CN105645875A - Water-based polyurethane-carbon fiber polymer modified concrete for high-pile wharf slabs and preparation method thereof - Google Patents
Water-based polyurethane-carbon fiber polymer modified concrete for high-pile wharf slabs and preparation method thereof Download PDFInfo
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- CN105645875A CN105645875A CN201610003558.4A CN201610003558A CN105645875A CN 105645875 A CN105645875 A CN 105645875A CN 201610003558 A CN201610003558 A CN 201610003558A CN 105645875 A CN105645875 A CN 105645875A
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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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- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
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- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
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Abstract
The invention provides a water-based polyurethane-carbon fiber polymer modified concrete for high-pile wharf slabs and a preparation method thereof. The water-based polyurethane-carbon fiber polymer modified concrete for high-pile wharf slabs is prepared from 17.8-19.9 wt% of Portland cement, 28.8-30 wt% of gravel, 35.5-39.3 wt% of medium sand, 3.2-3.5 wt% of fly ash, 1.5-1.8 wt% of silica fume, 0.2-0.25 wt% of naphthene high-efficiency water reducing agent, 5.4-7.2 wt% of water-based polyurethane, 2-3.65 wt% of water and 0.1-0.3 vol% of carbon fiber. The polymer modified concrete has the advantages of abrasion resistance, high strength, high durability and chlorine ion permeation resistance, thereby preventing the concrete from freeze-thawing destroy and reinforcing steel rust destroy, and prolonging the service life of the structure. The polymer modified concrete can be used in a fatigue-load-bearing high-pile wharf slab structure which requires higher durability or is difficult to repair.
Description
Technical field
The present invention relates to a kind of modified concrete, the preparation method that the present invention also relates to a kind of modified concrete. Specifically a kind of aqueous polyurethane carbon fiber polymer modification concrete suitable in long piled wharf panel and preparation method.
Background technology
Along with developing rapidly of coastal cities economy, marine shipping has become as a kind of requisite transportation trade. Thus, the construction of harbour also gets more and more, and wherein long piled wharf is widely used. Wharf slab is an important component part of high pile pier structure, and the durability of wharf slab directly affects the durability of whole long piled wharf. Meanwhile, the impaired maintenance of wharf slab delays the use of harbour, can affect the utilization benefit of reality, and therefore the selection of wharf slab material is highly important. Normal concrete wharf slab is the damaged because of Chloride Attack, frost and carbonization often. Although these damages are shallow surface at first, As time goes on, they can extend to endothecium structure material, causes reinforcement corrosion, threatens the life-span of bed rearrangement harbour. Therefore it is required that people develop the wharf slab material that durability is longer.
Have many about the harbour beam slab concrete research of carbon fiber polymer modification at present both at home and abroad, and have the bibliographical information for this technical research and analysis: such as " the enhancing Analysis on Mechanism of polymer steel fiber reinforced concrete " (Luo Lifeng, Zhou Jianchun, Huang Peiyan. " composite journal " 2002,19:46-50.) in, the polymer steel fibre modified concrete of employing adds butadiene-styrene latex and is prepared from; " anti-freezing property of polypropylene fibre composite glue powder modified concrete " (Fu Lipeng. " concrete and cement products ", 2014,11:49-51.) in, the polymer fiber and modified concrete mentioned mixes polypropylene fibre and VAE latex powder is modified processing; " research of steel fibre polymer cement concrete physical and mechanical property " (Zhao Xiang. Chongqing Jiaotong University, 2013.), obtaining high performance cement concrete by filling the method for steel fibre and styrene-butadiene emulsion in concrete, this steel fibre polymer high performance concrete has that tensile strength height, deformability be good, durability and corrosion resistance is good, have the features such as good adhesive property.This concrete is modified processing by adding steel fibre and styrene-butadiene emulsion; " performance study of fiber reinforced polymer cement concrete " (Yao Shuyi. Harbin Institute of Technology, 2011.), improve concrete intensity, toughness and durability by adding vinal and steel fibre; The cohesiveness of fiber and concrete substrate interface is improved by adding styrene-butadiene latex; Publication number is that in " a kind of fiber and polymer composite toughening concrete and preparation method thereof " disclosed in the patent document of CN1O301173OA (2013-04-03), concrete basic raw material is coarse aggregate, fine aggregate, portland cement, flyash, polycarboxylate water-reducer, vinal, copolymer in cinnamic acrylic ester.
Summary of the invention
It is an object of the invention to provide a kind of wharf slab that can efficiently solve under complex environment, be easily subject to the problem of corrosion failure, greatly reduce the long piled wharf panel aqueous polyurethane carbon fiber polymer modification concrete of rehabilitation expense in operation process. The present invention also aims to provide a kind of long piled wharf panel aqueous polyurethane concrete preparation method of carbon fiber polymer modification.
The long piled wharf panel aqueous polyurethane carbon fiber polymer modification concrete of the present invention is by portland cement, stone, medium sand, flyash, silicon ash, naphthalene series high-efficiency water-reducing agent, aqueous polyurethane, water and carbon fiber are made, wherein portland cement, stone, medium sand, flyash, silicon ash, naphthalene series high-efficiency water-reducing agent, aqueous polyurethane, the weight proportion of water is followed successively by: 17.8%��19.9%, 28.8%��30%, 35.5%��39.3%, 3.2%��3.5%, 1.5%��1.8%, 0.2%��0.25%, 5.4%��7.2%, 2%��3.65%, carbon fiber volume volume is 0.1%��0.3%.
The long piled wharf panel aqueous polyurethane concrete preparation method of carbon fiber polymer modification of the present invention is:
(1) methylcellulose is added in the water of 80 DEG C, dispersant concussion 3min, stand 20min, add carbon fiber, continue concussion to carbon fiber and be completely dispersed;
(2) product of step (1) is filtered, carbon fiber filter is out dried;
(3) at normal temperatures, dry stone and portland cement, medium sand, flyash, silicon ash and carbon fiber are put in blender, stirring 3min, it is subsequently added aqueous polyurethane emulsion, it is stirred for 3min, is subsequently added into water, stir 2min, it is eventually adding naphthalene series high-efficiency water-reducing agent, stirs 2min.
The present invention is directed to long piled wharf general panels and be easily subject to corrosion failure, the problem that intensity is low, it is provided that a kind of polymer modification concrete adding aqueous polyurethane and carbon fiber and preparation method. This polymer modification concrete has wear-resistant, high-strength, durable, the advantage of chloride-penetration resistance, thus preventing concrete freeze-thaw damage and steel bar corrosion from destroying, makes the life-span of structure be extended, thus obtaining better economic benefit. Wharf slab can be efficiently solved under complex environment, be easily subject to the problem of corrosion failure, greatly reduce the rehabilitation expense in operation process.
The invention provides long piled wharf panel aqueous polyurethane carbon fiber polymer modification concrete, it can be used in life requirement higher, or repairs relatively difficult, bears in the long piled wharf panel construction of fatigue load. Also can be used in the concrete workses such as marine structure, highway, tunnel, runway according to its feature.
Aqueous polyurethane carbon fiber polymer modification concrete provided by the invention, has following major advantage compared with traditional cement concrete:
The first, intensity is high, and waterborne polyurethane film is formed on slurry and the interface that gathers materials, it is possible to strengthen the cohesive force between aggregate and slurry. Simultaneously carbon fiber mix after can aggregation thing concrete inner structure, improve material globality. Carbon fiber relative intensity and tension toughness owing to adding are higher again, therefore can be substantially improved the bending resistance of polymer concrete, tensile strength. Its compressive strength is 72��78MPa, and bending strength is 16��18MPa, and hot strength is 12��14MPa.
The second, good endurance, owing to the pore of the thin film of aqueous polyurethane formation can stop absorption and the infiltration of water, such that it is able to effectively prevent the entrance of corrosive medium; Secondly because the drawknot effect of carbon fiber makes anti-crack ability be improved, decrease the formation of micro-crack grid, prevent the transmission of moisture; The silicon ash finally added makes to produce high PH medium in concrete has protective effect to reinforced steel bar rust preventing erosion.
3rd, hardening post-consumer polymer modified concrete has excellent impervious and anti-freezing property.
4th, preparation technology is simple, easy construction, and wearability is excellent with shock resistance.
5th, the flyash and the silicon ash that add belong to industrial waste, and therefore the features such as aqueous polyurethane has and do not pollute, transportation safety make material have the feature of energy-conserving and environment-protective.
6th, using extensively: this material is mainly used in bearing fatigue load, life requirement is high or repairs relatively difficult long piled wharf panel construction. It can in addition contain be widely used in the concrete workses such as marine structure, highway, tunnel, airfield runway.
Detailed description of the invention
Illustrate below and the present invention is described in more detail.
The long piled wharf panel aqueous polyurethane carbon fiber polymer modification concrete of the present invention is on the basis of normal concrete, flyash is added according to certain ratio, silicon ash, naphthalene series high-efficiency water-reducing agent, aqueous polyurethane, it is modified processing by the material such as carbon fiber. Wherein 52.5 Portland cements, maximum particle diameter less than the stone of 20mm, medium sand, flyash, silicon ash, naphthalene series high-efficiency water-reducing agent, aqueous polyurethane and these several raw materials of water, be followed successively by according to weight proportion: 17.8%��19.9%, 28.8%��30%, 35.5%��39.3%, 3.2%��3.5%, 1.5%��1.8%, 0.2%��0.25%, 5.4%��7.2%, 2%��3.65%. Carbon fiber volume volume 0.1%��0.3%.
The invention provides aqueous polyurethane carbon fiber polymer modification concrete to prepare in accordance with the following methods, its step includes:
1 proportioning: by the Portland cement of 52.5, the maximum particle diameter stone less than 20mm, medium sand, flyash, silicon ash, these several raw materials of naphthalene series high-efficiency water-reducing agent, aqueous polyurethane and water, are followed successively by according to weight proportion: 17.8%��19.9%, 28.8%��30%, 35.5%��39.3%, 3.2%��3.5%, 1.5%��1.8%, 0.2%��0.25%, 5.4%��7.2%, 2%��3.65%. Carbon fiber volume volume 0.1%��0.3%.
2 preparation technologies:
1) pouring in basin by water, water temperature is 80 DEG C, puts into methylcellulose dispersant concussion 3min, stands 20min, make methylcellulose solve homogeneously in water. Again carbon fiber is added, continue concussion to carbon fiber and be completely dispersed.
2) use drainage screen by carbon fiber filter out, be placed in drying baker and dry.
3) at normal temperatures, dry stone and Portland cement, medium sand, flyash, silicon ash and carbon fiber are put in blender, stirs 3min. It is subsequently added aqueous polyurethane emulsion, is stirred for 3min. It is subsequently added into water, stirs 2min. It is eventually adding naphthalene series high-efficiency water-reducing agent, stirs 2min, make mixture reach uniform state, can construct.
Test according to following experiments proportioning, test its mechanical property.
Embodiment 1:52.5 Portland cement, maximum particle diameter less than the stone of 20mm, medium sand, flyash, silicon ash, with �� naphthalene sulfonic acid-formaldehyde condensation product be main component concrete high efficiency water reducing agent, solid content be 35% aqueous polyurethane and these several raw materials of water, be followed successively by according to weight proportion: 17.8%, 28.8%, 39.3%, 3.2%, 1.5%, 0.2%, 7.2%, 2%. The carbon fiber volume volume of length 7mm is 0.3%.
Embodiment 2:52.5 Portland cement, maximum particle diameter less than the stone of 20mm, medium sand, flyash, silicon ash, with �� naphthalene sulfonic acid-formaldehyde condensation product be main component concrete high efficiency water reducing agent, solid content be 35% aqueous polyurethane and these several raw materials of water, be followed successively by according to weight proportion: 19.9%, 30%, 35.5%, 3.5%, 1.8%, 0.25%, 5.4%, 3.65%. The carbon fiber volume volume of length 7mm is 0.1%.
Above-described embodiment is further illustrating the present invention, but is not intended to the present invention.
According to the long piled wharf panel aqueous polyurethane carbon fiber polymer modification concrete material that the formula in examples detailed above is prepared, after tested, its Main Mechanical is in Table 1.
The Main Mechanical of table 1 long piled wharf panel aqueous polyurethane carbon fiber polymer modification concrete material
| Performance | Compressive strength MPa | Bending strength Mpa | Hot strength Mpa |
| Index | 72��78 | 16��18 | 12��14 |
Claims (3)
1. a long piled wharf panel aqueous polyurethane carbon fiber polymer modification concrete, it is characterized in that by portland cement, stone, medium sand, flyash, silicon ash, naphthalene series high-efficiency water-reducing agent, aqueous polyurethane, water and carbon fiber are made, wherein portland cement, stone, medium sand, flyash, silicon ash, naphthalene series high-efficiency water-reducing agent, aqueous polyurethane, the weight proportion of water is followed successively by: 17.8%��19.9%, 28.8%��30%, 35.5%��39.3%, 3.2%��3.5%, 1.5%��1.8%, 0.2%��0.25%, 5.4%��7.2%, 2%��3.65%, carbon fiber volume volume is 0.1%��0.3%.
2. the long piled wharf panel aqueous polyurethane concrete preparation method of carbon fiber polymer modification described in claim 1, is characterized in that:
(1) methylcellulose is added in the water of 80 DEG C, dispersant concussion 3min, stand 20min, add carbon fiber, continue concussion to carbon fiber and be completely dispersed;
(2) product of step (1) is filtered, carbon fiber filter is out dried;
(3) at normal temperatures, dry stone and portland cement, medium sand, flyash, silicon ash and carbon fiber are put in blender, stirring 3min, it is subsequently added aqueous polyurethane emulsion, it is stirred for 3min, is subsequently added into water, stir 2min, it is eventually adding naphthalene series high-efficiency water-reducing agent, stirs 2min.
3. the long piled wharf panel aqueous polyurethane concrete preparation method of carbon fiber polymer modification according to claim 2, is characterized in that: the concrete high efficiency water reducing agent that described naphthalene series high-efficiency water-reducing agent is is main component with �� naphthalene sulfonic acid-formaldehyde condensation product.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107721323A (en) * | 2017-11-24 | 2018-02-23 | 广东龙湖科技股份有限公司 | A kind of concrete for being highly resistant to organic solvent erosion |
| CN108298918A (en) * | 2018-04-10 | 2018-07-20 | 朱文杰 | The preparation method of maritime concrete is corroded in a kind of salt resistance |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107721323A (en) * | 2017-11-24 | 2018-02-23 | 广东龙湖科技股份有限公司 | A kind of concrete for being highly resistant to organic solvent erosion |
| CN108298918A (en) * | 2018-04-10 | 2018-07-20 | 朱文杰 | The preparation method of maritime concrete is corroded in a kind of salt resistance |
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