CN114988793A - Ultra-early-strength UHPC premix for bridge expansion joints and manufacturing method thereof - Google Patents
Ultra-early-strength UHPC premix for bridge expansion joints and manufacturing method thereof Download PDFInfo
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- CN114988793A CN114988793A CN202210559110.6A CN202210559110A CN114988793A CN 114988793 A CN114988793 A CN 114988793A CN 202210559110 A CN202210559110 A CN 202210559110A CN 114988793 A CN114988793 A CN 114988793A
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- China
- Prior art keywords
- agent
- early
- stirring
- premix
- strength
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000011374 ultra-high-performance concrete Substances 0.000 title claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 42
- 239000011398 Portland cement Substances 0.000 claims abstract description 27
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 23
- 239000000835 fiber Substances 0.000 claims abstract description 23
- 239000010959 steel Substances 0.000 claims abstract description 23
- 239000006004 Quartz sand Substances 0.000 claims abstract description 19
- 230000003487 anti-permeability effect Effects 0.000 claims abstract description 14
- 239000000843 powder Substances 0.000 claims abstract description 14
- 239000013008 thixotropic agent Substances 0.000 claims abstract description 14
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 13
- 239000011707 mineral Substances 0.000 claims abstract description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000004568 cement Substances 0.000 claims abstract description 11
- 229910021487 silica fume Inorganic materials 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000002994 raw material Substances 0.000 claims abstract 2
- 238000003756 stirring Methods 0.000 claims description 50
- 239000004570 mortar (masonry) Substances 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- 239000002002 slurry Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 abstract description 13
- 230000036571 hydration Effects 0.000 abstract description 9
- 238000006703 hydration reaction Methods 0.000 abstract description 9
- 239000011148 porous material Substances 0.000 abstract description 6
- 239000002253 acid Substances 0.000 abstract description 3
- 239000003638 chemical reducing agent Substances 0.000 abstract description 3
- 238000013329 compounding Methods 0.000 abstract description 3
- 238000009826 distribution Methods 0.000 abstract description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052802 copper Inorganic materials 0.000 abstract description 2
- 239000010949 copper Substances 0.000 abstract description 2
- 239000004567 concrete Substances 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004574 high-performance concrete Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00663—Uses not provided for elsewhere in C04B2111/00 as filling material for cavities or the like
-
- 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)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to the technical field of traffic engineering materials, and discloses an ultra-early-strength UHPC premix for a bridge expansion joint, which comprises the following raw materials in parts by weight: portland cement
Quartz sand
Finely ground mineral powder
Silica fume
Inorganic early strength agent
Viscosity-reducing thixotropic agent
Nano anti-permeability agent
Internal curing agent
Copper plated steel fiber
Description
Technical Field
The invention relates to the technical field of traffic engineering materials, in particular to an ultra-early-strength UHPC premix for bridge expansion joints and a manufacturing method thereof.
Background
The UHPC ultra-high performance concrete is a material designed according to the compact heap theory, the ultra-high performance concrete is characterized by having ultra-high strength, high toughness, low permeability and high volume stability, the ultra-high performance concrete is known as the three-high performance concrete, namely, the ultra-high performance concrete has high durability, high workability and high strength, and is called as 21 st century concrete.
The pouring of the C50 steel fiber concrete for newly-built bridge expansion joints is relatively mature, but for the rush repair and replacement of the existing bridge expansion joints, because the early strength development of the C50 steel fiber concrete is slow and cannot meet the requirement of quick (1-3h) open traffic, the quick-setting concrete prepared on site by the double-quick cement and the quick-setting concrete premix prepared by the double-quick cement can meet the requirement of quick (1-3h) open traffic, but because the later strength increase rate is low and even the defects of poor shrinkage, impermeability and volume stability and the like, the bridge expansion joints need to be repeatedly maintained, and the operation and maintenance cost is increased, so the ultra-early strength UHPC premix for the bridge expansion joints and the manufacturing method thereof are provided to solve the problems.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides the ultra-early-strength UHPC premix for the bridge expansion joint and the manufacturing method thereof, which have the advantages of high later strength increase rate, good impermeability and volume stability and the like, and solve the problems that the bridge expansion joint rush-repair material has low early strength and can not realize quick open traffic and the double-quick cement column quick-setting concrete has durability.
(II) technical scheme
In order to achieve the purposes of high later strength increase rate and good impermeability and volume stability, the invention provides the following technical scheme: portland cement
Quartz sand
Finely ground mineral powder
Silica fume
Inorganic early strength agent
Viscosity-reducing thixotropic agent
Nano anti-permeability agent
Internal curing agent
Copper plated steel fiber
Preferably, the ordinary portland cement
The type of the cement is 52.5 ordinary portland cement.
Preferably, the quartz sand
The particle diameter of (A) is 0.1-0.3 mm.
The invention aims to solve another technical problem of providing an ultra-early-strength UHPC premix for bridge expansion joints and a manufacturing method thereof, wherein the premix comprises the following steps:
1) sequentially putting 52.5 ordinary portland cement, 0.1-0.3mm quartz sand, ground mineral powder, silica fume and an inorganic early strength agent into a CAJ-30 mortar stirrer for dry stirring at a speed of about 50r/min for 1min30 s;
2) then, all water is added at a uniform speed, and slow stirring is continued at a stirring speed of 80r/min for 1 min;
3) then adding the viscosity-reducing thixotropic agent and the nano anti-permeability agent, and continuously stirring quickly at the stirring speed of 180r/min for 4 min;
4) then adding the internal curing agent, and quickly stirring at the speed of 200r/min for 3 min;
5) adding the copper-plated steel fibers, stirring at the speed of 60r/min, and uniformly adding the copper-plated steel fibers while stirring until the copper-plated steel fibers are well wrapped by the slurry and uniformly distributed, wherein the time is 30 s.
(III) advantageous effects
Compared with the prior art, the invention provides the ultra-early-strength UHPC premix compound for the bridge expansion joint and the manufacturing method thereof, and the premix compound has the following beneficial effects:
1. the ultra-early-strength UHPC premix for the bridge expansion joint and the manufacturing method thereof are characterized in that the ultra-early-strength UHPC premix is prepared by compounding an inorganic early-strength agent to accelerate the early hydration speed of ordinary portland cement, adding a viscosity-reducing thixotropic agent to reduce the viscosity of the material, adding a nano anti-permeability agent to improve the pore structure and pore distribution of a hydration product, adding an internal curing agent to adjust the hydration heat release temperature curve of the cement, taking the ordinary portland cement as a main cementing material, quartz sand as an aggregate, mineral micro powder as an active mixing material, adding a polycarboxylic acid water reducing agent and the like.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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 obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
The first embodiment is as follows: portland cement
Quartz sand
Finely ground mineral powder
Silica fume
Inorganic early strength agent
Viscosity-reducing thixotropic agent
Nano anti-permeability agent
Internal curing agent
Copper-plated steel fiber
Ordinary portland cement
The type of the cement is 52.5 ordinary portland cement and quartz sand
The particle diameter of (A) is 0.1-0.3 mm.
A preparation method of an ecological health-preserving foot bath bag packaged by traditional Chinese medicine bags comprises the following steps:
1) putting 270 parts of 52.5 ordinary portland cement, 280 parts of quartz sand of 0.1-0.3mm, 150 parts of ground mineral powder, 70 parts of silica fume and 40 parts of inorganic early strength agent into a CAJ-30 mortar stirrer in sequence for dry stirring at a speed of about 50r/min for 1min30 s;
2) then, all water is added at a uniform speed, and slow stirring is continued, wherein the stirring speed is 80r/min, and the stirring time is 1 min;
3) then adding 20 parts of viscosity-reducing thixotropic agent and 5 parts of nano anti-permeability agent, and continuously stirring quickly at the stirring speed of 180r/min for 4 min;
4) then adding 3 parts of internal curing agent and stirring quickly at the stirring speed of 200r/min for 3 min;
5) and adding 30 parts of copper-plated steel fiber, stirring slowly at the stirring speed of 60r/min, and uniformly adding the copper-plated steel fiber while stirring until the copper-plated steel fiber is well wrapped by the slurry and uniformly distributed, wherein the time is 30 s.
Example two: portland cement
Quartz sand
Finely ground ore powder
Silica fume
Inorganic early strength agent
Viscosity-reducing thixotropic agent
Nano anti-permeability agent
Internal curing agent
Copper-plated steel fiber
Ordinary portland cement
The type of the cement is 52.5 ordinary portland cement and quartz sand
The particle diameter of (A) is 0.1-0.3 mm.
A preparation method of an ecological health-preserving traditional Chinese medicine bag foot bath bag comprises the following steps:
1) sequentially putting 420 parts of 52.5 ordinary Portland cement, 600 parts of quartz sand with the thickness of 0.1-0.3mm, 300 parts of ground mineral powder, 120 parts of silica fume and 80 parts of inorganic early strength agent into a CAJ-30 mortar stirrer for dry stirring at a speed of about 50r/min for 3 min;
2) then, all water is added at a uniform speed, and slow stirring is continued at a stirring speed of 80r/min for 2 min;
3) then adding 50 parts of viscosity-reducing thixotropic agent and 20 parts of nano anti-permeability agent, and continuously stirring at the speed of 180r/min for 8 min;
4) then 10 parts of internal curing agent is added and stirred quickly, the stirring speed is 200r/min, and the stirring time is 6 min;
5) adding 60 parts of copper-plated steel fibers, stirring slowly at the stirring speed of 60r/min, and uniformly adding the copper-plated steel fibers while stirring until the copper-plated steel fibers are well wrapped by the slurry and uniformly distributed, wherein the time is 1 min.
Example three: portland cement
Quartz sand
Finely ground mineral powder
Silica fume
Inorganic early strength agent
Viscosity-reducing thixotropic agent
Nano anti-permeability agent
Internal curing agent
Copper-plated steel fiber
Ordinary portland cement
The cement type is 52.5 common Portland cement and quartz sand
The particle diameter of (A) is 0.1-0.3 mm.
1) Putting 345 parts of 52.5 ordinary portland cement, 440 parts of quartz sand of 0.1-0.3mm, 225 parts of ground mineral powder, 95 parts of silica fume and 60 parts of inorganic early strength agent into a CAJ-30 mortar stirrer in sequence for dry stirring and slow stirring, wherein the stirring speed is about 50r/min and the stirring time is 2 min;
2) then, all water is added at a uniform speed, slow stirring is continued, the stirring speed is 80r/min, and the stirring time is 1min30 s;
3) then adding 35 parts of viscosity-reducing thixotropic agent and 12.5 parts of nano anti-permeability agent, and continuously and quickly stirring at the stirring speed of 180r/min for 6 min;
4) then 6.5 parts of internal curing agent is added and stirred quickly, the stirring speed is 200r/min, and the stirring time is 4 min;
5) adding 45 parts of copper-plated steel fiber, stirring at the speed of 60r/min, and uniformly adding the copper-plated steel fiber while stirring until the copper-plated steel fiber is well wrapped by the slurry and uniformly distributed, wherein the time is 45 min.
The invention has the beneficial effects that: the ultra-early-strength UHPC premix is prepared by promoting the early hydration speed of ordinary portland cement by compounding an inorganic early strength agent, reducing the viscosity of the material by adding a viscosity-reducing thixotropic agent, improving the pore structure and pore distribution of a hydration product by adding a nano anti-permeability agent, adjusting the hydration heat release temperature curve of the cement by adding an internal curing agent, taking ordinary portland cement as a main cementing material, quartz sand as an aggregate, mineral micro powder as an active mixing material, adding a polycarboxylic acid water reducing agent and the like.
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 (4)
1. The ultra-early-strength UHPC premix for the bridge expansion joint is characterized by comprising the following raw materials in parts by weight: portland cement
Quartz sand
Finely ground mineral powder
Silica fume
Inorganic early strength agent
Viscosity-reducing thixotropic agent
Nano anti-permeability agent
Internal curing agent
Copper-plated steel fiber
2. The ultra-early-strength UHPC premix for bridge expansion joints according to claim 1, wherein the ordinary portland cement is used as a main component of the premix
The type of the cement is 52.5 ordinary portland cement.
3. The ultra-early-strength UHPC premix for bridge expansion joints according to claim 1, wherein the quartz sand is
The particle diameter of (A) is 0.1-0.3 mm.
4. An ultra-early-strength UHPC premix for bridge expansion joints and a manufacturing method thereof are characterized by comprising the following steps:
1) sequentially putting 52.5 ordinary portland cement, 0.1-0.3mm quartz sand, ground mineral powder, silica fume and an inorganic early strength agent into a CAJ-30 mortar stirrer for dry stirring at a speed of about 50r/min for 1min30 s;
2) then, all water is added at a uniform speed, and slow stirring is continued, wherein the stirring speed is 80r/min, and the stirring time is 1 min;
3) then adding the viscosity-reducing thixotropic agent and the nano anti-permeability agent, and continuously stirring quickly at the stirring speed of 180r/min for 4 min;
4) then adding the internal curing agent, and quickly stirring at the speed of 200r/min for 3 min;
5) adding the copper-plated steel fibers, stirring at the speed of 60r/min, and uniformly adding the copper-plated steel fibers while stirring until the copper-plated steel fibers are well wrapped by the slurry and uniformly distributed, wherein the time is 30 s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210559110.6A CN114988793A (en) | 2022-05-22 | 2022-05-22 | Ultra-early-strength UHPC premix for bridge expansion joints and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210559110.6A CN114988793A (en) | 2022-05-22 | 2022-05-22 | Ultra-early-strength UHPC premix for bridge expansion joints and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114988793A true CN114988793A (en) | 2022-09-02 |
Family
ID=83028054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210559110.6A Pending CN114988793A (en) | 2022-05-22 | 2022-05-22 | Ultra-early-strength UHPC premix for bridge expansion joints and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114988793A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108083705A (en) * | 2018-01-19 | 2018-05-29 | 江西省高速公路投资集团有限责任公司 | A kind of joint of bridge surpasses concrete with high cracking resistance and preparation method thereof |
| CN110467391A (en) * | 2019-07-11 | 2019-11-19 | 上海复培新材料科技有限公司 | Bridge connecting sewing concrete special powder, its preparation and construction method |
| CN112592132A (en) * | 2020-12-24 | 2021-04-02 | 中铁第四勘察设计院集团有限公司 | Bridge splice joint early-strength UHPC material and preparation method thereof |
| CN113307578A (en) * | 2021-06-24 | 2021-08-27 | 江苏创为交通科技发展有限公司 | Multifunctional UHPC and preparation method thereof |
| CN113416046A (en) * | 2021-08-13 | 2021-09-21 | 中铁七局集团第三工程有限公司物贸分公司 | Super-high performance concrete for paving orthogonal special-shaped steel bridge deck |
| CN113716915A (en) * | 2021-08-19 | 2021-11-30 | 华新超可隆新型建材科技(黄石)有限公司 | Sprayed ultrahigh-performance concrete for corrosion prevention and reinforcement |
-
2022
- 2022-05-22 CN CN202210559110.6A patent/CN114988793A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108083705A (en) * | 2018-01-19 | 2018-05-29 | 江西省高速公路投资集团有限责任公司 | A kind of joint of bridge surpasses concrete with high cracking resistance and preparation method thereof |
| CN110467391A (en) * | 2019-07-11 | 2019-11-19 | 上海复培新材料科技有限公司 | Bridge connecting sewing concrete special powder, its preparation and construction method |
| CN112592132A (en) * | 2020-12-24 | 2021-04-02 | 中铁第四勘察设计院集团有限公司 | Bridge splice joint early-strength UHPC material and preparation method thereof |
| CN113307578A (en) * | 2021-06-24 | 2021-08-27 | 江苏创为交通科技发展有限公司 | Multifunctional UHPC and preparation method thereof |
| CN113416046A (en) * | 2021-08-13 | 2021-09-21 | 中铁七局集团第三工程有限公司物贸分公司 | Super-high performance concrete for paving orthogonal special-shaped steel bridge deck |
| CN113716915A (en) * | 2021-08-19 | 2021-11-30 | 华新超可隆新型建材科技(黄石)有限公司 | Sprayed ultrahigh-performance concrete for corrosion prevention and reinforcement |
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