CN102765915B - Resin emulsion mortar resistant to seepage, cracking and sulfate corrosion - Google Patents
Resin emulsion mortar resistant to seepage, cracking and sulfate corrosion Download PDFInfo
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Abstract
The invention provides a resin emulsion mortar resistant to seepage, cracking and sulfate corrosion, which comprises 28-43 parts of ordinary silicate cement, 41-62 parts of sand, 6-11 parts of high polymer resin emulsion and 3-8 parts of water. The resin emulsion mortar has characteristics as follows: the compression strength is 45-60MPa, the rupture strength is 10.0-15.0MPa, the tensile strength is 3.5-5.0MPa, the cohesive strength is 3.0-4.5MPa, the ultimate tensile value is larger than 400*10<-6>, the dry shrinkage deformation of 57 days is less than 150*10<-6>, the water absorption of one day is less than 1%, and the frost-resistance grade is higher than F300. The resin emulsion mortar is resistant to various corrosions and has the main characteristics of high cohesive strength, high seepage resistance, large ultimate tensile value, high cracking resistance, high durability and good corrosion resistance.
Description
technical field
The present invention relates to a kind of engineering materials, be specifically related to a kind of engineering protection mortar with high bond strength, high antiseepage, cracking resistance, freeze-thaw-, chloride-penetration resistance, anti-sulphates corrosive, anti-carbonization, ageing-resistant and high-durability.Be mainly used in the building fields such as water conservancy, traffic, electric power, metallurgy, chemical industry, in the protection against corrosion of the skeleton construction in the severe environment such as ocean environment and saltings environment, show excellent performance, can solve in repairing work because of the inconsistent obscission causing of New-old concrete linear expansivity, solve because of the general excessive problem of Cracking causing of resin slurry drying shrinkage.
background technology
At present, because concrete carbonization, the steel bar corrosion that causes from ocean environment, deicer salts chloride contamination or microfracture etc. destroy, in the environment of saltings, sulphate attack concrete causes concrete structure cracking to concrete steel building, thereby makes works lose gradually that its function, work-ing life shorten, maintenance cost improves.
Two-pack solvent epoxy varnish mortar has following deficiency: 1) organic solvent volatile matter (VOC) is unfavorable for environment protection; 2) need the accurate proportioning of two-pack and stir; 3) epoxy resin viscosity is large; stir difficulty with cement, sand; constructional difficulties; cost is high; 4) do not bring into play the effect that hydrated cementitious forms silicate crystal; cement and sand only play the effect of stopping composition; so can not be called epoxy resin mortar in fact; 5) cure shrinkage of epoxy resin mortar is large, along with the prolongation of time, can throw off gradually with base concrete.Therefore epoxy resin mortar is replaced gradually.
With solvent type resin mortar ratio, the advantage of resin emulsion mortar is: 1) water is solvent, environmental friendliness; 2) cement generation hydration reaction, forms organic-inorganic hybrid network with high molecular polymer, and over-all properties is more excellent; 3) the little and single-component of resin emulsion viscosity, identical with the blending craft of conventional cement mortar, and easy construction is simple to operate; 4) can, by the modification of resin emulsion, obtain the resin emulsion mortar approaching with substrate coefficient of linear expansion.
The application of resin emulsion on coating for internal and external wall and waterproof paint is very extensive, but there are many restrictions for mortar, as aquation can occur cement under the existence of water, condense, resin emulsion for coating is not necessarily applicable to prepare mortar, domestic cement type is many, same emulsion is also different to the adaptability of cement, and rapid hardening or not solidifying situation may occur.So the research for coating resin emulsion can not have substantial directive function to resin emulsion mortar, resin emulsion must real be joined mortar could determine whether resin emulsion is applicable to.
Reported resin emulsion mortar exists with base concrete coefficient of linear expansion inconsistent, the phenomenon that can shell, the shortcoming of long durability deficiency.Domestic disclosed resin emulsion mortar patent, through consulting analysis, the problem emphasis of solution is all different from the application.The application's emphasis solves the problem of impervious, the cracking resistance of resin slurry, anti-carbonization, freeze-thaw-, chloride-penetration resistance and resisting erosion of sulfate.
Summary of the invention
For the deficiency of the building field Steel Concrete safeguard procedures such as Civil Engineering, traffic, electric power and means, the object of this invention is to provide a kind of engineering mortar with high bond strength, high antiseepage, high-durability energy.Be mainly used in the concrete steel building in the fields such as water conservancy, traffic, electric power, can prevent the cracking causing because of steel bar corrosion and concrete shrinkage, improve buildings antiseepage, anti-carbonization, freeze-thaw-, resisting chloride ion penetration and sulphate-corrosion resistance energy, extend service life and the weather resistance of buildings.
The scheme that completes foregoing invention task is, a kind of resin emulsion mortar of seepage control and crack resistance anti-sulphates corrosive, and the mass parts of its each component consists of: ordinary Portland cement: 28 parts-43 parts; Sand: 41 parts-62 parts; Macromolecule resin emulsion: 6 parts-11 parts; Water: 3 parts-8 parts.
The mass parts that each component that the present invention recommends is optimized is: ordinary Portland cement: 30 parts-35 parts; Sand: 51 parts-60 parts; Macromolecule resin emulsion: 6 parts-9 parts; Water: 4 parts-7 parts.
The more best ratio of each component that the present invention recommends is: ordinary Portland cement 30 mass parts, dry sand 58 mass parts, resin emulsion 7 mass parts, water 5 mass parts; Or, ordinary Portland cement 34 mass parts, dry sand 52 mass parts, resin emulsion 9 mass parts, water 5 mass parts.
Ordinary Portland cement wherein adopts 42.5 grades, and sand adopts fineness modulus at 2.3 ~ 3.0 medium sand, and water is tap water, and cement, sand, water quality all should meet current national codes requirement; Resin emulsion meets product technology and requires (outward appearance: oyster white is without precipitation homogeneous latex emulsion, solid content: 39 ~ 41%, pH value: 3 ~ 6, stability in storage: 5 ~ 40 ℃, three months without obvious sediment).
Wherein said macromolecule resin emulsion can be that one or more in following material are compound: modification alkyl acrylic resin emulsion, Emulsion styrene-acrylic resin, epoxy acrylic resin emulsion, silicone modified acrylic resin emulsion, butadiene-styrene emulsion, vinylchlorid-divinyl emulsion, ethene-vinyl acetate emulsion, epoxy resin latex.The feature of emulsion is single component, and self-crosslinking solidifies, and has different coefficient of linear expansion resin emulsion is screened according to different resins, and the ratio adjustment by hardened resin emulsion and soft resin emulsion etc. obtains the resin emulsion approaching with old concrete coefficient of linear expansion.
Hardened resin emulsion can be that one or more of following material are compound: epoxy resin latex, epoxy acrylic resin emulsion, Emulsion styrene-acrylic resin, short alkyl acrylic resin emulsion.Preferred epoxy emulsion or epoxy acrylic resin emulsion.More preferably select epoxy acrylic resin emulsion
Soft resin emulsion can be that one or more of following material are compound: ethene-vinyl acetate emulsion, butadiene-styrene emulsion, vinylchlorid-divinyl emulsion, silicone modified acrylic resin emulsion, long alkyl acrylic resin emulsion.Preferred long alkyl acrylic resin emulsion or butadiene styrene resin emulsion.More preferably select long alkyl acrylic resin emulsion.
The composite modified ratio of hardened resin emulsion and soft resin emulsion can be selected in 5:1-1:5 scope.Preferred proportion is 3:1-1:3.More ratio of greater inequality example is 1:2.2.
Further restriction of the present invention, the resin emulsion mortar of described seepage control and crack resistance anti-sulphates corrosive refers to, the mortar obtaining by following preparation method: take cement, sand in certain ratio, first in stirred vessel, stir, make siccative mortar, then macromolecule resin emulsion, water are weighed according to a certain percentage, put into agitator kettle and stir 3min together with siccative mortar, make fresh mortar.
Described siccative mortar is comprised of cement, dry sand, and the mass ratio of the two is, 33-50:50-69.
By adjusting the mass ratio of each component in starting material, can produce the mortar that has bonding and folding strength, high antiseepage, high cracking resistance, high-durability, prevents blending Corrosion Protection, this mortar has the following performance index:
The performance index of table 1 resin emulsion mortar
| project | performance |
| mortar ultimate compression strength | 45MPa ~ 60MPa |
| folding strength | 10.0MPa ~ 15.0MPa |
| tensile strength | 3.5MPa ~ 5.0MPa |
| cohesive strength | 3.0MPa ~ 4.5MPa |
| limit stretch value | be greater than 400 * 10 -6 |
| 57d is dry-shrinkage deformed | be less than 150 * 10 -6 |
| 1 day water-intake rate | be less than 1% |
| freezing and thawing performance | be greater than F300 |
| anti-permeability performance | be greater than 1.5 MPa |
| chloride diffusion coefficient | be less than 2.5 * 10-12(m 2/ s) |
| anti-sulphates corrosive | anti-corrosion COEFFICIENT K fbe greater than 130% |
| anti-carbonization ability | 28d carbonation depth is less than 2mm |
| corrosion resistance nature | resistance to≤5% hydrochloric acid, nitric acid, hydrofluoric acid, resistance to≤10% acetic acid, resistance to sodium carbonate, urea, ammoniacal liquor, ammonium chloride, ammonium nitrate, sodium sulfate saturated solution, corrode under resistance to acetone, ethanol, gasoline and benzene chemical mediator environment. |
Resin emulsion mortar is on sand-cement slurry basis, to add macromolecule resin emulsion, thus structurally-modified to sand-cement slurry, in macroscopic view, showing as mortar bonding strength and density increases, and weather resistance improves.Substantially solved and the inconsistent problem that comes off causing of base concrete polar expansion, there is easy construction, simple to operate, can carry out large-area construction.
Associative list 1 result, the present invention's " resin emulsion mortar of seepage control and crack resistance sulfuric-resisting corrosion " compares with ordinary mortar, has following special advantage:
1, high-adhesion energy
The cohesive strength of conventional cement mortar is generally in 1MPa left and right, and the cohesive strength of resin emulsion sand-cement slurry is greater than 3MPa, greatly improves the adhesive property of facing material.
2, compared with low elastic modulus, large limit stretch value, high cracking resistance energy
Its Young's modulus of ordinary mortar is generally at 20.0GPa ~ 25.0GPa, and limit stretch value is less than 150 * 10
-6, resin emulsion sand-cement slurry Young's modulus is less than 17.0GPa, and limit stretch value is greater than 400 * 10
-6, dry-shrinkage deformed have good elastoplasticity and non-deformability lower than 1/5 of general energy mortar, significantly improved the splitting resistance of mortar.
3, high-durability
The frost resistance of ordinary mortar and impermeability are generally poor, freeze proof grade is generally F50, more than the freeze proof grade of resin emulsion sand-cement slurry reaches F300, at 1.5MPa hydraulic pressure, under 24 hours conditions of constant voltage, infiltration is highly only 1/5 ~ 1/7 of ordinary mortar, carbonation depth is only 1/10 of ordinary mortar, can significantly improve the endurance quality of mortar.
4, high-corrosion resistance
The Anti-Chloride Ion Penetration of ordinary mortar and resistance to various chemical mediator poor-performing, resin emulsion sand-cement slurry chlorion is diffused as below 20% of ordinary mortar, ability≤5% hydrochloric acid, nitric acid, hydrofluoric acid, resistance to≤10% acetic acid, resistance to sodium carbonate, urea, ammoniacal liquor, ammonium chloride, ammonium nitrate, sodium sulfate saturated solution, the corrosion under resistance to acetone, ethanol, gasoline and benzene chemical mediator environment.
5, protection of the environment
Macromolecule resin emulsion is oil-in-water structure, and medium is water, and environment is not formed to infringement, and operator's health is not formed to harm, meets that reply extreme climate in the whole world changes and the development trend of greatly developing environmentally friendly product.
6, construction operability and security
Construction cost is low, and construction technology is simple, and available traditional technology construction is safe, without heavy mechanical equipment.The construction and maintenance phase is relatively short.After traditional mortar construction, conventionally want more than moist maintenance 14d, macromolecule resin emulsion mortar only needs naturally to do and support after moist maintenance 7d.
Embodiment
The resin emulsion mortar implementation method that seepage control and crack resistance is durable is as follows:
Embodiment 1, the resin emulsion mortar of seepage control and crack resistance anti-sulphates corrosive,
1, ordinary Portland cement, dry sand, macromolecule resin emulsion, water is better than weighing by certain quality, wherein, ordinary Portland cement 30 mass parts, dry sand 58 mass parts, resin emulsion 7 mass parts, water 5 mass parts.
2, load weighted cement, dry sand are first put into agitator kettle dry mixing even, then added emulsion and water, continuously stirring 3min.
The compound viscosity of 3, mixing and stirring is larger, can be used for the construction of wiping one's face of engineering site facade or bottom surface.Being suitable for the fields such as water conservancy, traffic, metallurgical ,Gong China Democratic National Construction Association has under antiseepage, anti-chlorine salt corrosion requirement environment and uses.
Embodiment 2,
1, ordinary Portland cement, dry sand, resin emulsion, water is better than weighing by certain quality, wherein, ordinary Portland cement 28 mass parts, dry sand 62 mass parts, resin emulsion 6 mass parts, water 5 mass parts.
2, alr mode is with embodiment 1.
3, the compound mixing and stirring can be used for the construction of wiping one's face of engineering site end face.Being suitable for the fields such as water conservancy, traffic, metallurgical ,Gong China Democratic National Construction Association has under antiseepage, anti-chlorine salt corrosion requirement environment and uses.
Embodiment 3,
1, ordinary Portland cement, dry sand, resin emulsion, water is better than weighing by certain quality, wherein, ordinary Portland cement 43 mass parts, dry sand 41 mass parts, resin emulsion 11 mass parts, water 3 mass parts.
2, alr mode is with embodiment 1.
3, the compound mixing and stirring can be used for the engineering site construction of wiping one's face.The corrosion-resistant requirement that is suitable for chemical field used under environment.
Embodiment 4, basic identical with above-described embodiment, but wherein the mass parts of each component is: ordinary Portland cement: 30 parts; Sand: 60 parts; Macromolecule resin emulsion: 6 parts; Water: 8 parts.
Embodiment 5, basic identical with above-described embodiment, but wherein the mass parts of each component is: ordinary Portland cement: 30 parts; Sand: 60 parts; Macromolecule resin emulsion: 6 parts; Water: 4 parts.
Embodiment 6, basic identical with above-described embodiment, but wherein the mass parts of each component is: ordinary Portland cement: 28 parts; 62 parts, sand; Macromolecule resin emulsion: 7 parts; Water: 3 parts.
Embodiment 7, basic identical with above-described embodiment, but wherein the mass parts of each component is: ordinary Portland cement: 35 parts; Sand: 51 parts; 9 parts of macromolecule resin emulsions; Water: 7 parts.
Embodiment 8, basic identical with above-described embodiment, but wherein the mass parts of each component is: ordinary Portland cement: 34 parts; Sand: 52 parts; Macromolecule resin emulsion: 9 parts; Water: 5 parts.
Embodiment 9, basic identical with above-described embodiment, but wherein the mass parts of each component is: ordinary Portland cement: 34 parts; Sand: 52 parts; Macromolecule resin emulsion: 7 parts; Water: 7 parts.
Embodiment 10, basic identical with above-described embodiment, but wherein the mass parts of each component is: ordinary Portland cement: 38 parts; Sand: 46 parts; Macromolecule resin emulsion: 10 parts; Water: 6 parts.
Embodiment 11, basic identical with above-described embodiment, but wherein the mass parts of each component is: ordinary Portland cement: 39 parts; Sand: 47 parts; Macromolecule resin emulsion: 8 parts; Water: 6 parts.
Embodiment 12, basic identical with above-described embodiment, but in described siccative mortar, and the mass ratio that cement and dry sand form is, 41:59.
Embodiment 13, basic identical with above-described embodiment, but in described siccative mortar, and the mass ratio that cement and dry sand form is, 36:64.
Embodiment 14, basic identical with above-described embodiment, but in described siccative mortar, and the mass ratio that cement and dry sand form is, 34:66.
Embodiment 15, basic identical with above-described embodiment, but in described siccative mortar, and the mass ratio that cement and dry sand form is, 45:55.
Embodiment 16: basic identical with above-described embodiment, but in described siccative mortar, described macromolecule resin emulsion is that one or more in following material are compound: modification alkyl acrylic resin emulsion, Emulsion styrene-acrylic resin, epoxy acrylic resin emulsion, silicone modified acrylic resin emulsion, butadiene-styrene emulsion, vinylchlorid-divinyl emulsion, ethene-vinyl acetate emulsion, or epoxy resin latex;
Described soft resin emulsion is that one or more of following material are compound: ethene-vinyl acetate emulsion, butadiene-styrene emulsion, vinylchlorid-divinyl emulsion, silicone modified acrylic resin emulsion, or long alkyl acrylic resin emulsion.
Claims (7)
1. a resin emulsion mortar for seepage control and crack resistance anti-sulphates corrosive, the mass parts of its each component consists of: silicate cement: 28 parts-43 parts; Sand: 41 parts-62 parts; Macromolecule resin emulsion: 6 parts-11 parts; Water: 3 parts-8 parts;
Described macromolecule resin emulsion is to adjust in proportion by hardened resin emulsion and soft resin emulsion, the macromolecule resin emulsion obtaining;
The ratio of described hardened resin emulsion and soft resin emulsion is selected in 5:1-1:5 scope;
Described hardened resin emulsion is following material, and one or more are compound: epoxy resin latex, epoxy acrylic resin emulsion, Emulsion styrene-acrylic resin, or short alkyl acrylic resin emulsion;
Described soft resin emulsion is following material, and one or more are compound: long alkyl acrylic resin emulsion or butadiene styrene resin emulsion.
2. the resin emulsion mortar of seepage control and crack resistance anti-sulphates corrosive according to claim 1, is characterized in that, the mass parts of described each component is: silicate cement: 30 parts-35 parts; Sand: 51 parts-60 parts; Macromolecule resin emulsion: 6 parts-9 parts; Water: 4 parts-7 parts.
3. the resin emulsion mortar of seepage control and crack resistance anti-sulphates corrosive according to claim 1, is characterized in that, the mass parts of described each component is: silicate cement 30 mass parts, dry sand 58 mass parts, resin emulsion 7 mass parts, water 5 mass parts; Or, silicate cement 34 mass parts, sand 52 mass parts, macromolecule resin emulsion 9 mass parts, water 5 mass parts.
4. according to the resin emulsion mortar of the seepage control and crack resistance anti-sulphates corrosive one of claim 1-3 Suo Shu, it is characterized in that, described hardened resin emulsion adopts epoxy resin latex or epoxy acrylic resin emulsion; Described soft resin emulsion adopts long alkyl acrylic resin emulsion or butadiene styrene resin emulsion.
5. the resin emulsion mortar of seepage control and crack resistance anti-sulphates corrosive according to claim 4, is characterized in that, described hardened resin emulsion adopts epoxy acrylic resin emulsion; Described soft resin emulsion adopts long alkyl acrylic resin emulsion.
6. the resin emulsion mortar of seepage control and crack resistance anti-sulphates corrosive according to claim 5, is characterized in that, the composite modified ratio of described hardened resin emulsion and soft resin emulsion is 3:1-1:3.
7. the resin emulsion mortar of seepage control and crack resistance anti-sulphates corrosive according to claim 6, is characterized in that, the composite modified ratio of described hardened resin emulsion and soft resin emulsion is 1:2.2;
The resin emulsion mortar of described seepage control and crack resistance anti-sulphates corrosive refers to, the mortar obtaining by following preparation method: take cement, sand in certain ratio, first in agitator kettle, stir, make siccative mortar, then macromolecule resin emulsion, water are weighed according to a certain percentage, put into agitator kettle and stir 3min with together with described siccative mortar, make fresh mortar.
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| CN103773149A (en) * | 2014-01-20 | 2014-05-07 | 南通耀华机电有限公司 | Anticorrosive coating on inner wall of tubular part |
| CN105347761A (en) * | 2015-10-26 | 2016-02-24 | 中国建筑材料科学研究总院 | Rapid anti-corrosion repair mortar, preparation method and application thereof |
| CN105801048B (en) * | 2016-02-23 | 2018-05-25 | 合肥市再德高分子材料有限公司 | A kind of airport runway surface reparation injecting paste material |
| CN106542755B (en) * | 2016-10-24 | 2019-01-22 | 盐城申兴实业有限公司 | Clinker light particle wraps up in shell baking-free ceramicite and preparation method thereof |
| CN106746865A (en) * | 2016-12-15 | 2017-05-31 | 大连海事大学 | The concrete and its construction method of a kind of sulfate resistance physical erosion |
| CN107640941B (en) * | 2017-10-16 | 2020-09-25 | 长江水利委员会长江科学院 | Acrylic emulsion toughened plastic concrete with good deformation adaptability and preparation method thereof |
| CN108640551B (en) * | 2018-04-25 | 2020-12-29 | 同济大学 | Coral reef sand reinforcing material and using method thereof |
| CN110002814B (en) * | 2019-02-22 | 2021-12-07 | 上海贝恒人居建设集团有限公司 | Modified high-elasticity waterproof film coating and preparation method thereof |
| CN109942270A (en) * | 2019-04-23 | 2019-06-28 | 北京工业大学 | A kind of ocean engineering polymer mending mortar |
| CN111423172A (en) * | 2020-05-14 | 2020-07-17 | 辽宁省交通高等专科学校 | Sulfate physical erosion resistant concrete and construction method thereof |
| CN112375411A (en) * | 2020-10-30 | 2021-02-19 | 中科院广州化灌工程有限公司 | Epoxy modified polymer cement anticorrosive paint and preparation method and application thereof |
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| CN101638308A (en) * | 2009-06-09 | 2010-02-03 | 朱奎 | Antibiosis mortar and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101638308A (en) * | 2009-06-09 | 2010-02-03 | 朱奎 | Antibiosis mortar and preparation method thereof |
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