CN108285307A - A kind of assorted fibre enhancing ultra high strength concrete and preparation method thereof - Google Patents
A kind of assorted fibre enhancing ultra high strength concrete and preparation method thereof Download PDFInfo
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- CN108285307A CN108285307A CN201810087725.7A CN201810087725A CN108285307A CN 108285307 A CN108285307 A CN 108285307A CN 201810087725 A CN201810087725 A CN 201810087725A CN 108285307 A CN108285307 A CN 108285307A
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Classifications
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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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/04—Silica-rich materials; Silicates
- C04B14/06—Quartz; Sand
- C04B14/068—Specific natural sands, e.g. sea -, beach -, dune - or desert sand
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/003—Methods for mixing
- B28C5/006—Methods for mixing involving mechanical aspects
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/40—Mixing specially adapted for preparing mixtures containing fibres
- B28C5/402—Methods
-
- 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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/38—Fibrous materials; Whiskers
- C04B14/48—Metal
-
- 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
Abstract
The invention discloses a kind of assorted fibres to enhance ultra high strength concrete and preparation method thereof, which is mainly made of the raw material of following weight ratio：430 520 parts of Portland cement, 200 270 parts of flyash, 60 90 parts of silicon ash, 20 26 parts of swelling agent, 620 710 parts of fine aggregate, 680 760 parts of coarse aggregate, 75 100 parts of microfilament steel fibre, microfilament end hook 90 120 parts of type steel fibers, 15 20 parts of polycarboxylate water-reducer, 150 160 parts of water.Compared with the existing technology, include assorted fibre in raw material of the present invention, the fiber hybrid (meeting certain volume ratio) of different draw ratios can not only improve the strength and toughness of concrete, the non-structural crack that concrete can also effectively be controlled makes hybrid fiber concrete have better activeness and quietness effect than traditional fibre concrete.In addition, the present invention utilizes countercurrent action or transverse flow principle, using rotary mixing and blending machine, the mixing for raw material has unexpected advantage, can greatly improve the performance of final products especially for steel fibre.
Description
Technical field
The present invention relates to a kind of assorted fibres to enhance ultra high strength concrete and preparation method thereof, belongs to superhigh intensity coagulation
Native technical field.
Background technology
Recent decades, the building and structure of infrastructure are gradually towards high-rise, Super High, large span and heavy-duty direction
Development, and many structures are exposed in the adverse circumstances such as sea salt area, frost region, aggressivity, common cement concrete
Ground deterioration can occur to early in the above conditions causes damage even to be failed, and has been increasingly difficult to meet the need of modern architecture system
It asks, and a large amount of cement concrete material of requirement of engineering is built on more and more High aititudes and harbour island.This is to cement concrete
Intensity, toughness, functional and durability demand is higher and higher, and traditional cement concrete material intensity is low, ductility and resistance to
Long property is poor, it is clear that cannot meet the requirements, then more and more domestic and foreign scholars begin one's study mixed with very-high performance
Solidifying soil.
High-strength high-performance concrete has the performances such as intensity is high, impermeability is good, durability and workability are excellent, but high-strength height
The easy brittle failure of performance concrete, bending strength is low, and in order to improve its brittleness, it is mixed that researcher's adding of fiber is prepared for glass fibre
The very-high performances fibre reinforced concretes such as solidifying soil, polypropylene fiber concrete, steel fiber reinforced concrete and carbon fiber reinforced concrete make to resist
Pressure property, anti-permeability performance, toughness, fatigue resistance and durability are obtained for and are greatly promoted, and are filled preparing ultra-high performance concrete
Divide and the industrial wastes such as flyash and silicon ash are utilized, there is sustainable developability, so high-performance fiber enhancing concrete has
Wide application prospect.
Very-high performance fibre reinforced concrete is mainly based on the Reactive Powder Concrete without coarse aggregate at present, by intensity
Limitation it is less always in very-high performance fibre reinforced concrete application for coarse aggregate (diameter be more than 5cm), and singly to mix
Based on a certain fiber, the ultra-high strong fiber containing coarse aggregate formed using two kinds or two or more fibers as reinforcing material enhances
Concrete is not common.The research mixed at present for different draw ratio steel fibres is limited, in particular with traditional stirring side
Formula realizes in ultra-high performance concrete assorted fibre evenly dispersed very difficult, this also limits China to a certain extent
High-performance fiber enhances the development and application of concrete.
Invention content
Goal of the invention：In order to solve the above technical problem, the present invention provides a kind of assorted fibre enhancing superhigh intensity is mixed
Solidifying soil and preparation method thereof.
Technical solution：To achieve the goals above, the invention discloses a kind of assorted fibres to enhance ultra high strength concrete,
It is characterized in that, it is mainly made of the raw material of following weight ratio：
It is 430-520 parts of Portland cement, 200-270 parts of flyash, 60-90 parts of silicon ash, 20-26 parts of swelling agent, thin
620-710 parts of aggregate, 680-760 parts of coarse aggregate, 75-100 parts of microfilament steel fibre,
Microfilament end hooks 90-120 parts of type steel fibers, 15-20 parts of polycarboxylate water-reducer, 150-160 parts of water.
The super high strength concrete refers to the concrete that grade reaches 150MPa and the above strength grade.
The Portland cement is PII52.5 grades of Portland cements.
The flyash is I grades of class flyash.
SiO in the silicon ash2Content should be greater than being equal to 95%, and specific surface area is not preferably less than 15000m2/kg。
The swelling agent is calcareous swelling agent, and pale yellow powder, specific surface area, which is more than, is equal to 200m2/ Kg, 1.18mm are sieved
Tail over and be less than or equal to 0.5%, 7d is more than or equal to 0.06% in limited expansion rate water, in water 7d turn 21d in air be more than or equal to-
0.01%.
The fine aggregate is river sand, and fineness modulus is sand in IIth area of 2.3-2.8.Clay content is less than or equal to 0.5%.
The coarse aggregate is basalt, using the basaltic broken stone of 5-12mm continuous gradings as coarse aggregate, gill shape
Granular mass content is less than or equal to 5%, and clay content is not more than 0.5%, and clod content is not more than 0.2%.
The steel fibre is that microfilament steel fibre and microfilament end hook type steel fibers, and microfilament steel fibre diameter is more than or equal to
0.2mm, length are more than or equal to 13mm, draw ratio 64-66, and tensile strength is more than or equal to 3000MPa, and the microfilament end hooks shaped steel
Fibre diameter is more than or equal to 0.35mm, and length is more than or equal to 20mm, draw ratio 56-58, and tensile strength is more than or equal to
2000MPa。
The solid content of the high-efficiency water-reducing agent of poly-carboxylic acid is more than or equal to 40% (mass content), and water-reducing rate is more than or equal to
33.9%.
The water is tap water or drinking water, is met《Concrete water standard》(JGJ63-2006) requirement.
The present invention also provides the preparation methods that the assorted fibre enhances ultra high strength concrete, including following step
Suddenly：
(1) cement, flyash, silicon ash, swelling agent, river sand and basalt are taken, is stirred using rotary mixing and blending machine
Mix uniformly mixed, be uniformly mixed material；
(2) high-efficiency water-reducing agent of poly-carboxylic acid is added to the water, stirs to get uniform aqueous solvent, be slowly added into above-mentioned mixing
In material, then the running parameter of regulating rotating type mixing and blending machine is mixed, and be uniformly mixed slurry；
(3) microfilament steel fibre is added into above-mentioned mixture slurry and microfilament end hooks type steel fibers, then adjusts rotation again
The running parameter of formula mixing and blending machine is mixed, and national standard blanks and moulding and conserving is finally pressed, you can is obtained the assorted fibre and is increased
Strong ultra high strength concrete.
More specifically, the preparation method of above-mentioned assorted fibre ultra high strength concrete, includes the following steps：
First blender is fully soaked with the cement mortar of water-cement ratio identical with super high strength concrete and contain the appearance of concrete
Device.
(1) load weighted cement, flyash, silicon ash, swelling agent, river sand, basalt are added to the mixed of blender successively
It closes in container, covers mixer container, start rotor and mixing vessel, rotary speed that rotor is counterclockwise is 130-170r/min,
It is 20-40r/min that mixing vessel, which rotates clockwise speed, and rotor is opposite with mixing vessel direction of rotation.Incorporation time is 100-
140S makes it be uniformly mixed to obtain mixture.
(2) high-efficiency water-reducing agent of poly-carboxylic acid will have been weighed, water is added, stirred the several seconds with glass bar, obtain uniform aqueous solvent.
From water filling port being slowly added into the aqueous solvent stirred evenly in mixture, spinner velocity is then adjusted, rotor revolves counterclockwise
Rotary speed is 280-320r/min, and it is 20-40r/min, rotor and mixing vessel rotation side that mixing vessel, which rotates clockwise speed,
To on the contrary, incorporation time is 300-420S, be uniformly mixed slurry.
(3) stop rotor and mixing vessel, load weighted microfilament steel fibre is added and microfilament end hooks type steel fibers, opens again
Turn and mixing vessel, rotary speed that rotor is counterclockwise are 280-320r/min, and it is 20- that mixing vessel, which rotates clockwise speed,
40r/min, rotor is with mixing vessel direction of rotation on the contrary, incorporation time is 100-140S, you can it is super to obtain assorted fibre enhancing
Strong concrete.
The rotary mixing and blending machine is designed according to countercurrent action or transverse flow principle, is had and is tilted installation
Revolving mixing vessel, will have material to be mixed be sent to an eccentrically mounted high speed rotation mix tool portion, rotor and
Opposite or reverse relative rotation may be implemented in mixing vessel, and rotating speed can in real time be adjusted according to individual demand, and it is very high to form speed difference
Reverse property mixture logistics, to realize that material uniformly mixes to greatest extent.
Technique effect：Compared with the existing technology, include assorted fibre in raw material of the present invention, the fiber of different draw ratios is mixed
Miscellaneous (meeting certain volume ratio) can not only improve the strength and toughness of concrete, moreover it is possible to the effectively unstructuredness of control concrete
Crack makes hybrid fiber concrete have better activeness and quietness effect than traditional fibre concrete；And wherein addition is appropriate
Coarse aggregate, but finally have no effect on strength character and reduce use cost.
In preparation method of the present invention use rotary mixing and blending machine, will have material to be mixed be sent to one it is eccentrically mounted
High speed rotation mix tool portion, opposite or reverse relative rotation may be implemented in rotor and mixing vessel, and rotating speed can be according to individual
It needs to adjust in real time, forms the very high reverse property mixture logistics of speed difference, tilt rotary mixing vessel and the position of installation
Together, guarantee makes mixture logistics form powerful vertical component to fixed multi-purpose tool, ensures the full and uniform mixing of material,
Multi-purpose tool can be reliably prevented mixture and be attached on the bottom and wall of mixing vessel, and accelerate to unload at the end of incorporation time
Material.Mixing of the hybrid mode for raw material has unexpected advantage, can greatly improve especially for steel fibre
The performance of final products.
Specific implementation mode
With reference to specific example, the present invention is furture elucidated, it should be understood that these examples be merely to illustrate the present invention without
For limiting the scope of the invention, after having read the present invention, various equivalent forms of the those skilled in the art to the present invention
Modification fall within the application range as defined in the appended claims.
Raw materials used in following embodiment is claimed below：
Super high strength concrete refers to the concrete that grade reaches 150MPa and the above strength grade.
Portland cement is PII52.5 grades of Portland cements.
Flyash is I grades of class flyash.
SiO in silicon ash2Content should be greater than being equal to 95%, and specific surface area is not preferably less than 15000m2/kg。
Swelling agent is calcareous swelling agent, and pale yellow powder, specific surface area, which is more than, is equal to 200m2/ Kg, 1.18mm tail over small
In equal to 0.5%, 7d is more than or equal to 0.06% in limited expansion rate water, and 7d turns 21d in air and is more than or equal to -0.01% in water.
Fine aggregate is river sand, and fineness modulus is sand in IIth area of 2.3-2.8.Clay content is less than or equal to 0.5%.
Coarse aggregate is basalt, using the basaltic broken stone of 5-12mm continuous gradings as coarse aggregate, flat-elongated particles matter
It measures content and is less than or equal to 5%, clay content is not more than 0.5%, and clod content is not more than 0.2%.
Steel fibre is microfilament steel fibre and microfilament end hooks type steel fibers, and microfilament steel fibre diameter is more than or equal to 0.2mm, length
More than or equal to 13mm, draw ratio is about 65, tensile strength be more than or equal to 3000MPa, microfilament end hook type steel fibers diameter be more than etc.
In 0.35mm, length is more than or equal to 20mm, and draw ratio is about 57, and tensile strength is more than or equal to 2000MPa.
The solid content of high-efficiency water-reducing agent of poly-carboxylic acid is more than or equal to 40% (mass content), and water-reducing rate is more than or equal to 33.9%.
Water is tap water or drinking water, is met《Concrete water standard》(JGJ63-2006) requirement.
The blender used is rotary mixing and blending machine (love is vertical to be permitted R types intensive mixer).
Embodiment 1
A kind of assorted fibre enhancing ultra high strength concrete, is counted, including following components in parts by weight：
466.1 parts of Portland cement, 233.1 parts of flyash, 77.7 parts of silicon ash, 23.3 parts of swelling agent,
699.2 parts of fine aggregate, 738.1 parts of coarse aggregate, 97.5 parts of microfilament steel fibre,
Microfilament end hooks 97.5 parts of type steel fibers, 17.1 parts of polycarboxylate water-reducer, 155.4 parts of water.
Preparation method：
First blender is fully soaked with the cement mortar of water-cement ratio identical with super high strength concrete and contain the appearance of concrete
Device.
(1) load weighted cement, flyash, silicon ash, swelling agent, river sand, basalt are added to the mixed of blender successively
It closes in container, covers mixer container, start rotor and mixing vessel, rotary speed that rotor is counterclockwise is 150r/min, mixing
It is 30r/min that container, which rotates clockwise speed, and rotor is opposite with mixing vessel direction of rotation.Incorporation time is 120S, it is made to stir
It mixes to be uniformly mixed and obtains mixture.
(2) high-efficiency water-reducing agent of poly-carboxylic acid will have been weighed, water is added, stirred the several seconds with glass bar, obtain uniform aqueous solvent.
From water filling port being slowly added into the aqueous solvent stirred evenly in mixture, spinner velocity is then adjusted, rotor revolves counterclockwise
Rotary speed is 300r/min, and it is 30r/min that mixing vessel, which rotates clockwise speed, rotor with mixing vessel direction of rotation on the contrary,
Incorporation time is 360S, and be uniformly mixed slurry.
(3) stop rotor and mixing vessel, load weighted microfilament steel fibre is added and microfilament end hooks type steel fibers, opens again
Turn and mixing vessel, rotary speed that rotor is counterclockwise are 300r/min, and it is 30r/ that mixing vessel, which rotates clockwise speed,
Min, rotor is with mixing vessel direction of rotation on the contrary, incorporation time is 120S, you can it is mixed to obtain assorted fibre enhancing superhigh intensity
Solidifying soil.
Embodiment 2
A kind of assorted fibre enhancing ultra high strength concrete, is counted, it includes following components in parts by weight：
466.1 parts of Portland cement, 233.1 parts of flyash, 77.7 parts of silicon ash, 23.3 parts of swelling agent,
699.2 parts of fine aggregate, 738.1 parts of coarse aggregate, 78 parts of microfilament steel fibre,
Microfilament end hooks 117 parts of type steel fibers, 17.1 parts of polycarboxylate water-reducer, 155.4 parts of water.
Preparation method：
First blender is fully soaked with the cement mortar of water-cement ratio identical with super high strength concrete and contain the appearance of concrete
Device.
(1) load weighted cement, flyash, silicon ash, swelling agent, river sand, basalt are added to the mixed of blender successively
It closes in container, covers mixer container, start rotor and mixing vessel, rotary speed that rotor is counterclockwise is 150r/min, mixing
It is 30r/min that container, which rotates clockwise speed, and rotor is opposite with mixing vessel direction of rotation.Incorporation time is 120S, it is made to stir
It mixes to be uniformly mixed and obtains mixture.
(2) high-efficiency water-reducing agent of poly-carboxylic acid will have been weighed, water is added, stirred the several seconds with glass bar, obtain uniform aqueous solvent.
From water filling port being slowly added into the aqueous solvent stirred evenly in mixture, spinner velocity is then adjusted, rotor revolves counterclockwise
Rotary speed is 300r/min, and it is 30r/min that mixing vessel, which rotates clockwise speed, rotor with mixing vessel direction of rotation on the contrary,
Incorporation time is 360S, and be uniformly mixed slurry.
(3) stop rotor and mixing vessel, load weighted microfilament steel fibre is added and microfilament end hooks type steel fibers, opens again
Turn and mixing vessel, rotary speed that rotor is counterclockwise are 300r/min, and it is 30r/ that mixing vessel, which rotates clockwise speed,
Min, rotor is with mixing vessel direction of rotation on the contrary, incorporation time is 120S, you can it is mixed to obtain assorted fibre enhancing superhigh intensity
Solidifying soil.
Embodiment 3
A kind of assorted fibre enhancing ultra high strength concrete, is counted, it includes following components in parts by weight：
430 parts of Portland cement, 200 parts of flyash, 60 parts of silicon ash, 20 parts of swelling agent,
620 parts of fine aggregate, 680 parts of coarse aggregate, 75 parts of microfilament steel fibre,
Microfilament end hooks 90 parts of type steel fibers, 15 parts of polycarboxylate water-reducer, 150 parts of water.
Preparation method：
First blender is fully soaked with the cement mortar of water-cement ratio identical with super high strength concrete and contain the appearance of concrete
Device.
(1) load weighted cement, flyash, silicon ash, swelling agent, river sand, basalt are added to the mixed of blender successively
It closes in container, covers mixer container, start rotor and mixing vessel, rotary speed that rotor is counterclockwise is 130r/min, mixing
It is 40r/min that container, which rotates clockwise speed, and rotor is opposite with mixing vessel direction of rotation.Incorporation time is 100S, it is made to stir
It mixes to be uniformly mixed and obtains mixture.
(2) high-efficiency water-reducing agent of poly-carboxylic acid will have been weighed, water is added, stirred the several seconds with glass bar, obtain uniform aqueous solvent.
From water filling port being slowly added into the aqueous solvent stirred evenly in mixture, spinner velocity is then adjusted, rotor revolves counterclockwise
Rotary speed is 280r/min, and it is 40r/min that mixing vessel, which rotates clockwise speed, rotor with mixing vessel direction of rotation on the contrary,
Incorporation time is 300S, and be uniformly mixed slurry.
(3) stop rotor and mixing vessel, load weighted microfilament steel fibre is added and microfilament end hooks type steel fibers, opens again
Turn and mixing vessel, rotary speed that rotor is counterclockwise are 280r/min, and it is 40r/ that mixing vessel, which rotates clockwise speed,
Min, rotor is with mixing vessel direction of rotation on the contrary, incorporation time is 100S, you can it is mixed to obtain assorted fibre enhancing superhigh intensity
Solidifying soil.
Embodiment 4
A kind of assorted fibre enhancing ultra high strength concrete, is counted, it includes following components in parts by weight：
520 parts of Portland cement, 270 parts of flyash, 90 parts of silicon ash, 26 parts of swelling agent,
710 parts of fine aggregate, 760 parts of coarse aggregate, 100 parts of microfilament steel fibre,
Microfilament end hooks 120 parts of type steel fibers, 20 parts of polycarboxylate water-reducer, 160 parts of water.
Preparation method：
First blender is fully soaked with the cement mortar of water-cement ratio identical with super high strength concrete and contain the appearance of concrete
Device.
(1) load weighted cement, flyash, silicon ash, swelling agent, river sand, basalt are added to the mixed of blender successively
It closes in container, covers mixer container, start rotor and mixing vessel, rotary speed that rotor is counterclockwise is 170r/min, mixing
It is 20r/min that container, which rotates clockwise speed, and rotor is opposite with mixing vessel direction of rotation.Incorporation time is 140S, it is made to stir
It mixes to be uniformly mixed and obtains mixture.
(2) high-efficiency water-reducing agent of poly-carboxylic acid will have been weighed, water is added, stirred the several seconds with glass bar, obtain uniform aqueous solvent.
From water filling port being slowly added into the aqueous solvent stirred evenly in mixture, spinner velocity is then adjusted, rotor revolves counterclockwise
Rotary speed is 320r/min, and it is 20r/min that mixing vessel, which rotates clockwise speed, rotor with mixing vessel direction of rotation on the contrary,
Incorporation time is 420S, and be uniformly mixed slurry.
(3) stop rotor and mixing vessel, load weighted microfilament steel fibre is added and microfilament end hooks type steel fibers, opens again
Turn and mixing vessel, rotary speed that rotor is counterclockwise are 320r/min, and it is 20r/ that mixing vessel, which rotates clockwise speed,
Min, rotor is with mixing vessel direction of rotation on the contrary, incorporation time is 140S, you can it is mixed to obtain assorted fibre enhancing superhigh intensity
Solidifying soil.
Comparative example 1：
It is same as Example 1, the difference is that, microfilament end hook type steel fibers are all replaced with to the microfilament steel of isodose
Fiber, other are constant.
Comparative example 2：
It is same as Example 1, the difference is that, the microfilament end that microfilament steel fibre is all replaced with to isodose hooks shaped steel
Fiber, other are constant.
Comparative example 3：
It is same as Example 1, the difference is that, coarse aggregate is all replaced with to the fine aggregate of isodose.
Comparative example 4
It is same as Example 1, the difference is that, the rotary mixing and blending machine is not used in preparation method, and adopt
With forced action type list horizontal axis concrete mixer.
Performance detection：
The concrete mix and properties of hardened concrete of above-described embodiment 1,2 and comparative example 1-4 are tested, as a result
Such as table one.
One test result of table
| Number | Compression strength/MPa | Split tensile strength/MPa | 4 flexural strength/MPa | Elasticity modulus/GPa |
| Embodiment one | 155.3 | 9.9 | 21.5 | 56.3 |
| Embodiment two | 162.3 | 11.4 | 21.9 | 54.3 |
| Comparative example 1 | 135.1 | 6.2 | 17.6 | 48.6 |
| Comparative example 2 | 134.7 | 6.5 | 17.2 | 47.9 |
| Comparative example 3 | 149.8 | 8.9 | 20.2 | 52.8 |
| Comparative example 4 | 125.6 | 4.1 | 15.8 | 44.2 |
Can be obtained by one result of upper table, compared with comparative example 1 and 2, i.e., with only add a kind of fiber, such as microfilament steel fibre or
Microfilament end hooks type steel fibers and compares, and after the present invention adds assorted fibre, product compression strength, split tensile strength, 4 points of anti-foldings are strong
Degree and elasticity modulus are significantly increased；In addition, compared with comparative example 3, i.e., compared with not adding coarse aggregate, product of the present invention
After adding coarse aggregate, product strength is substantially suitable, shows that product strength is hardly influenced by addition coarse aggregate；Finally, with it is right
Ratio 4 compares, i.e., compared with conventional mixed method, product compression strength of the present invention, split tensile strength, 4 flexural strengths
It is significantly increased with elasticity modulus.
Finally illustrate, the above embodiments are merely illustrative of the technical solutions of the present invention.If ordinary skill people
Member modifies to the technology example of the present invention or equivalent replacement should all cover without departing from spirit of the invention in the present invention
Right in.
Claims (10)
1. a kind of assorted fibre enhances ultra high strength concrete, which is characterized in that it is mainly by the raw material of following weight ratio
It is made：
430-520 parts of Portland cement, 200-270 parts of flyash, 60-90 parts of silicon ash, 20-26 parts of swelling agent, fine aggregate
620-710 parts, 680-760 parts of coarse aggregate, 75-100 parts of microfilament steel fibre,
Microfilament end hooks 90-120 parts of type steel fibers, 15-20 parts of polycarboxylate water-reducer, 150-160 parts of water.
2. assorted fibre according to claim 1 enhances ultra high strength concrete, which is characterized in that the common silicic acid
Salt cement is PII52.5 grades of Portland cements.
3. assorted fibre according to claim 1 enhances ultra high strength concrete, which is characterized in that the flyash is
I grades of class flyash.
4. assorted fibre according to claim 1 enhances ultra high strength concrete, which is characterized in that in the silicon ash
SiO2Content is more than or equal to 95%, and specific surface area is not less than 15000m2/kg。
5. assorted fibre according to claim 1 enhances ultra high strength concrete, which is characterized in that the swelling agent is
Calcareous swelling agent, pale yellow powder, specific surface area, which is more than, is equal to 200m2/ Kg, 1.18mm are tailed over less than or equal to 0.5%, limitation
7d is more than or equal to 0.06% in expansion rate water, and 7d turns 21d in air and is more than or equal to -0.01% in water.
6. assorted fibre according to claim 1 enhances ultra high strength concrete, which is characterized in that the fine aggregate is
River sand, fineness modulus are sand in the areas II of 2.3-2.8, and clay content is less than or equal to 0.5%；The coarse aggregate is basalt, is adopted
Use the basaltic broken stone of 5-12mm continuous gradings as coarse aggregate, flat-elongated particles mass content is less than or equal to 5%, and clay content is not
More than 0.5%, clod content is not more than 0.2%.
7. assorted fibre according to claim 1 enhances ultra high strength concrete, which is characterized in that the steel fibre is
Microfilament steel fibre and microfilament end hook type steel fibers, and microfilament steel fibre diameter is more than or equal to 0.2mm, and length is more than or equal to 13mm, long
Diameter ratio is 64-66, and tensile strength is more than or equal to 3000Mpa；The microfilament end hooks type steel fibers diameter and is more than or equal to 0.35mm, long
Degree is more than or equal to 20mm, draw ratio 56-58, and tensile strength is more than or equal to 2000MPa.
8. assorted fibre according to claim 1 enhances ultra high strength concrete, which is characterized in that the polycarboxylic acids is high
The solid content for imitating water-reducing agent is more than or equal to 40% (mass content), and water-reducing rate is more than or equal to 33.9%.
9. claim 1-8 any one of them assorted fibres enhance the preparation method of ultra high strength concrete, which is characterized in that
Include the following steps：
(1) cement, flyash, silicon ash, swelling agent, river sand and basalt are taken, is stirred for mixing using rotary mixing and blending machine
It closes uniformly, be uniformly mixed material；
(2) high-efficiency water-reducing agent of poly-carboxylic acid is added to the water, stirs to get uniform aqueous solvent, be slowly added into above-mentioned mixture
In, then the running parameter of regulating rotating type mixing and blending machine is mixed, and be uniformly mixed slurry；
(3) microfilament steel fibre is added into above-mentioned mixture slurry and microfilament end hooks type steel fibers, then regulating rotating type is mixed again
The running parameter for closing blender is mixed, and national standard blanks and moulding and conserving is finally pressed, you can it is super to obtain the assorted fibre enhancing
Strong concrete.
10. the preparation method of assorted fibre enhancing ultra high strength concrete according to claim 9, it is characterised in that：
The running parameter of rotary mixing and blending machine is in step (1)：Rotary speed that rotor is counterclockwise is 130-170r/min, is mixed
It is 20-40r/min to close container and rotate clockwise speed, and rotor is opposite with mixing vessel direction of rotation.Incorporation time is 100-
140S；
The running parameter of rotary mixing and blending machine is in step (2)：Rotary speed that rotor is counterclockwise is 280-320r/min, is mixed
It is 20-40r/min to close container and rotate clockwise speed, and rotor is with mixing vessel direction of rotation on the contrary, incorporation time is 300-
420S；
The running parameter of rotary mixing and blending machine is in step (3)：Rotary speed that rotor is counterclockwise is 280-320r/min, is mixed
It is 20-40r/min to close container and rotate clockwise speed, and rotor is with mixing vessel direction of rotation on the contrary, incorporation time is 100-
140S。
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| CN110698113A (en) * | 2019-10-30 | 2020-01-17 | 上海理迪道具有限公司 | Rock-imitating decorative wall and manufacturing method thereof |
| CN112624695A (en) * | 2020-12-21 | 2021-04-09 | 青岛光大集团工程有限公司 | High-strength high-performance concrete and preparation method thereof |
| CN113480256A (en) * | 2021-06-29 | 2021-10-08 | 成都宏基建材股份有限公司 | STC (super-high-temperature-coefficient) ultrahigh-toughness concrete with high working performance and production method thereof |
| CN113800949A (en) * | 2021-09-02 | 2021-12-17 | 台州普立德建筑科技有限公司 | Hybrid fiber light wallboard and processing method thereof |
| CN114920478A (en) * | 2022-05-17 | 2022-08-19 | 重庆三峡学院 | Anti-cracking and anti-impact hybrid fiber concrete and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110698113A (en) * | 2019-10-30 | 2020-01-17 | 上海理迪道具有限公司 | Rock-imitating decorative wall and manufacturing method thereof |
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| CN113480256B (en) * | 2021-06-29 | 2022-08-30 | 成都宏基建材股份有限公司 | STC (super-high-temperature-coefficient) ultrahigh-toughness concrete with high working performance and production method thereof |
| CN113800949A (en) * | 2021-09-02 | 2021-12-17 | 台州普立德建筑科技有限公司 | Hybrid fiber light wallboard and processing method thereof |
| CN114920478A (en) * | 2022-05-17 | 2022-08-19 | 重庆三峡学院 | Anti-cracking and anti-impact hybrid fiber concrete and preparation method thereof |
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