CN109485299A - A kind of multiple-effect concrete structure self-waterproofing additive with self-reparing capability - Google Patents
A kind of multiple-effect concrete structure self-waterproofing additive with self-reparing capability Download PDFInfo
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- CN109485299A CN109485299A CN201811525000.8A CN201811525000A CN109485299A CN 109485299 A CN109485299 A CN 109485299A CN 201811525000 A CN201811525000 A CN 201811525000A CN 109485299 A CN109485299 A CN 109485299A
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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
- 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
Abstract
The invention discloses a kind of multiple-effect concrete structure self-waterproofing additive with self-reparing capability, is made of the raw material of following mass percent: swelling agent 40%~60%, aluminium oxide 2%~6%, zinc sulfate 2%~5%, water-retaining agent 7%~15%, modified fluoride-containing silicone oil 4%-12%, anti-crack fiber 12%~26%, modified terephthalic acid (TPA) multivalent metal salt 2%~8%.Multiple-effect concrete structure self-waterproofing additive with self-reparing capability of the invention, the dispersibility of each raw material in concrete not only can be improved, reduce hole in concrete, increase the density of concrete, its water retention property can be improved simultaneously, shrinkage is reduced, and improves its waterproofness and the impervious cryoprotective effects of cracking resistance.
Description
Technical field
The present invention relates to concrete additive fields, and specifically, the present invention provides a kind of with self-reparing capability
Multiple-effect concrete structure self-waterproofing additive.
Background technique
With the progress of society and the improvement of people's living standards, people are to the quality of modern architecture material and wanting for function
It asks higher and higher, puts waterproof performance and durability especially for the cracking resistance of concrete.The cracking of concrete is mainly by following original
Because caused by: one, deformation can be caused to lead to cracking and seep water existing because of temperature shrinkage and dry shrink in concrete hydrating hardening process
As this can seriously affect the durability of concrete；Two, internal after concrete forming to be uniformly distributed tiny stomata, concrete will
Due to hydrostatic pressing and capillarity, there is infiltration phenomenon, lower infiltration of accumulating over a long period is to concrete and mortar even building structure
Can have a significant impact.Therefore waterproof has an important influence construction quality, solves cracking and seepage problem is that people study coagulation
One of the important directions of soil.
Waterproofing agent, which can be divided into inorganic water-proof agent, organic waterproof agent and inorganic-organic hybrid concrete by its chemical component, to be prevented
Aqua.Inorganic water-proof agent mainly passes through inorganic compound (villaumite of such as iron or aluminium) and reduces hole in concrete, improves closely knit
Property and impermeability.Organic waterproof agent, which mainly passes through organic compound (such as stearic acid), makes concrete surface form hydrophobic surface,
It improves impervious.The effects of inorganic-organic hybrid concrete waterproofer is inorganic-organic hybrid system, plays waterproof, plasticizing.
It is anti-from anti-crack water-proof agent and external coating can be divided into structure for difference in the way of solving concrete cracking seepage problem
Aqua: what structure was generallyd use from anti-cracking waterproof is swelling agent, is asked by the means that expansion compensation is shunk to reduce crack and water leakage
Topic, swelling agent are generally powder, and easily disperse does not increase the risk used；Outer waterproofing agent is mainly silanes waterproof and anticorrosion
Coating, construction technology is cumbersome, and the coating on surface is prone to wear or falls off, and the service life is usually no more than 20 years.Technical fiber is normal
Being used for concrete structure can be improved anti-impact force, the bending resistance of concrete as a kind of reinforcing material, and then improve it
Cracking resistance and waterproof performance, but under normal circumstances technical fiber exist in concrete be difficult to disperse and with matrix poor adhesion
The disadvantages of, it is restricted its application, also makes its effect of prestressed unstable.
Chinese patent CN102701635A discloses a kind of nano composite expansion antimitotic agent, and component and content are as follows:
Calcium sulphoaluminate 9.2%-27.5%, calcium aluminate 6.8%-11.2%, calcium hydroxide 7.1%-15.4%, PSP silicone powder
4.8%-13.6%, sodium metasilicate 3.6%-7.5%, ethylenediamine sodium phosphate 0.1%-3.2%, iron powder 0.5%-2.5%, borax
1.0%-3.3%, manganese dioxide 0.1%-0.5%, polypropylene fibre 0.1%-2.4%, disodium ethylene diamine tetraacetate 0.1%-
0.8%, sodium tripolyphosphate 1.8%-4.3%, flyash 15.2%-22.5%, amino-benzene oxygen naphthalene sulfonate 5.3%-
11.6%, FP nanometer polymer 5.1%-8.5%.The expansion and concrete shrinkage synchronized development that the invention product generates, not
Same time, different magnitude, different crystal mineral different role mechanism under, the filler of generation can effectively be filled in concrete
In slit.In the constraint by reinforcing bar and ortho position, the compressive pre-stress of 0.3MPa-0.8MPa can be generated, it is different in concrete
There are different expansion mine Xiang Shengcheng, the very effective early-age plastic shrinkage for controlling concrete and cement mortar, drying shrinkage etc. in age
The generation and development of non-structural crack.But directly fiber is added to exist in concrete in the patent and is difficult to asking for dispersibility
It inscribes, is easy to produce a large amount of bubbles in mixed process, and the poor adhesion of fiber and matrix can reduce its stability of anti-crack.And it should
Invention antimitotic agent can not improve the surface hydrophobic performance and impermeability of concrete, once there is fine cracks, moisture in concrete
Being easy from crack to penetrate into inside concrete will lead to concrete service life and substantially reduces.
Chinese patent CN104944822A discloses a kind of Expansive Waterproofing Admixture and preparation method thereof, and described is anti-
Aqua is prepared by each component of following weight: 15~65 parts of magnesium phosphate, 5~15 parts of magnesium ground-slag, and flyash 10~30
Part, 0.5~1 part of aluminium slag powder, 1~5 part of calcium silicates, 1~3 part of talcum powder, 1~3 part of dilute hydrochloric acid.The waterproofing agent preparation method
It is that first weighed magnesium phosphate is placed in agitator by above-mentioned each component weight correct amount, then by weighed magnesium
Ground-slag, flyash, aluminium slag powder, calcium silicates, talcum powder and dilute hydrochloric acid sequentially add in magnesium phosphate, are stirred using mechanical agitator.
Through being sufficiently stirred, in equal refining without after granule up to the Expansive Waterproofing Admixture.The invention preparation method is simple,
Easy to operate and at low cost, the waterproofing agent of preparation has nontoxic a, advantages such as volume is few, and alkalinity is low, but the patent waterproofing agent pair
In the anti-impact force of concrete, bending resistance, there is no improvement results, and concrete is caused still to be easy to produce because of external force or freeze thawing
Raw crack, and the invention antimitotic agent can not improve the surface hydrophobic performance and impermeability of concrete, once concrete occurs
Fine cracks, moisture, which is easy from crack to penetrate into inside concrete, will lead to concrete service life and substantially reduces.
The effect of existing waterproofing agent is relatively simple, water-proofing anticracking is ineffective, not to the durability improvement effect of concrete
It is good.Therefore it is badly in need of developing a kind of concrete water-proof additive of excellent combination property.
Summary of the invention
For the deficiency of the above technology, present invention seek to address that prior art problem, provides a kind of with self-reparing capability
Multiple-effect concrete structure self-waterproofing additive, not only can be improved the dispersibility of each raw material in concrete, reduce in concrete
Hole, increases the density of concrete, while its water retention property can be improved, and reduces shrinkage, and improves its waterproofness and resist
Split impervious cryoprotective effects.
Multiple-effect concrete structure self-waterproofing additive with self-reparing capability of the invention, by following mass percent
Raw material composition: swelling agent 40%~60%, zinc sulfate 2%~5%, water-retaining agent 7%~15%, is modified aluminium oxide 2%~6%
Fluorine containing silicone oil 4%-12%, anti-crack fiber 12%~26%, modified terephthalic acid (TPA) multivalent metal salt 2%~8%.
Preferably, the anti-crack fiber is polypropylene fibre, polyester fiber, Fypro, vinal, poly- third
At least one of alkene nitrile fiber, basalt fibre.
Preferably, the water-retaining agent is TYLOSE 30000, in ethoxyl methyl cellulose ether, cellulose ether
It is one or more.
Preferably, the swelling agent is Azodicarbonamide, toluene sulfonyl hydrazide, calcium oxide, calcium sulphoaluminate, magnesia expansion
One of agent is a variety of.
Preferably, have the multiple-effect concrete structure self-waterproofing additive of self-reparing capability by the original of following mass percent
Material composition: swelling agent 50%, aluminium oxide 4%, zinc sulfate 3%, water-retaining agent 10%, modified fluoride-containing silicone oil 8%, anti-crack fiber
20%, modified terephthalic acid (TPA) multivalent metal salt 5%；The swelling agent is mixed by 10% toluene sulfonyl hydrazide with 90% calcium oxide
It forms；The anti-crack fiber is mixed by 20% Fypro and 80% basalt fibre；The diameter of fiber is 10~20 μ
M, length are 1~3cm.
The modified fluoride-containing silicone oil is prepared by following methods:
(S1) 100 parts of hydrogeneous fluorosilicon oils, 30~40 parts of allyl glycidyl ethers are mixed and Karst catalyst is added, stirred
Heating is mixed, in 40~50 DEG C of 1~2h of reaction, obtains the fluorine containing silicone oil containing epoxy group；
(S2) 0.1~0.3 part of dimethyl benzylamine and 2~3 part ten are added in the fluorine containing silicone oil obtained containing epoxy group
Eight carbon -9,12- dienoic acids, stirring heating, in 100~110 DEG C of 3~4h of reaction, obtain modified fluoride-containing silicone oil.
Preferably, polyvalent metal is calcium, magnesium, zinc, at least one in iron in the modified terephthalic acid (TPA) multivalent metal salt
Kind.
The preparation method of the modified terephthalic acid (TPA) multivalent metal salt includes the following steps:
(S1) prepare or configure terephthalic acid (TPA) sodium solution；
One of following three method can be used:
(1) terephthalic acid (TPA) reacts in water with sodium hydroxide generates terephthalic acid (TPA) sodium solution；
(2) water configuration solution directly is dissolved in using para-phthalic sodium；
(3) pass through the Recycling of waste liquid of alkaline solution treatment using the nylon fabric containing para-phthalic sodium；
(S2) be added in phthalic acid sodium solution the polyvalent metal chloride stirring generate with the crystallization water to benzene two
Formic acid multivalent metal salt solid precipitating；
(S3) it will dry 8~12 hours, obtain through 80~120 DEG C after the precipitating filtering of terephthalic acid (TPA) multivalent metal salt solid
The metal salt of terephthalic acid powder of no crystal water；
(S4) modified pair is made using hydrophobicity room temperature solid organic acid and metal salt of terephthalic acid powder mixed grinding
Phthalic acid multivalent metal salt.
Preferably, the hydrophobicity room temperature solid organic acid is at least one of stearic acid, lauric acid.
It is highly preferred that the modified terephthalic acid (TPA) multivalent metal salt is modified terephthalic acid (TPA) calcium.
The terephthalic acid (TPA) multivalent metal salt of no crystal water, can be first when meeting water by taking terephthalic acid (TPA) calcium powder body as an example
Dissolution is recrystallised to the terephthalic acid (TPA) calcium crystal containing the crystallization water, and volume increases.Fine fisssure is repaired with crystal permeability plug-hole
Seam behavior.It is modified by surface, delay secondary crystallization rate, makes it in concrete aqueous mixture condensation hardening process early period
In, the terephthalic acid (TPA) calcium powder body of no crystal water is without secondary crystallization behavior, as long as seeping water in later period crack, surface coating layer
Long period of soaking is gradually destroyed in alkaline solution, and the terephthalic acid (TPA) calcium powder body of internal no crystal water is contacted with water just starts two
Secondary crystallization forms plug-hole repair.
Powder hydrophobicity modified simultaneously, it helps the hydrophobicity of inside concrete improves concrete impervious ability.
Multiple-effect concrete structure self-waterproofing additive with self-reparing capability of the invention the preparation method comprises the following steps: by cracking resistance
Fiber and modified fluoride-containing silicone oil are dispersed with stirring uniformly, and swelling agent is then added, aluminium oxide, zinc sulfate, water-retaining agent, is modified to benzene two
Formic acid multivalent metal salt, which stirs evenly, can be prepared by.
Additive amount of the multiple-effect concrete structure self-waterproofing additive in concrete with self-reparing capability of the invention
It is the 2%~5% of cement consumption.
Fluorine containing silicone oil is a kind of preferable silicone oil of hydrophobic, and fluorine containing silicone oil is modified by the present invention, modified fluoride-containing silicone oil phase
It is more preferable to the compatibility of unmodified fluorine containing silicone oil and concrete, for agent on crack resistance of concrete water penetration not only to can be improved in concrete
Property, bubble in concrete is substantially reduced, and modified fluoride-containing silicone oil can be adsorbed on the surface of anti-crack fiber and concrete, improves cracking resistance
The dispersibility of fiber and concrete, is dispersed in anti-crack fiber in concrete, and the active group on modified fluoride-containing silicone oil
The adhesiveness of anti-crack fiber and concrete can be improved, modified fluoride-containing silicone oil collaboration anti-crack fiber greatly improves the tough of concrete
Property, flexural strength and frost resistance；Swelling agent and aluminium oxide and zinc sulfate etc. cooperate in course of hardening slowly
Reaction persistently generates expansion compensation temperature shrinkage and dry contraction；Concrete water retention property, water-retaining agent can be improved in addition water-retaining agent
The surface tension for reducing concrete liquid phase is cooperateed with modified fluoride-containing silicone oil, is reduced capillary channel, is reduced the generation of desciccation crack.Change
Property terephthalic acid (TPA) multivalent metal salt and fluorine containing silicone oil synergistic effect substantially improve the inner hydrophobic of concrete, improve impervious
Energy.
Compared with prior art, the multiple-effect concrete structure self-waterproofing additive with self-reparing capability of the invention has
Beneficial effect are as follows:
(1) bubble that need to can be only substantially reduced compared with low-dosage in concrete, improves the density of concrete, improves coagulation
The hydrophobic of soil is impervious.
(2) modified fluoride-containing silicone oil cooperates with anti-crack fiber, improves anti-crack fiber and concrete dispersibility and adhesiveness, mentions significantly
Toughness, flexural strength and the frost resistance of high concrete.
(3) modified terephthalic acid (TPA) multivalent metal salt has plug-hole repair, and modified synergic fluorine containing silicone oil and cracking resistance
It is fine
Dimension is greatly improved the hydrophobicity of inside concrete, improves concrete impervious ability.
(4) swelling agent, aluminium oxide and zinc sulfate and water-retaining agent and modified fluoride-containing silicone oil, modified terephthalic acid (TPA) multivalence gold
Belong to salt and mutually cooperate with the generation for substantially reducing crack, improves impervious frost resistance.
Specific embodiment
For better comparative experiments effect, modified terephthalic acid (TPA) multivalent metal salt uses following phase in present embodiment
Same method preparation:
(S1) water configuration solution directly is dissolved in using para-phthalic sodium；
(S2) the chloride stirring that the polyvalent metal is added in phthalic acid sodium solution generates the terephthaldehyde with the crystallization water
Sour multivalent metal salt solid precipitating；
(S3) it will dry 8~12 hours, obtain through 80~120 DEG C after the precipitating filtering of terephthalic acid (TPA) multivalent metal salt solid
The metal salt of terephthalic acid powder of no crystal water；
(S4) it is mixed using lauric acid with metal salt of terephthalic acid powder with 1:3 mass ratio and is ground in the ball mill
Modified terephthalic acid (TPA) multivalent metal salt is made in 20min.
Clear, complete description is carried out to each technical solution of the present invention with reference to embodiments, it is clear that described implementation
Example is only a part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiment of the present invention, this field is common
Technical staff's obtained all other embodiment without making creative work belongs to the present invention and is protected
Range.Those skilled in the art according to method, process route made by following implementation, function equivalent transformation or replace
Generation, all belong to the scope of protection of the present invention within.
Embodiment 1
The multiple-effect concrete structure self-waterproofing additive with self-reparing capability of the present embodiment, by following mass percent
Raw material composition: calcium oxide swelling agent 60%, aluminium oxide 2%, zinc sulfate 2%, TYLOSE 30000 12%, modified fluoride-containing silicon
Oil 4%, polypropylene fibre (3~5 μm of diameter, 5~8mm of length) 12%, modified terephthalic acid (TPA) iron 8%.
The modified fluoride-containing silicone oil is prepared by following methods:
(S1) 100 parts of hydrogeneous fluorosilicon oils (hydrogen content 0.4%, viscosity 50cs), 40 parts of allyl glycidyl ethers are mixed
Karst catalyst, which is added, makes Pt content 20ppm in mixture, and stirring heating in 50 DEG C of reaction 1h, is obtained containing epoxy group
Fluorine containing silicone oil；
(S2) 0.3 part of dimethyl benzylamine and 3 parts of Linolenic Acids are added in the fluorine containing silicone oil obtained containing epoxy group,
12- dienoic acid, stirring heating, in 110 DEG C of reaction 4h, obtains modified fluoride-containing silicone oil.
Embodiment 2
The multiple-effect concrete structure self-waterproofing additive with self-reparing capability of the present embodiment, by following mass percent
Raw material composition: Azodicarbonamide swelling agent 40%, aluminium oxide 6%, zinc sulfate 5%, ethoxyl methyl cellulose ether 10%,
Modified fluoride-containing silicone oil 11%, basalt fibre (30~50 μm of diameter, 1~3cm of length) 26%, modified terephthalic acid (TPA) magnesium 2%.
The modified fluoride-containing silicone oil is prepared by following methods:
(S1) 100 parts of hydrogeneous fluorosilicon oils (hydrogen content 0.6%, viscosity 25cs), 30 parts of allyl glycidyl ethers are mixed
Karst catalyst, which is added, makes Pt content 10ppm in mixture, and stirring heating in 40 DEG C of reaction 2h, is obtained containing epoxy group
Fluorine containing silicone oil；
(S2) 0.3 part of dimethyl benzylamine and 3 parts of Linolenic Acids are added in the fluorine containing silicone oil obtained containing epoxy group,
12- dienoic acid, stirring heating, in 100 DEG C of reaction 3h, obtains modified fluoride-containing silicone oil.
Embodiment 3
The multiple-effect concrete structure self-waterproofing additive with self-reparing capability of the present embodiment, by following mass percent
Raw material composition: it is swelling agent 50%, aluminium oxide 4%, zinc sulfate 3%, cellulose ether 10%, modified fluoride-containing silicone oil 8%, anti-
Split fiber 20%, modified terephthalic acid (TPA) calcium 5%；The swelling agent mixed by 10% toluene sulfonyl hydrazide with 90% calcium oxide and
At；The anti-crack fiber is mixed by 20% Fypro and 80% basalt fibre；The diameter of fiber is 10~20 μm,
Length is 1~3cm.
The modified fluoride-containing silicone oil is prepared by following methods:
(S1) 100 parts of hydrogeneous fluorosilicon oils (hydrogen content 0.5%, viscosity 30cs), 35 parts of allyl glycidyl ethers are mixed
Karst catalyst, which is added, makes Pt content 15ppm in mixture, and stirring heating in 40 DEG C of reaction 2h, is obtained containing epoxy group
Fluorine containing silicone oil；
(S2) 0.2 part of dimethyl benzylamine and 3 parts of Linolenic Acids are added in the fluorine containing silicone oil obtained containing epoxy group,
12- dienoic acid, stirring heating, in 110 DEG C of reaction 3h, obtains modified fluoride-containing silicone oil.
Comparative example 1
Compared to embodiment 3, modified fluoride-containing silicone oil in embodiment 3 is replaced with non-modified hydrogeneous fluorine silicon by this comparative example
Oil, it is other same as Example 3.
The waterproof additive of this comparative example and concrete after mixing, stand storage 10min, concrete surface occur compared with
More oil slick.
Comparative example 2
Compared to embodiment 3, this comparative example, which is reduced, does not contain anti-crack fiber in component, other same as Example 3.
Comparative example 3
Compared to embodiment 3, the modified fluoride-containing silicone oil of this comparative example is prepared by following methods:
(S1) 100 parts of hydrogeneous fluorosilicon oils (hydrogen content 0.5%, viscosity 30cs), 35 parts of allyl glycidyl ethers are mixed
Karst catalyst, which is added, makes Pt content 15ppm in mixture, and stirring heating in 40 DEG C of reaction 2h, obtains modified fluoride-containing silicon
Oil.
The waterproof additive and concrete of this comparative example after mixing, stand storage 10min, and concrete surface lacks
Measure oil slick.
Comparative example 4
Compared to embodiment 3, modified fluoride-containing silicone oil is substituted for glycerine by this comparative example, other same as Example 3.
Comparative example 5
Compared to embodiment 3, this comparative example removes modified terephthalic acid (TPA) calcium, other same as Example 3.
As a control group with normal concrete, waterproof additive is not added in normal concrete, embodiment and comparative example
Waterproof additive is added in concrete with the 3% of cement quality, detects the properties of embodiment and comparative example.Benchmark coagulation
Raw material ratio used in soil is shown in Table 1.
Test item includes: the static contact angle and mechanical property and the impervious performances such as freeze proof of concrete surface and water.
Concrete crushing strength, flexural strength, shrinkage ratio are carried out according to JCT474-2008 " mortar concrete waterproofing agent professional standard "
Test, early anti-cracking behavior can measure test with reference to T/CECS10001-2017 " for the waterproofing and anti-leakage composite material in concrete "
Middle progress.Seepage-resistant grade test is carried out referring to GB50108-2008 " Technical code for water proof in underground engineering "；Freeze proof level estimate ginseng
It is carried out according to GBJ50164-2011 " Standard for quality control of concrete ".Test result is shown in Table 2.
1 normal concrete of table matches (unit K g/m3)
Table 2: the test result of different waterproof additives is added in normal concrete
Relative datum concrete can be seen that by above-mentioned test result, by the embodiment of the present invention with self-reparing capability
After multiple-effect concrete structure self-waterproofing additive application is into concrete, the Static water contact angles of concrete can be greatly improved,
The bubble inside fresh concrete is reduced, promotes its mechanical property, especially its 28 days flexural strength, and can effectively drop
The shrinking percentage of low concrete, improve concrete seepage-resistant grade and freeze proof grade.
After the self waterproofing additive of the embodiment of the present invention is added in normal concrete, the air content of normal concrete from
2.4% be reduced to 1.6% hereinafter, and mix the embodiment of the present invention self waterproofing additive concrete compared to normal concrete
It being significantly improved with the static contact angle of water, flexural strength improves each ratio material matching of 10% or more, especially embodiment 3,
Comprehensive performance is more best, and shrinking percentage and fracture coefficient significantly reduce, and freeze proof grade and seepage-resistant grade significantly improve.
And individually comparative example 1,3,4 and embodiment 3 are it can be found that if modified fluoride-containing silicone oil being removed, replace or is changed
Preparation method can all be such that the air content in concrete increases, and significantly reduce with the static contact angle of water, mechanical property and impervious
Freeze proof grade is significantly reduced, and the concrete of comparative example 1 and 3 mixed with additive after be easy to appear oil slick.This illustrates this
The modified fluoride-containing silicone oil of invention preparation can significantly improve concrete surface waterproofness and reduce air content therein, this may be
Since the active group in modified fluoride-containing silicone oil can be formed on its surface grafting in conjunction with concrete or anti-crack fiber, this
Its dispersibility not only can be improved in sample, can also improve its toughness and water impermeability and anti-freezing property.Without modified or
Changing preparation method can all make fluorine containing silicone oil compatibility in concrete poor, and the active group in fluorine containing silicone oil reduces, nothing
Method is grafted on concrete or anti-crack fiber surface, so that its dispersibility and impervious frost resistance can not be significantly improved.
In comparative example 2 when not adding anti-crack fiber, although the flexural strength of concrete, cracking resistance are compared with normal concrete
It increases, but improvement is significantly not so good as embodiment 3, opposite its seepage-resistant grade of embodiment 3 and freeze proof grade also significantly drop
It is low.
Independent comparative example 5 and embodiment 3 it can be found that remove in modified terephthalic acid (TPA) multivalent metal salt concrete with water
Static contact angle significantly reduce, impervious freeze proof grade is significantly reduced.This is because modified terephthalic acid (TPA) multivalent metal salt
Not only there is plug-hole repair, it helps the hydrophobicity for improving inside concrete improves concrete impervious ability.
In view of the foregoing it is apparent that anti-crack fiber of the invention, modified fluoride-containing silicone oil, modified terephthalic acid (TPA) polyvalent metal
The raw materials such as salt and swelling agent, water-retaining agent are with mutually acting synergistically, various raw materials of only arranging in pairs or groups within the scope of the present invention
Using the intensity that could more significantly improve concrete, improve the performances such as water proof anti-seepage is freeze proof of concrete.Remove or change and appoints
A kind of what raw material or the preparation method for changing modified fluoride-containing silicone oil can all make a significant impact its effect.
The basic principles, main features and advantages of the invention have been shown and described above, while there has been shown and described that
The embodiment of the present invention, for the ordinary skill in the art, it is possible to understand that do not departing from the principle of the present invention and essence
A variety of change, modification, replacement and modification can be carried out to these embodiments in the case where mind, the scope of the present invention is by appended right
It is required that and its equivalent restriction.
Claims (9)
1. a kind of multiple-effect concrete structure self-waterproofing additive with self-reparing capability, which is characterized in that by following quality hundred
The raw material of ratio is divided to form: swelling agent 40%~60%, aluminium oxide 2%~6%, zinc sulfate 2%~5%, water-retaining agent 7%~
15%, modified fluoride-containing silicone oil 4%-12%, anti-crack fiber 12%~26%, modified terephthalic acid (TPA) multivalent metal salt 2%~
8%.
2. the multiple-effect concrete structure self-waterproofing additive according to claim 1 with self-reparing capability, feature exist
In, the anti-crack fiber be polypropylene fibre, it is polyester fiber, Fypro, vinal, polyacrylonitrile fibre, profound
At least one of military rock fiber.
3. the multiple-effect concrete structure self-waterproofing additive according to claim 1 with self-reparing capability, feature exist
In the water-retaining agent is one of TYLOSE 30000, ethoxyl methyl cellulose ether, cellulose ether or a variety of.
4. the multiple-effect concrete structure self-waterproofing additive according to claim 1 with self-reparing capability, feature exist
In, the swelling agent be one of Azodicarbonamide, toluene sulfonyl hydrazide, calcium oxide, calcium sulphoaluminate, MgO expansion agent or
It is a variety of.
5. the multiple-effect concrete structure self-waterproofing additive according to claim 1 with self-reparing capability, feature exist
In being made of the raw material of following mass percent: swelling agent 50%, aluminium oxide 4%, zinc sulfate 3%, water-retaining agent 10%, modified
Fluorine containing silicone oil 8%, anti-crack fiber 20%, modified terephthalic acid (TPA) multivalent metal salt 5%；
The swelling agent is mixed by 10% toluene sulfonyl hydrazide with 90% calcium oxide；The anti-crack fiber is by 20% polyamide
Fiber and 80% basalt fibre mix；The diameter of fiber is 10~20 μm, and length is 1~3cm.
6. according to claim 1 to 5 described in any item multiple-effect concrete structure self-waterproofing additives with self-reparing capability,
It is characterized in that, the modified fluoride-containing silicone oil is prepared by following methods:
(S1) 100 parts of hydrogeneous fluorosilicon oils, 30~40 parts of allyl glycidyl ethers are mixed and Karst catalyst is added, stirring rises
Temperature obtains the fluorine containing silicone oil containing epoxy group in 40~50 DEG C of 1~2h of reaction；
(S2) 0.1~0.3 part of dimethyl benzylamine and 2~3 part of 18 carbon-are added in the fluorine containing silicone oil obtained containing epoxy group
9,12- dienoic acids, stirring heating, in 100~110 DEG C of 3~4h of reaction, obtain modified fluoride-containing silicone oil.
7. according to claim 1 to 5 described in any item multiple-effect concrete structure self-waterproofing additives with self-reparing capability,
It is characterized in that, polyvalent metal is at least one of calcium, magnesium, zinc, iron in the modified terephthalic acid (TPA) multivalent metal salt.
8. the multiple-effect concrete structure self-waterproofing additive according to claim 7 with self-reparing capability, feature exist
In the preparation method of the modified terephthalic acid (TPA) multivalent metal salt includes the following steps:
(S1) prepare or configure terephthalic acid (TPA) sodium solution；
(S2) the chloride stirring that the polyvalent metal is added in phthalic acid sodium solution generates the terephthalic acid (TPA) with the crystallization water
Multivalent metal salt solid precipitating；
(S3) it will be dried 8~12 hours after the precipitating filtering of terephthalic acid (TPA) multivalent metal salt solid through 80~120 DEG C, obtain no knot
The metal salt of terephthalic acid powder of brilliant water；
(S4) it is made modified to benzene two using hydrophobicity room temperature solid organic acid and metal salt of terephthalic acid powder mixed grinding
Formic acid multivalent metal salt.
9. the multiple-effect concrete structure self-waterproofing additive according to claim 8 with self-reparing capability, feature exist
In the hydrophobicity room temperature solid organic acid is at least one of stearic acid, lauric acid.
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| CN114478064A (en) * | 2021-12-28 | 2022-05-13 | 青岛理工大学 | Concrete curing agent, curing coating and preparation method thereof |
| CN116332560A (en) * | 2023-03-16 | 2023-06-27 | 江苏同禹新材料科技有限公司 | Anti-cracking waterproof composite additive for concrete and preparation method and application thereof |
| CN117383843A (en) * | 2023-08-30 | 2024-01-12 | 福建源鑫建材有限公司 | High-strength all-solid waste cementing material and preparation method and application thereof |
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| CN117383843B (en) * | 2023-08-30 | 2024-04-12 | 福建源鑫建材有限公司 | High-strength all-solid waste cementing material and preparation method and application thereof |
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