CN109053023A - A kind of swelling fiber anti-crack water-proof agent - Google Patents
A kind of swelling fiber anti-crack water-proof agent Download PDFInfo
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- CN109053023A CN109053023A CN201810947709.0A CN201810947709A CN109053023A CN 109053023 A CN109053023 A CN 109053023A CN 201810947709 A CN201810947709 A CN 201810947709A CN 109053023 A CN109053023 A CN 109053023A
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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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
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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
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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
- C04B2103/601—Agents for increasing frost resistance
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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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a kind of swelling fiber anti-crack water-proof agents, be made of the raw material of following mass percent: cracking resistance swelling agent 10%~30%, microballon powder 20%~40%, gangue 30%~45%, treated basalt fiber 0.5%~5%, cellulose graft shell be poly- 0.4%~2%, early strength agent 1%~2%, water-reducing agent 0.5%~1.0%, defoaming agent 0.1%~0.2%, and the sum of mass percent of above each raw material is 100%.Swelling fiber anti-crack water-proof agent provided by the invention has the function of dual cracking resistance and waterproof, cracking resistance swelling agent and treated basalt fiber and cellulose graft chitosan in composite material can improve dispersibility of the anti-crack water-proof agent in concrete, superposition compensation contraction is played in concrete, it is effectively prevented from micro-crack caused by due to each age difference of concrete, the flexural strength and impermeability and frost resistance of concrete can be improved in the generation and development for preventing and inhibiting crack.
Description
Technical field
The present invention relates to the field of building materials, and specifically, the present invention provides a kind of swelling fiber anti-crack water-proof agents.
Background technique
Increasing with construction project, Shrinkage Cracking of Concrete problem but becomes increasingly conspicuous, and has seriously affected
Durability, bearing capacity and the waterproof performance of concrete., mainly there are three aspects in the reason of Concrete Structure Crack: first is that outer
What portion's load caused, such crack presence is the most universal, and predominantly unreasonable structural design, safety coefficient are inadequate, do not consider to apply
The problems such as a possibility that work, the insufficient rigidity of structure；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 border working condition and conventionally calculation, and then causes secondary stress to lead to structure crack at certain positions；
Third is that distortional stress caused, mainly the structure due to caused by the factors such as temperature, contraction, steel bar corrosion, differential settlement becomes
Shape generates stress when deformation suffers restraints, and just generates crack when this stress is more than concrete tensile strength.To avoid mixing
Solidifying soil cracking, the prior art mainly use optimised coagulation soil mix-design, increase the ratio of reinforcement, reduce hydration heat of concrete, add
Add the methods of fiber and swelling agent.Currently, most engineering applications swelling agent or fiber improve the compactness of concrete, rise
To compensation contraction, the cracking of concrete is prevented, but traditional swelling agent or fiber is by volume, use condition, dispersion performance
It is affected with curing condition etc., is also easy to produce that concrete flexural strength reduces, frost resistance is poor, poor dispersion, it is impervious etc.
The problems such as grade is low, and cracking resistance durability is poor.
In addition currently on the market, most of high-performance cement expansive agent is calcined by main raw material(s) of lime stone,
It obtains taking free calcium oxide as the calcium oxide expansion agents for stablizing expansion sources.But this kind of swelling agent early hydration rate is fast, so that
Most of expansion energy is just consumed in concrete plastic stage, and compensation contractility is insufficient in effectively expansion window, is not achieved
It is expected that the effect that compensation is shunk；And free calcium oxide concentrates heat release to will increase concrete temperature rise in such swelling agent, makes concrete
Cracking risk increases.Therefore, in view of the above problems, being badly in need of optimizing calcium oxide expansion agents.
Chinese patent CN104355561B discloses a kind of anti-crack water-proof agent for concrete, including (by mass): sulphur aluminic acid
Calcium class cracking resistance clinker: 5.0%~25.0%, wood fibre: 0.1%~1.0%, calcium gluconate: 0.1%~1.0%, fine coal
Ash: 20.0%~45.0%, gangue: 20.0%~45.0%, anhydrite: 30.0%~60.0%, above-mentioned mass percent
The sum of be 100%.The method for preparing anti-crack water-proof agent for concrete, including by calcium sulphoaluminate class cracking resistance clinker, flyash, bastard coal
Stone, anhydrite after mix grinding to predetermined fineness, are made after mixing evenly with wood fibre, calcium gluconate.Provided in the invention
Water-proofing anticracking agent using wood fibre improve concrete anti-cracking waterproof performance, but use concrete in wood fibre is added
It will lead to its antiseepage grade and freeze proof grade be not high, cracking resistance durability is poor, and influences its flexural strength.
Summary of the invention
For the deficiency of the above technology, the present invention is intended to provide a kind of swelling fiber anti-crack water-proof agent, can be improved coagulation
Soil flexural strength and make concrete have good water impermeability, frost resistance and cracking resistance durability.
Swelling fiber anti-crack water-proof agent of the invention, is made of the raw material of following mass percent: cracking resistance swelling agent 10%
~30%, microballon powder 20%~40%, gangue 30%~45%, treated basalt fiber 0.5%~5%, cellulose graft
Shell is poly- 0.4%~2%, early strength agent 1%~2%, water-reducing agent 0.5%~1.0%, defoaming agent 0.1%~0.2%, above each original
The sum of mass percent of material is 100%.Above each raw material is stirred evenly in blender and obtains expansion fibre of the invention
Tie up anti-crack water-proof agent.
Preferably, the treated basalt fiber the preparation method is as follows:
(S1) basalt fibre is cleaned with the dilute hydrochloric acid that HCl content is 10% first；
(S2) concentrated sulfuric acid and nitric acid mixed liquor that mass ratio is 40~50:1 are prepared, cooling in ice bath is placed in, works as mixing
When solution is lower than 5 DEG C, the basalt fibre after cleaning is added, is stirred evenly, reacts 10min；
(S3) HNO is added to basalt fibre made from (S2)3Content is the nitric acid hydrogen that 30wt% and HF content is 20%
Fluoric acid mixed solution, temperature are increased to 50 DEG C, insulation reaction 20min；
(S4) by basalt fibre obtained by (S3) is 5% with HF content and HCl content is 5% hydrofluoric acid hydrochloric acid mixed solution
Centrifuge washing is carried out to product, until pH value is close to 6；
(S5) basalt fibre obtained by (S4) is added in the mixed solution for the second alcohol and water that mass ratio is 5:5, is added
The coupling agent SEA-171 of 1wt%N- (β-aminoethyl)-γ-aminopropyltriethoxy dimethoxysilane and 2wt% is reacted at 50 DEG C
2h adds 5% acrylic acid -2- hydroxyl ethyl ester and 0.25% azodiisobutyronitrile and 0.5% double amber imide suberic acid
Ester sulfonate sodium is in 80 DEG C of reaction 1h；
(S6) dilute hydrochloric acid and water that the basalt fibre that (S5) is obtained is 5% with HCl content are cleaned by ultrasonic, until
PH value is placed in drying in 60 DEG C of vacuum oven, obtains treated basalt fiber close to 7.
Preferably, the cellulose graft chitosan is acetylbutyrylcellulose grafted chitosan.
Preferably, the cracking resistance swelling agent the preparation method is as follows: by mass percent be 2.5% sodium sulphate, 2.5%
Ammonium hydrogen sulfate and 95% calcium oxide expansion agents, be put into ball mill ball milling 30min together, 80 μm of square hole screens of rear mistake are made
Cracking resistance swelling agent.
Preferably, the specific surface area of the calcium oxide expansion agents is 150~400m2/ kg, wherein free calcium oxide (f-
CaO) content is 20~85wt%.
Preferably, the microballon powder is flyash extract, bulk density >=700kg/m3, dioxide-containing silica >=
50%, aluminum oxide content >=20%.
Preferably, Al in the gangue2O3Content 18.3%~26.1wt%, Fe2O32.5%~8.5wt% of content.
Preferably, the early strength agent is one of sodium sulphate, aluminum aluminum sulfate, calcium nitrate, calcium formate and lithium nitrate or several
Kind.
Preferably, the water-reducing agent is polycarboxylic acids dehydragent, glue sand water-reducing rate >=25%.
Preferably, the defoaming agent is Polyether Modified Polysiloxanes Defoaming Agent.
The application method of above-mentioned swelling fiber anti-crack water-proof agent: the 6%-10% of binder total amount in concrete is accounted for.
The advantages of the present invention:
The anti-folding of concrete not only can be improved using treated basalt fiber and cellulose graft chitosan by the present invention
Intensity, moreover it is possible to cooperate with cracking resistance swelling agent played in concrete superposition compensation contraction, have good cracking resistance durability and
Water proof anti-seepage function, can with micro-crack caused by each age difference reason of compensating concrete, prevent and inhibit crack generation and
Development.
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；The concentrated sulfuric acid is used in the preparation method of treated basalt fiber
And nitric acid and nitric acid and hydrofluoric acid handle basalt fibre step by step, can increase the surface active groups of basalt fibre,
The growth of its surface hydration is attached to concrete, place is provided, crystal structure can be refined, keep concrete structure more closely knit；Together
When basalt fibre surface grafting polymerization object molecule, improve the intensity and waterproofness of concrete.
Cellulose graft chitosan is preferably acetylbutyrylcellulose grafted chitosan, can cooperate with and mention with basalt fibre
The intensity of high concrete and impervious anti-freezing property.
Cracking resistance swelling agent is modified by using special ratios sodium sulphate, ammonium hydrogen sulfate, calcium oxide can be reduced
The early hydration rate of swelling agent reduces it in concrete plastic stage and expands the loss of energy, it is swollen can not only to guarantee that early period has
Swollen rate can also play the role of being obviously improved, and to concrete in later period slow release swelling agent to endurance performance of concrete
Gelling time influence is smaller, can improve its slump and divergence to a certain degree, be more advantageous to concrete construction.
Incorporation microballon powder and gangue can largely improve the workability of concrete, make up since expansion component draws
The negative effect risen；Incorporation early strength agent can regulate and control the hydration reaction ability of cracking resistance swelling agent, microballon powder and gangue, accelerate early
Phase reaction rate.
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
Suitable for underground anti-cracking waterproof engineering, super-long structural engineering, civil air defense constructions and installations, express highway pavement, tunnel, harbour and reservoir dam
Etc. Structural Engineerings construction and concrete maintenance, have to the tensile strength of concrete, toughness, anti-permeability performance, cracking resistance bright
Aobvious improvement result substantially improves anti-cracking impervious performance, shock resistance and the shock resistance of concrete.
Specific embodiment
A kind of swelling fiber anti-crack water-proof agent of the invention, is made of: cracking resistance swelling agent the raw material of following mass percent
10%~30%, microballon powder 20%~40%, gangue 30%~45%, treated basalt fiber 0.5%~5%, cellulose
Graft shell is poly- 0.4%~2%, early strength agent 1%~2%, water-reducing agent 0.5%~1.0%, defoaming agent 0.1%~0.2%, above
The sum of mass percent of each raw material is 100%.
For better comparative illustration experiment effect, cracking resistance swelling agent described in following embodiment uses identical preparation side
Method:: by mass percent be 2.5% sodium sulphate, 2.5% ammonium hydrogen sulfate and 95% calcium oxide expansion agents, put together
Enter ball mill ball milling 30min, cracking resistance swelling agent is made in 80 μm of square hole screens of rear mistake." calcium oxide expansion agents " are all made of Wuhan three
The FQY high-performance calcium oxide class swelling agent of source special type building materials Co., Ltd production, chemical analysis are as shown in table 1 below.
Table 1: calcium oxide expansion agents chemical analysis/%
| Loss | SO3 | SiO2 | Fe2O3 | Al2O3 | CaO | MgO | f-CaO |
| 2.10 | 19.72 | 2.00 | 1.19 | 4.39 | 68.62 | 1.74 | 47.72 |
Microballon powder described in embodiment is same batch flyash extract, bulk density >=700kg/m3, titanium dioxide
Silicone content >=50%, aluminum oxide content >=20%；The gangue is same batch, wherein Al2O3Content 20%~
22wt%, Fe2O34.5%~6.5wt% of content.
Defoaming agent described in the embodiment of the present invention is Polyether Modified Polysiloxanes Defoaming Agent.
Cement in the present invention examines dedicated fiducial using the concrete admixture of Shandong Lu Cheng Cement Co., Ltd production
Cement.
Water-reducing agent in the embodiment of the present invention is the Ujoin-PC polycarboxylic acids of Wuhan Ujoin Building Material Technology Co., Ltd.'s production
Water-reducing agent.
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 swelling fiber anti-crack water-proof agent of the present embodiment, is made of the raw material of following mass percent: cracking resistance swelling agent
30%, microballon powder 20%, gangue 45%, treated basalt fiber 0.5%, carboxymethyl cellulose grafted chitosan 2%, sulfuric acid
Sodium 1.3%, water-reducing agent 1.0%, defoaming agent 0.2%.
The treated basalt fiber the preparation method is as follows:
(S1) basalt fibre is cleaned with the dilute hydrochloric acid that HCl content is 10% first；
(S2) concentrated sulfuric acid and nitric acid mixed liquor that mass ratio is 50:1 are prepared, cooling in ice bath is placed in, works as mixed solution
When lower than 5 DEG C, the basalt fibre after cleaning is added, is stirred evenly, reacts 10min；
(S3) HNO is added to basalt fibre made from (S2)3Content is the nitric acid hydrogen that 30wt% and HF content is 20%
Fluoric acid mixed solution, temperature are increased to 50 DEG C, insulation reaction 20min；
(S4) by basalt fibre obtained by (S3) is 5% with HF content and HCl content is 5% hydrofluoric acid hydrochloric acid mixed solution
Centrifuge washing is carried out to product, until pH value is close to 6；
(S5) basalt fibre obtained by (S4) is added in the mixed solution for the second alcohol and water that mass ratio is 5:5, is added
The coupling agent SEA-171 of 1wt%N- (β-aminoethyl)-γ-aminopropyltriethoxy dimethoxysilane and 2wt% is reacted at 50 DEG C
2h adds 5% acrylic acid -2- hydroxyl ethyl ester and 0.25% azodiisobutyronitrile and 0.5% double amber imide suberic acid
Ester sulfonate sodium is in 80 DEG C of reaction 1h；
(S6) dilute hydrochloric acid and water that the basalt fibre that (S5) is obtained is 5% with HCl content are cleaned by ultrasonic, until
PH value is placed in drying in 60 DEG C of vacuum oven, obtains treated basalt fiber close to 7.
Embodiment 2
The swelling fiber anti-crack water-proof agent of the present embodiment, is made of the raw material of following mass percent: cracking resistance swelling agent
10%, microballon powder 40%, gangue 42%, treated basalt fiber 5%, carboxymethyl cellulose grafted chitosan 0.4%, sulfuric acid
Aluminium potassium 2%, water-reducing agent 0.5%, defoaming agent 0.1%.
The treated basalt fiber the preparation method is as follows:
(S1) basalt fibre is cleaned with the dilute hydrochloric acid that HCl content is 10% first；
(S2) concentrated sulfuric acid and nitric acid mixed liquor that mass ratio is 40:1 are prepared, cooling in ice bath is placed in, works as mixed solution
When lower than 5 DEG C, the basalt fibre after cleaning is added, is stirred evenly, reacts 10min；
(S3) HNO is added to basalt fibre made from (S2)3Content is the nitric acid hydrogen that 30wt% and HF content is 20%
Fluoric acid mixed solution, temperature are increased to 50 DEG C, insulation reaction 20min；
(S4) by basalt fibre obtained by (S3) is 5% with HF content and HCl content is 5% hydrofluoric acid hydrochloric acid mixed solution
Centrifuge washing is carried out to product, until pH value is close to 6；
(S5) basalt fibre obtained by (S4) is added in the mixed solution for the second alcohol and water that mass ratio is 5:5, is added
The coupling agent SEA-171 of 1wt%N- (β-aminoethyl)-γ-aminopropyltriethoxy dimethoxysilane and 2wt% is reacted at 50 DEG C
2h adds 5% acrylic acid -2- hydroxyl ethyl ester and 0.25% azodiisobutyronitrile and 0.5% double amber imide suberic acid
Ester sulfonate sodium is in 80 DEG C of reaction 1h；
(S6) dilute hydrochloric acid and water that the basalt fibre that (S5) is obtained is 5% with HCl content are cleaned by ultrasonic, until
PH value is placed in drying in 60 DEG C of vacuum oven, obtains treated basalt fiber close to 7.
Embodiment 3
The swelling fiber anti-crack water-proof agent of the present embodiment, is made of the raw material of following mass percent: cracking resistance swelling agent
20%, microballon powder 30%, gangue 42.9%, treated basalt fiber 3%, carboxymethyl cellulose grafted chitosan 1.5%, first
Sour calcium 1.6%, calcium nitrate 0.4%, water-reducing agent 0.5%, defoaming agent 0.1%.
The treated basalt fiber the preparation method is as follows:
(S1) basalt fibre is cleaned with the dilute hydrochloric acid that HCl content is 10% first；
(S2) concentrated sulfuric acid and nitric acid mixed liquor that mass ratio is 45:1 are prepared, cooling in ice bath is placed in, works as mixed solution
When lower than 5 DEG C, the basalt fibre after cleaning is added, is stirred evenly, reacts 10min；
(S3) HNO is added to basalt fibre made from (S2)3Content is the nitric acid hydrogen that 30wt% and HF content is 20%
Fluoric acid mixed solution, temperature are increased to 50 DEG C, insulation reaction 20min；
(S4) by basalt fibre obtained by (S3) is 5% with HF content and HCl content is 5% hydrofluoric acid hydrochloric acid mixed solution
Centrifuge washing is carried out to product, until pH value is close to 6；
(S5) basalt fibre obtained by (S4) is added in the mixed solution for the second alcohol and water that mass ratio is 5:5, is added
The coupling agent SEA-171 of 1wt%N- (β-aminoethyl)-γ-aminopropyltriethoxy dimethoxysilane and 2wt% is reacted at 50 DEG C
2h adds 5% acrylic acid -2- hydroxyl ethyl ester and 0.25% azodiisobutyronitrile and 0.5% double amber imide suberic acid
Ester sulfonate sodium is in 80 DEG C of reaction 1h；
(S6) dilute hydrochloric acid and water that the basalt fibre that (S5) is obtained is 5% with HCl content are cleaned by ultrasonic, until
PH value is placed in drying in 60 DEG C of vacuum oven, obtains treated basalt fiber close to 7.
Embodiment 4
Compared to embodiment 3, the swelling fiber anti-crack water-proof agent of the present embodiment uses acetylbutyrylcellulose grafted chitosan
Carboxymethyl cellulose grafted chitosan is substituted, it is other same as Example 3.
Comparative example 1
Compared to embodiment 3, the waterproofing agent of this comparative example uses basalt fibre to be directly over height for natural basalt building stones
Temperature melting high speed pulling forms, other same as Example 3 without any modification.
Comparative example 2
Compared to embodiment 3, the waterproofing agent of this comparative example, using the direct ball mill ball milling 30min of calcium oxide expansion agents, after
It crosses 80 μm of square hole screens to obtain, does not add any modifying agent, it is other same as Example 3.
Comparative example 3
Compared to embodiment 3, the waterproofing agent of this comparative example does not add carboxymethyl cellulose grafted chitosan, other and implementation
Example 3 is identical.
Comparative example 4
Compared to embodiment 3, the waterproofing agent of this comparative example is poly- using polypropylene fibre substitution carboxymethyl cellulose graft shell
Sugar, it is other same as Example 3.
Comparative example 5
Compared to embodiment 3, the waterproofing agent of this comparative example, the treated basalt fiber the preparation method is as follows:
(S1) basalt fibre is cleaned with the dilute hydrochloric acid that HCl content is 10% first；
(S2) concentrated sulfuric acid and nitric acid mixed liquor that mass ratio is 45:1 are prepared, cooling in ice bath is placed in, works as mixed solution
When lower than 5 DEG C, the basalt fibre after cleaning is added, is stirred evenly, reacts 10min；
(S3) HNO is added to basalt fibre made from (S2)3Content is the nitric acid hydrogen that 30wt% and HF content is 20%
Fluoric acid mixed solution, temperature are increased to 50 DEG C, insulation reaction 20min；
(S4) dilute hydrochloric acid and water that the basalt fibre that (S3) is obtained is 5% with HCl content are cleaned by ultrasonic, until
PH value is placed in drying in 60 DEG C of vacuum oven, obtains treated basalt fiber close to 7.
It is other same as Example 3.
Above embodiments and comparative example mix incorporation waterproofing agent in each embodiment with reference to the method in following standard
Solidifying soil carries out properties into test: GB/T 50107-2010 " Standard for inspection and assessment of strength of concrete "；GB/T 50082-
2009 " Standard for test methods of longterm performance and durability of ordinary concrete standards ".
Certain pump station engineering C25 concrete mix is as shown in table 2 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 of swelling fiber anti-crack water-proof agent are account for binder total amount in concrete 6%.
Table 2: concrete mix
Blank example
Swelling fiber anti-crack water-proof agent is not added in the concrete of this blank example, carries out test performance using the above method.
Shown in test result is as follows table 3 and table 4.
Table 3: concrete strength and impervious freeze proof test result
Table 4: concrete anticracking and freeze proof test result
| Pilot project | Cracking time (min) | Flaw area (mm2) | Freeze proof grade |
| Embodiment 1 | 265 | 168 | F200 |
| Embodiment 2 | 255 | 193 | F200 |
| Embodiment 3 | 276 | 157 | F200 |
| Embodiment 4 | 303 | 148 | F300 |
| Comparative example 1 | 134 | 310.8 | F100 |
| Comparative example 2 | 139 | 300.3 | F100 |
| Comparative example 3 | 245 | 220.6 | F50 |
| Comparative example 4 | 248 | 215.4 | F50 |
| Comparative example 5 | 240 | 230.6 | F150 |
| Blank example | 105 | 362.2 | F50 |
For relative contrast's example it can be seen from 4 result of table 3 and table and blank example, the swelling fiber of the embodiment of the present invention
Anti-crack water-proof agent can significantly improve the seepage-resistant grade of concrete and freeze proof grade, postponement cracking time simultaneously reduce flaw area,
Also improve to the intensity of concrete, especially flexural strength significantly improves, and from comparative example 1~5 as can be seen that changing
Any one raw material in treated basalt fiber or cracking resistance swelling agent or cellulose graft chitosan in waterproofing agent of the present invention
Its comprehensive performance will be made a significant impact, this is because these three raw materials of the invention have synergistic effect, addition is suitable
The these types of raw material of ratio can improve dispersibility of the anti-crack water-proof agent in concrete into concrete, pass through the modified Black Warrior
Rock fiber and cellulose graft chitosan react to each other with other active groups, make the close cementation of inside concrete, and limitation is mixed
Soil shrinkage cracking is coagulated, while can continue slowly to expand with appropriate amount swelling agent, compensating concrete is shunk, and is reached dual cracking resistance and is prevented
The function of water effectively compensates for hindering the development in crack due to the contraction generated during concrete hydrating.
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 (10)
1. a kind of swelling fiber anti-crack water-proof agent, which is characterized in that be made of the raw material of following mass percent: cracking resistance swelling agent
10%~30%, microballon powder 20%~40%, gangue 30%~45%, treated basalt fiber 0.5%~5%, cellulose
Graft shell is poly- 0.4%~2%, early strength agent 1%~2%, water-reducing agent 0.5%~1.0%, defoaming agent 0.1%~0.2%, above
The sum of mass percent of each raw material is 100%.
2. swelling fiber 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:
(S1) basalt fibre is cleaned with the dilute hydrochloric acid that HCl content is 10% first；
(S2) concentrated sulfuric acid and nitric acid mixed liquor that mass ratio is 40~50:1 are prepared, cooling in ice bath is placed in, works as mixed solution
When lower than 5 DEG C, the basalt fibre after cleaning is added, is stirred evenly, reacts 10min；
(S3) HNO is added to basalt fibre made from (S2)3Content is that the nitric hydrofluoric acid that 30wt% and HF content is 20% is mixed
Solution is closed, temperature is increased to 50 DEG C, insulation reaction 20min；
(S4) by basalt fibre obtained by (S3) is 5% with HF content and HCl content is 5% hydrofluoric acid hydrochloric acid mixed solution to production
Object carries out centrifuge washing, until pH value is close to 6；
(S5) basalt fibre obtained by (S4) is added in the mixed solution for the second alcohol and water that mass ratio is 5:5,1wt%N- is added
The coupling agent SEA-171 of (β-aminoethyl)-γ-aminopropyltriethoxy dimethoxysilane and 2wt%, in 50 DEG C of reaction 2h, then plus
Enter 5% acrylic acid -2- hydroxyl ethyl ester and 0.25% azodiisobutyronitrile and 0.5% double amber imide suberate sodium sulfonate
Salt is in 80 DEG C of reaction 1h；
(S6) dilute hydrochloric acid and water that the basalt fibre that (S5) is obtained is 5% with HCl content are cleaned by ultrasonic, until pH value
Close to 7, it is placed in drying in 60 DEG C of vacuum oven, obtains treated basalt fiber.
3. swelling fiber anti-crack water-proof agent according to claim 1, which is characterized in that the cellulose graft chitosan is
Acetylbutyrylcellulose grafted chitosan.
4. swelling fiber 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 mass percent be 2.5% sodium sulphate, 2.5% ammonium hydrogen sulfate and 95% calcium oxide expansion agents, together
It is put into ball mill ball milling 30min, cracking resistance swelling agent is made in 80 μm of square hole screens of rear mistake.
5. swelling fiber anti-crack water-proof agent according to claim 4, which is characterized in that the ratio of the calcium oxide expansion agents
Surface area is 150~400m2/ kg, wherein free calcium oxide (f-CaO) content is 20~85wt%.
6. swelling fiber anti-crack water-proof agent according to claim 1, which is characterized in that the microballon powder is flyash extraction
Object, bulk density >=700kg/m3, dioxide-containing silica >=50%, aluminum oxide content >=20%.
7. a kind of swelling fiber anti-crack water-proof agent according to claim 1, which is characterized in that Al in the gangue2O3Contain
Measure 18.3%~26.1wt%, Fe2O32.5%~8.5wt% of content.
8. according to claim 1 to 7 described in any item swelling fiber anti-crack water-proof agents, which is characterized in that the early strength agent is
One or more of sodium sulphate, aluminum aluminum sulfate, calcium nitrate, calcium formate and lithium nitrate.
9. according to claim 1 to 7 described in any item swelling fiber anti-crack water-proof agents, which is characterized in that the water-reducing agent is
Polycarboxylic acids dehydragent, glue sand water-reducing rate >=25%.
10. according to claim 1 to 7 described in any item swelling fiber anti-crack water-proof agents, which is characterized in that the defoaming agent is
Polyether Modified Polysiloxanes Defoaming Agent.
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| CN110845212B (en) * | 2019-11-23 | 2021-12-21 | 山东中建西部建设有限公司 | Seepage erosion resistant concrete and preparation method thereof |
| CN113354334A (en) * | 2021-06-09 | 2021-09-07 | 云南鼎工建筑材料制造有限公司 | Composite fiber anti-cracking agent |
| CN113636779A (en) * | 2021-07-02 | 2021-11-12 | 海南胜凯建材有限公司 | Self-curing high-expansion fiber anti-cracking agent and preparation method thereof |
| CN113816646A (en) * | 2021-09-22 | 2021-12-21 | 合肥市前沿表面活性物质科学研究有限公司 | Concrete mortar anti-cracking additive and preparation method thereof |
| CN113816646B (en) * | 2021-09-22 | 2022-12-27 | 合肥市前沿表面活性物质科学研究有限公司 | Concrete mortar anti-cracking additive and preparation method thereof |
| CN114477199A (en) * | 2022-03-17 | 2022-05-13 | 陕西科技大学 | Basalt nanosheet and preparation method thereof |
| CN116161927A (en) * | 2023-02-21 | 2023-05-26 | 武汉金中海高新科技有限公司 | Waterproof and impervious concrete material and preparation method thereof |
| CN116161927B (en) * | 2023-02-21 | 2023-11-24 | 武汉金中海高新科技有限公司 | Waterproof and impervious concrete material and preparation method thereof |
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