CN201694960U - Stone aggregate wrapped by micro-fiber polymer mortar thin layer - Google Patents
Stone aggregate wrapped by micro-fiber polymer mortar thin layer Download PDFInfo
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- CN201694960U CN201694960U CN2010202306729U CN201020230672U CN201694960U CN 201694960 U CN201694960 U CN 201694960U CN 2010202306729 U CN2010202306729 U CN 2010202306729U CN 201020230672 U CN201020230672 U CN 201020230672U CN 201694960 U CN201694960 U CN 201694960U
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Abstract
The utility model discloses a stone aggregate wrapped by a micro-fiber polymer mortar thin layer, which consists of a stone aggregate inner core, an adhesive inner-wrapping layer, a polymer cement mortar outer wrapping layer and an adhesive micro-fiber wool layer. The adhesive inner-wrapping layer is firmly adhered to the stone aggregate, the micro-fiber yarns are anchored and rooted on the adhesive inner-wrapping layer, and the polymer cement mortar outer wrapping layer and the adhesive inner-wrapping layer are mutually dissolved and integrated into a whole. The reactive powder in the polymer cement mortar outer wrapping layer comprises reactive materials such as microsilica, zeolite powder, ground slag, fly ash and the like, and can have volcanic ash reaction with the Ca (OH) 2 crystal on the set cement interface to generate gelled material, thereby improving the weakest set cement and stone aggregate interface in concrete. The modified stone aggregate provided by the utility model has excellent affinity with the set cement, and has high cohesive force with the set cement.
Description
Technical field
The utility model relates to a kind of modification stone aggregate, helps improving the adhesive property of stone aggregate and cement stone interface, can improve the ultimate compression strength of concrete product, improves the use properties of concrete product.
Background technology
After concrete mixes high efficiency water reducing agent, flyash, silica flour, zeolite, steel fiber, polypropylene fibre, can effectively improve concrete intensity and other use propertieies.But, concrete microanalysis research is learnt, water reducer, reactive powder and fiber mix the degree of compactness and the mechanical strength that only can effectively improve cement stone in the concrete, cohesive force to the zone of transition of stone aggregate and cement stone interface is improved DeGrain, exists the zone of stone aggregate and cement stone interface weakness.
Concrete strength is by the decision of the cohesive strength between aggregate intensity, cement strength and cement stone and aggregate surface, and in general, aggregate intensity is enough.Main, the weakest link is the cohesive force at interface between each phase material in the concrete structure, and wherein the cohesive force at cement stone and stone interface plays decisive role to concrete strength.The opinion with submicroscopic level, concrete is the material that is formed by three-phase composite, i.e. aggregate, cement stone and interface transition layer.There are zone of transition in coarse aggregate and hydrated cement paste body interface, and there is thin layer in zone of transition around the coarse aggregate, thick about 10～50 μ m, interfacial transition zone than concrete cement stone and stone aggregate a little less than, the interface region is very big to the influence of concrete mechanics behavior.Mainly have hydrated calcium silicate, Ca (OH) in the interface region
2, ettringite and not the grog particle of hydration reaction and hole, crack.There is the more weak Ca of more intensity (OH) in the interface region
2For many, these characteristics have determined that interfacial transition zone intensity is low, cause the crack easily than cement stone zone for crystal, the pore quantity of interface region, will have a negative impact to the interface bonding.
Concrete strength is by the decision of the cohesive strength between aggregate intensity, cement strength and cement stone and aggregate surface, and in general, aggregate intensity is enough.Main, the weakest link is the cohesive force at interface between each phase material in the concrete structure, and wherein the cohesive force at cement stone and stone interface plays decisive role to concrete strength.Stone enveloped with cement method concrete stirring technology studies show that, clean slurry lapicide artistic skill enough improves the concrete bulk strength, improve the even divergence of material granule, the mechanical snap effect at refinforced cement stone and stone interface, stop the part free-water to concentrate the boundary strength between refinforced cement stone and stone to stone and grout interface.Regenerated aggregate concrete is relevant to be studies show that: its intensity of concrete of high strength regeneration aggregate configuration is higher, its reason mainly is its bonding interface and higher interface binding intensity preferably, regeneration aggregate is owing to form bigger physical bond intensity between the uneven easy and cement stone of physical surface, the high surfaces activity of regeneration aggregate is easy to form higher chemical bonding intensity with the grout reaction, regeneration aggregate and novel concrete cement stone have close Young's modulus, thereby concrete is when stressed, to produce less stress-difference at the interface, trend at the stressed generation microfracture of bonding interface reduces, and this experimental phenomena is called the high strength regeneration aggregate to concrete interface reinforcing effect.Therefore, stone aggregate surface adopts gluing interfacial agents to carry out extraordinary crude processing, makes itself and the cohesive strength raising of cement stone, thereby can improve concrete intensity, improves concrete use properties.
At present, polymer adhesive and polypropylene fibre have obtained using widely, have obtained good engineering effort.If improved treatment is carried out on the stone aggregate surface, can improve the cohesive strength and the interface affinity of stone aggregate and cement stone with polymer mortar interfacial agents and fine synthon.At first, after stone is cleaned oven dry, at the very thin emulsion adhesive of stone aggregate surface parcel one deck, spray high-intensity fine synthon to the stone aggregate gluing surface, stir in advance, and then spraying polymer sand-cement slurry interfacial agents, fully uniform mixing, adopt steam press maintenance, obtain having the surperficial crude improvement stone aggregate of wrapping up in slurry thin layer and gluing microfibre batt, i.e. the stone aggregate of a kind of wrapped by microfine fibre polymer mortar thin layer of the present utility model.Stone aggregate after the utilization improvement carries out concrete member and builds, after the concrete knot is hard, advantages such as cement stone and stone aggregate interface have good viscosifying power, and its concrete product has that ultimate compression strength height, non-deformability are strong, good endurance, inhibition alkali-aggregate reaction are effective.
The utility model content
Technical problem: the utility model provides a kind of stone aggregate of wrapped by microfine fibre polymer mortar thin layer, improves the affinity of stone aggregate and cement stone interface, improves the cohesive strength of stone aggregate and cement stone interface.
Technical scheme:
A kind of stone aggregate of wrapped by microfine fibre polymer mortar thin layer, comprise: the stone aggregate kernel, on the outside surface of stone aggregate kernel, be enclosed with the tackiness agent inner wrapped layer, on the outside surface of tackiness agent inner wrapped layer, be enclosed with the polymer cement mortar jacket layer, be connected with the outside that fiber on gluing microfibre batt and the described gluing microfibre batt extends to the polymer cement mortar jacket layer on the described tackiness agent inner wrapped layer.
The stone aggregate of a kind of wrapped by microfine fibre polymer mortar thin layer described in the utility model, main purpose are to improve affinity, the cohesive strength of cement stone and stone aggregate interface in the concrete product.Product is made of stone aggregate kernel, tackiness agent inner wrapped layer, polymer cement mortar jacket layer and gluing microfibre batt.Wrap up in the gluing fibre thin layer purpose of slurry and make stone aggregate carry out improved treatment exactly, allow stone aggregate put on " coat " and grow " hair ", so that improve stone aggregate and cement stone has better cohesive strength and interface affinity.
The utility model carries out improved treatment with gluing interfacial agents and technical fiber to the stone aggregate surface, can improve the cohesive strength and the interface affinity of stone aggregate and cement stone.The tackiness agent parcel is cleaned the stone aggregate of oven dry, stone aggregate shows can form gluing firm basic unit's face, so that microfibre silk and stone aggregate surface adhesion anchoring are together taken root, tackiness agent inner wrapped layer and polymer cement mortar jacket layer should have intermiscibility, so that tackiness agent basic unit face that stone aggregate is wrapped up in outward and interfacial agents skin can effectively form integral body.The effect of microfibre batt is drawknot effect and the cohesive strength that increases stone aggregate and cement stone, thereby improves concrete intensity, and improves concrete deformation performance.The material moiety of polymer cement mortar jacket layer is close with cement stone, so that guarantee affinity, cohesive strength between cement stone and the improvement stone aggregate.The polymer cement mortar jacket layer is made up of materials such as organic adhesion agent, cement, reactive powder, water reducers, and the composition of organic adhesion agent can have affinity, cohesive strength preferably with the tackiness agent inner wrapped layer; Cement composition and interface moisture hydration reaction generate gelling material, further bond microfibre; Comprise SILICA FUME, zeolite powder, ground slag and flyash in the reactive powder, can with the Ca (OH) at interface
2Crystal produces pozzolanic reaction, generates gelling material; The admixture of high efficiency water reducing agent can reduce the water content in the mortar interface agent, so that reduce the fine hole and the microscopic checks at interface.The manufacture method of this modification stone aggregate comprises following processing step: stone aggregate is cleaned oven dry, and stone basic unit face is wrapped up in glue, sprays the fine-fibered silk, and polymer cement mortar is wrapped up in outward, steam press maintenance, and the modification aggregate stores, the concrete preparation.Modification stone aggregate finished product of the present utility model is the siccative commodity.
Modification stone aggregate of the present utility model has crude physical surface, its surface layer material moiety is close with cement stone composition, modification stone aggregate and cement stone have good affinity, advantage such as have with the higher concrete product of preparing with the modification stone aggregate of the cohesive force of cement stone that ultimate compression strength height, non-deformability are strong, good endurance, inhibition alkali-aggregate reaction are effective.
The concrete stone aggregates of parcel cellulosic polymer mortar thin layer of the present utility model should be made specially in advance, and its manufacture craft flow process is: stone is cleaned oven dry, and---stone basic unit face is wrapped up in glue, and------polymer cement mortar is wrapped up in outward, and---steam press maintenance---finished product storage---is improved the application of stone to spray microfibre.In making the operation of improvement stone aggregate, must be noted that and promptly grab thin each link, the strict gelation time of controlling each procedure, concrete key point for process is as follows:
(1) stone is cleaned oven dry
Concrete should be selected scleroid rubble for use, and particle diameter should be at 5～20mm.When the stone aggregate silt content is excessive, can reduce the cohesive strength at concrete cement stone and stone aggregate interface, cause aggregate interface microcrack, thereby can significantly reduce concrete resistance to compression, tensile strength, reduce concrete Young's modulus, influence concrete weather resistance and frost resistance, thereby stone aggregate should adopt stone scrubber to clean oven dry.
(2) stone basic unit face is wrapped up in glue
The tackiness agent parcel is cleaned the stone aggregate of oven dry, stone aggregate shows can form gluing firm basic unit's face, so that fine-fibered silk and stone aggregate surface adhesion anchoring are together taken root, tackiness agent inner wrapped layer and polymer cement mortar jacket layer should have intermiscibility, so that tackiness agent basic unit face that stone aggregate is wrapped up in outward and interfacial agents skin can form integral body effectively.
Building glue mainly contains aqueous epoxy emulsion, formaldehyde polyvinyl acetal water (107 glue), acrylamide glue, aqueous polyvinyl acetate emulsion and VAE emulsion.Wherein the aqueous epoxy emulsion price is more expensive, formaldehyde polyvinyl acetal water (107 glue) though, acrylamide glue has the low advantage of price, has little toxicity.
The VAE emulsion is the abbreviation of vinyl acetate-ethylene copolymerization emulsions, is to be basic raw material with vinyl acetate between to for plastic and vinyl monomer, the macromolecule emulsion that forms by the emulsion polymerisation process copolymerization with other auxiliary material.The VAE emulsion has resistance to acids and bases preferably, the VAE emulsion has good cementability, the VAE emulsion can bond the filler of cheapness and keep enough cohesive forces with very high ratio, it has good adhesive effect to goods such as fiber, timber, paper, plastics film, aluminium foil, cement, potteries.Suggestion stone aggregate primary adhesive adopts the VAE emulsion, adopts the method for spraying and flooding the VAE emulsion, makes the stone aggregate surface form very thin one deck tackiness agent inner wrapped layer, and thickness of thin layer is preferably 20 μ m～30 μ m.
(3) spray microfibre
The effect of microfibre batt is drawknot effect and the cohesive strength that increases stone aggregate and cement stone, thereby improves concrete intensity, and improves concrete deformation performance.Fiber commonly used in the construction work has: glass fibre, steel fiber, carbon fiber, basalt fibre, polyacrylonitrile fibre, polyvinyl alcohol fiber, trevira, tynex and polypropylene fibre, the glass fibre alkali resistance is poor, steel fiber easy-to-rust, conglomeration, carbon fiber is on the high side.
Polypropylene fibre, be to be starting material with the polypropylene, form by the special process manufacturing, the polypropylene technical fiber can be divided into monofilament and netted two kinds of forms, it is a kind of novel concrete reinforced fiber, through special process for treating surface, guaranteed fiber in concrete, have splendid dispersiveness and with the bond stress of cement body, be called as concrete " less important stiffening web ".Polypropylene fibre has abundant raw material, cheap, has advantages such as acidproof, alkaline-resisting.Polypropylene fibre tensile strength is higher, and (300～450MPa), the polypropylene fibre equivalent diameter is little, is generally 18-30 μ m.Therefore, the fiber fur layer of improvement stone aggregate should be selected polypropylene fibre for use.
Adopt the method for spraying polypropylene fibre, spray high-intensity fine synthon to the stone aggregate gluing surface.Stirring on one side has the stone aggregate of tackiness agent basal plane, Yi Bian spray polypropylene fibre, uniform mixing, thus form the gluing fiber fur layer of stone aggregate.
(4) polymer cement mortar is wrapped up in outward
The polymer cement mortar jacket layer should select for use the organic and inorganic polymer cement that combines to starch only as the jacket layer material, polymer cement mortar jacket layer and tackiness agent inner wrapped layer should have good intermiscibility and cohesive force, preferably select for use with a kind of polymer emulsion.Inorganic components in the polymer cement mortar jacket layer should be close with cement stone composition, so that guarantee interface affinity, the cohesive strength of cement stone and improvement stone aggregate.
Organic and the inorganic polymer cement mortar interfacial agents that combines has very high cohesive strength, and polymer cement mortar interfacial agents adhesive tensile resistance intensity generally can reach 2.0～3.0Mpa, can be used as the stone aggregate jacket layer.Inorganic cement mortar interface agent cohesive strength is lower, should not be used as the stone aggregate jacket layer.
The polymer cement mortar jacket layer should be by organic adhesion agent, cement, quartz sand, reactive powder, water reducer, defoamer, water-holding agent, stablizer, materials such as swelling agent are formed, the composition of organic adhesion agent should be selected same kind for use with the tackiness agent inner wrapped layer, in guaranteeing, skin has affinity preferably, cohesive strength, organic adhesion agent mainly contains aqueous epoxy emulsion, formaldehyde polyvinyl acetal water (107 glue), acrylamide glue, aqueous polyvinyl acetate emulsion and VAE emulsion etc., the VAE emulsion is the organic adhesion agent that optimum is used as the polymer cement mortar jacket layer, the VAE emulsion has cohesive strength height, advantages such as nontoxicity; The jacket layer cement composition should be identical with the cement composition of cement stone, the hydration reaction of jacket layer cement generates gelling material, can further bond microfibre, cement stone with the improvement stone aggregate at the interface, the cement clinker of unnecessary not hydration reaction can produce hydration reaction with grout in the jacket layer, strengthens the cohesive force of cement aggregate and cement stone; The reactive powder of jacket layer comprises SILICA FUME, zeolite powder, ground slag and flyash isoreactivity material, can with Ca (OH) at the interface
2Crystal produces pozzolanic reaction, generates gelling material; The admixture of high efficiency water reducing agent can reduce the water content in the mortar interface agent, so that reduce the fine hole and the microscopic checks at interface, naphthalene series high-efficiency water-reducing agent can reduce water consumption 15%～20%, and high-efficiency water-reducing agent of poly-carboxylic acid can reduce water consumption 25%～30%; Defoamer is in order to eliminate the bubble that the organic polymer tackiness agent is produced; Water-holding agent is too fast in order to prevent the organic adhesion agent sclerosis, should select Vltra tears for use; Stablizer is to prevent tackiness agent aged material; Swelling agent adopts aluminium sulfate expanding agent, to prevent polymer mortar jacket layer shrinkage cracking.
The manufacture craft of polymer cement mortar jacket layer can adopt methods such as spraying, brushing and bullet are coated with, and the smearing thickness of jacket layer is preferably 1.0～2.0mm.Add and have the special wooden shot (the gluing quartz sand of surperficial epoxy) on uneven surface, mix the mixed powder that an amount of cement, quartz sand, reactive powder are formed, adopt the improvement stone aggregate that amalgamator will be wrapped up in polymer cement mortar outward to stir, make that improvement stone aggregate surface is crude.
(5) steam press maintenance, storage
The effect of steam press maintenance is the growth of the intensity of accelerate concrete, the inside concrete crack that prevent to shrink, the temperature difference causes.In order to improve the production rate of wrapping up in glue fiber improvement stone aggregate product, in order to accelerate the setting rate of mortar interface agent, should adopt the steam press maintenance measure, to improve the equipment turn-around speed.
The stone aggregate of gluing fibre thin layer is put into steam curing pond (hole), and the quiet 1h～2h that stops slowly is warming up to 90 ℃～100 ℃, and maintenance 4h～8h reaches more than 30～40MPa the strength of cement mortar of stone top layer interfacial agents, can the finished product discharging.Modification stone aggregate behind the steam press maintenance is transported to the warehouse booth, keeps properly, so that use during concrete for making.
(6) application of improvement stone
Improvement stone aggregate of the present utility model generally should be as the stone aggregate of high-strength concrete, and concrete manufacture craft still is a common process.With cement, sand, improvement stone aggregate, high efficiency water reducing agent or add compounds such as flyash, F breeze, slag, SILICA FUME simultaneously, adopt lower water cement ratio, according to rational proportioning, thereby can obtain high-strength concrete.
Novel stone aggregate after the utilization improvement carries out concrete placement, after the concrete knot is hard, advantages such as cement stone and stone aggregate interface have good viscosifying power, and its concrete product has that ultimate compression strength height, non-deformability are strong, good endurance, inhibition alkali-aggregate reaction are effective.Prepared high-strength concrete has being easy to get property of material, normal temperature, common process construction simplicity, advantage such as cheap.
Beneficial effect: the stone aggregate of a kind of wrapped by microfine fibre polymer mortar thin layer of the present utility model, make the stone aggregate interface carry out improved treatment, allow stone aggregate put on " coat " and grow " hair ", so that improvement stone aggregate and cement stone have better cohesive strength and interface affinity, can be used as the improvement stone aggregate of the above extra-high-speed reinforced concrete of preparation C80.Product is made of stone aggregate kernel, tackiness agent inner wrapped layer, polymer cement mortar jacket layer and gluing microfibre batt.Novel stone aggregate after the utilization improvement carries out concrete member and builds, after the concrete knot is hard, cement stone and stone aggregate interface have good viscosifying power, and its concrete product has that ultimate compression strength height, non-deformability are strong, good endurance, inhibition alkali-aggregate reaction are effective, being easy to get property of material, normal temperature construction simplicity, advantage such as cheap.
Tackiness agent inner wrapped layer and stone aggregate are gluing, and firmly the anchoring of microfibre silk is taken root on the tackiness agent inner wrapped layer, and polymer cement mortar jacket layer and tackiness agent inner wrapped layer mix and can effectively form integral body.The improvement stone aggregate has crude physical surface, and the inorganic components that contains in the polymer cement mortar jacket layer is close with cement stone composition, can guarantee interface affinity, the cohesive strength of cement stone and improvement stone aggregate.Reactive powder in the polymer cement mortar jacket layer comprises SILICA FUME, zeolite powder, ground slag and flyash isoreactivity material, can with the Ca (OH) at cement stone interface place
2Crystal produces pozzolanic reaction, generates gelling material, and cement stone the weakest in the concrete and stone aggregate interface have been carried out improved treatment.Therefore, the modification stone aggregate can improve cement stone and stone aggregate viscosifying power at the interface, strengthens ultimate compression strength, non-deformability and the weather resistance of concrete product.The tackiness agent inner wrapped layer wrapped up stone aggregate, stoped the alkali-aggregate reaction of basic ion and stone aggregate in the hydrate.Wrapped by microfine fibre polymer mortar thin layer stone aggregate of the present utility model especially is fit to preparation extra-high-speed reinforced concrete.Compare (adopting quartz sand to replace stone aggregate, strengthen cement consumption, mix steel fiber and steam press maintenance) with UHPC extra-high-speed reinforced concrete, have being easy to get property of material, normal temperature construction simplicity, advantage such as cheap.The improvement complete processing that stone aggregate is wrapped up in the cellulosic polymer mortar thin layer outward has more significant improved effect for the cobble aggregate.
Description of drawings
Fig. 1 is a stone aggregate synoptic diagram of wrapping up in the gluing fiber of slurry;
Have among the figure: stone aggregate kernel 1; Tackiness agent inner wrapped layer 2; Polymer cement mortar jacket layer 3; Gluing microfibre batt 4.
Embodiment
A kind of stone aggregate of wrapped by microfine fibre polymer mortar thin layer, comprise: stone aggregate kernel 1, on the outside surface of stone aggregate kernel 1, be enclosed with tackiness agent inner wrapped layer 2, on the outside surface of tackiness agent inner wrapped layer 2, be enclosed with polymer cement mortar jacket layer 3, be connected with the outside that fiber on gluing microfibre batt 4 and the described gluing microfibre batt 4 extends to polymer cement mortar jacket layer 3 on the described tackiness agent inner wrapped layer 2.
The utility model can adopt following method to make:
Step 1 is cleaned oven dry with stone aggregate kernel 1, the stone aggregate kernel 1 that maybe will clean oven dry at stone aggregate kernel 1 surface sprinkling organic adhesion agent is immersed in the organic adhesion agent, thereby forming a layer thickness on stone aggregate kernel 1 surface is the tackiness agent inner wrapped layer 2 of 20 μ m～30 μ m
Step 2 stirs on one side and has the stone aggregate of tackiness agent, Yi Bian spray microfibre, uniform mixing, thus form the gluing microfibre batt 4 of stone aggregate,
Step 3 polymer cement mortar jacket layer 3 selects for use the organic and inorganic polymer cement that combines to starch only as the jacket layer material, adopts spraying or brushing method, and the clean slurry of polymer cement is covered in the surface to be had on the stone aggregate kernel 1 of tackiness agent inner wrapped layer 2,
Step 4 will be put into the steam curing pond by the stone aggregate that step 3 obtains, the quiet 1h that stops, in 1h, slowly be warming up to 90 ℃～100 ℃, keep 90 ℃～100 ℃, maintenance 6h slowly is cooled to normal temperature in 1h, through after the vapor cure, the strength of cement mortar of stone top layer interfacial agents reaches more than the 40MPa, can obtain the stone aggregate of wrapped by microfine fibre polymer mortar thin layer.
Described organic adhesion agent is the VAE vinyl acetate-ethylene copolymerization emulsions.
Described microfibre is a polypropylene fibre.
Described its composition of polymer interface agent, proportioning are flyash: 10-20%, silica flour 5-10%, sand: 30-40%, cement: 30-40%, latex powder: 5.0-7.0%, water-holding agent: 0.1-0.5%, defoamer: 0.05-0.10%, high-efficiency water-reducing agent of poly-carboxylic acid 0.5-1.0%, and water/gelling material compares 0.15-0.27.
Claims (1)
1. the stone aggregate of a wrapped by microfine fibre polymer mortar thin layer, comprise: stone aggregate kernel (1), it is characterized in that, on the outside surface of stone aggregate kernel (1), be enclosed with tackiness agent inner wrapped layer (2), on the outside surface of tackiness agent inner wrapped layer (2), be enclosed with polymer cement mortar jacket layer (3), be connected with the outside that fiber on gluing microfibre batt (4) and the described gluing microfibre batt (4) extends to polymer cement mortar jacket layer (3) on the described tackiness agent inner wrapped layer (2).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010202306729U CN201694960U (en) | 2010-06-21 | 2010-06-21 | Stone aggregate wrapped by micro-fiber polymer mortar thin layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2010202306729U CN201694960U (en) | 2010-06-21 | 2010-06-21 | Stone aggregate wrapped by micro-fiber polymer mortar thin layer |
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| CN201694960U true CN201694960U (en) | 2011-01-05 |
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| CN2010202306729U Expired - Lifetime CN201694960U (en) | 2010-06-21 | 2010-06-21 | Stone aggregate wrapped by micro-fiber polymer mortar thin layer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101863631A (en) * | 2010-06-21 | 2010-10-20 | 东南大学 | Stone aggregate wrapped by microfine fibre polymer mortar thin layer and preparation method thereof |
| CN112479616A (en) * | 2020-11-23 | 2021-03-12 | 湖南大学 | Recycled coarse aggregate wrapped with powder and preparation method thereof |
-
2010
- 2010-06-21 CN CN2010202306729U patent/CN201694960U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101863631A (en) * | 2010-06-21 | 2010-10-20 | 东南大学 | Stone aggregate wrapped by microfine fibre polymer mortar thin layer and preparation method thereof |
| CN101863631B (en) * | 2010-06-21 | 2012-01-04 | 东南大学 | Stone aggregate wrapped by microfine fibre polymer mortar thin layer and preparation method thereof |
| CN112479616A (en) * | 2020-11-23 | 2021-03-12 | 湖南大学 | Recycled coarse aggregate wrapped with powder and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110105 Effective date of abandoning: 20120104 |