CN104788062A - Waterborne polyurethane polymer modified concrete for bridge deck slab and preparation method - Google Patents
Waterborne polyurethane polymer modified concrete for bridge deck slab and preparation method Download PDFInfo
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- CN104788062A CN104788062A CN201510193950.5A CN201510193950A CN104788062A CN 104788062 A CN104788062 A CN 104788062A CN 201510193950 A CN201510193950 A CN 201510193950A CN 104788062 A CN104788062 A CN 104788062A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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Abstract
The invention relates to waterborne polyurethane polymer modified concrete for a bridge deck slab and a preparation method. The waterborne polyurethane polymer modified concrete comprises the following components: ordinary silicate cement, pebbles, medium sand, coal ash, silicon ash, a naphthalene water reducer, waterborne polyurethane emulsion and water. The preparation method comprises the following steps: putting the dried pebbles, the ordinary silicate cement, the medium sand, the coal ash and the silicon ash into a stirring machine at a normal temperature, and stirring; adding the waterborne polyurethane emulsion, and stirring; adding the water, and stirring; finally, adding the naphthalene water reducer, and stirring. The invention provides the waterborne polyurethane polymer modified concrete for problems that an ordinary concrete bridge deck slab is likely to suffer from corrosion damage and low in strength. The polymer modified concrete can effectively solve the problem of high possibility of causing corrosion damage of the bridge deck slab in a complicated environment and greatly reduce the repair expense in an operation process. The polymer modified concrete can be applied to a bridge surface structure which is relatively high in durability requirement or is relatively difficult to repair and relatively large in span.
Description
Technical field
What the present invention relates to is a kind of material of construction, particularly a kind of for decking water-based polyurethane polymer modified concrete.The present invention also relates to a kind of preparation method of decking water-based polyurethane polymer modified concrete
Background technology
Decking are important component parts for bridge structure, and the weather resistance of decking directly affects the weather resistance of bridge structure.Meanwhile, along with improving constantly of bridge span, alleviate dead load, what also become is very necessary.Therefore the selection of decking material is very important.Normal concrete decking often because of Chloride Attack, freezing and carbonization and damaged.Although these damages are shallow surface at first, As time goes on, they can extend to endothecium structure material, cause reinforcement corrosion, threaten the life-span of bridge.The intensity of normal concrete is lower simultaneously, and when bridge span is larger time, can increase the deadweight of structure, be disadvantageous to the general safety performance of structure.Therefore require that people develop weather resistance longer, the decking material that intensity is higher.The polymer modification concrete of this interpolation aqueous polyurethane, has wear-resistant, high-strength, durable, the advantage of chloride-penetration resistance, thus prevent concrete freeze-thaw damage and steel bar corrosion from destroying, the life-span of structure is extended, thus obtains better economic benefit.
Have many about the concrete research of decking polymer modification at present both at home and abroad, and have the bibliographical information for this technical study and analysis: " performance of polymer modified cement-concrete and the applied research in paving steel bridge deck thereof " (master thesis. Southeast China University, 2008,1+9), polymer modification concrete used adds epoxy resin latex and is prepared from, the ultimate compression strength that this kind of polymer modification concrete experiments draws and bending strength relatively low." polymer emulsion modified Application Research on Concrete " (northern traffic, 2006,12:36-39), the polymer modification concrete mentioned, utilizes Carboxy emulsion to carry out modification.Experiment adopts employing 42.5 grades of silicate cements, adopts fineness modulus to be the coarse sand of 3.2, and adopt the artificial rolling granite stones of continuous grading, maximum particle diameter is 30mm; The Carboxy emulsion that polymer emulsion adopts Shanghai Gaoqiao BASF AG to produce, solids content is 47%, selection of auxiliary organic silicone oil and tributyl phosphate defoamer.Publication number is " a kind of polymer cement concrete lamella " disclosed in the patent document of CN101725103A, and the proportioning of employing is: cement, polymkeric substance, antiskid aggregate, filler, auxiliary agent, pigment, water are in mass ratio: 5 ~ 40:10 ~ 20:25 ~ 30:5 ~ 15:0 ~ 2:0 ~ 3:20 ~ 25.Wherein cement can be ordinary Portland cement or aluminosulfate cement; Polymkeric substance is that one or more of the emulsions such as benzene emulsion, methyl methacrylate, ethyl propenoate are blended; Filler is flyash, building sand, rubber powder or talcum powder one or more mix.This kind of polymer cement concrete is mainly applicable to bituminous concrete pavement, the preventive maintenance of cement concrete pavement and functional betterment works, and water-based polyurethane polymer modified concrete of the present invention is mainly applicable to large span, life requirement is higher or repair more difficult bridge deck structure.
Summary of the invention
The object of the present invention is to provide and a kind ofly effectively can solve the problem that decking are easily corroded destruction under complex environment, greatly reduce the decking water-based polyurethane polymer modified concrete of the rehabilitation expense of decking in operation process.The present invention also aims to the preparation method that a kind of decking water-based polyurethane polymer modified concrete is provided.
Decking water-based polyurethane polymer modified concrete of the present invention is made up of ordinary Portland cement, stone, medium sand, flyash, silicon ash, naphthalene water reducer, aqueous polyurethane emulsion and water, and each components by weight is followed successively by: 16.8% ~ 18.9%, 29.8% ~ 31%, 36% ~ 39.8%, 2.7% ~ 3.0%, 1.5% ~ 1.8%, 0.2% ~ 0.25%, 5.4% ~ 7.2%, 2% ~ 3.65%.
The water reducer of described naphthalene water reducer to be β-naphthalene sulfonic acidformaldehyde condensation product be main component.
Described aqueous polyurethane emulsion to be solid content be 35% aqueous polyurethane.
The maximum particle diameter of described stone is no more than 20mm.
The preparation method of decking water-based polyurethane polymer modified concrete of the present invention is:
Component comprises ordinary Portland cement, stone, medium sand, flyash, silicon ash, naphthalene water reducer, aqueous polyurethane emulsion and water, and each components by weight is followed successively by: 16.8% ~ 18.9%, 29.8% ~ 31%, 36% ~ 39.8%, 2.7% ~ 3.0%, 1.5% ~ 1.8%, 0.2% ~ 0.25%, 5.4% ~ 7.2%, 2% ~ 3.65%;
At normal temperatures the stone of drying and ordinary Portland cement, medium sand, flyash, silicon ash are put in stirrer, stir 2min, add aqueous polyurethane emulsion subsequently, stir 3min again, then add water, stir 2min, finally add naphthalene water reducer, stir 2min.
The present invention is directed to normal concrete decking and be easily corroded destruction, the problem that intensity is low, provide a kind of polymer modification concrete adding aqueous polyurethane.This polymer-modified concrete can solve the problem that decking are easily corroded destruction under complex environment effectively, greatly reduces the rehabilitation expense in operation process.
Decking water-based polyurethane polymer modified concrete of the present invention, can be used in life requirement higher, or repairs more difficult, in the bridge deck structure that span is larger.Water-based polyurethane polymer modified concrete provided by the invention, has following major advantage compared with traditional cement concrete:
The first, intensity is high.Waterborne polyurethane film is formed at slurry with on the interface gathered materials, and can strengthen the cohesive force of gathering materials and between slurry.Simultaneously due to film relative intensity and tension toughness higher.Therefore greatly can improve the concrete resistance to compression of polymer modification, bending resistance, tensile strength, alleviate the thickness of decking, alleviate dead load, thus reach the object increasing structural span.Its compressive strength is 68 ~ 75MPa, and flexural strength is 14 ~ 16MPa, and tensile strength is 8 ~ 10MPa.
The second, good endurance.Pore due to the film of aqueous polyurethane formation can stop absorption and the infiltration of water, thus can effectively prevent entering of corrosive medium; Secondly the raising of crack resistance decreases the formation of tiny crack grid, prevents the transmission of moisture; The silicon ash finally added makes to produce high PH medium in concrete has provide protection to reinforced steel bar rust preventing erosion.
Three, the post-consumer polymer modified concrete that hardens has excellent impervious and anti-freezing property.
Four, preparation technology is simple, easy construction, wear resistance and shock resistance excellent.
Five, the flyash added and silicon ash belong to industrial waste, and aqueous polyurethane has and do not pollute in addition, the features such as transportation safety.Therefore material is made to have the feature of energy-conserving and environment-protective.
Six, water-based polyurethane polymer modified concrete and cement concrete or mortar, stone material, metal, timber etc. have good cohesive force.
Seven, use extensively: this material is mainly used in large span, life requirement is higher or repair more difficult bridge deck structure.Marine structure can also be widely used in addition, motorway, tunnel, the concrete workses such as harbour.
Embodiment
Illustrate below and the present invention is described in more detail.
Embodiment 1:52.5 ordinary Portland cement, maximum particle diameter be no more than the coarse aggregate of 20mm, medium sand, flyash, silicon ash, take β-naphthalene sulfonic acidformaldehyde condensation product as the concrete high efficiency water reducing agent of main component, solid content be 35% aqueous polyurethane and this several raw material of water, be followed successively by according to weight proportion: 16.8%, 29.8%, 39.8%, 2.7%, 1.5%, 0.2%, 7.2%, 2%.
At normal temperatures, the aggregate of drying and filler are put in forced mixer, stir 2min.Add aqueous polyurethane emulsion subsequently, then stir 3min.Then add water, stir 2min.Finally add naphthalene series high-efficiency water-reducing agent.Finally add naphthalene series high-efficiency water-reducing agent, stir 2min, make mixture reach uniform state, can construct.
Embodiment 2:52.5 ordinary Portland cement, maximum particle diameter is no more than the coarse aggregate of 20mm, medium sand, flyash, silicon ash, be the concrete high efficiency water reducing agent of main component with β-naphthalene sulfonic acidformaldehyde condensation product, solid content is aqueous polyurethane and this several raw material of water of 35%, is followed successively by: 18.9%, 31%, 36%, 3%, 1.8%, 0.25%, 5.4%, 3.65% according to weight proportion.
At normal temperatures, the aggregate of drying and filler are put in forced mixer, stir 2min.Add aqueous polyurethane emulsion subsequently, then stir 3min.Then add water, stir 2min.Finally add naphthalene series high-efficiency water-reducing agent.Finally add naphthalene series high-efficiency water-reducing agent, stir 2min, make mixture reach uniform state, can construct.
Above-described embodiment further illustrates of the present invention, but do not limit the present invention.
Claims (10)
1. a decking water-based polyurethane polymer modified concrete, it is characterized in that being made up of ordinary Portland cement, stone, medium sand, flyash, silicon ash, naphthalene water reducer, aqueous polyurethane emulsion and water, each components by weight is followed successively by: 16.8% ~ 18.9%, 29.8% ~ 31%, 36% ~ 39.8%, 2.7% ~ 3.0%, 1.5% ~ 1.8%, 0.2% ~ 0.25%, 5.4% ~ 7.2%, 2% ~ 3.65%.
2. decking water-based polyurethane polymer modified concrete according to claim 1, is characterized in that: the water reducer of described naphthalene water reducer to be β-naphthalene sulfonic acidformaldehyde condensation product be main component.
3. decking water-based polyurethane polymer modified concrete according to claim 1 and 2, is characterized in that: described aqueous polyurethane emulsion to be solid content be 35% aqueous polyurethane.
4. decking water-based polyurethane polymer modified concrete according to claim 1 and 2, is characterized in that: the maximum particle diameter of described stone is no more than 20mm.
5. decking water-based polyurethane polymer modified concrete according to claim 3, is characterized in that: the maximum particle diameter of described stone is no more than 20mm.
6. a preparation method for decking water-based polyurethane polymer modified concrete, is characterized in that:
Component comprises ordinary Portland cement, stone, medium sand, flyash, silicon ash, naphthalene water reducer, aqueous polyurethane emulsion and water, and each components by weight is followed successively by: 16.8% ~ 18.9%, 29.8% ~ 31%, 36% ~ 39.8%, 2.7% ~ 3.0%, 1.5% ~ 1.8%, 0.2% ~ 0.25%, 5.4% ~ 7.2%, 2% ~ 3.65%;
At normal temperatures the stone of drying and ordinary Portland cement, medium sand, flyash, silicon ash are put in stirrer, stir 2min, add aqueous polyurethane emulsion subsequently, stir 3min again, then add water, stir 2min, finally add naphthalene water reducer, stir 2min.
7. the preparation method of decking water-based polyurethane polymer modified concrete according to claim 6, is characterized in that: the water reducer of described naphthalene water reducer to be β-naphthalene sulfonic acidformaldehyde condensation product be main component.
8. the preparation method of the decking water-based polyurethane polymer modified concrete according to claim 6 or 7, is characterized in that: described aqueous polyurethane emulsion to be solid content be 35% aqueous polyurethane.
9. the preparation method of the decking water-based polyurethane polymer modified concrete according to claim 6 or 7, is characterized in that: the maximum particle diameter of described stone is no more than 20mm.
10. the preparation method of decking water-based polyurethane polymer modified concrete according to claim 8, is characterized in that: the maximum particle diameter of described stone is no more than 20mm.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105645875A (en) * | 2016-01-04 | 2016-06-08 | 哈尔滨工程大学 | Water-based polyurethane-carbon fiber polymer modified concrete for high-pile wharf slabs and preparation method thereof |
| CN105819788A (en) * | 2016-03-18 | 2016-08-03 | 苏州亚思科精密数控有限公司 | Anti-fracture machine tool base |
| CN106082855A (en) * | 2016-06-16 | 2016-11-09 | 夏学云 | A kind of high intensity high-durability modified concrete structure repair material |
| CN106587727A (en) * | 2016-12-23 | 2017-04-26 | 宁波工程学院 | Polyurethane composite concrete material for bridge deck pavement and using method thereof |
| CN106587728A (en) * | 2016-12-23 | 2017-04-26 | 宁波工程学院 | High-wear resistance polyurethane composite concrete material and using method thereof |
| CN109437764A (en) * | 2018-12-20 | 2019-03-08 | 江苏合谷建筑设计有限公司 | A kind of feed preparation process and its special agitating apparatus of anticorrosive concrete structure |
| CN110372295A (en) * | 2019-07-12 | 2019-10-25 | 同济大学 | High-intensity and high-tenacity light polyurethane rubber bridge deck pavement material and its preparation |
| CN113292273A (en) * | 2021-06-10 | 2021-08-24 | 安徽瑞澳混凝土有限公司 | Concrete composite additive and preparation method thereof |
| CN118148295A (en) * | 2024-03-12 | 2024-06-07 | 中南林业科技大学 | Hollow built-in square steel pipe concrete member |
| CN118754581A (en) * | 2024-09-05 | 2024-10-11 | 四川路航建设工程有限责任公司 | Quick-setting and scouring-resistant water-rich tunnel sprayed concrete and preparation method and application thereof |
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2015
- 2015-04-22 CN CN201510193950.5A patent/CN104788062A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105645875A (en) * | 2016-01-04 | 2016-06-08 | 哈尔滨工程大学 | Water-based polyurethane-carbon fiber polymer modified concrete for high-pile wharf slabs and preparation method thereof |
| CN105645875B (en) * | 2016-01-04 | 2018-03-13 | 哈尔滨工程大学 | Long piled wharf panel aqueous polyurethane carbon fiber polymer modification concrete and preparation method |
| CN105819788A (en) * | 2016-03-18 | 2016-08-03 | 苏州亚思科精密数控有限公司 | Anti-fracture machine tool base |
| CN106082855A (en) * | 2016-06-16 | 2016-11-09 | 夏学云 | A kind of high intensity high-durability modified concrete structure repair material |
| CN106587727A (en) * | 2016-12-23 | 2017-04-26 | 宁波工程学院 | Polyurethane composite concrete material for bridge deck pavement and using method thereof |
| CN106587728A (en) * | 2016-12-23 | 2017-04-26 | 宁波工程学院 | High-wear resistance polyurethane composite concrete material and using method thereof |
| CN109437764A (en) * | 2018-12-20 | 2019-03-08 | 江苏合谷建筑设计有限公司 | A kind of feed preparation process and its special agitating apparatus of anticorrosive concrete structure |
| CN109437764B (en) * | 2018-12-20 | 2019-10-22 | 苏州清溪环保科技有限公司 | A kind of feed preparation process and its special agitating apparatus of anticorrosive concrete structure |
| CN110372295A (en) * | 2019-07-12 | 2019-10-25 | 同济大学 | High-intensity and high-tenacity light polyurethane rubber bridge deck pavement material and its preparation |
| CN110372295B (en) * | 2019-07-12 | 2021-02-02 | 同济大学 | High-strength high-toughness light polyurethane rubber bridge deck pavement material and preparation thereof |
| CN113292273A (en) * | 2021-06-10 | 2021-08-24 | 安徽瑞澳混凝土有限公司 | Concrete composite additive and preparation method thereof |
| CN118148295A (en) * | 2024-03-12 | 2024-06-07 | 中南林业科技大学 | Hollow built-in square steel pipe concrete member |
| CN118148295B (en) * | 2024-03-12 | 2024-10-01 | 中南林业科技大学 | Hollow built-in square steel pipe concrete member |
| CN118754581A (en) * | 2024-09-05 | 2024-10-11 | 四川路航建设工程有限责任公司 | Quick-setting and scouring-resistant water-rich tunnel sprayed concrete and preparation method and application thereof |
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Application publication date: 20150722 |
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