 claims abstract description 20
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 20
- 239000004094 surface-active agent Substances 0.000 claims abstract description 13
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000011863 silicon-based powder Substances 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 8
- 239000002994 raw material Substances 0.000 claims abstract description 8
- 241000196324 Embryophyta Species 0.000 claims description 15
- 239000002002 slurry Substances 0.000 claims description 15
- 239000003638 chemical reducing agent Substances 0.000 claims description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000002518 antifoaming agent Substances 0.000 claims description 10
- 239000003365 glass fiber Substances 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 9
- 239000010902 straw Substances 0.000 claims description 7
- 229920001732 Lignosulfonate Polymers 0.000 claims description 5
- 239000011398 Portland cement Substances 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 5
- 241000209140 Triticum Species 0.000 claims description 3
- 235000021307 Triticum Nutrition 0.000 claims description 3
- 229920000049 Carbon (fiber) Polymers 0.000 claims 2
- 239000004917 carbon fiber Substances 0.000 claims 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims 2
- 235000013339 cereals Nutrition 0.000 claims 1
- 230000003487 anti-permeability effect Effects 0.000 abstract description 3
- 238000005336 cracking Methods 0.000 abstract description 3
- 238000001035 drying Methods 0.000 abstract description 3
- 239000004033 plastic Substances 0.000 abstract description 3
- 229920003023 plastic Polymers 0.000 abstract description 3
- 238000009991 scouring Methods 0.000 abstract 1
- 239000012765 fibrous filler Substances 0.000 description 20
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 8
- 229910052799 carbon Inorganic materials 0.000 description 8
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000010298 pulverizing process Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- MKYBYDHXWVHEJW-UHFFFAOYSA-N N-[1-oxo-1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propan-2-yl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(C(C)NC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 MKYBYDHXWVHEJW-UHFFFAOYSA-N 0.000 description 1
- 229920002845 Poly(methacrylic acid) Polymers 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Images
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
- 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
-
- 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
- C04B2111/2038—Resistance against physical degradation
-
- 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
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Abstract
The invention discloses a concrete preparation process, which has the technical scheme that: the concrete preparation process specifically comprises the following steps: s1, preparing raw materials: taking 400-550 parts of cement, 60-90 parts of fiber filler, 12-15 parts of retarder, 600-750 parts of sand, 30-45 parts of additive, 80-100 parts of silica powder, 80-110 parts of fly ash, 50-80 parts of surfactant and 350 parts of water in parts by mass; s2, crushing the material: fully mixing cement, fiber filler, silicon powder and fly ash according to parts by weight, and then putting the mixture into a crusher for crushing to reach the use specification; s3, stirring and mixing for the first time: the crushed cement, the fiber filler, the silica powder and the fly ash are selected and uniformly mixed with the water and the sand which are proportioned according to the weight parts, and the fiber filler can effectively control microcracks caused by factors such as plastic shrinkage, drying shrinkage and temperature change of concrete, and improve the anti-cracking and anti-permeability performance and the anti-scouring performance of the concrete.
Description
Technical Field
The invention relates to the field of concrete preparation, in particular to a concrete preparation process.
Background
Concrete, referred to as "concrete" for short: refers to the general name of engineering composite materials formed by cementing aggregate into a whole by cementing materials. The term concrete generally refers to cement as the cementing material and sand and stone as the aggregate; the cement concrete, also called as common concrete, is obtained by mixing with water (which may contain additives and admixtures) according to a certain proportion and stirring, and is widely applied to civil engineering.
For example, a chinese patent with an issued publication number of CN111592283A discloses a commercial concrete and a preparation process thereof, which belongs to the field of building materials, is used for building construction, solves the problem that the existing concrete has cracks, and comprises the following components by weight percent: 300 parts of cement, 891 parts of mixed sand, 1005 parts of stones, 46 parts of mineral powder, 67 parts of fly ash and 7.6 parts of an additive, wherein the additive comprises a polycarboxylic acid high-performance water reducing agent, polymethacrylic acid, polyethylene glycol, hair powder and modified shell powder.
The commercial concrete has good crack resistance; however, commercial concrete of the above kind still has some disadvantages, such as: the service life of the concrete is prolonged without adding fiber filler.
Disclosure of Invention
The invention aims to provide a concrete preparation process to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
the concrete preparation process specifically comprises the following steps:
s1, preparing raw materials: taking 400-550 parts of cement, 60-90 parts of fiber filler, 12-15 parts of retarder, 600-750 parts of sand, 30-45 parts of additive, 80-100 parts of silica powder, 80-110 parts of fly ash, 50-80 parts of surfactant and 350 parts of water in parts by mass;
s2, crushing the material: fully mixing cement, fiber filler, silicon powder and fly ash according to parts by weight, and then putting the mixture into a crusher for crushing to reach the use specification;
s3, stirring and mixing for the first time: uniformly mixing the crushed cement, the fiber filler, the silica powder and the fly ash with the water and the sand which are proportioned according to the parts by weight, and fully stirring the mixture by a stirrer to prepare a first mixture;
s4, stirring and mixing for the second time: adding the additive and the surfactant into the prepared first mixture according to the parts by weight, stirring again by using a stirrer, and uniformly stirring to prepare a second mixture;
s5, stirring and mixing for three times; adding the retarder into the prepared second mixture according to the parts by weight, stirring by a stirrer, and uniformly stirring to obtain concrete slurry;
s6, concrete curing: and discharging the uniformly stirred concrete slurry from the stirrer, and standing to obtain the finished concrete.
Preferably, the fibrous filler comprises a plant fibrous filler, a carbon fibrous filler, glass fibers and steel fibers, and the mass ratio of the plant fibrous filler to the carbon fibrous filler to the glass fibers to the steel fibers is 2: 1: 1: 1.5.
preferably, the additive comprises a high-performance water reducing agent and a defoaming agent, and the mass ratio of the high-performance water reducing agent to the defoaming agent is 2: 1.
preferably, the plant fiber filler is one of straw fiber or wheat straw fiber.
Preferably, the cement is portland cement, and the particle size of the sand is 0.25-0.35 mm.
Preferably, the retarder is a lignosulfonate retarder.
Preferably, the concrete comprises the following raw materials in parts by weight: 450 parts of cement, 50-80 parts of fiber filler, 10-13 parts of retarder, 650 parts of sand 500, 20-35 parts of additive, 60-90 parts of silica powder, 60-90 parts of fly ash, 30-60 parts of surfactant and 250 parts of water 200.
Preferably, in the step S2, the mixing time of the cement, the fiber filler, the silicon powder and the fly ash is 5-8min, the crushing time is 10-13min, and the particle diameter of the crushed cement, the crushed fiber filler, the crushed silicon powder and the crushed fly ash is 5-8 mm.
Preferably, the stirring time of the stirrer in the step S3 is 7-11 min; the stirring time of the stirrer in the step S4 is 5-8 min; the stirring time of the stirrer in the step S5 is 15-21min, and the stirring speed of the stirrer in the step S3 is 60-90 r/min; the stirring speed of the stirrer in the step S4 is 100-130 r/min; the stirring speed of the stirrer in the step S5 is 150-180 r/min.
Preferably, the standing time of the concrete slurry in the step S6 is 10-13 min.
Compared with the prior art, the invention has the beneficial effects that:
in the concrete preparation process, the fiber filler can effectively control micro cracks caused by factors such as concrete plastic shrinkage, drying shrinkage, temperature change and the like, prevent and inhibit the formation and development of concrete primary cracks, greatly improve the anti-cracking and anti-permeability performance and the anti-abrasion performance of the concrete, and increase the toughness of the concrete, so that the service life of the concrete is prolonged.
Drawings
FIG. 1 is a process flow diagram 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.
Referring to fig. 1, the present invention provides a concrete preparation process, wherein the technical scheme is as follows:
the concrete preparation process specifically comprises the following steps:
s1, preparing raw materials: taking 300 parts of cement, 50 parts of fiber filler, 10 parts of retarder, 500 parts of sand, 20 parts of additive, 60 parts of silica powder, 60 parts of fly ash, 30 parts of surfactant and 200 parts of water according to the mass parts;
s2, crushing the material: fully mixing cement, fiber filler, silicon powder and fly ash according to parts by weight, and then putting the mixture into a crusher for crushing to reach the use specification;
s3, stirring and mixing for the first time: uniformly mixing the crushed cement, the fiber filler, the silica powder and the fly ash with the water and the sand which are proportioned according to the parts by weight, and fully stirring the mixture by a stirrer to prepare a first mixture;
s4, stirring and mixing for the second time: adding the additive and the surfactant into the prepared first mixture according to the parts by weight, stirring again by using a stirrer, and uniformly stirring to prepare a second mixture;
s5, stirring and mixing for three times; adding the retarder into the prepared second mixture according to the parts by weight, stirring by a stirrer, and uniformly stirring to obtain concrete slurry;
s6, concrete curing: and discharging the uniformly stirred concrete slurry from the stirrer, and standing to obtain the finished concrete.
In this embodiment, preferably, the fibrous filler includes a plant fibrous filler, a carbon fibrous filler, a glass fiber, and a steel fiber, and a mass ratio of the plant fibrous filler, the carbon fibrous filler, the glass fiber, and the steel fiber is 2: 1: 1: 1.5.
in this embodiment, preferably, the additive includes a high-performance water reducing agent and a defoaming agent, and a mass ratio of the high-performance water reducing agent to the defoaming agent is 2: 1.
in this embodiment, preferably, the plant fiber filler is straw fiber.
In this embodiment, preferably, the cement is portland cement, and the particle size of the sand is 0.25 to 0.35 mm.
In this embodiment, preferably, the retarder is a lignosulfonate retarder.
In this embodiment, preferably, in step S2, the mixing time of the cement, the fiber filler, the silica powder and the fly ash is 5min, the pulverizing time is 10min, and the particle diameter of the pulverized cement, the fiber filler, the silica powder and the fly ash is 5 mm.
In this embodiment, it is preferable that the stirring time of the stirrer in the step S3 is 7 min; the stirring time of the stirrer in the step S4 is 5 min; the stirring time of the stirrer in the step S5 is 15min, and the stirring speed of the stirrer in the step S3 is 60 r/min; the stirring speed of the stirrer in the step S4 is 100 r/min; in the step S5, the stirring speed of the stirrer is 150 r/min.
In this embodiment, preferably, the standing time of the concrete slurry in the step S6 is 10 min.
Example 2
Referring to fig. 1, the present invention provides a concrete preparation process, wherein the technical scheme is as follows:
the concrete preparation process specifically comprises the following steps:
s1, preparing raw materials: taking 375 parts of cement, 65 parts of fiber filler, 12 parts of retarder, 575 parts of sand, 38 parts of additive, 75 parts of silica powder, 75 parts of fly ash, 45 parts of surfactant and 275 parts of water according to the mass parts;
s2, crushing the material: fully mixing cement, fiber filler, silicon powder and fly ash according to parts by weight, and then putting the mixture into a crusher for crushing to reach the use specification;
s3, stirring and mixing for the first time: uniformly mixing the crushed cement, the fiber filler, the silica powder and the fly ash with the water and the sand which are proportioned according to the parts by weight, and fully stirring the mixture by a stirrer to prepare a first mixture;
s4, stirring and mixing for the second time: adding the additive and the surfactant into the prepared first mixture according to the parts by weight, stirring again by using a stirrer, and uniformly stirring to prepare a second mixture;
s5, stirring and mixing for three times; adding the retarder into the prepared second mixture according to the parts by weight, stirring by a stirrer, and uniformly stirring to obtain concrete slurry;
s6, concrete curing: and discharging the uniformly stirred concrete slurry from the stirrer, and standing to obtain the finished concrete.
In this embodiment, preferably, the fibrous filler includes a plant fibrous filler, a carbon fibrous filler, a glass fiber, and a steel fiber, and a mass ratio of the plant fibrous filler, the carbon fibrous filler, the glass fiber, and the steel fiber is 1: 2: 2: 1.5.
in this embodiment, preferably, the additive includes a high-performance water reducing agent and a defoaming agent, and a mass ratio of the high-performance water reducing agent to the defoaming agent is 1: 1.5.
in this embodiment, preferably, the plant fiber filler is wheat straw fiber.
In this embodiment, preferably, the cement is portland cement, and the particle size of the sand is 0.25 to 0.35 mm.
In this embodiment, preferably, the retarder is a lignosulfonate retarder.
In this embodiment, preferably, in step S2, the mixing time of the cement, the fiber filler, the silica powder, and the fly ash is 6min, the pulverizing time is 12min, and the particle diameter of the pulverized cement, the fiber filler, the silica powder, and the fly ash is 6 mm.
In this embodiment, it is preferable that the stirring time of the stirrer in the step S3 is 9 min; the stirring time of the stirrer in the step S4 is 6 min; the stirring time of the stirrer in the step S5 is 18min, and the stirring speed of the stirrer in the step S3 is 75 r/min; the stirring speed of the stirrer in the step S4 is 115 r/min; the stirring speed of the stirrer in the step S5 was 165 r/min.
In this embodiment, preferably, the standing time of the concrete slurry in the step S6 is 12 min.
Example 3
Referring to fig. 1, the present invention provides a concrete preparation process, wherein the technical scheme is as follows:
the concrete preparation process specifically comprises the following steps:
s1, preparing raw materials: weighing 450 parts of cement, 80 parts of fiber filler, 13 parts of retarder, 650 parts of sand, 35 parts of additive, 90 parts of silica powder, 90 parts of fly ash, 60 parts of surfactant and 250 parts of water according to the mass parts;
s2, crushing the material: fully mixing cement, fiber filler, silicon powder and fly ash according to parts by weight, and then putting the mixture into a crusher for crushing to reach the use specification;
s3, stirring and mixing for the first time: uniformly mixing the crushed cement, the fiber filler, the silica powder and the fly ash with the water and the sand which are proportioned according to the parts by weight, and fully stirring the mixture by a stirrer to prepare a first mixture;
s4, stirring and mixing for the second time: adding the additive and the surfactant into the prepared first mixture according to the parts by weight, stirring again by using a stirrer, and uniformly stirring to prepare a second mixture;
s5, stirring and mixing for three times; adding the retarder into the prepared second mixture according to the parts by weight, stirring by a stirrer, and uniformly stirring to obtain concrete slurry;
s6, concrete curing: and discharging the uniformly stirred concrete slurry from the stirrer, and standing to obtain the finished concrete.
In this embodiment, preferably, the fibrous filler includes a plant fibrous filler, a carbon fibrous filler, a glass fiber, and a steel fiber, and a mass ratio of the plant fibrous filler, the carbon fibrous filler, the glass fiber, and the steel fiber is 2: 2: 1: 1.
in this embodiment, preferably, the additive includes a high-performance water reducing agent and a defoaming agent, and a mass ratio of the high-performance water reducing agent to the defoaming agent is 1: 2.
in this embodiment, preferably, the plant fiber filler is straw fiber.
In this embodiment, preferably, the cement is portland cement, and the particle size of the sand is 0.25 to 0.35 mm.
In this embodiment, preferably, the retarder is a lignosulfonate retarder.
In this embodiment, preferably, in step S2, the mixing time of the cement, the fiber filler, the silica powder, and the fly ash is 8min, the pulverizing time is 13min, and the particle diameter of the pulverized cement, the fiber filler, the silica powder, and the fly ash is 8 mm.
In this embodiment, it is preferable that the stirring time of the stirrer in the step S3 is 11 min; the stirring time of the stirrer in the step S4 is 8 min; the stirring time of the stirrer in the step S5 is 21min, and the stirring speed of the stirrer in the step S3 is 90 r/min; the stirring speed of the stirrer in the step S4 is 130 r/min; in the step S5, the stirring speed of the stirrer is 180 r/min.
In this embodiment, preferably, the standing time of the concrete slurry in the step S6 is 13 min.
The concrete mechanical property is detected by referring to GB/T50081-2002 standard of common concrete mechanical property test method, and the test results are shown in Table 1.
| 1. Detecting items | 2. Unit of | 3. Example 1 | 4. Example 1 | 5. Example 1 | 6. Comparative example |
| 7. Compressive strength | 8. MPa | 9. 4.9 | 10. 5.0 | 11. 4.8 | 12. 3.2 |
| 13. Adhesive strength | 14. MPa | 15. 0.67 | 16. 0.69 | 17. 0.65 | 18. 0.44 |
As can be seen from Table 1, the concrete prepared in examples 1 to 3 of the present invention has better compressive strength and adhesive strength than the concrete prepared in comparative example, greatly reducing the possibility of occurrence of cracks and prolonging the service life of the concrete.
The working principle and the using process of the invention are as follows:
in the concrete preparation process, the fiber filler can effectively control micro cracks caused by factors such as concrete plastic shrinkage, drying shrinkage, temperature change and the like, prevent and inhibit the formation and development of concrete primary cracks, greatly improve the anti-cracking and anti-permeability performance and the anti-abrasion performance of the concrete, and increase the toughness of the concrete, so that the service life of the concrete is prolonged.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The concrete preparation process is characterized by comprising the following steps:
s1, preparing raw materials: taking 400-550 parts of cement, 60-90 parts of fiber filler, 12-15 parts of retarder, 600-750 parts of sand, 30-45 parts of additive, 80-100 parts of silica powder, 80-110 parts of fly ash, 50-80 parts of surfactant and 350 parts of water in parts by mass;
s2, crushing the material: fully mixing cement, fiber filler, silicon powder and fly ash according to parts by weight, and then putting the mixture into a crusher for crushing to reach the use specification;
s3, stirring and mixing for the first time: uniformly mixing the crushed cement, the fiber filler, the silica powder and the fly ash with the water and the sand which are proportioned according to the parts by weight, and fully stirring the mixture by a stirrer to prepare a first mixture;
s4, stirring and mixing for the second time: adding the additive and the surfactant into the prepared first mixture according to the parts by weight, stirring again by using a stirrer, and uniformly stirring to prepare a second mixture;
s5, stirring and mixing for three times; adding the retarder into the prepared second mixture according to the parts by weight, stirring by a stirrer, and uniformly stirring to obtain concrete slurry;
s6, concrete curing: and discharging the uniformly stirred concrete slurry from the stirrer, and standing to obtain the finished concrete.
2. A concrete preparation process according to claim 1, characterized in that: the fiber filler comprises a plant fiber filler, a carbon fiber filler, a glass fiber and a steel fiber, and the mass ratio of the plant fiber filler to the carbon fiber filler to the glass fiber to the steel fiber is 2: 1: 1: 1.5.
3. a concrete preparation process according to claim 1, characterized in that: the additive comprises a high-performance water reducing agent and a defoaming agent, wherein the mass ratio of the high-performance water reducing agent to the defoaming agent is 2: 1.
4. a concrete preparation process according to claim 2, characterized in that: the plant fiber filler is one of straw fiber or wheat straw fiber.
5. A concrete preparation process according to claim 1, characterized in that: the cement is Portland cement, and the grain size of the sand is 0.25-0.35 mm.
6. A concrete preparation process according to claim 1, characterized in that: the retarder is a lignosulfonate retarder.
7. A concrete preparation process according to claim 1, characterized in that: the concrete comprises the following raw materials in parts by weight: 450 parts of cement, 50-80 parts of fiber filler, 10-13 parts of retarder, 650 parts of sand 500, 20-35 parts of additive, 60-90 parts of silica powder, 60-90 parts of fly ash, 30-60 parts of surfactant and 250 parts of water 200.
8. A concrete preparation process according to claim 1, characterized in that: in the step S2, the mixing time of the cement, the fiber filler, the silicon powder and the fly ash is 5-8min, the crushing time is 10-13min, and the particle diameter of the crushed cement, the crushed fiber filler, the crushed silicon powder and the crushed fly ash is 5-8 mm.
9. A concrete preparation process according to claim 1, characterized in that: the stirring time of the stirrer in the step S3 is 7-11 min; the stirring time of the stirrer in the step S4 is 5-8 min; the stirring time of the stirrer in the step S5 is 15-21min, and the stirring speed of the stirrer in the step S3 is 60-90 r/min; the stirring speed of the stirrer in the step S4 is 100-130 r/min; the stirring speed of the stirrer in the step S5 is 150-180 r/min.
10. A concrete preparation process according to claim 1, characterized in that: and the standing time of the concrete slurry in the step S6 is 10-13 min.
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| CN113292308A (en) * | 2021-06-07 | 2021-08-24 | 无锡江达节能科技股份有限公司 | Concrete processing technology with high resistance |
| CN113372061A (en) * | 2021-06-22 | 2021-09-10 | 中国水产科学研究院黑龙江水产研究所 | Preparation method of baking-free ecological fish nest brick |
| CN113510841A (en) * | 2021-03-31 | 2021-10-19 | 江苏地控新材料科技有限公司 | Construction process and system for supporting mud in shield excavation of underwater tunnel |
| CN114213088A (en) * | 2022-01-14 | 2022-03-22 | 河南淅建新型建材有限公司 | Multiple mixing system and process formula for preparing environment-friendly concrete mortar |
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| TWI796036B (en) * | 2021-12-08 | 2023-03-11 | 財團法人工業技術研究院 | Concrete composition and concrete block thereof |
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