CN108911632A - A kind of concrete repairing material and preparation method thereof - Google Patents
A kind of concrete repairing material and preparation method thereof Download PDFInfo
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- CN108911632A CN108911632A CN201810882295.8A CN201810882295A CN108911632A CN 108911632 A CN108911632 A CN 108911632A CN 201810882295 A CN201810882295 A CN 201810882295A CN 108911632 A CN108911632 A CN 108911632A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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Abstract
The invention discloses a kind of concrete repairing materials and preparation method thereof, are related to technical field of concrete, solve existing concrete and are easy to produce crack, reduce the technical issues of structural strength.Concrete repairing material includes the component of following parts by weight：100-250 parts of common portland cement；100-250 parts of white portland cement；10-30 parts of rubber powder；0.5-1 parts of cellulose ether；0.2-0.4 parts of swelling agent；0.1-0.3 parts of anti-foaming agent.After each component in the present invention is used cooperatively, concrete is not likely to produce crack, improves the structural strength of concrete；It further includes 5-10 parts of modified fiber materials, fibrous material improves the compatibility with each component of concrete, fibrous material forms reticular structure in concrete by modified, fibrous material unanimously can generate crack by concrete, further increase the structural strength of concrete.
Description
Technical field
The present invention relates to technical field of concrete, more specifically, it relates to a kind of concrete repairing material and its preparation
Method.
Background technique
Solidifying soil prefabricated components are using concrete as the basic material building element made of factory, including beam, plate, column in advance
And construction and decoration accessory etc..The reinforcing and repairing of beams of concrete, column, plate and wall etc. requires patching material；Other normal concretes
It is difficult to the irregular dead angle being poured, corner and concrete porosity supplementary irrigation reparation etc. and is also required to patching material.This allows for repairing material
The demand of material greatly increases, while different use occasions also proposes different requirements to the performance of patching material.
Main component in concrete is calcium silicates (weak acid overbased salts), and hydration reaction occurs after meeting water, is formed free
Calcium, silicic acid and hydroxyl.When there is enough water in concrete, under the effect of capillary pressure, water can flow out, free at this time
The substances such as calcium, sodium, potassium can be flowed out by carrier of water.After reaching concrete surface, as moisture evaporates, these substances remain in mixed
Solidifying soil surface, forms white powder crystal, or react with Carbon Dioxide in Air and crystallize to form white in concrete surface
Lump.The substance of these whites is exactly the concrete accumulation of salt in the surface soil.The loss of calcium ion is caused along with loss hydroxy in concrete
Concrete alkalinity reduces, steel-bar corrosion when concrete pH value is lower than 12, in concrete；PH value is lower, coagulation
Speed of steel Corrosion is faster in soil, since the final corrosion product Fe2O33H2O of reinforcing bar volume for iron can expand
6.4 times or so, so that the concrete of surrounding produces stronger tensile stress, when tensile stress is more than the tension of concrete in concrete
When intensity, concrete will crack along reinforcing bar direction, after concrete cracking chloride ion more accessible to rebar surface, cause reinforcing bar into
The corrosion of one step.Concrete, since the influence material itself of moisture evaporation and aquation heating is easily shunk, is easy to produce in solidification
Crack further results in concrete structural strength reduction.It is, therefore, desirable to provide a kind of new scheme solves the above problems.
Summary of the invention
In view of the deficiencies of the prior art, the present invention intends to provide a kind of concrete repairing material, by adopting
It is used cooperatively with rubber powder, cellulose ether and swelling agent, to solve the above problems, having prevents concrete from generating crack, improving
The advantages of structural strength.
To achieve the above object, the present invention provides following technical solutions：
A kind of concrete repairing material, the component including following parts by weight：
100-250 parts of common portland cement；
100-250 parts of white portland cement；
10-30 parts of rubber powder；
0.5-1 parts of cellulose ether；
0.2-0.4 parts of swelling agent；
0.1-0.3 parts of anti-foaming agent.
By using above-mentioned technical proposal, color difference is adjusted in the cooperation of common portland cement and white portland cement,
Rubber powder plays the role of cementation, and cellulose ether, which plays, improves slurry workability, and swelling agent plays anti-shrink, prevents two secondary fissures
The effect of seam, anti-foaming agent is for eliminating the bubble generated in configuration process, and after above-mentioned each component is used cooperatively, concrete is not easy to produce
Raw crack, improves the structural strength of concrete.
Further preferably, the concrete repairing material further includes 5-10 parts of modified fiber materials.
By using above-mentioned technical proposal, fibrous material is improved compatible with each component of concrete by modified
Property, fibrous material forms reticular structure in concrete, fibrous material can consistent concrete generate crack, further increase mixed
Coagulate the structural strength of soil.
Further preferably, the modified fiber materials are any one in aramid fiber, polyester fiber, spandex fibre
Kind.
By using above-mentioned technical proposal, aramid fiber, polyester fiber, spandex fibre have superhigh intensity, high-modulus and
High temperature resistant, acid-fast alkali-proof, light-weight advantage are suitable for concrete.
Further preferably, the modification of the modified fiber materials includes the following steps：Modified fiber materials are existed
After being soaked for a period of time in lye, taking-up is cleaned up, dry.
By using above-mentioned technical proposal, after dipping by lye, surface is formed coarse fibrous material by slight erosion
Face further improves the compatibility of itself and each component of concrete.
Further preferably, the lye includes any one in sodium hydroxide, potassium hydroxide and tertiary sodium phosphate, described
The concentration of lye is 100~150g/L.
By using above-mentioned technical proposal, sodium hydroxide, potassium hydroxide, tertiary sodium phosphate are more stable in aqueous solution, are easy
It obtains and cheap, controls its concentration, rough surface can be formed in fiber surface when corroding fiber, it will not be because of corrosivity
It is too strong and make fibrous fracture, low-fiber intensity does not drop.
Further preferably, the concrete repairing material further includes 1-3 parts of alkaline microcapsules, the alkaline microcapsule packet
Core material and wall material are included, any one of the core material in sodium oxide molybdena, potassium oxide and calcium oxide, the wall material is to low alkalinity
The organic material of environment sensitive.
By using above-mentioned technical proposal, when armored concrete is carbonized, the pH value in concrete can be reduced, reinforcing bar
Surface passivated membrane is destroyed and easily corrodes.When pH value declines for some reason in concrete environment, wall material quilt
It triggers and surface generation structural defect, the water-soluble alkaline oxide in core material is dissolved in water and takes out of, can shape inside and outside core material
At dissolution equilibrium, the pH value of concrete environment can be directly promoted, and stable pH value over a period to come, delayed from the root mixed
The purpose of solidifying soil carbonization and reinforcement corrosion, prevents concrete from generating crack, further increases the structural strength of concrete.If straight
The addition water-soluble alkaline oxide in concrete is connect, cannot be present in concrete steadily in the long term because its is soluble easily in water.
Further preferably, the wall material is methylcellulose or ethyl cellulose.
By using above-mentioned technical proposal, methylcellulose or ethyl cellulose are easy film forming, and cyst wall has chemistry touching
(such as carbanion, chloride ion, sulfate ion, pH value) function is sent out, core material, which has, to be promoted and stabilizing concrete pH value
Function.
Further preferably, the diameter of the core material is 0.6-0.8 millimeters, and the diameter of the microcapsules is 1-1.2 millimeters.
By using above-mentioned technical proposal, wall material enables core material to protect, and realizes that microcapsules are directly mixed in whipping process
The construction technology entered avoids the influence constructed to core material.
Further preferably, the preparation of the alkaline microcapsule includes the following steps：
A. wall material is dissolved in ethyl alcohol, obtains wall material liquid；
B. core material is added in wall material liquid, stirs evenly, obtains microcapsules liquid；
C. microcapsules liquid is spray-dried using spray dryer, intake air temperature is 120 DEG C, air outlet temperature 60
DEG C, alkaline microcapsule is obtained after Temperature fall.
By using above-mentioned technical proposal, spray drying process can make the methylcellulose or ethyl cellulose of core surfaces
Rapid curing film forming, fully wrapped around core material avoid core material exposed.
The purpose of the present invention is to provide a kind of preparation methods of concrete repairing material, by using above-mentioned to solve
Problem has the advantage that.
To achieve the above object, the present invention provides following technical solutions：
A kind of preparation method of concrete repairing material, includes the following steps：
(1) it weighs common portland cement and white portland cement is uniformly mixed；
(2) rubber powder, cellulose ether, swelling agent, anti-foaming agent are weighed, is added in mixed cement, is uniformly mixed, mixed
Solidifying soil patching material.
When in use, stirring is mixed after 50-90 parts of water are added in every 400 parts of patching materials for concrete repairing material in the present invention
After closing uniformly, it can construct.
In conclusion compared with prior art, the invention has the advantages that：
(1) after each component in the present invention is used cooperatively, concrete is not likely to produce crack, improves the structural strength of concrete；
(2) by the way that modified fiber materials are added, fibrous material improves and each component of concrete by modified the present invention
Compatibility, fibrous material form reticular structure in concrete, and fibrous material unanimously can generate crack by concrete, further mention
The structural strength of high concrete；
(3) present invention is by being added alkaline microcapsule, and stable pH value, has delayed concrete carbonization from the root over a period to come
With the purpose of reinforcement corrosion, prevents concrete from generating crack, further increase the structural strength of concrete.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of alkaline microcapsule of the present invention；
Fig. 2 is the diagrammatic cross-section of concrete made of patching material of the invention.
Specific embodiment
With reference to the accompanying drawings and examples, the present invention will be described in detail.
Anti-foaming agent in following embodiment is dimethyl silicone polymer, and swelling agent is CSA swelling agent, by Nippon Electric Company, Ltd.
It provides, model：DENKA20#.Common portland cement is provided by Tongling, Anhui Province conch Cement Co., Ltd, model：
52.5 grades；
Embodiment 1：A kind of concrete repairing material comprising the component of following parts by weight：
100 parts of common portland cement；
250 parts of white portland cement；
10 parts of rubber powder；
1 part of cellulose ether；
0.2 part of swelling agent；
0.3 part of anti-foaming agent.
Preparation method includes the following steps：(1) it weighs common portland cement and white portland cement is stirred
Uniformly；
(2) rubber powder, cellulose ether, swelling agent, anti-foaming agent are weighed, is added in mixed cement, is uniformly mixed, mixed
Solidifying soil patching material.
Embodiment 2：A kind of concrete repairing material comprising the component of following parts by weight：
150 parts of common portland cement；
200 parts of white portland cement；
15 parts of rubber powder；
0.8 part of cellulose ether；
0.25 part of swelling agent；
0.25 part of anti-foaming agent.
Preparation method includes the following steps：(1) it weighs common portland cement and white portland cement is stirred
Uniformly；
(2) rubber powder, cellulose ether, swelling agent, anti-foaming agent are weighed, is added in mixed cement, is uniformly mixed, mixed
Solidifying soil patching material.
Embodiment 3：A kind of concrete repairing material comprising the component of following parts by weight：
180 parts of common portland cement；
170 parts of white portland cement；
20 parts of rubber powder；
0.7 part of cellulose ether；
0.2 part of swelling agent；
0.2 part of anti-foaming agent.
Preparation method includes the following steps：(1) it weighs common portland cement and white portland cement is stirred
Uniformly；
(2) rubber powder, cellulose ether, swelling agent, anti-foaming agent are weighed, is added in mixed cement, is uniformly mixed, mixed
Solidifying soil patching material.
Embodiment 4：A kind of concrete repairing material comprising the component of following parts by weight：
200 parts of common portland cement；
150 parts of white portland cement；
25 parts of rubber powder；
0.6 part of cellulose ether；
0.35 part of swelling agent；
0.15 part of anti-foaming agent.
Preparation method includes the following steps：(1) it weighs common portland cement and white portland cement is stirred
Uniformly；
(2) rubber powder, cellulose ether, swelling agent, anti-foaming agent are weighed, is added in mixed cement, is uniformly mixed, mixed
Solidifying soil patching material.
Embodiment 5：A kind of concrete repairing material comprising the component of following parts by weight：
250 parts of common portland cement；
100 parts of white portland cement；
30 parts of rubber powder；
0.5 part of cellulose ether；
0.4 part of swelling agent；
0.1 part of anti-foaming agent.
Preparation method includes the following steps：(1) it weighs common portland cement and white portland cement is stirred
Uniformly；
(2) rubber powder, cellulose ether, swelling agent, anti-foaming agent are weighed, is added in mixed cement, is uniformly mixed, mixed
Solidifying soil patching material.
Embodiment 6：A kind of concrete repairing material, difference from example 1 is that, concrete repairing material also wraps
Include 5 parts of modified fiber materials；Modified fiber materials are aramid fibers；The modification of modified fiber materials includes the following steps：
After modified fiber materials are soaked for a period of time in lye, taking-up is cleaned up, dry；Lye is sodium hydroxide solution, alkali
The concentration of liquid is 100g/L.
The preparation method of concrete repairing material includes the following steps：(1) common portland cement and white silicic acid are weighed
Salt cement is uniformly mixed；
(2) rubber powder, cellulose ether, swelling agent, anti-foaming agent are weighed, is added in mixed cement, adds modified fiber materials,
It is uniformly mixed, obtains concrete repairing material.
Embodiment 7：A kind of concrete repairing material, the difference is that, concrete repairing material also wraps with embodiment 6
Include 8 parts of modified fiber materials.
Embodiment 8：A kind of concrete repairing material, the difference is that, concrete repairing material also wraps with embodiment 6
Include 10 parts of modified fiber materials.
Embodiment 9：A kind of concrete repairing material, the difference is that, modified fiber materials are polyester with embodiment 6
Fiber.
Embodiment 10：A kind of concrete repairing material, the difference is that, modified fiber materials are ammonia with embodiment 6
Synthetic fibre fiber.
Embodiment 11：A kind of concrete repairing material, the difference is that, lye is that potassium hydroxide is molten with embodiment 6
Liquid.
Embodiment 12：A kind of concrete repairing material, the difference is that, lye is that tertiary sodium phosphate is molten with embodiment 6
Liquid.
Embodiment 13：A kind of concrete repairing material, the difference is that, the concentration of lye is 125g/ with embodiment 6
L。
Embodiment 14：A kind of concrete repairing material, the difference is that, the concentration of lye is 150g/ with embodiment 6
L。
Embodiment 15：A kind of concrete repairing material, the difference is that, concrete repairing material is also with embodiment 6
Including 1 part of alkaline microcapsule, alkaline microcapsule includes core material and wall material, and core material is sodium oxide molybdena, and wall material is quick to low alkalinity environment
The organic material of sense；The wall material of the present embodiment is methylcellulose.The diameter of core material is 0.6-0.8 millimeters, the diameter of microcapsules
It is 1-1.2 millimeters, size is within this range.
The preparation of alkaline microcapsule includes the following steps：
A. wall material is dissolved in ethyl alcohol, obtains wall material liquid；
B. core material is added in wall material liquid, stirs evenly, obtains microcapsules liquid；
C. microcapsules liquid is spray-dried using spray dryer, intake air temperature is 120 DEG C, air outlet temperature 60
DEG C, alkaline microcapsule is obtained after Temperature fall.
The preparation method of concrete repairing material includes the following steps：(1) common portland cement and white silicic acid are weighed
Salt cement is uniformly mixed；
(2) rubber powder, cellulose ether, swelling agent, anti-foaming agent are weighed, is added in mixed cement, adds modified fiber materials
And alkaline microcapsule, it is uniformly mixed, obtains concrete repairing material.
As shown in Figure 1, alkaline microcapsule 1 includes spherical wall material 11 and the core material 11 being wrapped in inside wall material 11, such as Fig. 2
Shown, alkaline microcapsule 1 is uniformly distributed in concrete 2.
Embodiment 16：A kind of concrete repairing material, the difference is that, concrete repairing material is also with embodiment 15
Including 2 parts of alkaline microcapsules.
Embodiment 17：A kind of concrete repairing material, the difference is that, concrete repairing material is also with embodiment 15
Including 3 parts of alkaline microcapsules.
Embodiment 18：A kind of concrete repairing material, the difference is that, core material is adopted in the present embodiment with embodiment 15
Use potassium oxide.
Embodiment 19：A kind of concrete repairing material, the difference is that, core material is adopted in the present embodiment with embodiment 15
Use calcium oxide.
Embodiment 20：A kind of concrete repairing material, the difference is that, wall material is in the present embodiment with embodiment 15
Ethyl cellulose.
Embodiment 21：A kind of concrete repairing material, difference from example 1 is that, concrete repairing material is also
Including 1 part of alkaline microcapsule, alkaline microcapsule includes core material and wall material, and core material is sodium oxide molybdena, and wall material is quick to low alkalinity environment
The organic material of sense；The wall material of the present embodiment is methylcellulose.The diameter of core material is 0.6-0.8 millimeters, the diameter of microcapsules
It is 1-1.2 millimeters, size is within this range.
The preparation of alkaline microcapsule includes the following steps：
A. wall material is dissolved in ethyl alcohol, obtains wall material liquid；
B. core material is added in wall material liquid, stirs evenly, obtains microcapsules liquid；
C. microcapsules liquid is spray-dried using spray dryer, intake air temperature is 120 DEG C, air outlet temperature 60
DEG C, alkaline microcapsule is obtained after Temperature fall.
The preparation method of concrete repairing material includes the following steps：(1) common portland cement and white silicic acid are weighed
Salt cement is uniformly mixed；
(2) rubber powder, cellulose ether, swelling agent, anti-foaming agent are weighed, is added in mixed cement, adds modified fiber materials
And alkaline microcapsule, it is uniformly mixed, obtains concrete repairing material.
Comparative example 1：The filling prepared using the embodiment 1 in the Chinese invention patent of Patent No. CN201710644644.8
Slurry is as patching material.
Test a performance test
Test method：According to JG/T 408-2013《Reinforcing bar sleeve for connection grouting material》Testing example 1, is implemented embodiment 6
The properties of example 15, embodiment 21 and comparative example 1.
Test result：The performance test results are as shown in table 1.As shown in Table 1, concrete repairing material produced by the present invention is each
Item index is met the requirements of the standard.
1 the performance test results of table
Test two strength tests
Test method:After 1-21 of the embodiment of the present invention and comparative example 1 are mixed with water, it is prepared into concrete block, in standard curing
Indoor maintenance is taken out after 28 days, tests the compression strength of its 28d.
Test result：The test result of embodiment 1-21 and comparative example 1 is as shown in table 2.As shown in Table 2, comparative example 1 is inadequate
Reach criterion of acceptability, and the compression strength of embodiment 1-5 is much higher than comparative example 1 and standard, the compression strength of embodiment 6-21
Much higher than embodiment 1, after illustrating that modified fiber materials are added in the present invention, the compatibility with each component of concrete is improved, it is fine
Dimension material forms reticular structure in concrete, further increases the structural strength of concrete.
The test result of table 2 embodiment 1-21 and comparative example 1
Test the test of three adhesion strengths
Test method：Using 100mm × 100mm × 200mm experiment mould, it is (commercially available normal that one end is put into old concrete sample
Advise Concrete Prefabricate Machine), 1 gained patching material pouring molding of embodiment 1-21 and comparative example is respectively adopted in the other end, from
So maintenance 28d forms a monolith concrete repair sample, and testing its flexural strength is linking new and old concrete intensity, as a result such as
Shown in table 3.
Test result：The adhesion strength test result of embodiment 1-21 and comparative example 1 is as shown in table 3.As shown in Table 3,
The concrete sample of embodiment 1-5 has reached 4.52MPa or more, the concrete of embodiment 6-20 in the adhesive strength of 28d
Sample has reached 5.52MPa or more in the adhesive strength of 28d, and comparative example 1 is only 1.25MPa, illustrates concrete of the invention
Patching material and conventional concrete material have excellent adhesion energy.
The adhesion strength test result of table 3 embodiment 1-21 and comparative example 1
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-described embodiment,
All technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
For those of ordinary skill, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of concrete repairing material, which is characterized in that the component including following parts by weight：
100-250 parts of common portland cement；
100-250 parts of white portland cement；
10-30 parts of rubber powder；
0.5-1 parts of cellulose ether；
0.2-0.4 parts of swelling agent；
0.1-0.3 parts of anti-foaming agent.
2. concrete repairing material according to claim 1, which is characterized in that the concrete repairing material further includes 5-
10 parts of modified fiber materials.
3. concrete repairing material according to claim 2, which is characterized in that it is fine that the modified fiber materials are selected from aramid fiber
Dimension, polyester fiber, any one in spandex fibre.
4. concrete repairing material according to claim 2, which is characterized in that the modification of the modified fiber materials
Include the following steps：After modified fiber materials are soaked for a period of time in lye, taking-up is cleaned up, dry.
5. concrete repairing material according to claim 4, which is characterized in that the lye includes sodium hydroxide, hydrogen-oxygen
Change any one in potassium and tertiary sodium phosphate, the concentration of the lye is 100~150g/L.
6. concrete repairing material according to claim 5, which is characterized in that the concrete repairing material further includes 1-
3 parts of alkaline microcapsules, the alkaline microcapsule include core material and wall material, and the core material is selected from sodium oxide molybdena, potassium oxide and calcium oxide
In any one, the wall material is the organic material to low alkalinity environment sensitive.
7. concrete repairing material according to claim 6, which is characterized in that the wall material is methylcellulose or ethyl
Cellulose.
8. concrete repairing material according to claim 6, which is characterized in that the diameter of the core material is 0.6-0.8 milli
Rice, the diameter of the microcapsules are 1-1.2 millimeters.
9. concrete repairing material according to claim 6, which is characterized in that the preparation of alkaline microcapsule includes following step
Suddenly：
A. wall material is dissolved in ethyl alcohol, obtains wall material liquid；
B. core material is added in wall material liquid, stirs evenly, obtains microcapsules liquid；
C. microcapsules liquid is spray-dried using spray dryer, intake air temperature is 120 DEG C, air outlet temperature 60
DEG C, alkaline microcapsule is obtained after Temperature fall.
10. a kind of preparation method of concrete repairing material, which is characterized in that include the following steps：
（1）It weighs common portland cement and white portland cement is uniformly mixed；
（2）Rubber powder, cellulose ether, swelling agent, anti-foaming agent are weighed, is added in mixed cement, is uniformly mixed, mixed
Solidifying soil patching material.
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| CN110698108A (en) * | 2019-12-02 | 2020-01-17 | 马鞍山十七冶工程科技有限责任公司 | Concrete self-repairing capsule and preparation method and application thereof |
| CN111574150A (en) * | 2020-05-15 | 2020-08-25 | 西安中铁工程装备有限公司 | Cement-based polymer cementing material for duct piece repair and duct piece repair method |
| CN115716732B (en) * | 2022-10-28 | 2024-04-26 | 上海中南建筑材料有限公司 | Inorganic dynamic cracking-resistant repair coating and preparation method thereof |
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