CN104944872A - Cement concrete pavement self-repair material and preparation method thereof - Google Patents
Cement concrete pavement self-repair material and preparation method thereof Download PDFInfo
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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
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Abstract
The invention provides a cement concrete pavement self-repair material which comprises the following components: 50-500 parts of common Portland cement, 50-450 parts of sulphate aluminium cement, 100-300 parts of medium sand, 5-60 parts of redispersible emulsion powder, 1-5 parts of an organic silicon defoamer, 0.5-8 parts of cyclodextrin, 0.8-4 parts of tartaric acid, 0.5-3.5 parts of cellulose ether, 10-60 parts of fluorspar powder, 10-60 parts of obsidian powder, 0.7-2.5 parts of lithium carbonate, 10-100 parts of slag powder and 10-70 parts of pulverized fuel ash. The invention further provides a preparation method of the cement concrete pavement self-repair material. The quantity of generated building wastes is relatively small, environmental pollution is avoided, and a road is opened to traffic after 10-48 hours, so that the time and manpower are saved, and the cement concrete pavement self-repair material benefits the nation and the people.
Description
Technical field
The present invention relates to field of road, refer to a kind of cement concrete pavement self-repair material especially, the invention allows for the preparation method of above-mentioned cement concrete pavement self-repair material.
Background technology
Cement concrete pavement has the advantages such as supporting capacity is large, good stability, long service life, routine servicing expense are few, is now widely used in road surface and Irish bridge in airport runways, motorway, arterial highway, urban road, factories and mines road and field, stop, tunnel.Cement pavement easily produces hair line as do not repaired in time, and crackle can expand, and causes pavement damage to expand.At present, when cement concrete road top course carries out reparation transformation, the quantities of the original surface layer of global purge is large, and causes a large amount of building waste and environmental pollution.In the recovery project of cement concrete pavement, for above-mentioned Problems existing, need to propose a kind of to there are Quick-forming, energy-conserving and environment-protective and can the selfreparing cement concrete pipeline material of larger minimizing building waste.
Summary of the invention
First object of the present invention is to propose a kind of cement concrete pavement self-repair material, meets water self-healing during cracking, and can reduce waste material of buildings generation in the reparation transformation of road surface.
Second object of the present invention is the preparation method proposing above-mentioned cement concrete pavement self-repair material.
First object of the present invention be by the following technical solutions:
A kind of cement concrete pavement self-repair material, its formula composition comprises: the ordinary Portland cement of 50 ~ 500 parts, the aluminosulfate cement of 50 ~ 450 parts, the medium sand of 100 ~ 300 parts, the redispersable latex powder of 5 ~ 60 parts, the silicone antifoam agent of 1 ~ 5 part, 0.5 ~ 8 part of cyclodextrin, the tartrate of 0.8 ~ 4 part, the ether of cellulose of 0.5 ~ 3.5 part, the Fluorspar Powder of 10 ~ 60 parts, the obsidian powder of 10 ~ 60 parts, 0.7 ~ 2.5 part of Quilonum Retard, the slag powders of 10 ~ 100 parts and flyash of 10 ~ 70 parts.
Further, described self-repair material also comprises the dehydrated gyp-of 18 ~ 35 parts.
Further, described self-repair material also comprises the PVA fiber of 16 parts, the square synthetic fibre fiber of 2 parts, 2 parts of polypropylene fibres, 1 part of carbon fiber and 1 part of steel fiber.
Further, described self-repair material also comprises the polycarboxylate water-reducer of 2 ~ 3.5 parts.
Further, described redispersable latex powder is EVA redispersable latex powder.
Further, described ordinary Portland cement is P II 52.5R type silicate cement.
Further, described aluminosulfate cement is 42.5# type aluminosulfate cement.
Further, described ether of cellulose is Vltra tears.
Water consumption when product of the present invention uses is 17% ~ 20% of cured article weight part.
Second goal of the invention of the present invention is achieved by the following technical programs:
A preparation method for cement concrete pavement self-repair material, comprises the following steps:
(1) get ordinary Portland cement, aluminosulfate cement, medium sand, EVA redispersable latex powder, dehydrated gyp-, polycarboxylate water-reducer, silicone antifoam agent, tartrate, cyclodextrin, ether of cellulose, flyash, Fluorspar Powder, obsidian powder and slag powders agravic blender to stir 20 ~ 30 minutes;
(2) mixture, PVA fiber, square synthetic fibre fiber, polypropylene fibre, carbon fiber and steel fiber acquired in above-mentioned (1) are added the finished product that agravic blender stirs 2 ~ 8 minutes.
The beneficial effect that the present invention compared with prior art has is: cement concrete pavement self-repair material of the present invention has self-repair function to hair line, extend Road Service Life, the construction waste produced is less, environmental pollution can not be caused, and can repair fast again, within 10 ~ 48 hours, can be open to traffic, time saving and energy saving, benefit the nation and the people.
Embodiment
For the understanding the present invention making those skilled in the art more clear and intuitive, below the present invention is further illustrated.
Below first each composition contained by patching material of the present invention is described.
< silicate cement >
Silicate cement, is referred to as portland cement in the world, is a kind of hydraulic cementing materials, and its main component is Calucium Silicate powder.
Silicate cement divides two types, not admixture mixing material be called I type silicate cement, code name P I; What admixture was no more than the Wingdale of cement quality 5% or granulated blast-furnace slag mixing material is called II type silicate cement, code name P II.The strength grade of silicate cement is divided into 32.5,32.5R, 42.5,42.5R, 52.5,52.5R, 62.5,62.5R six grades.Preferably adopt the PII52.5R type in silicate cement in embodiments of the invention, namely in II type silicate cement, intensity is the cement of 52.5R.
The fast solidifying of silicate cement, early strength and later strength high, frost resistance is good, wear resistance is good, but corrosion-resistant, poor heat resistance, therefore needs some other materials'use of arranging in pairs or groups, and embodiment of the present invention mesosilicic acid salt cement can provide certain bending and compressive strength for patching material of the present invention.
< aluminosulfate cement >
Aluminosulfate cement is mainly with the novel concrete that anhydrous calcium sulphoaluminate and Dicalcium Phosphate (Feed Grade) form for essential mineral, and it has higher early strength, and has ever-increasing later strength.Meanwhile, it has the time of coagulation meeting service requirements, and anti-freezing property is high, and corrosion resisting property, anti-permeability performance are strong, and weather resistance is better.
Aluminosulfate cement used in the present invention adopts 42.5# type aluminosulfate cement, can provide certain early stage bending and compressive strength for patching material of the present invention.
< dehydrated gyp->
The effect of dehydrated gyp-in cement mainly contains and improves cement early strength, exciting agent as slag cement, offsets early-age shrinkage, regulates cement setting time, as mineralizer.
< medium sand >
The fineness of sand refers to the average thickness degree that the sand grains of different-grain diameter mixes.Usually dividing of coarse sand, medium sand, fine sand is had.The grain composition of sand refers to the blend proportion of sand size particles.Together, between sand, space is maximum, and the collocation of the sand of two kinds of particle diameters is got up, and space reduces to some extent in the sand collocation of same thickness, and the sand collocation of three kinds of particle diameters, space is minimum.As can be seen here, the voidage of sand depends on the collocation degree of sand material particle diameter at different levels.The sand that level prepares, not only can save cement, also improve degree of compactness and the intensity of concrete and mortar.The thickness of sand represents with fineness modulus Mx, coarse sand Mx=3.7-3.1, medium sand Mx=3.0-2.3, fine sand Mx=2.2-1.6.Fineness modulus is larger, represents that sand is thicker.According to fineness modulus magnitude range, sand is divided into coarse sand, medium sand, fine sand, ultra fine sand.
< redispersable latex powder >
Redispersable latex powder is a kind of water-soluble redispersible powder, and be multipolymer, the vinyl acetate between to for plastic/tertiary monocarboxylic acid ethylene copolymer of ethylene/vinyl acetate, acrylic copolymer etc., using polyvinyl alcohol as protective colloid.Redispersable latex powder has high viscosifying power and unique performance, as: water resisting property, application property and thermal insulation etc., also there is extremely outstanding cohesive strength, the flexibility of mortar can be improved and have the longer open hour, the alkali resistance that mortar is excellent can be given, improve the adhesivity of mortar, binding property, folding strength, water-repellancy, plasticity-, wear resisting property and application property.
Preferably adopt EVA redispersable latex powder in the embodiment of the present invention, by making the content of redispersable latex powder be in this content range, the adhibit quality of material, toughness, wear resistance can be increased, improve force of cohesion, improve deformability and application property.
< tartrate >
Tartrate, i.e. 2,3 dihydroxybutanedioic acid, in patching material of the present invention, it is used as retardant, and the aquation that can slow down concentrates Exotherm Time, provides application property in earlier stage.
< Quilonum Retard >
Quilonum Retard is a kind of colourless monoclinic system crystal body or white powder, can improve the condensation early strength of patching material of the present invention.
< fiber >
Fiber can improve toughness, the bending and compressive strength of material, and reduce and shrink, impact resistant splits, wear-resisting ageing-resistant function.Polyvinyl alcohol fiber (pva fiber), square synthetic fibre fiber and polypropylene fibre and the collocation of carbon fiber dimension is adopted to use in the present invention.
Wherein, the alkalescence of polyvinyl alcohol fiber ability cement, and with the cohesiveness of cement and affinity good, it can increase the intensity of material in the present invention, makes it wear-resisting ageing-resistant; Side's synthetic fibre fiber is a kind of novel high-tech synthon, there is superstrength, high-modulus and high temperature resistant, acid-fast alkali-proof, the premium properties such as lightweight, its intensity is 5 ~ 6 times of steel wire, modulus is 2 ~ 3 times of steel wire or glass fibre, toughness is 2 times of steel wire, and weight is only about 1/5 of steel wire, at the temperature of 560 degree, do not decompose, do not melt.It has good insulativity and ageing resistance, has very long life cycle; Polypropylene fibre has that light weight, intensity are high, good springiness, wear-resisting, corrosion-resistant, heat-resisting, aging resistance is poor, the feature of water absorbability and dyeability difference; Carbon fiber is the tencel material of the high strength of a kind of carbon content more than 95%, high modulus fibre, and collocation in the present invention uses carbon fiber, can increase the intensity of material, improves anti-folding and anti-pressing performance; Steel Fiber Reinforced Concrete has good material property, and compared with normal concrete, its ultimate compression strength improves 2 ~ 20%; Flexural tensile strength improves 20 ~ 50%; Tensile splitting strength improves 20 ~ 40%; Wear resisting property improves about 40%, and its physical force rationality can meet the supporting component requirement technology such as urban road engineering and manhole cover index completely.Coarse and the surface of cleaning of steel fiber, can firmly be combined by the cement slurry in concrete, and this is the basic reason that milling chatter improves the various performance of concrete.Five are combined the toughness that can improve material further, and its wear-resisting ageing-resistant performance is strengthened.
< ether of cellulose >
Ether of cellulose is a kind of macromolecular compound with ether structure be made up of Mierocrystalline cellulose.Mierocrystalline cellulose then can water-soluble, dilute alkaline soln and organic solvent after etherificate, and has thermoplasticity.According to substituent classification of chemical structure, ether of cellulose can be divided into negatively charged ion, positively charged ion and non-ionic type ethers.Have methylcellulose gum, hydroxyethylmethyl-cellulose, carboxymethyl cellulose, ethyl cellulose, benzyl cellulose, Natvosol, Vltra tears, cyanoethyl cellulose, α-tolunitrile ethyl cellulose, carboxymethyl hydroxyethyl cellulose and benzyl cellulose etc. with the difference of etherifying agent used, wherein with methylcellulose gum and ethyl cellulose practicality larger.
The ether of cellulose used in the present invention is not particularly limited, water retaining function can be realized, by using ether of cellulose, the mobility of patching material of the present invention at whipping process and the slipping of construction can be improved, it can make the moisture in patching material not easily lose simultaneously, and progressively discharge within long period of time, give the good water-retentivity of patching material and workability.
< polycarboxylate water-reducer >
Polycarboxylate water-reducer is a kind of high-performance water reducing agent, is a kind of cement dispersants during cement concrete uses.Polycarboxylate water-reducer has Strong dispersion effect to cement, can greatly improve cement mixture mobility and concrete slump, significantly reduces water consumption simultaneously, significantly improves workability of concrete, and significantly improve each age strength of concrete.
The polycarboxylate water-reducer used in the present invention is not particularly limited, and it can reduce water consumption, increases the density of patching material of the present invention, intensity and mobility.
< silicone antifoam agent >
Silicone antifoam agent is the polymethyl siloxane based on modification, adds appropriate inorganic, organic surface active agent, is refined into powder through special process.The silicone antifoam agent used in the present invention is also not particularly limited, and the froth breaking power of silicone antifoam agent is strong, and it can also increase density and the intensity of patching material in the present invention simultaneously.
< Fluorspar Powder >
Fluorite, be a kind of natural halogen compounds of calcium, major ingredient is CaF
2, Fluorspar Powder does mineralizer and retardant in Cement industry.
< flyash >
Flyash receives to catch the thin ash got off from the flue gas after coal combustion, and flyash is the primary solids refuse that coal-burning power plant discharges.The main oxides of power plants flyash consists of: SiO2, Al2O3, FeO, Fe2O3, CaO, TiO2 etc.Flyash is one of industrial residue that the current discharge capacity of China is larger, and along with the development of power industry, the flyash quantity discharged of coal-burning power plant increases year by year.A large amount of flyash does not add process, will produce airborne dust, atmosphere pollution; River can be caused to silt up if enter water system, and toxic chemical substance wherein also can work the mischief to human body and biology.
Fly ash grain is multi-hole type cellular tissue, and specific surface area is comparatively large, and have higher adsorption activity, the particle size range of particle is 0.5 ~ 300 μm.And Zhu Bi has vesicular structure, porosity, up to 50% ~ 80%, has very strong water-absorbent.
< obsidian powder >
Obsidian is a kind of acidic glass matter volcanics, composition is suitable with grouan, and its dioxide-containing silica is about 70%, and water content is generally less than 2%, there is unit weight little, swelling property is good, and refractoriness is high, and chemical stability is strong, thermal conductivity is low, sound absorbing, water absorbability is little, freeze proof, acidproof, insulation feature.
< cyclodextrin >
Cyclodextrin (Cyclodextrin, be called for short CD) be the general name of a series of cyclic oligosaccharides that amylose starch generates under the cyclomaltodextrin glucanotransferase effect produced by genus bacillus, usually containing 6 ~ 12 D-glucopyranose units, outer rim (Rim) due to cyclodextrin is hydrophilic and inner chamber (Cavity) is hydrophobic, thus it can provide a hydrophobic combining site as the enzyme, as the various suitable object (Guest) of main body (Host) envelope, there is following effect: 1. for concrete construction under hot weather high atmospheric temperature and casting of concrete in mass shaping time delaying time of coagulation (initial set and final set), 2. mass concrete mix cyclodextrin can make hydration heat discharge slow down, be conducive to dissipate heat and reduce temperature difference between inside and outside concrete, avoid produce thermal cracking, 3. can regulate, control slump loss, be that concrete keeps good mobility and pumpability within the required time period, 4. can significantly improve concrete compaction rate thus improve concrete weather resistance.
< slag powders >
Slag is the grain slag that blast furnace ironmaking produces, slag powders be blast furnace granulated slag by after fine grinding, reach suitable fineness and meet the powder of suitable activity index.The effect of slag powders and feature: (1) reduces slump-loss; (2) greatly concrete durability is improved; (3) to concrete remarkable enhancement; (4) excellent Plant ecology inhibitor; (5) erosion resistance of Concrete Structure; (6) concrete pumpability is improved; (7) concrete water bleeding is reduced; (8) improve concrete microtexture, the voidage of cement slurry is obviously declined, enhances the cohesive force of aggregate Interface, concrete physics characteristic is improved greatly; (9) cement consumption is reduced cost-saving.
Embodiment 1
A kind of cement concrete pavement self-repair material, its formula composition comprises: the P II 52.5R type silicate cement of 300kg, the 42.5# type aluminosulfate cement of 235kg, the medium sand of 250kg, the EVA redispersable latex powder of 18kg, the silicone antifoam agent of 2.6kg, 1.6kg cyclodextrin, the dehydrated gyp-of 25kg, the tartrate of 1.0kg, the Vltra tears of 1.5kg, the PVA fiber of 16kg, the square synthetic fibre fiber of 2kg, 2kg polypropylene fibre, 1kg carbon fiber, the steel fiber of 1kg, the polycarboxylate water-reducer of 3kg, the Fluorspar Powder of 28kg, the obsidian powder of 35kg, the Quilonum Retard of 1.3kg, the slag powders of 50kg and the flyash of 28kg, water consumption when it uses is 19% of cured article gross weight.
It is about 24h that the road surface reparation of the present embodiment is open to traffic consuming time.
Embodiment 2
A kind of selfreparing cement concrete pipeline material, its formula composition comprises: the P II 52.5R type silicate cement of 400kg, the 42.5# type aluminosulfate cement of 135kg, the medium sand of 250kg, the EVA redispersable latex powder of 18kg, the silicone antifoam agent of 3kg, 1.6kg cyclodextrin, the dehydrated gyp-of 25kg, the tartrate of 2kg, the Vltra tears of 1.5kg, the PVA fiber of 16kg, the square synthetic fibre fiber of 2kg, 2kg polypropylene fibre, 1kg carbon fiber, 1kg steel fiber, the polycarboxylate water-reducer of 2.6kg, the Fluorspar Powder of 30kg, the obsidian powder of 40kg, the Quilonum Retard of 1.3kg, the slag powders of 45kg and the flyash of 25kg, the water consumption of its product is 20% of cured article gross weight.
It is about 48h that the road surface reparation of the present embodiment is open to traffic consuming time.
Embodiment 3
A kind of selfreparing cement concrete pipeline material, its formula composition comprises: the P II 52.5R type silicate cement of 255kg, the 42.5# type aluminosulfate cement of 275kg, the medium sand of 250kg, the EVA redispersable latex powder of 22kg, the silicone antifoam agent of 2.6kg, 1.6kg cyclodextrin, the dehydrated gyp-of 26kg, the tartrate of 2kg, the Vltra tears of 1.5kg, the PVA fiber of 16kg, the square synthetic fibre fiber of 2kg, 2kg polypropylene fibre, 1kg carbon fiber, 1kg steel fiber, the polycarboxylate water-reducer of 3kg, the Fluorspar Powder of 25kg, the obsidian powder of 35kg, the Quilonum Retard of 1.3kg, the slag powders of 50kg and the flyash of 30kg, the water consumption of its product is 20% of cured article gross weight.
It is about 12h that the road surface reparation of the present embodiment is open to traffic consuming time.
Selfreparing cement concrete pipeline material described in embodiment 1 ~ 3 prepares by the following method:
(1) get ordinary Portland cement, aluminosulfate cement, medium sand, EVA redispersable latex powder, dehydrated gyp-, polycarboxylate water-reducer, silicone antifoam agent, tartrate, cyclodextrin, ether of cellulose, flyash, Fluorspar Powder, obsidian powder and slag powders agravic blender to stir 20 ~ 30 minutes;
(2) mixture, PVA fiber, square synthetic fibre fiber, polypropylene fibre, carbon fiber and steel fiber acquired in above-mentioned (1) are added the finished product that agravic blender stirs 2 ~ 8 minutes.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a cement concrete pavement self-repair material, it is characterized in that, its formula composition comprises: the ordinary Portland cement of 50 ~ 500 parts, the aluminosulfate cement of 50 ~ 450 parts, the medium sand of 100 ~ 300 parts, the redispersable latex powder of 5 ~ 60 parts, the silicone antifoam agent of 1 ~ 5 part, 0.5 ~ 8 part of cyclodextrin, the tartrate of 0.8 ~ 4 part, the ether of cellulose of 0.5 ~ 3.5 part, the Fluorspar Powder of 10 ~ 60 parts, the obsidian powder of 10 ~ 60 parts, 0.7 ~ 2.5 part of Quilonum Retard, the slag powders of 10 ~ 100 parts and flyash of 10 ~ 70 parts.
2. cement concrete pavement self-repair material according to claim 1, is characterized in that: described self-repair material also comprises the dehydrated gyp-of 18 ~ 35 parts.
3. cement concrete pavement self-repair material according to claim 2, is characterized in that: described self-repair material also comprises the PVA fiber of 16 parts, the square synthetic fibre fiber of 2 parts, 2 parts of polypropylene fibres, 1 part of carbon fiber and 1 part of steel fiber.
4. cement concrete pavement self-repair material according to claim 3, is characterized in that: described self-repair material also comprises the polycarboxylate water-reducer of 2 ~ 3.5 parts.
5. cement concrete pavement self-repair material according to claim 4, is characterized in that: described redispersable latex powder is EVA redispersable latex powder or re-dispersible latex powder of acrylic acid.
6. cement concrete pavement self-repair material according to claim 5, is characterized in that: described ordinary Portland cement is P II 52.5R type silicate cement.
7. cement concrete pavement self-repair material according to claim 6, is characterized in that: described aluminosulfate cement is 42.5# type aluminosulfate cement.
8. cement concrete pavement self-repair material according to claim 7, is characterized in that: described ether of cellulose is Vltra tears.
9. the preparation method of a kind of cement concrete pavement self-repair material according to claim 8, is characterized in that, comprise the following steps:
(1) get ordinary Portland cement, aluminosulfate cement, medium sand, EVA redispersable latex powder, dehydrated gyp-, polycarboxylate water-reducer, silicone antifoam agent, tartrate, cyclodextrin, ether of cellulose, flyash, Fluorspar Powder, obsidian powder and slag powders agravic blender to stir 20 ~ 30 minutes;
(2) mixture, PVA fiber, square synthetic fibre fiber, polypropylene fibre, carbon fiber and steel fiber acquired in above-mentioned (1) are added the finished product that agravic blender stirs 2 ~ 8 minutes.
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| CN106517846A (en) * | 2016-10-20 | 2017-03-22 | 常州市鼎日环保科技有限公司 | Preparation method for anti-permeability self-repairing concrete |
| CN106630926A (en) * | 2016-12-28 | 2017-05-10 | 鲁东大学 | Composite material for self-repairing bridge cracks and preparation method thereof |
| CN107352910A (en) * | 2017-08-16 | 2017-11-17 | 关其焕 | A kind of selfreparing cement-base composite material |
| CN109734370A (en) * | 2019-03-14 | 2019-05-10 | 招商局重庆交通科研设计院有限公司 | A kind of cement concrete repair materials and preparation method thereof |
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| CN106517846A (en) * | 2016-10-20 | 2017-03-22 | 常州市鼎日环保科技有限公司 | Preparation method for anti-permeability self-repairing concrete |
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