CN109320167A - Cracking resistance/corrosion resistant concrete and its preparation method and application, concrete pressure pipe and preparation method thereof - Google Patents
Cracking resistance/corrosion resistant concrete and its preparation method and application, concrete pressure pipe and preparation method thereof Download PDFInfo
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- CN109320167A CN109320167A CN201811349363.0A CN201811349363A CN109320167A CN 109320167 A CN109320167 A CN 109320167A CN 201811349363 A CN201811349363 A CN 201811349363A CN 109320167 A CN109320167 A CN 109320167A
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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
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/26—Corrosion of reinforcement resistance
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/56—Compositions suited for fabrication of pipes, e.g. by centrifugal casting, or for coating concrete pipes
-
- 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 belongs to concrete pressure pipe technical fields, it is related to a kind of cracking resistance/corrosion resistant concrete, is mainly prepared by the raw material of following parts by weight: 0.5~2 part of cement, 0.04~0.24 part of flyash, 1.6~2.2 parts of fine aggregate, 2.8~3.5 parts of coarse aggregate, 0.001~0.006 part of basalt fibre, 0.03~0.1 part of corrosion inhibitor, 0.008~0.05 part of water-reducing agent and 0.1~0.8 part of water.The present invention improves the corrosion resistance of concrete, crack-resistant performance of concrete is also improved simultaneously, it is significant that sea water intrusion performance boost is integrally resisted to concrete product, has widened concrete pressure pipe in the service life of corrosive environment, and effectively reduce the cost of product.
Description
Technical field
The invention belongs to concrete pressure pipe technical field, in particular to a kind of cracking resistance/corrosion resistant concrete and its
Preparation method and application, concrete pressure pipe and preparation method thereof.
Background technique
At this stage, concrete pressure pipe is mainly used in industries, the products such as water conservancy, municipal administration, farmland pipe network, electric power and mainly wraps
Include prestressed concrete pipe (YYG, SYG), Prestressed concrete cylinder pipe (PCCP), concrete reinforced pipe (RCP) and concrete-steel
Cylinder pipe of concrete (RCCP) etc. and its corresponding push pipe.Pumped (conveying) medium is generally surface water, rainwater, raw water reservoir, sanitary sewage
Etc. the weaker medium of corrosivity.Concrete pressure pipe, which has, saves that metal, low energy consumption, durability, maintenance cost are few, service life
The features such as long and economy, thus it is very popular.
But circulating water pipeline all selects seawater in diversion and factory outside the factory of the thermoelectricity, nuclear power plant in recent years, built by the sea
As pumped (conveying) medium, concrete pressure pipe is often chosen for the tubing of conveying seawater because of its unique advantage.But in seawater
Cl-、Plasma content is high, enters inside concrete by capillary of concrete surface or so and fine crack, to mixed
Solidifying soil pressure solenoid structure erosion is extremely strong, seriously affects the service life of concrete pressure pipe.High sulfur resistive is now mostly used both at home and abroad
Concrete of the hydrochlorate portland cement as the cementitious material configuration pressure pipe of concrete.Such cement advantage is anti-seawater corrosion
Performance be better than ordinary portland cement and portland cement, but disadvantage it is also obvious that be exactly to be formed inside concrete alkalinity not
Foot, is not enough to allow the reinforcing bar of inside concrete to form this thin-wall construction of stable passivation film structure, especially concrete pressure pipe
(protective layer thickness of reinforcing bar is generally smaller), Seawater becomes apparent concrete pressure pipe menace；Further drawback is exactly
Since market demand does not cause manufacturer less very much, and scale is smaller, and quality stability is poor, then has price height, generally
2.5~3 times of ordinary cement, are also influenced by transportation range, promotional value is low.
In addition, maritime concrete industry is also in such a way that closing erosion resistant coating is done on surface, in the outer of concrete pressure pipe
Closing erosion resistant coating is done on surface, but the inner surface of pipeline and is not suitable for.The service life of closing erosion resistant coating is generally 10~15 years, and
The service life of concrete pressure pipe is generally 50 years, and power plant generally requires at least 30 years, due to pressure pipe internal water flow velocity compared with
Greatly, it and carries impurity secretly, very big souring is generated to coating, it reduce the service lifes of erosion resistant coating, more seriously,
If this causes corrosion-inhibiting coating to be detached from, peel off, not only maintenance difficulties are big, these are detached from, the erosion resistant coating of peeling can be involved in normally
In running equipment, interruption of service is caused, consequence is inestimable.
In consideration of it, the present invention is specifically proposed.
Summary of the invention
It is an object of the present invention to provide a kind of cracking resistance/corrosion resistant concretes, improve the corrosion resistance of concrete
Can, while crack-resistant performance of concrete is also improved, and effectively reduce the cost of product, height can be realized at a lower cost
The production of amount improves the applicability of configuration concrete.
It is another object of the present invention to provide a kind of preparation method of cracking resistance/corrosion resistant concrete, this method operations
Simply, easy to implement, its each the advantages of forming raw material, is fully utilized using the concrete that this method is prepared, is had excellent
Different corrosion resistance, cracking resistance index have also obtained very big improvement.
A further object of the present invention, which also resides in, to be provided cracking resistance/corrosion resistant concrete described in one kind and is preparing coagulation soil pressure
Application in solenoid；A kind of concrete pressure pipe；And the preparation method of the concrete pressure pipe.Using coagulation of the invention
The concrete pressure pipe of autochthonal output, probability of ensuring strength of concrete are significantly promoted, and concrete density is high, can effectively prevent sea
The infiltration of harmful ion is immersed in water, it can be ensured that concrete pressure pipe design life.
To achieve the above object, the technical solution adopted by the present invention are as follows:
According to an aspect of the present invention, the present invention provides a kind of cracking resistance/corrosion resistant concrete, mainly by following parts by weight
Raw material be prepared:
It is 0.5~2 part of cement, 0.04~0.24 part of flyash, 1.6~2.2 parts of fine aggregate, 2.8~3.5 parts of coarse aggregate, profound
0.001~0.006 part of military rock fiber, 0.03~0.1 part of corrosion inhibitor, 0.008~0.05 part of water-reducing agent and 0.1~0.8 part of water.
As further preferred technical solution, mainly it is prepared by the raw material of following parts by weight:
0.8~1.2 part of cement, 0.1~0.16 part of flyash, 1.8~2.0 parts of fine aggregate, 3.0~3.25 parts of coarse aggregate,
0.003~0.004 part of basalt fibre, 0.05~0.07 part of corrosion inhibitor, 0.01~0.02 part of water-reducing agent and 0.3~0.5 part of water；
Preferably, it is mainly prepared by the raw material of following parts by weight:
1 part of cement, 0.14 part of flyash, 1.93 parts of fine aggregate, 3.16 parts of coarse aggregate, 0.0033 part of basalt fibre, resistance
0.06 part of agent of rust, 0.014 part of water-reducing agent and 0.4 part of water.
As further preferred technical solution, the cement is ordinary portland cement, preferably P.O42.5 cement；
Preferably, the flyash be F class flyash, preferably II grade and/or I grade of F class flyash, further preferably
I grade of F class flyash；
Preferably, the basalt fibre be chopped basalt fibre, preferably length be 10~14mm, diameter be 15~
30 μm of chopped basalt fibre, further preferably length are 12mm, the chopped basalt fibre that diameter is 15~30 μm；
Preferably, the corrosion inhibitor is concrete resistance rust preservative；
Preferably, the corrosion inhibitor include alkamine corrosion inhibitor, nitrites corrosion inhibitor, phosphoric acid salt corrosion inhibitor,
At least one of sodium benzoate class corrosion inhibitor or compound corrosion inhibitor；
The corrosion inhibitor is preferably compound corrosion inhibitor；
Preferably, the water-reducing agent includes in poly carboxylic acid series water reducer, naphthalene water reducer or ligninsulfonate water-reducing agent
At least one, the water-reducing agent are preferably poly carboxylic acid series water reducer.
As further preferred technical solution, the coarse aggregate is stone；
And/or the fine aggregate is sand；
Preferably, green stone and/or rubble that the stone is 5~25mm of partial size；
Preferably, the sand is natural river sand, fineness modulus 2.3~3.2.
According to another aspect of the present invention, the present invention provides a kind of system of cracking resistance/corrosion resistant concrete as described above
Preparation Method, comprising the following steps:
Each raw material, mixing and discharging are weighed by formula ratio.
As further preferred technical solution, the addition sequence of raw material be followed successively by coarse aggregate, cement, flyash, fine aggregate,
Corrosion inhibitor, basalt fibre, water-reducing agent and water；
Preferably, it the described method comprises the following steps:
According to formula ratio, successively coarse aggregate, cement, flyash, fine aggregate, corrosion inhibitor, basalt fibre are added to mixed
In solidifying soil blender, 30~60s is mixed, then water-reducing agent and water are added in concrete mixer under stiring, then
160~240s is mixed to get the concrete；
Preferably, the drop temperature of the concrete is 10~35 DEG C.
According to another aspect of the present invention, the present invention provides a kind of above-mentioned cracking resistance/corrosion resistant concrete or above-mentioned
Cracking resistance/corrosion resistant concrete made from preparation method is preparing the application in concrete pressure pipe；
Preferably, the concrete pressure pipe is for conveying seawater.
According to another aspect of the present invention, the present invention also provides a kind of concrete pressure pipes, mainly by above-mentioned cracking resistance/
Cracking resistance/corrosion resistant concrete made from corrosion resistant concrete or above-mentioned preparation method is made.
According to another aspect of the present invention, the present invention provides a kind of preparation side of concrete pressure pipe as described above
Method, comprising the following steps:
Cracking resistance/corrosion resistant concrete is poured and builds up concrete duct, then concrete duct is conserved；Maintenance terminates
After demoulded；
Preferably, the time poured is≤30min, preferably 10~28min.
As further preferred technical solution, the maintenance includes natural curing and/or steam curing；
Preferably, it during natural curing, when the intensity of concrete is 3~5MPa, sprinkles water, keeps moistening at least
24 hours；
Preferably, steam curing includes that successively carry out quiet stops stage, temperature rise period, constant temperature stage and temperature-fall period；
Preferably, it is quiet stop the stage include: concreting completion after, it is quiet to stop 1~2 hour；
Preferably, the temperature rise period include: it is quiet stop the stage after, be warming up to 50~60 DEG C, control heating rate is no more than
22 DEG C/h；
Preferably, it is 50~60 DEG C that the constant temperature stage, which includes: thermostat temperature, and constant temperature time is 3~5 hours；
Preferably, it is 1~2 hour that temperature-fall period, which includes: temperature fall time, and control cooling rate is no more than 30 DEG C/h.
Compared with prior art, the beneficial effects of the present invention are:
1, cracking resistance/corrosion resistant concrete provided by the invention, mainly by cement, flyash, coarse aggregate, fine aggregate, the Black Warrior
Rock fiber, corrosion inhibitor, water-reducing agent and water are prepared, and each raw material cooperates, and obtain chemiluminescence, improve concrete
Corrosion resistance, while also improving the cracking resistance of concrete, and cost of material is low, effectively reduces being produced into for product
This, can realize the production of a large amount at a lower cost, improve the applicability of configuration concrete.
2, by the present invention in that both having improved the basicity of inside concrete with the mode that common cement and corrosion inhibitor cooperate, together
When also improve concrete anticorrosion performance (especially Seawater durability), add basalt fibre on this basis,
Crack-resistant performance of concrete is improved, the fine crack of concrete surface appearance is effectively reduced, pressure pipe surface obtained is substantially without meat
Eye visible crack, this is most important for improving the durability of concrete pressure pipe in the seawater.Through the invention above-mentioned each
The cooperation of raw material can reduce external unfavorable factor in concrete and concrete using preparation method of the invention to greatest extent
The influence of portion's reinforcing bar；It effectively solves now small using high sulfate resisting cement formation of concrete basicity deficiency, concrete surface
Technical problem more than crackle and cavity, and the cost of product is effectively reduced, improve the applicability of configuration concrete.
3, preparation method process of the invention is simple, easy to operate, easy to implement, and the raw material sources of use are wide, economical
It is easy to get, low for equipment requirements, cost of investment is low, practicability and adaptable, the advantages of fully utilizing each composition raw material, mentions
The performance of product is risen, it is easy to accomplish big batch metaplasia truly produces, application easy to spread.
4, the concrete pressure pipe gone out using concrete production of the invention, probability of ensuring strength of concrete are significantly promoted,
Intensity can reach 55MPa or more, can reach 65MPa, and concrete density is high, can effectively prevent harmful ion in seawater
Infiltration is immersed, it can be ensured that concrete pressure pipe design life.
Specific embodiment
Embodiment of the present invention is described in detail below in conjunction with embodiments and examples, but this field skill
Art personnel will be understood that following embodiments and embodiment are merely to illustrate the present invention, and are not construed as limiting model of the invention
It encloses.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
Every other embodiment, shall fall within the protection scope of the present invention.The person that is not specified actual conditions, according to normal conditions or manufacturer builds
The condition of view carries out.
In a first aspect, providing a kind of cracking resistance/corrosion resistant concrete at least one embodiment, which is characterized in that main
It is prepared by the raw material of following parts by weight:
It is 0.5~2 part of cement, 0.04~0.24 part of flyash, 1.6~2.2 parts of fine aggregate, 2.8~3.5 parts of coarse aggregate, profound
0.001~0.006 part of military rock fiber, 0.03~0.1 part of corrosion inhibitor, 0.008~0.05 part of water-reducing agent and 0.1~0.8 part of water.
Above-mentioned cracking resistance/corrosion resistant concrete passes through suitable and suitable cement, flyash, coarse aggregate, fine aggregate, the Black Warrior
The coordinated effect of rock fiber, corrosion inhibitor, water-reducing agent and water, can be improved the corrosion resistance of concrete, and improve mixed
The cracking resistance for coagulating soil, can also reduce the production cost of concrete, improve practicability, the applicability of concrete.
Further, the present invention both improves inside concrete using the mode that common cement and corrosion inhibitor cooperate simultaneously
Basicity, while concrete anticorrosion performance, especially Seawater durability are also improved, reach high sulfate resisting cement and has mixed
At the effect of agent on crack resistance of concrete seawater corrosion；Basalt fibre is added on this basis, is improved crack-resistant performance of concrete, is effectively dropped
The fine crack that low concrete surface occurs, pressure pipe surface obtained are visible by naked eyes crackle substantially, this is for improving coagulation
The durability of soil pressure solenoid in the seawater is most important.
It should be noted that the "/" in the present invention in " cracking resistance/corrosion-resistant " represent be and/or, i.e., the present invention can mention
The cracking resistance of high concrete perhaps can be improved the corrosion resistance of concrete or improve the crack resistance of concrete simultaneously
Energy and corrosion resistance.
In the present invention, in parts by weight, the content of cement is 0.5~2 part, and typical but non-limiting content can be with
It is 0.5 part, 0.6 part, 0.8 part, 0.9 part, 1 part, 1.2 parts, 1.4 parts, 1.5 parts, 1.6 parts, 1.8 parts or 2 parts；The content of flyash
Be 0.04~0.24 part, typical but non-limiting content can for 0.04 part, 0.06 part, 0.08 part, 0.1 part, 0.12 part,
0.14 part, 0.15 part, 0.16 part, 0.18 part, 0.2 part or 0.24 part；The content of fine aggregate is 1.6~2.2 parts, typical but non-limit
The content of property processed can be 1.6 parts, 1.7 parts, 1.8 parts, 1.9 parts, 1.92 parts, 1.93 parts, 1.95 parts, 1.98 parts, 2 parts, 2.1 parts
Or 2.2 parts；The content of coarse aggregate is 2.8~3.5 parts, and typical but non-limiting content can be 2.8 parts, 2.85 parts, 2.9
Part, 3 parts, 3.1 parts, 3.15 parts, 3.16 parts, 3.18 parts, 3.2 parts, 3.3 parts, 3.4 parts or 3.5 parts；The content of basalt fibre is
0.001~0.006 part, typical but non-limiting content can for 0.001 part, 0.002 part, 0.0025 part, 0.003 part,
0.0033 part, 0.0035 part, 0.004 part, 0.0045 part, 0.005 part or 0.006 part；The content of corrosion inhibitor is 0.03~0.1
Part, typical but non-limiting content can be 0.03 part, 0.04 part, 0.05 part, 0.06 part, 0.07 part, 0.08 part, 0.09 part
Or 0.1 part；The content of water-reducing agent is 0.008~0.05 part, and typical but non-limiting content can be 0.008 part, 0.009
Part, 0.01 part, 0.012 part, 0.013 part, 0.014 part, 0.015 part, 0.016 part, 0.02 part, 0.03 part, 0.04 part or 0.05
Part；The content of water is 0.1~0.8 part, and typical but non-limiting content can be 0.1 part, 0.2 part, 0.3 part, 0.4 part, 0.5
Part, 0.6 part, 0.7 part or 0.08 part.When above-mentioned cement, flyash, coarse aggregate, fine aggregate, basalt fibre, corrosion inhibitor, diminishing
When agent and water are formed and matched using said components, synergistic effect more preferably, is more conducive to the performance of the product promoted.
Preferably, the cracking resistance/corrosion resistant concrete is mainly prepared by the raw material of following parts by weight: cement 0.8~
1.2 parts, 0.1~0.16 part of flyash, 1.8~2.0 parts of fine aggregate, 3.0~3.25 parts of coarse aggregate, basalt fibre 0.003~
0.004 part, 0.05~0.07 part of corrosion inhibitor, 0.01~0.02 part of water-reducing agent and 0.3~0.5 part of water.
It is highly preferred that cracking resistance/the corrosion resistant concrete is mainly prepared by the raw material of following parts by weight: 1 part of cement,
0.14 part of flyash, 1.93 parts of fine aggregate, 3.16 parts of coarse aggregate, 0.0033 part of basalt fibre, 0.06 part of corrosion inhibitor, water-reducing agent
0.014 part and 0.4 part of water.
By reasonably adjusting the proportion between each raw material component, the coordinated given full play between each raw material component is made
With improving the performance of product, further enhance the corrosion resistance and cracking resistance of concrete, stability in use, applicability
Deng additionally aiding reduction production cost.
In a preferred embodiment, the cement is ordinary portland cement, preferably P.O42.5 cement.It is general
Logical portland cement is cement commonly used in the art, and source is wide, at low cost, economical and easily available, further, using P.O42.5
Cement has the characteristics that intensity is high, frost resistance is good, wearability is good, drying shrinkage is small, and obtained concrete strength is high, and applicability is stronger.
In a preferred embodiment, the corrosion inhibitor is concrete resistance rust preservative；
Preferably, the corrosion inhibitor include alkamine corrosion inhibitor, nitrites corrosion inhibitor, phosphoric acid salt corrosion inhibitor,
At least one of sodium benzoate class corrosion inhibitor or compound corrosion inhibitor；
The corrosion inhibitor is preferably compound corrosion inhibitor.
It should be understood that concrete commonly used in the art may be applicable to the present invention with resistance rust preservative.Such as it can
Think amino alcohol, nitrite, phosphate, carbonate, fatty acid salt, sodium benzoate, sodium chromate and compound corrosion inhibitor etc..
Present invention preferably employs be compound corrosion inhibitor, i.e., a variety of resistance rust ingredients are used cooperatively, and can play synergistic effect, enhancing
Resistance rust effect.
Further, the corrosion inhibitor in the present invention is preferably using multi-functional corrosion inhibitor 505, i.e. 505 efficient compounds
Concrete anti-rusting preservative, can be by commercially available.
In a preferred embodiment, the basalt fibre is the basalt fibre that is chopped, and preferably length is 10
~14mm, the chopped basalt fibre that diameter is 15~30 μm；Further preferably length is 12mm, and diameter is 15~30 μm
Be chopped basalt fibre.
The addition of basalt fibre can make concrete anticracking index be greatly improved and improve.It is commonly used in the art
Basalt fibre may be applicable to the present invention, it is preferred to use be concrete with the basalt fibre that is chopped, it is further preferably excellent
Choosing is used using concrete and is chopped BCF12-12-101Y5 (GBF101Y5-12).
The length of the chopped basalt fibre is preferably in 10~14mm, and diameter is preferably between 15~30 μm.Herein
Basalt fibre in size range can preferably obtain coordinated effect with other raw materials, enhance the mechanical property of concrete
Energy and endurance quality.
It should be noted that the present invention does not have special limitation for the source of cement, corrosion inhibitor, basalt fibre, adopt
With each raw material well-known to those skilled in the art；Its commercial goods can such as be used.
The concrete mix that the present invention uses adds composite multi-functional corrosion inhibitor by using ordinary portland cement
Mode had both improved the basicity of inside concrete, while also improving concrete anticorrosion performance, added the Black Warrior on this basis
Rock fiber improves crack-resistant performance of concrete, and the fine crack of concrete surface appearance is effectively reduced.In addition, passing through certain procedures
Mixing keep its molding concrete strength and compactness higher, capillary of concrete surface or so is reduced, thus maximum
Limit reduces influence of the external unfavorable factor to concrete and inside concrete reinforcing bar.The present invention has been effectively relieved existing using high
Technical problem more than sulfate-resistant cement formation of concrete basicity deficiency, concrete surface fine crack and cavity, and effectively drop
The low cost of product improves the applicability of configuration concrete.
In a preferred embodiment, the flyash is F class flyash, preferably II grade and/or I grade of F class powder
Coal ash, further preferably I grade of F class flyash.
Flyash be coal-burning power plant discharge primary solids waste, main component be silica, aluminium oxide, iron oxide,
The oxides such as calcium oxide.The addition of flyash can substitute cement, reduce cement consumption, the workability for improving concrete, reduce
The heat of hydration, enhancing later strength, the internal structure for improving concrete, improve impervious and resistance to corrosion etc..Concrete incorporation mill
The hydration rate of energy delay gelatinizing, extends the setting time of concrete, this property is to high temperature after mineral fine (flyash)
The conveying and construction of season concrete are extremely advantageous.Present invention preferably employs be I grade of F class flyash, the flyash of the type
With heat of hydration when concrete mixing can be effectively reduced, adjusts concrete coagulating time, improves the features such as product appearance quality, it can
So that easily operated when concreting, pipeline finished product beauty, is more advantageous to control of product quality.
In a preferred embodiment, the water-reducing agent includes poly carboxylic acid series water reducer, naphthalene water reducer or wooden
At least one of sulfonate water reducer, the water-reducing agent are preferably poly carboxylic acid series water reducer.
It is understood that the present invention is not particularly limited the concrete type of water-reducing agent, commonly used in the art subtracts
Aqua is suitable for the present invention.Present invention preferably employs be that source is wide, at low cost, the better polycarboxylic-acid diminishing of application effect
Agent.
In a preferred embodiment, the coarse aggregate is stone；
And/or the fine aggregate is sand；
Preferably, green stone and/or rubble that the stone is 5~25mm of partial size；Further, the green stone and/or
Rubble is using continuous grading construction green stone and/or rubble；It meets in national standard GB/T14685-2011 to continuous size fraction
Regulation.
Preferably, the sand is construction natural river sand, fineness modulus 2.3~3.2；Using within the scope of the fineness modulus
Natural river sand can give full play to the effect of additive, and the concrete workability made is good, and convenient construction, concrete is not easy
Cracking facilitates the mechanical property and endurance quality that enhance concrete.
Tap water can be used in water in the present invention.In concrete, the weight ratio of water and cement can be described as the ratio of mud, the ratio of mud
Compactness etc. after capable of influencing the rheological property, cement slurry coherent structure, hardening of concrete.In the situation that composition material gives
Under, the ratio of mud is also more important mechanical property parameters, thus needs to control the suitable ratio of mud, so that concrete is with good
Good workability, mechanical property etc..
Second aspect provides a kind of preparation of cracking resistance/corrosion resistant concrete as described above at least one embodiment
Method, comprising the following steps:
Each raw material, mixing and discharging are weighed by formula ratio.
This method process flow is simple, easy to operate, easy to implement, low for equipment requirements, and cost of investment is low, production obtained
Product are had excellent performance, application easy to spread.
In a preferred embodiment, the addition sequence of raw material be followed successively by coarse aggregate, cement, flyash, fine aggregate,
Corrosion inhibitor, basalt fibre, water-reducing agent and water；Using specific charging sequence, the advantage of each raw material can be given full play to, is improved
Intensity, the compactness of concrete reduce influence of the external unfavorable factor to concrete and inside concrete reinforcing bar to greatest extent, have
Mechanical property and endurance quality of effect enhancing concrete etc..
Preferably, it the described method comprises the following steps:
According to formula ratio, successively coarse aggregate, cement, flyash, fine aggregate, corrosion inhibitor, basalt fibre are added to mixed
In solidifying soil blender, 30~60s is mixed, then water-reducing agent and water are added in concrete mixer under stiring, then
160~240s is mixed to get the concrete；
It is highly preferred that the described method comprises the following steps:
A) the every tray concrete output set according to concrete mixing plant calculates various originals according to weight ratio (parts by weight)
The usage amount of material, mixing plant automatic gauge coarse aggregate, fine aggregate, cement, flyash, water-reducing agent and water manually use electronics
Scale weighs corrosion inhibitor and basalt fibre；
B) by the raw material measured according to coarse aggregate, cement, flyash, fine aggregate, corrosion inhibitor, basalt fibre it is successive
Sequence is added sequentially in concrete mixer, opens blender and 30~40s is mixed, by diminishing in non-stop-machine situation
Agent and water are added in concrete mixer, remix 160~240s of stirring, preferably remix stirring 180s；
C) that configured corrosion-resistant, high cracking resistance energy concrete is imported concrete charging bucket is stand-by.
In addition, summer and winter should take Insulation, the drop temperature of the concrete is controlled at 10~35 DEG C.
It is understood that in the preparation method of concrete of the invention, used equipment include concrete mixing plant,
Electronic scale, concrete charging bucket, pipe mould, steam-cured facility (when using steam curing), thermometer, are the routine of this field
Equipment, setting is simple, easily operated, reduces cost of investment, high production efficiency is with a wide range of applications.
Preparation method of the invention ensure that being precisely controlled of concrete parameters, Effective Regulation and uniformity, reduce mixed
The site operation difficulty for coagulating soil, ensure that the performance of concrete.
The slump is to measure an important indicator of concrete slurry workability, which reflects whether concrete is easy to
Constructing operation and uniformly densely performance are specifically ensuring that being normally carried out for construction.In the present invention, the concrete
The slump is controlled in 70~130mm.
The third aspect provides a kind of above-mentioned cracking resistance/corrosion resistant concrete or above-mentioned system at least one embodiment
Cracking resistance/corrosion resistant concrete made from Preparation Method is preparing the application in concrete pressure pipe；
Preferably, the concrete pressure pipe is for conveying seawater.
It is understood that concrete pressure pipe of the invention mainly can be applicable in conveying seawater, there is excellent power
Performance and durability are learned, Seawater durability is excellent, and but it is not limited to this, can be equally used for delivering rainwater, surface water
Deng other media, long service life, good economy performance is had excellent performance.
Fourth aspect provides a kind of concrete pressure pipe at least one embodiment, mainly by above-mentioned cracking resistance/corrosion resistant
Cracking resistance/corrosion resistant concrete made from concrete or above-mentioned preparation method is lost to be made.
5th aspect, provides a kind of preparation method of concrete pressure pipe as described above at least one embodiment,
The following steps are included:
Cracking resistance/corrosion resistant concrete is poured and builds up concrete duct, then concrete duct is conserved；Maintenance terminates
After demoulded.
Preferably, the time poured is≤30min, preferably 10~28min.
In a preferred embodiment, the maintenance includes natural curing and/or steam curing.
Preferably, it during natural curing, when the intensity of concrete is 3~5MPa, sprinkles water, keeps moistening at least
24 hours；
Natural curing can be used in the concrete duct of above-mentioned concrete formation, can also use steam curing.Natural curing
When, when concrete has an early strength i.e. intensity reaches 3~5MPa, to sprinkle water, keep at least 24 hours wet.
Preferably, steam curing includes that successively carry out quiet stops stage, temperature rise period, constant temperature stage and temperature-fall period；
Preferably, it is quiet stop the stage include: concreting completion after, it is quiet to stop 1~2 hour；
Preferably, the temperature rise period include: it is quiet stop the stage after, be warming up to 50~60 DEG C, be preferably warming up to 55 DEG C, control
Heating rate is no more than 22 DEG C/h；
Preferably, it is 50~60 DEG C (55 ± 5 DEG C) that the constant temperature stage, which includes: thermostat temperature, and constant temperature time is 3~5 hours；
Preferably, it is 1~2 hour that temperature-fall period, which includes: temperature fall time, and control cooling rate is no more than 30 DEG C/h.
Above-mentioned curing procedure can be such that concrete is sufficiently conserved, and make intensity, crack resistance, permeability resistance, corrosion resistance etc.
It increases, can reduce in the prior art the microdefect caused by conserving.
Corrosion-resistant made of above-mentioned preparation method mixing, high cracking resistance energy concrete, and the coagulation soil pressure of production
Solenoid fully utilizes its each the advantages of forming raw material, and ordinary portland cement adds corrosion inhibitor to mix concrete and reached height
Sulfate-resistant cement mixes the effect of agent on crack resistance of concrete seawater corrosion, and avoids and generate basicity not using high sulfate resisting cement
The disadvantage of foot, also substantially reduces the purchase cost of cement；It is also fully utilized by the characteristic of this inorganic material of basalt fibre, is made
At concrete anticracking index be greatly improved and improve, concrete pressure pipe surface is visible by naked eyes crackle substantially, this is right
It is most important to improve the durability of concrete pressure pipe in the seawater.
Go out concrete pressure pipe using concrete production of the present invention, probability of ensuring strength of concrete is significantly promoted, and intensity can
Reach 55MPa or more, reach as high as 65MPa, concrete density is high, can effectively prevent the infiltration of harmful ion in seawater from invading
Enter, to guarantee the design life of concrete pressure pipe.
Combined with specific embodiments below, comparative example, the invention will be further described.
Embodiment 1
A kind of cracking resistance/corrosion resistant concrete, is mainly prepared by the raw material of following parts by weight:
1 part of cement, 0.14 part of flyash, 1.93 parts of fine aggregate, 3.16 parts of coarse aggregate, 0.0033 part of basalt fibre, resistance
0.06 part of agent of rust, 0.014 part of water-reducing agent and 0.4 part of water.
Wherein, cement is P.O42.5 cement；
Flyash is I grade of F class flyash；
Rubble is used in the continuous grading construction that coarse aggregate is 5~25mm of partial size；
Fine aggregate is natural river sand, fineness modulus 2.5；
Basalt fibre is the concrete GBF101Y5-12 that is chopped；
Corrosion inhibitor is multi-functional corrosion inhibitor 505；
Water-reducing agent is high-efficiency water-reducing agent of poly-carboxylic acid.
Cracking resistance/corrosion resistant concrete preparation method, comprising the following steps:
A) the every tray concrete output set according to concrete mixing plant calculates various originals according to weight ratio (parts by weight)
The usage amount of material, mixing plant automatic gauge coarse aggregate, fine aggregate, cement, flyash, water-reducing agent and water manually use electronics
Scale weighs corrosion inhibitor and basalt fibre；
B) by the raw material measured according to coarse aggregate, cement, flyash, fine aggregate, corrosion inhibitor, basalt fibre it is successive
Sequence is added sequentially in concrete mixer, opens blender and 30~40s is mixed, by diminishing in non-stop-machine situation
Agent and water are added in concrete mixer, remix stirring 180s；
C) that configured corrosion-resistant, high cracking resistance energy concrete is imported concrete charging bucket is stand-by.
Embodiment 2
A kind of cracking resistance/corrosion resistant concrete, is mainly prepared by the raw material of following parts by weight:
0.9 part of cement, 0.1 part of flyash, 1.83 parts of fine aggregate, 3.06 parts of coarse aggregate, 0.003 part of basalt fibre, resistance
0.05 part of agent of rust, 0.01 part of water-reducing agent and 0.3 part of water.
Remaining is same as Example 1.
Embodiment 3
A kind of cracking resistance/corrosion resistant concrete, is mainly prepared by the raw material of following parts by weight:
1.2 parts of cement, 0.16 part of flyash, 2.03 parts of fine aggregate, 3.25 parts of coarse aggregate, 0.004 part of basalt fibre, resistance
0.07 part of agent of rust, 0.02 part of water-reducing agent and 0.5 part of water.
Remaining is same as Example 1.
Embodiment 4
A kind of cracking resistance/corrosion resistant concrete, is mainly prepared by the raw material of following parts by weight:
1.5 parts of cement, 0.2 part of flyash, 2.2 parts of fine aggregate, 3.5 parts of coarse aggregate, 0.0055 part of basalt fibre, resistance rust
0.08 part of agent, 0.045 part of water-reducing agent and 0.7 part of water.
In this implementation, flyash is II grade of F class flyash；
Coarse aggregate is 5~16mm of partial size continuous grading green stone；Fine aggregate natural river sand, fineness modulus 3.2；
Basalt fibre is that length is 12mm, the chopped basalt fibre that diameter is 20 μm；Corrosion inhibitor is compound resistance rust
Agent；
Remaining is same as Example 1.
Embodiment 5
A kind of cracking resistance/corrosion resistant concrete, is mainly prepared by the raw material of following parts by weight:
0.9 part of cement, 0.13 part of flyash, 1.65 parts of fine aggregate, 2.86 parts of coarse aggregate, 0.0015 part of basalt fibre,
0.03 part of corrosion inhibitor, 0.05 part of water-reducing agent and 0.24 part of water.
In this implementation, coarse aggregate is 5~16mm of partial size continuous grading green stone；Fine aggregate natural river sand, fineness modulus
2.3；
Basalt fibre is that length is 12mm, the chopped basalt fibre that diameter is 30 μm；
Corrosion inhibitor is compound corrosion inhibitor；
Remaining is same as Example 1.
Comparative example 1
A kind of cracking resistance/corrosion resistant concrete, is mainly prepared by the raw material of following parts by weight:
3 parts of cement, 0.5 part of flyash, 2.5 parts of fine aggregate, 4 parts of coarse aggregate, 0.008 part of basalt fibre, corrosion inhibitor 0.2
Part, 0.1 part of water-reducing agent and 1.5 parts of water.
Unlike the first embodiment, in this comparative example the content of each raw material not in content range provided by the present invention
It is interior.
Comparative example 2
A kind of cracking resistance/corrosion resistant concrete, is mainly prepared by the raw material of following parts by weight:
2.5 parts of cement, 0.2 part of flyash, 2.13 parts of fine aggregate, 3.36 parts of coarse aggregate, 0.0055 part of basalt fibre, resistance
0.01 part of agent of rust, 0.034 part of water-reducing agent and 0.8 part of water.
Unlike the first embodiment, the content of cement and corrosion inhibitor does not contain provided by the present invention in this comparative example
It measures in range.
Comparative example 3
A kind of cracking resistance/corrosion resistant concrete, is mainly prepared by the raw material of following parts by weight:
1 part of cement, 1.93 parts of fine aggregate, 3.16 parts of coarse aggregate, 0.0033 part of basalt fibre, subtracts 0.14 part of flyash
0.014 part and 0.4 part of water of aqua.
Unlike the first embodiment, raw material corrosion inhibitor is omitted in this comparative example.
Comparative example 4
A kind of cracking resistance/corrosion resistant concrete, is mainly prepared by the raw material of following parts by weight:
1 part of cement, 0.14 part of flyash, 1.93 parts of fine aggregate, 3.16 parts of coarse aggregate, 0.06 part of corrosion inhibitor, water-reducing agent
0.014 part and 0.4 part of water.
Unlike the first embodiment, raw material basalt fibre is omitted in this comparative example.
Comparative example 5
A kind of cracking resistance/corrosion resistant concrete, unlike the first embodiment, in the preparation method of the concrete:
The addition sequence of raw material is followed successively by cement, flyash, fine aggregate, coarse aggregate, corrosion inhibitor, basalt fibre, diminishing
Agent and water.
A) the every tray concrete output set according to concrete mixing plant calculates various originals according to weight ratio (parts by weight)
The usage amount of material, mixing plant automatic gauge coarse aggregate, fine aggregate, cement, flyash, water-reducing agent and water manually use electronics
Scale weighs corrosion inhibitor and basalt fibre；
B) raw material measured addition stirring sequence is as follows:
Cement, flyash, fine aggregate, coarse aggregate, corrosion inhibitor, basalt fibre are sequentially added in sequence, are mixed
Time is same as Example 1；
C) that configured corrosion-resistant, high cracking resistance energy concrete is imported concrete charging bucket is stand-by.
In this comparative example, the charging sequence of raw material is not in range provided by the present invention in the preparation method of concrete.
Application examples
Concrete pressure pipe is made in the concrete of above-described embodiment respectively, is mainly comprised the steps that
1) cracking resistance/corrosion resistant concrete is poured and builds up concrete duct, pour the time within 30min.
2) concrete duct is conserved；The maintenance includes natural curing and/or steam curing；
Wherein, it when natural curing, when concrete has an early strength i.e. intensity reaches 3~5MPa, to sprinkle water, protect
It holds at least 24 hours wet.
Steam curing then needs to carry out steam curing in accordance with following procedure:
It is quiet to stop the stage: quiet to stop 1~2 hour after concreting completion；
Temperature rise period: it is quiet stop the stage after, be warming up to 55 DEG C, control heating rate is no more than 22 DEG C/h；
The constant temperature stage: for thermostat temperature at 55 ± 5 DEG C, constant temperature time is 3~5 hours；
Temperature-fall period: temperature fall time is 1~2 hour, and control cooling rate is no more than 30 DEG C/h.
3) it is demoulded after conserving.
Performance test
Concrete made from above-described embodiment and comparative example is tested for the property, test result is as shown in table 1.(according to
GB/50164-2011, GB/T50082-2009 are tested for the property concrete)
The testing concrete performance result of 1 embodiment and comparative example of table
The compression strength of concrete of the invention is high it can be seen from the above performance test, (takes for a long time by engineer application
Sample) composite soil minimum intensity be not less than 55MPa；Anti-permeability performance testing result be it is waterproof, seepage-resistant grade be >=P12, have
Good anti-permeability performance；With very high resistance of chloride ion penetration；Resisting erosion of sulfate inspection is carried out with 5% metabisulfite solution
It surveys, resisting erosion of sulfate grade reaches KS150；And the initial slump degree of the embodiment of the present invention is big, the workability of concrete is preferable, favorably
It constructs in the long-distance transportation of concrete and summer high temperature.The present invention meets the needs of concrete works, and preparation method is simple,
High production efficiency.And the concrete or proportion of comparative example are unreasonable, or one or more raw material components are omitted, and make
Corrosion resistance, the cracking resistance of the concrete come are poor, are not able to satisfy the required concrete technology requirement in coastal area.
In addition, according to method as defined in GB/T15345-2017 to concrete pressure pipe pipe made of concrete of the present invention
Road is tested: 1) carrying out anti-internal water pressure test to pipeline；2) the anti-external load test of pipeline；3) pipe joint corner is tested；
Test result shows the design requirement complied fully with.
It should be understood that the content that description in the present invention is not described in detail belongs to professional and technical personnel in the field's public affairs
The prior art known.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. a kind of cracking resistance/corrosion resistant concrete, which is characterized in that be mainly prepared by the raw material of following parts by weight:
0.5~2 part of cement, 0.04~0.24 part of flyash, 1.6~2.2 parts of fine aggregate, 2.8~3.5 parts of coarse aggregate, basalt
0.001~0.006 part of fiber, 0.03~0.1 part of corrosion inhibitor, 0.008~0.05 part of water-reducing agent and 0.1~0.8 part of water.
2. cracking resistance/corrosion resistant concrete according to claim 1, which is characterized in that mainly by the raw material of following parts by weight
It is prepared:
0.8~1.2 part of cement, 0.1~0.16 part of flyash, 1.8~2.0 parts of fine aggregate, 3.0~3.25 parts of coarse aggregate, the Black Warrior
0.003~0.004 part of rock fiber, 0.05~0.07 part of corrosion inhibitor, 0.01~0.02 part of water-reducing agent and 0.3~0.5 part of water；
Preferably, it is mainly prepared by the raw material of following parts by weight:
1 part of cement, 0.14 part of flyash, 1.93 parts of fine aggregate, 3.16 parts of coarse aggregate, 0.0033 part of basalt fibre, corrosion inhibitor
0.06 part, 0.014 part of water-reducing agent and 0.4 part of water.
3. cracking resistance/corrosion resistant concrete according to claim 1, which is characterized in that the cement is normal silicate water
Mud, preferably P.O42.5 cement；
Preferably, the flyash is F class flyash, preferably II grade and/or I grade of F class flyash, further preferably I grade of F
Class flyash；
Preferably, the basalt fibre is the basalt fibre that is chopped, and preferably length is 10~14mm, diameter is 15~30 μm
Chopped basalt fibre, further preferably length is 12mm, and diameter is 15~30 μm of chopped basalt fibre；
Preferably, the corrosion inhibitor is concrete resistance rust preservative；
Preferably, the corrosion inhibitor includes alkamine corrosion inhibitor, nitrites corrosion inhibitor, phosphoric acid salt corrosion inhibitor, benzene first
At least one of sour sodium class corrosion inhibitor or compound corrosion inhibitor；
Preferably, the water-reducing agent include in poly carboxylic acid series water reducer, naphthalene water reducer or ligninsulfonate water-reducing agent at least
One kind, the water-reducing agent are preferably poly carboxylic acid series water reducer.
4. described in any item cracking resistance/corrosion resistant concretes according to claim 1~3, which is characterized in that the coarse aggregate is stone
Son；
And/or the fine aggregate is sand；
Preferably, green stone and/or rubble that the stone is 5~25mm of partial size；
Preferably, the sand is natural river sand, fineness modulus 2.3~3.2.
5. as the described in any item cracking resistance/corrosion resistant concretes of Claims 1 to 4 preparation method, which is characterized in that including with
Lower step:
Each raw material, mixing and discharging are weighed by formula ratio.
6. the preparation method of cracking resistance/corrosion resistant concrete according to claim 5, which is characterized in that the addition of raw material is suitable
Sequence is followed successively by coarse aggregate, cement, flyash, fine aggregate, corrosion inhibitor, basalt fibre, water-reducing agent and water；
Preferably, it the described method comprises the following steps:
According to formula ratio, coarse aggregate, cement, flyash, fine aggregate, corrosion inhibitor, basalt fibre are successively added to concrete
In blender, 30~60s is mixed, then water-reducing agent and water are added in concrete mixer under stiring, remixed
160~240s is stirred to get the concrete；
Preferably, the drop temperature of the concrete is 10~35 DEG C.
7. the described in any item cracking resistance/corrosion resistant concretes of Claims 1 to 4 or the described in any item preparations of claim 5~6
Cracking resistance/corrosion resistant concrete made from method is preparing the application in concrete pressure pipe；
Preferably, the concrete pressure pipe is for conveying seawater.
8. a kind of concrete pressure pipe, which is characterized in that mainly mixed by described in any item cracking resistances of Claims 1 to 4/corrosion-resistant
Cracking resistance/corrosion resistant concrete made from solidifying soil or the described in any item preparation methods of claim 5~6 is made.
9. the preparation method of concrete pressure pipe as claimed in claim 8, which comprises the following steps:
Cracking resistance/corrosion resistant concrete is poured and builds up concrete duct, then concrete duct is conserved；Maintenance terminates laggard
Row demoulding；
Preferably, the time poured is≤30min, preferably 10~28min.
10. the preparation method of concrete pressure pipe according to claim 9, which is characterized in that the maintenance includes nature
Maintenance and/or steam curing；
Preferably, it during natural curing, when the intensity of concrete is 3~5MPa, sprinkles water, holding wet at least 24 is small
When；
Preferably, steam curing includes that successively carry out quiet stops stage, temperature rise period, constant temperature stage and temperature-fall period；
Preferably, it is quiet stop the stage include: concreting completion after, it is quiet to stop 1~2 hour；
Preferably, the temperature rise period include: it is quiet stop the stage after, be warming up to 50~60 DEG C, control heating rate be no more than 22 DEG C/
Hour；
Preferably, it is 50~60 DEG C that the constant temperature stage, which includes: thermostat temperature, and constant temperature time is 3~5 hours；
Preferably, it is 1~2 hour that temperature-fall period, which includes: temperature fall time, and control cooling rate is no more than 30 DEG C/h.
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| CN109734472A (en) * | 2019-03-01 | 2019-05-10 | 南京工程学院 | A kind of basalt fibre slag concrete small-sized hollow building block and preparation method thereof |
| CN110963770A (en) * | 2019-12-02 | 2020-04-07 | 山东龙泉管道工程股份有限公司 | Corrosion-resistant reinforced concrete drain pipe and manufacturing method thereof |
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| CN111978036A (en) * | 2020-08-17 | 2020-11-24 | 北部湾海洋新材料研究院 | C50-grade marine high-performance concrete |
| CN113968710A (en) * | 2021-11-01 | 2022-01-25 | 青岛青建新型材料集团有限公司 | Anti-corrosion marine concrete with self-repairing function and preparation method and application thereof |
| CN114409339A (en) * | 2022-02-10 | 2022-04-29 | 广州盛门新材料科技有限公司 | High-strength anti-cracking concrete and preparation method thereof |
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| CN117466599A (en) * | 2023-11-01 | 2024-01-30 | 宿迁华美新材料有限公司 | Corrosion-resistant precast concrete square pile |
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