CN106082795A - Graphene oxide strengthens prestressed pore passage grouting material and preparation method thereof - Google Patents
Graphene oxide strengthens prestressed pore passage grouting material and preparation method thereof Download PDFInfo
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- CN106082795A CN106082795A CN201610393835.7A CN201610393835A CN106082795A CN 106082795 A CN106082795 A CN 106082795A CN 201610393835 A CN201610393835 A CN 201610393835A CN 106082795 A CN106082795 A CN 106082795A
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- Prior art keywords
- graphene oxide
- grouting material
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- water
- pore passage
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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
- 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
-
- 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
- C04B2111/70—Grouts, e.g. injection mixtures for cables for prestressed concrete
-
- 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
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- 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
A kind of graphene oxide strengthens prestressed pore passage grouting material, it is characterized in that: described grouting material is prepared by each component of following weight portion: cement 800～1000 parts, flyash 50～150 parts, graphene oxide 2～20 parts, extender 80～120 parts, high efficiency water reducing agent 12～18 parts, corrosion inhibitor 30～50 parts, water 300～390 parts.The present invention has graphene oxide as reinforcing material, and add the chemical admixtures such as extender and corrosion inhibitor, preparation for prestressed pore passage grouting material, to solve the problems such as the performance inconsistencies such as the intensity of conventional grout material, fluidity, bleeding, change in volume are bigger, thus the advantage meeting the requirement of post-tensioned concrete structure construction.
Description
Technical field
The invention belongs to civil engineering material field, relate to a kind of graphene oxide strengthen prestressed pore passage grouting material and
Its preparation method.
Background technology
Post-tensioned concrete structure is to penetrate deformed bar in the reserving hole channel of concrete component, then carries out
Stretch-draw and anchoring, finally pour into grouting material in duct and form bonding stress, and it is excellent that it has that crack resistance is good, rigidity is big etc.
Point, thus obtained increasingly being widely applied in rise long-span structure and science of bridge building.
Prestressed pore passage grouting material is for safety and the durability important of prestressed reinforced concrete construction.Grouting
Material should be full, to ensure prestressed effective transmission, should have good durability, to provide deformed bar etc. simultaneously
Extra anti-corrosion protection.The performance inconsistencies such as the intensity of conventional cement slurry, fluidity, bleeding, change in volume are bigger, it is difficult to meet
The technology requirement of stress duct grouting, therefore need develop the prestressed pore passage grouting material of a kind of dependable performance.
Along with the development of nanotechnology, its skin effect, small-size effect and macro quanta tunnel effect, in every field
All show good application prospect, by nano material at American National Natural Science Fund In The Light committee's (NSF) structural material and mechanics
One of primary study direction has been listed in research in civil engineering in.Graphene is to be currently known that intensity in material is the highest, toughness
The nano material that best, specific area is maximum；Graphene oxide is the intermediate product being prepared Graphene by graphite oxidation, and it exists big
The active group (such as hydroxyl, carboxyl and epoxy radicals etc.) of amount can make the distance between graphite flake layer expand and have hydrophilic, holds
Easily it is prepared as nano dispersion fluid or intercalated compound by dispersion, widely should so that it has in cement-base composite material field
Use prospect.
Summary of the invention
The present invention is directed to the above-mentioned deficiency of prior art, using graphene oxide as reinforcing material, and add extender with
The chemical admixtures such as corrosion inhibitor, for the preparation of prestressed pore passage grouting material, to solve the intensity of conventional grout material, flowing
The problems such as the performance inconsistencies such as degree, bleeding, change in volume are bigger, thus meet the requirement of post-tensioned concrete structure construction
Graphene oxide strengthens prestressed pore passage grouting material.
In order to solve above-mentioned technical problem, the technical solution used in the present invention is: a kind of graphene oxide strengthens prestressing force
Duct grouting material, described grouting material prepared by each component of following weight portion: cement 800～1000 parts, flyash 50～
150 parts, graphene oxide 2～20 parts, extender 80～120 parts, high efficiency water reducing agent 12～18 parts, corrosion inhibitor 30～50 parts, water
300～390 parts.
Cement of the present invention is portland cement or Portland cement, and intensity is not less than 42.5 strength grades.
Flyash of the present invention is F class flyash, specific surface area >=400m2/ kg, water demand ratio≤95%, burns and loses
Amount≤5.0%.Why the present invention makes above-mentioned restriction, is because the content according to contained calcium oxide, and flyash can be divided into F class
(low calcium ash) and C class (high calcium ash).Containing a certain amount of free calcium oxide in C class ash, if improper use, could as admixture
A series of consequences such as the volume stability of cement-base composite material can be caused bad, therefore emphasize to use F class ash.Additionally, powder
Why coal ash can become the most widely used admixture, it is critical only that it has three big effect (active effect, shape effect
And micro aggregate effect).Specific surface area is the biggest, then active effect is the highest, micro aggregate effect is the most notable；Water demand ratio is the least, then shape
State effect is the most notable；Loss on ignition is the least, shows that carbon unburned in flyash is for the component such as water reducer and graphene oxide
Adsorb the fewest；Therefore the regulation of above three index is for ensureing the limit that the intensity of grouting material and workability are done
Fixed.
Extender of the present invention is that calcium sulphoaluminate class extender is (as Qingdao Hong Sha macromolecular material company limited produces
HEA-1 extender, HEA-1 high-efficiency concrete expansion admixture), why adding extender is to make grouting material produce microdilatancy,
Ensure that and bond between energy and hole wall, so that prestressing force can effectively transmit when grouting material uses.
Water reducer of the present invention is that the water-reducing rate retarding-type superplasticizer more than 20% is (such as Jiangsu Su Bote green wood
Material limited company produces(slow setting, pumping) concrete high efficiency water reducing agent,Polycarboxylic acids high-thin arch dam diminishing
Agent), why use the water reducer of this specification to be because its workability and intensity being possible not only to improve grouting material, also have
Have and delay setting time and protect the effect collapsed.
Corrosion inhibitor of the present invention is that doped corrosion inhibitor is (such as Beijing Rui Shengte building materials company limited GST compounded amino
Alcohols organic reinforcing steel bar rust inhibitor), it can form adsorbed film and oxide-film on deformed bar surface, plays blocking-up harmful substance
With contacting of rebar surface, the effect stoping or delaying corrosion to occur, thus prevent prestressing force disappear cause pipeline to cave in.
Graphene oxide of the present invention is water solublity single-layer graphene oxide powder, sheet footpath 0.5～5 μm, thickness 0.8
～1.2nm, hydroxy radical content is not less than 0.005%.Graphene is that the monoatomic layer being linked to be with sp2 hybrid structure by carbon atom is constituted
(thickness is only 0.34nm), but it is expensive, therefore uses graphene oxide in cement-base composite material at present more, and it is
Prepared the intermediate product of Graphene by graphite oxidation, there is substantial amounts of active group (such as hydroxyl, carboxyl and epoxy radicals etc.), can make
Obtain the distance between graphite flake layer expand and there is hydrophilic, be easily dispersed and be prepared as nano dispersion fluid or form intercalation synthesis
Thing.Graphene oxide intensity is high, toughness is big, and containing a large amount of active groups on it, can promote the growth of aquation crystal, and right
The shape of hydrated product has template regulating and controlling effect, is more likely formed shape is regular, volume is small lenticular or petal-like structures,
Cross-section morphology structure is the tightst, and aperture is more uniform, tiny, greatly improves the physical and mechanical property of grouting material, and
Reduce bleeding rate.
The present invention also provides for a kind of graphene oxide and strengthens the preparation method of prestressed pore passage grouting material, preparation process bag
Include: (1) weighs each raw material by formula proportion；
(2) the most first by cement, flyash, extender and corrosion inhibitor dry mixing 25-30s in blender, it is subsequently poured into and joins
The water stirring 90-100s of the 50-90% of side's total water consumption obtains slurry, stirs with slurry in water reducer is then poured into blender
120-150s, finally mixes graphene oxide with remaining water in container；
(3) graphene oxide after stirring and the mixed liquor remaining water continue stirring with slurry in pouring blender into
90-100s, i.e. obtains graphene oxide and strengthens prestressed pore passage grouting material.
The present invention compared with prior art, has performance and an advantage of following uniqueness:
(1) graphene oxide is used for the preparation of grouting material by the present invention first, greatly improves the physics of grouting material
Mechanical property, and reduce bleeding rate.
(2) grouting material of the present invention is mixed with corrosion inhibitor, greatly improves the durability of prestressed reinforced concrete construction.
(3) grouting material of the present invention is mixed with extender, makes the slurry that should produce contraction create microdilatancy, greatly
Improve volume stability, it is ensured that the bonding between grouting material and hole wall, so that prestressing force can effectively transmit.
(4) grouting material of the present invention is mixed with retarding-type superplasticizer, greatly improves the mobility of grouting material, and
Delay setting time, it is ensured that the workability of grouting material.
(5) grouting material of the present invention is mixed with trade waste flyash, not only energy-conserving and environment-protective, and gives full play to powder
The active effect of coal ash, shape effect and micro aggregate effect, it is ensured that the later stage performance of grouting material.
(6) present invention is by the specific proportioning of following each component: cement 800～1000 parts, flyash 50～150 parts, oxygen
Functionalized graphene 2～20 parts, extender 80～120 parts, high efficiency water reducing agent 12～18 parts, corrosion inhibitor 30～50 parts, water 300～390
Part；Each component influences each other, the most collaborative so that final grouting material has the intensity of excellence, adhesive property and durable
Performance.
Accompanying drawing explanation
Fig. 1 preparation method of the present invention process chart.
Detailed description of the invention
Below by embodiment, the present invention is described in further detail, but the present invention is not limited solely to following example.
Embodiment 1
Calculation by weight, each raw material components of the present embodiment grouting material is as follows: include cement 900 parts, flyash 135
Part, graphene oxide 15 parts, extender 80 parts, high efficiency water reducing agent 12 parts, corrosion inhibitor 42 parts, 340 parts of water.
Preparation process is as follows: weighs each raw material by formula proportion, first cement, flyash, extender and corrosion inhibitor is existed
Dry mixing 25-30s in blender, the most first pour into formula total water consumption 80% water stirring 90-100s, then water reducer is fallen
Stir 120-150s with slurry in entering blender, finally the water of graphene oxide with remaining 20% is mixed in container, stir
Continue stirring 90-100s with slurry in mixed liquor is poured into after mixing uniformly blender, i.e. obtain graphene oxide and strengthen prestressing force
Duct grouting material.Technical specification is as shown in table 1.
The technical specification of table 1 embodiment 1
Embodiment 2
Calculation by weight, each raw material components of the present embodiment grouting material is as follows: include cement 1000 parts, flyash80 Part, graphene oxide 11 parts, extender 90 parts, high efficiency water reducing agent 15 parts, corrosion inhibitor 35 parts, 330 parts of water.
Preparation method is with embodiment 1.Technical specification is as shown in table 2.
The technical specification of table 2 embodiment 2
Embodiment 3
Calculation by weight, each raw material components of the present embodiment grouting material is as follows: include cement 1050 parts, flyash 50
Part, graphene oxide 6 parts, extender 100 parts, high efficiency water reducing agent 18 parts, corrosion inhibitor 30 parts, 330 parts of water.
Preparation method is with embodiment 1.Technical specification is as shown in table 3.
The technical specification of table 3 embodiment 3
Knowable to above-described embodiment, technical scheme obtain grouting material have excellence workability, intensity,
Volume stability and durability；Solve the performance inconsistencies such as the intensity of conventional grout material, fluidity, bleeding, change in volume
The problem such as bigger, thus meet the requirement of post-tensioned concrete structure construction.
Claims (9)
1. a graphene oxide strengthens prestressed pore passage grouting material, it is characterised in that: described grouting material is by following weight
Part each component prepare: cement 800～1000 parts, flyash 50～150 parts, graphene oxide 2～20 parts, extender 80～
120 parts, high efficiency water reducing agent 12～18 parts, corrosion inhibitor 30～50 parts, water 300～390 parts.
Graphene oxide the most according to claim 1 strengthens prestressed pore passage grouting material, it is characterised in that: described water
Mud is portland cement or Portland cement, and intensity is not less than 42.5 strength grades.
Graphene oxide the most according to claim 1 strengthens prestressed pore passage grouting material, it is characterised in that: described powder
Coal ash is F class flyash, specific surface area >=400m2/ kg, water demand ratio≤95%, loss on ignition≤5.0%.
Graphene oxide the most according to claim 1 strengthens prestressed pore passage grouting material, it is characterised in that: described is swollen
Swollen dose is calcium sulphoaluminate class extender.
Graphene oxide the most according to claim 1 strengthens prestressed pore passage grouting material, it is characterised in that: described subtracts
Water preparation is the water-reducing rate retarding-type superplasticizer more than 20%.
Graphene oxide the most according to claim 1 strengthens prestressed pore passage grouting material, it is characterised in that: described resistance
Rust agent is doped corrosion inhibitor.
Graphene oxide the most according to claim 1 strengthens prestressed pore passage grouting material, it is characterised in that: described oxygen
Functionalized graphene is water solublity single-layer graphene oxide powder, and sheet footpath 0.5～5 μm, thickness 0.8～1.2nm, hydroxy radical content is not less than
0.005%.
8. the preparation of prestressed pore passage grouting material is strengthened according to the graphene oxide described in claim 1-7 any claim
Method, it is characterised in that: preparation process includes:
(1) each raw material is weighed by formula proportion；
(2) the most first by cement, flyash, extender and corrosion inhibitor dry mixing 25-30s in blender, it is subsequently poured into formula total
The water stirring 90-100s of the 50-90% of water consumption obtains slurry, stirs 120-with slurry in water reducer is then poured into blender
150s, finally mixes graphene oxide with remaining water in container；
(3) graphene oxide after stirring and the mixed liquor remaining water continue stirring 90-with slurry in pouring blender into
100s, i.e. obtains graphene oxide and strengthens prestressed pore passage grouting material.
Graphene oxide the most according to claim 8 strengthens the preparation method of prestressed pore passage grouting material, and its feature exists
In: water is total water consumption 80% poured in step (2).
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| CN201610393835.7A CN106082795A (en) | 2016-06-06 | 2016-06-06 | Graphene oxide strengthens prestressed pore passage grouting material and preparation method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107337363A (en) * | 2016-12-30 | 2017-11-10 | 江苏苏博特新材料股份有限公司 | A kind of cement concrete durability strengthens additive |
| CN108046682A (en) * | 2017-12-08 | 2018-05-18 | 浙江共创建材科技有限公司 | A kind of sleeve grouting material |
| CN108147689A (en) * | 2017-12-31 | 2018-06-12 | 江苏申御特种建材有限公司 | A kind of magnesia antimitotic agent of graphene oxide and preparation method thereof |
| CN109503092A (en) * | 2018-12-24 | 2019-03-22 | 河南城建学院 | Early strong impervious, cement base grouting material of height containing graphene oxide and preparation method thereof |
| CN111393064A (en) * | 2020-03-26 | 2020-07-10 | 浙江和业科技有限公司 | Ultra-slow-release polycarboxylic acid pumping agent and preparation method thereof |
| CN113149540A (en) * | 2021-01-14 | 2021-07-23 | 中国矿业大学 | Grouting material based on industrial graphene oxide and preparation method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107337363A (en) * | 2016-12-30 | 2017-11-10 | 江苏苏博特新材料股份有限公司 | A kind of cement concrete durability strengthens additive |
| CN107337363B (en) * | 2016-12-30 | 2019-12-27 | 江苏苏博特新材料股份有限公司 | Cement concrete durability enhancing additive |
| CN108046682A (en) * | 2017-12-08 | 2018-05-18 | 浙江共创建材科技有限公司 | A kind of sleeve grouting material |
| CN108147689A (en) * | 2017-12-31 | 2018-06-12 | 江苏申御特种建材有限公司 | A kind of magnesia antimitotic agent of graphene oxide and preparation method thereof |
| CN109503092A (en) * | 2018-12-24 | 2019-03-22 | 河南城建学院 | Early strong impervious, cement base grouting material of height containing graphene oxide and preparation method thereof |
| CN111393064A (en) * | 2020-03-26 | 2020-07-10 | 浙江和业科技有限公司 | Ultra-slow-release polycarboxylic acid pumping agent and preparation method thereof |
| CN113149540A (en) * | 2021-01-14 | 2021-07-23 | 中国矿业大学 | Grouting material based on industrial graphene oxide and preparation method thereof |
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