CN109095809A - A kind of expansion anti-crack water-proof agent and its application method - Google Patents
A kind of expansion anti-crack water-proof agent and its application method Download PDFInfo
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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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C12/00—Powdered glass; Bead compositions
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C13/00—Fibre or filament compositions
- C03C13/06—Mineral fibres, e.g. slag wool, mineral wool, rock wool
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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
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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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/60—Agents for protection against chemical, physical or biological attack
- C04B2103/65—Water proofers or repellants
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00293—Materials impermeable to liquids
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- 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
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
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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
- 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
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- General Chemical & Material Sciences (AREA)
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Abstract
The present invention discloses a kind of expansion anti-crack water-proof agent, the raw material comprising following mass percent: cracking resistance swelling agent 5-30%, microballon 20-40%, gangue 25-45%, treated basalt fiber 0.1-8%, additive 1-5%.The present invention can play superposition compensation contraction by cracking resistance swelling agent and treated basalt fiber in concrete, have the function of dual cracking resistance and waterproof；It is allowed to preferably be combined with concrete by treated basalt fiber, the structure for increasing concrete on the basis of not influencing concrete construction performance is closely knit.
Description
Technical field
The invention belongs to expand anti-cracking waterproof the field of building materials, and in particular to a kind of expansion anti-crack water-proof agent and its use
Method.
Background technique
Increasing with construction project, Shrinkage Cracking of Concrete problem becomes increasingly conspicuous, and has seriously affected mixed
Coagulate durability, bearing capacity and the waterproof performance of soil., mainly there are three aspects in the reason of Concrete Structure Crack: first is that external
What load caused, such crack presence is the most universal, and predominantly unreasonable structural design, safety coefficient are inadequate, do not consider to construct
A possibility that, the problems such as rigidity of structure is insufficient；Second is that structure secondary stress caused, reality of such crack due to concrete structure
There is any discrepancy or does not consider comprehensively for working condition and conventionally calculation, and then causes secondary stress to lead to structure crack at certain positions；Three
It is that distortional stress causes, the mainly malformation due to caused by the factors such as temperature, contraction, steel bar corrosion, differential settlement,
Stress is generated when deformation suffers restraints, and just generates crack when this stress is more than concrete tensile strength.To alleviate coagulation
Native problem of Cracking, related personnel have conducted extensive research.
Chinese CN104355561A patent is related to a kind of environmental type low-dosage anti-crack water-proof agent for concrete and its system
Preparation Method.The invention provides a kind of anti-crack water-proof agent for concrete, including (by mass): calcium sulphoaluminate class cracking resistance clinker:
5.0%-25.0%, wood fibre: 0.1%-1.0%, calcium gluconate: 0.1%-1.0%, flyash: 20.0%-
45.0%, gangue: 20.0%-45.0%, anhydrite: 30.0%-60.0%, the sum of above-mentioned mass percent are 100%.It should
Invention additionally provides a kind of method for preparing anti-crack water-proof agent for concrete, including by calcium sulphoaluminate class cracking resistance clinker, flyash, coal
Spoil, anhydrite after mix grinding to predetermined fineness, are made after mixing evenly with wood fibre, calcium gluconate.The invention is using wood
Matter fiber increases the compactness of concrete, is affected to the slump-loss of concrete, setting time.
Chinese CN106116201A patent discloses a kind of masonry concrete anticracking adulterating agent, by following raw material
Composition: 40-50 parts of CSA swelling agent clinker, 10-20 parts of flyash, 4-8 parts of anhydrous sodium sulfate, 8-15 parts of aluminum sulfate, basalt are fine
Tie up 0.1-0.5 parts, 0.5-2 parts of polypropylene fibre, 4-6 parts of organic waterproof agent.The masonry concrete anticracking adulterating agent of the invention has
There are cracking resistance, impervious, waterproof, greatly prolongs the service life of building.The patent is increased mixed using parabasalt fiber
The compactness for coagulating soil, can play the role of certain crack resistence, but be affected by volume, use condition.
To avoid concrete cracking, the prior art mainly uses optimised coagulation soil mix-design, increases the ratio of reinforcement, reduces
Hydration heat of concrete, addition the methods of fiber and swelling agent.Currently, most engineering applications swelling agent or fiber are to improve mixed
The compactness for coagulating soil, plays compensation contraction, prevents the cracking of concrete, but traditional swelling agent or fiber by volume, make
It is affected with condition, dispersion performance and curing condition etc., is also easy to produce that concrete slump loss is big, setting time contracting
The problems such as short, strength reduction, poor dispersion.Therefore, it is badly in need of designing a kind of expansion anti-crack water-proof agent and its application method to solve
The certainly above problem.
Summary of the invention
In response to the problems existing in the prior art, the purpose of the present invention is to provide a kind of expansion anti-crack water-proof agent and its users
Method can play superposition compensation contraction by cracking resistance swelling agent and treated basalt fiber in concrete, have dual
The function of cracking resistance and waterproof；It is allowed to preferably be combined with concrete by treated basalt fiber, is not influencing concrete construction
The structure for increasing concrete on the basis of performance is closely knit.
To achieve the above object, the technical solution adopted by the present invention is that:
The present invention provides a kind of expansion anti-crack water-proof agent, the raw material comprising following mass percent: cracking resistance swelling agent 5-
30%, microballon 20-40%, gangue 25-45%, treated basalt fiber 0.1-8%, additive 1-5%, above-mentioned quality percentage
Than the sum of be 100%.
The present invention can be played superposition compensation in concrete and be shunk using cracking resistance swelling agent and treated basalt fiber to be made
With, have the function of dual cracking resistance and waterproof, it can be a large amount of with hydrolysis product of cement generation in the cracking resistance swelling agent addition cement
Mineral microdilatancy crystal has and blocks and cut off capillary channel, reduces concrete water penetration under hydrostatic pressure, makes concrete
Bleeding further decreases, and improves concrete density, improves the function of the cracking resistance of concrete；In addition, cracking resistance swelling agent
It mixes in concrete, a kind of special hydrophobic coating layer can be formed, can play the role of reducing the water translocation under pressure, effectively
The etch ability and endurance quality for improving the resistance to harmful substance of concrete reach concrete and realize impermeable structure and anti-crack and anti-seepage
Purpose, to improve the effect of the durability of concrete；The treated basalt fiber surface has functional group abundant, can
Overcome the problems, such as that traditional fibre is affected by volume, use condition, dispersion performance and curing condition etc., is not influencing to mix
Increase the density of concrete structure on the basis of solidifying soil workability.
Microballon of the present invention is a kind of global shape, continuous ionic exchange, ultra-fine, solid, superfined flyash alumino-silicate
Fine microballon, though solid in the flyash and hollow bead for being sunken to water.
Preferably, when the mass ratio of the cracking resistance swelling agent and treated basalt fiber is 10:1, the crack resistance of concrete
It can be optimal.
The cracking resistance swelling agent the preparation method is as follows: by swelling agent, epoxy resin and amino resins (85- in mass ratio
95): (10-5): after (5-1) mixing, being dissolved in ethanol solution, stir evenly, and vacuum drying removal dehydrated alcohol obtains
To solid mixture, cracking resistance swelling agent is made through grinding.
Cracking resistance swelling agent is modified by using the epoxy resin and amino resins of special ratios, wherein amino resins
It can make to generate chemical bond between the epoxy molecule of line style, be connected with each other linear molecule, form reticular structure, it is attached
On cracking resistance swelling agent surface, effectively adjust the heat evolution velocity of cracking resistance swelling agent, can not only guarantee that early period has expansion rate,
It can also play the role of being obviously improved to endurance performance of concrete in later period slow release swelling agent.
The swelling agent is one or more of calcium oxide expansion agents, calcium sulphoaluminate class swelling agent.
The surface area of the cracking resistance swelling agent is 800m2/kg。
The microballon includes the following components'mass percentage: CaO:11.3-15.6%, SiO2: 46.7-58.5%,
Fe2O3: 4.2-5.9%, Al2O3: 16.5-22.9%, MgO:2.7-3.8%, SO3: 0.1-0.4%, loss on ignition: 2.2-6.5%.
The gangue includes the following components'mass percentage: Al2O3: 18.3%-26.1%, Fe2O3: 2.5%-
8.5%.
Incorporation microballon and gangue can largely improve the workability of concrete, make up since expansion component causes
Negative effect.
The treated basalt fiber the preparation method is as follows: first by the concentrated sulfuric acid and sodium nitrate (60-80) in mass ratio:
After 1 mixing, it is placed in cooling in ice bath, basalt fibre is mixed when mixed solution is lower than 5 DEG C, after mixing evenly, under room temperature
10-50g potassium permanganate is added, temperature is increased to 40-60 DEG C, and insulation reaction 4-6h pours into products therefrom in ice water, side stirring
Suitable hydrogen peroxide is added in side, becomes yellow to solution colour, then filters, and carries out centrifuge washing to product with dilute hydrochloric acid,
Until pH value is close to 7, place the product in ultrasonic disperse in water, vacuum drying obtains treated basalt fiber.
Basalt fibre is directly drawn by natural volcanic rock, and autologous density, ingredient bulk density are suitable with cement,
With there is good dispersibility when concrete mixing, binding force is strong, meanwhile, it is modified that surface carried out to basalt fibre, makes its table
Face increases active function groups, is attached to the growth of its surface hydration to concrete and provides place, can refine crystal structure, make to mix
Xtah Crude Clay structure is more closely knit.
The volume fraction of the dilute hydrochloric acid is 10%.
The additive is one or more of sodium sulphate, aluminum aluminum sulfate, calcium nitrate, calcium formate and lithium nitrate.Incorporation
Additive can regulate and control the hydration reaction ability of cracking resistance swelling agent, microballon and gangue, accelerate early reaction rate.
The present invention also provides the application method of the expansion anti-crack water-proof agent, the expansion anti-crack water-proof agent accounts for concrete glue
The 6-10% of gel material total amount.
Compared with prior art, the beneficial effects of the present invention are:
(1) present invention is played superposition compensation in concrete and is shunk and made using cracking resistance swelling agent and treated basalt fiber
With, have the function of dual cracking resistance and waterproof, can be with micro-crack caused by each age difference reason of compensating concrete, prevention and suppression
The generation and development in crack processed；
(2) by the present invention in that being modified with the epoxy resin of special ratios and amino resins to cracking resistance swelling agent,
Middle amino resins can make to generate chemical bond between the epoxy molecule of line style, be connected with each other linear molecule, be formed
Reticular structure is attached to cracking resistance swelling agent surface, effectively adjusts the heat evolution velocity of cracking resistance swelling agent, can not only guarantee early period
With expansion rate, can also play the role of being obviously improved to endurance performance of concrete in later period slow release swelling agent；
(3) present invention incorporation microballon powder and gangue can largely improve the workability of concrete, make up due to
Negative effect caused by expansion component；
(4) present invention is modified to basalt fibre progress surface, so that its surface is increased active function groups, to coagulation native attached
Its surface hydration grow provide place, crystal structure can be refined, keep concrete structure more closely knit；
(5) additive of the present invention can regulate and control the hydration reaction ability of cracking resistance swelling agent, microballon and gangue, accelerate early stage
Reaction rate influences the cracking resistance swelling agent and treated basalt fiber by volume, use condition, dispersion performance etc.
It is smaller；
(6) product of the present invention has the advantages that environmentally protective, improvement concrete workability, corrosion-resistant, high temperature resistant etc. are a variety of, extensively
It is general big suitable for underground anti-cracking waterproof engineering, super-long structural engineering, civil air defense constructions and installations, express highway pavement, tunnel, harbour and reservoir
The construction of the Structural Engineerings such as dam and concrete maintenance, there is the tensile strength of concrete, toughness, anti-permeability performance, cracking resistance
Apparent improvement result substantially improves anti-cracking impervious performance, shock resistance and the shock resistance of concrete.
Specific embodiment
Technical solution of the present invention will be clearly and completely described below, it is clear that described embodiment is only
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
All other embodiment obtained, shall fall within the protection scope of the present invention under the conditions of not making creative work.
The application provides a kind of expansion anti-crack water-proof agent, the raw material comprising following mass percent: cracking resistance swelling agent 5-
30%, microballon 20-40%, gangue 25-45%, treated basalt fiber 0.1-8%, additive 1-5%, above-mentioned quality percentage
Than the sum of be 100%.The expansion anti-crack water-proof agent that above-mentioned each raw material is prepared within the scope of the application has preferable
Cracking resistance and water-proof function, when the content of each raw material exceed above range when on the one hand will appear incorporation concrete in use,
The effect of anti-cracking waterproof is not had by being affected for volume, use condition, curing condition etc.；On the other hand it easily causes mixed
The problem of coagulating big soil slump-loss, setting time shortening, strength reduction, poor dispersion etc..
Embodiment 1
The present embodiment provides a kind of expansion anti-crack water-proof agent, the raw material comprising following mass percent: cracking resistance swelling agent
30%, microballon 30%, gangue 35%, treated basalt fiber 3%, additive 2%；
When the mass ratio of cracking resistance swelling agent and treated basalt fiber is 10:1, the anti-cracking waterproof performance of concrete is most
It is excellent.
The cracking resistance swelling agent the preparation method is as follows: by swelling agent, epoxy resin and amino resins 95:4 in mass ratio:
It after 1 mixing, is dissolved in ethanol solution, stirs evenly 10min, be placed in 60 DEG C of vacuum oven vacuum drying removal nothing
Water-ethanol obtains solid mixture, and cracking resistance swelling agent is made through grinding；
The swelling agent forms for the calcium oxide expansion agents and calcium sulphoaluminate class swelling agent for being 9:1 by mass ratio, at this
Swelling agent can be commercially available by inventing calcium oxide expansion agents or calcium sulphoaluminate class swelling agent in the expansion anti-crack water-proof agent；
The cracking resistance swelling agent being prepared includes: CaO:57.5%~62.8%, SiO by mass2: 7.7%~
9.5%, Fe2O3: 0.6%~0.8%, Al2O3: 1.2%~3.7%, MgO:1.5%~3.8%, SO3: 16.5%~
18.4%, loss on ignition: 7.2%~15.1%.
The treated basalt fiber the preparation method is as follows: first by the concentrated sulfuric acid and sodium nitrate 80:1 in mass ratio mix
Afterwards, it is placed in cooling in ice bath, mixes basalt fibre when mixed solution is lower than 5 DEG C, after mixing evenly, at 20 °C
50g potassium permanganate is added, temperature is increased to 50 DEG C, and insulation reaction 5h pours into products therefrom in ice water, is added while stirring suitable
The hydrogen peroxide of amount becomes yellow to solution colour, then filters, and carries out centrifuge washing, dilute salt to product with dilute hydrochloric acid
The volume fraction of acid is 10%, until pH value, close to 7, place the product in ultrasonic disperse 4h in water, are placed in 60 DEG C of vacuum drying
Case is dried in vacuo to obtain treated basalt fiber.
The treated basalt fiber includes: SiO by mass2: 45%~53%, Al2O3: 12%~18%, CaO:
6%~10%, MgO:4%~9%, Fe2O3+ FeO:9%~15%, Na2O+K2O:3%~5%, TiO2: 1%~3%.
The additive is that 10:1's and sodium sulphate and lithium nitrate form by mass ratio；The microballon includes following quality hundred
Divide the component of ratio: CaO:11.3-15.6%, SiO2: 46.7-58.5%, Fe2O3: 4.2-5.9%, Al2O3: 16.5-22.9%,
MgO:2.7-3.8%, SO3: 0.1-0.4%, loss on ignition: 2.2-6.5%.；Its main component of the gangue is Al2O3、
SiO2, in addition also contain Fe in varying numbers2O3、CaO、MgO、Na2O、K2O、P2O5、SO3With micro rare element gallium, vanadium, titanium,
Cobalt, wherein Al2O3: 18.3-26.1%, Fe2O3: 2.5-8.5%.
The present embodiment also provides the application method of the expansion anti-crack concrete: the incorporation expansion anti-cracking waterproof in concrete
Agent, volume account for the 8% of concrete gel material total amount.
The grout material properties in each embodiment are tested using the method in following standard:
GB/T 50107-2010 " Standard for inspection and assessment of strength of concrete "；" normal concrete is long by GB/T 50082-2009
Phase performance and endurance quality test method standard ".
Certain pump station engineering C25 concrete mix is as shown in table 1 below.Test uses PO32.5 cement, and flyash is I grade
Ash, fine aggregate are fineness modulus 2.60g/cm3River sand, coarse aggregate is basaltic broken stone, and water-reducing agent is that High-efficiency polycarboxylic acid class subtracts
Aqua, the volume for expanding anti-crack water-proof agent are account for binder total amount in concrete 8%.
Table 1: concrete mix
Test result is as shown in table 2, table 3.
Embodiment 2
The present embodiment provides a kind of expansion anti-crack water-proof agents, compared with Example 1, the difference is that, cracking resistance swelling agent
5%, microballon 40%, gangue 45%, treated basalt fiber 8%, additive 2%.It is carried out using test method in embodiment 1
Test, test result is as shown in table 2, table 3.
Embodiment 3
The present embodiment provides a kind of expansion anti-crack water-proof agents, compared with Example 1, the difference is that, cracking resistance swelling agent
20%, microballon 38%, gangue 40%, treated basalt fiber 0.1%, additive 1.9%.Using test side in embodiment 1
Method is tested, and test result is as shown in table 2, table 3.
Embodiment 4
The present embodiment provides a kind of expansion anti-crack water-proof agents, compared with Example 1, the difference is that, the cracking resistance is swollen
Swollen dose the preparation method is as follows: by swelling agent, epoxy resin and amino resins 18:2:1 in mass ratio mix after, be dissolved in anhydrous
In ethanol solution, 10min is stirred evenly, 60 DEG C of vacuum oven vacuum drying removal dehydrated alcohol is placed in, it is mixed to obtain solid
Object is closed, cracking resistance swelling agent is made through grinding.
It is tested using test method in embodiment 1, test result is as shown in table 2, table 3.
Embodiment 5
The present embodiment provides a kind of expansion anti-crack water-proof agents, compared with Example 1, the difference is that, the modification is profound
Military rock fiber the preparation method is as follows: first by the concentrated sulfuric acid and sodium nitrate 60:1 in mass ratio mix after, be placed in cold in ice bath
But, basalt fibre is mixed when mixed solution is lower than 5 DEG C, after mixing evenly, 10g potassium permanganate is added at 20 °C,
Temperature is increased to 50 DEG C, insulation reaction 5h, and products therefrom is poured into ice water, suitable hydrogen peroxide is added while stirring, to molten
Liquid color becomes yellow, then filters, and carries out centrifuge washing to product with dilute hydrochloric acid, and the volume fraction of the dilute hydrochloric acid is
10%, until pH value, close to 7, place the product in ultrasonic disperse 4h in water, are placed in 60 DEG C of vacuum oven and are dried in vacuo to obtain
Treated basalt fiber.
It is tested using test method in embodiment 1, test result is as shown in table 2, table 3.
Embodiment 6
The present embodiment provides a kind of expansion anti-crack water-proof agents, compared with Example 1, the difference is that, the expansion is anti-
Split the application method of concrete: the incorporation expansion anti-crack water-proof agent in concrete, volume are to account for concrete gel material total amount
6%.
It is tested using test method in embodiment 1, test result is as shown in table 2, table 3.
Comparative example 1
This comparative example provides a kind of expansion anti-crack water-proof agent, compared with Example 1, the difference is that, the swelling agent
For be 9:1 by mass ratio calcium oxide expansion agents and calcium sulphoaluminate class swelling agent form, grinding to specific surface area be 800m2/
kg。
It is tested using test method in embodiment 1, test result is as shown in table 2, table 3.
Comparative example 2
This comparative example provides a kind of expansion anti-crack water-proof agent, compared with Example 1, the difference is that, this comparative example
Basalt fibre is directly over high-temperature fusion high speed pulling for natural basalt building stones and forms, without any modification.
It is tested using test method in embodiment 1, test result is as shown in table 2, table 3.
Comparative example 3
This comparative example provides a kind of expansion anti-crack water-proof agent, compared with Example 1, the difference is that, in concrete
Any expansion anti-crack water-proof agent is not mixed.
Test result
Embodiment 1-6 and comparative example 1-3 are tested respectively using 1 the method for embodiment, test result such as table
2, shown in table 3.
Table 2: concrete crushing strength and impervious test result
Table 3: crack-resistant performance of concrete test result.
It can be seen from the result of upper table 2 compared to comparative example 1-3 for, the expansion cracking resistance of the embodiment of the present invention 1-6 is anti-
Aqua can make concrete structure more closely knit, significantly improve the seepage-resistant grade of concrete, also have to the mechanical strength of concrete
It is certain to improve, because there are cracking resistance swelling agents and treated basalt fiber component, dual cracking resistance can be played in concrete and is prevented
The function of water effectively compensates for hindering the development in crack due to the contraction generated during concrete hydrating；In addition, expansion group
Divide and occur to chemically react with hydrolysis product of cement and generate appropriate expansion, Shrinkage Cracking of Concrete can be prevented, to greatly improve
The impervious waterproof performance of concrete.
In addition also the cracking resistance of concrete is tested, the results are shown in Table 3, shows incorporation expansion anti-crack water-proof agent
The cracking time of concrete is obviously postponed afterwards, and the area that crack occurs also gradually becomes smaller, this is possible swollen with cracking resistance in raw material
Swollen dose related with the specific ratio of treated basalt fiber, wherein when the mass ratio of cracking resistance swelling agent and treated basalt fiber is
When 10:1, the anti-cracking waterproof best performance of concrete.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (10)
1. a kind of expansion anti-crack water-proof agent, which is characterized in that the raw material comprising following mass percent: cracking resistance swelling agent 5-
30%, microballon 20-40%, gangue 25-45%, treated basalt fiber 0.1-8%, additive 1-5%, above-mentioned quality percentage
Than the sum of be 100%.
2. a kind of expansion anti-crack water-proof agent according to claim 1, which is characterized in that the preparation side of the cracking resistance swelling agent
Method is as follows: by swelling agent, epoxy resin and amino resins (85-95) in mass ratio: (10-5): after (5-1) is mixed, being dissolved in nothing
It in hydrous ethanol solution, stirs evenly, vacuum drying removal dehydrated alcohol obtains solid mixture, and cracking resistance expansion is made through grinding
Agent.
3. a kind of expansion anti-crack water-proof agent according to claim 2, which is characterized in that the swelling agent is that calcium oxide is swollen
Swollen dose, one or more of calcium sulphoaluminate class swelling agent.
4. a kind of expansion anti-crack water-proof agent according to claim 1, which is characterized in that the surface area of the cracking resistance swelling agent
For 800m2/kg。
5. a kind of expansion anti-crack water-proof agent according to claim 1, which is characterized in that the microballon includes following quality hundred
Divide the component of ratio: CaO:11.3-15.6%, SiO2: 46.7-58.5%, Fe2O3: 4.2-5.9%, Al2O3: 16.5-22.9%,
MgO:2.7-3.8%, SO3: 0.1-0.4%, loss on ignition: 2.2-6.5%.
6. a kind of expansion anti-crack water-proof agent according to claim 1, which is characterized in that the gangue includes following quality
The component of percentage: Al2O3: 18.3-26.1%, Fe2O3: 2.5-8.5%.
7. a kind of expansion anti-crack water-proof agent according to claim 1, which is characterized in that the system of the treated basalt fiber
Preparation Method is as follows: first by the concentrated sulfuric acid and sodium nitrate (60-80) in mass ratio: after 1 mixing, cooling in ice bath is placed in, when mixed
It closes when solution is lower than 5 DEG C and mixes basalt fibre, after mixing evenly, 10-50g potassium permanganate is added under room temperature, temperature is increased to
40-60 DEG C, insulation reaction 4-6h, products therefrom is poured into ice water, suitable hydrogen peroxide is added while stirring, to solution colour
Become yellow filtering, and centrifuge washing is carried out to product with dilute hydrochloric acid, until pH value is close to 7, place the product in ultrasounds point in water
It dissipates, vacuum drying obtains treated basalt fiber.
8. a kind of expansion anti-crack water-proof agent according to claim 7, which is characterized in that the volume fraction of the dilute hydrochloric acid is
10%.
9. a kind of expansion anti-crack water-proof agent according to claim 1, which is characterized in that the additive is sodium sulphate, sulphur
One or more of sour aluminium potassium, calcium nitrate, calcium formate and lithium nitrate.
10. a kind of any one of claim 1-9 application method for expanding anti-crack water-proof agent, which is characterized in that the expansion
Anti-crack water-proof agent accounts for the 6-10% of concrete gel material total amount.
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| CN113105152A (en) * | 2021-03-04 | 2021-07-13 | 武汉三源特种建材有限责任公司 | Temperature-control anti-cracking waterproof agent |
| CN115246718A (en) * | 2022-07-14 | 2022-10-28 | 武汉三源特种建材有限责任公司 | Special shrinkage regulation anti-cracking agent for ultra-high performance concrete |
| CN115819043A (en) * | 2022-12-14 | 2023-03-21 | 武汉金中海高新科技有限公司 | Mixed fiber reinforced concrete waterproof material and preparation method thereof |
| CN116535128A (en) * | 2023-04-28 | 2023-08-04 | 深圳市砼科院有限公司 | Dual anti-cracking agent for concrete and preparation method thereof |
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| CN116535128A (en) * | 2023-04-28 | 2023-08-04 | 深圳市砼科院有限公司 | Dual anti-cracking agent for concrete and preparation method thereof |
| CN116535128B (en) * | 2023-04-28 | 2024-02-23 | 深圳市砼科院有限公司 | Dual anti-cracking agent for concrete and preparation method thereof |
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