CN106396597A - Alkali excited fly ash repairing mortar and production method thereof - Google Patents
Alkali excited fly ash repairing mortar and production method thereof Download PDFInfo
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- CN106396597A CN106396597A CN201610767578.9A CN201610767578A CN106396597A CN 106396597 A CN106396597 A CN 106396597A CN 201610767578 A CN201610767578 A CN 201610767578A CN 106396597 A CN106396597 A CN 106396597A
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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
- C04B28/24—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 alkyl, ammonium or metal silicates; containing silica sols
- C04B28/26—Silicates of the alkali metals
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
- C04B18/08—Flue dust, i.e. fly ash
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/72—Repairing or restoring existing buildings or building materials
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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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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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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- Environmental & Geological Engineering (AREA)
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- Civil Engineering (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses an alkali excited fly ash repairing mortar and a production method thereof. The mortar comprises, by weight, 30-50 parts of fly ash, 1-10 parts of metakaolin, 1-10 parts of cement, 40-60 parts of sands, 10-15 parts of sodium silicate, 2-4 parts of sodium hydroxide, 0.8-1.2 parts of re-dispersible latex powder, 0.02-0.04 parts of a water retaining agent, 0.02-0.04 parts of short fibers and 0.5-1 part of a plasticizer. The mortar has the characteristics of good construction performance, fast hardening, slow setting, good bearing performance, high caking property and small shrinkage deformation, and also has the advantages of great saving of cement and other nonrenewable resources, low energy consumption, realization of massive treatment of fly ash and other industrial waste resources, and changing of wastes into valuables.
Description
Technical field
The present invention relates to mending mortar field, particularly to a kind of alkali-activated carbonatite flyash mending mortar and preparation method thereof.
Background technology
Concrete and reinforced concrete is widely used in various fields as main construction material, and concrete structures exist
Occurred by the erosion of Korrosionsmedium during use to destroy or the example of seepage is of common occurrence, many is in wet environment or industry
Concrete under environment is presenting the sign by corrosion failure.Many civil buildings are in the such as toilet, underground of moist position
Usually Seepage in room, elevator and box foundation etc., in nonferrous metallurgy, chemistry, papermaking and other industrial undertaking,
20%～70% concrete structures are subject to the effect of various Korrosionsmediums to cause structural material to corrode, the municipal administration in city
Also breakage because of long-term corrosion in job facilities such as viaduct, bridge and some water conservancy projects.In recent years, concrete under water
In bridge deck concrete, use normal concrete or mortar due to during construction, during life-time service, by heavy burden
The impact of the factors such as load, freeze-thaw cycle, the infiltration of chloride ion, surface abrasion, many concrete occur in that cracking, peeling, hollowing
Etc. phenomenon, greatly have impact on the service life of engineering, and the repairing of the engineering to this kind of destruction, also become highway and city's political and ideological work
The a great problem of journey.
The reason concrete repair failure, the overwhelming majority is because that new-old concrete (mortar) comes off at interface and leads to repair
Mend unsuccessfully.100～200um transition zone of novel concrete or mortar is bonding interface weak floor, this layer be rich in pore, crack,
Moisture film and entringite and the thick crystal of calcium hydroxide, and this crystal intensity is poor, is to repair the big key factor losing efficacy.Elasticity
The relatively low material deformation of modulus is bigger, necessarily causes transition region stress concentration, if transition region does not have under the constraint of another phase
There is enough intensity, no matter the elastic modelling quantity of patching material is high or low all can come off when deformation is accumulated to a certain extent.Right
In the mechanical property of patching material, general requirement must not be less than the even above resistance to compression of base material, anti-folding, tensile strength；With base material
Have and enough cohere anti-folding and Shear bond strength；And elastic modelling quantity and linear expansion coefficient close with base material.
Chinese Patent Application No. is 201510156389.3, and the patent documentation of Publication No. CN 104844078A discloses
A kind of polymer mending mortar, its raw material components and component are as follows：Cement：400 parts～500 parts, 500～600 parts of quartz sand is high
Molecularly Imprinted Polymer：1 part～5 parts, polymer：5 parts～15 parts, SILICA FUME：1 part～5 parts, wood fibre：0.1～0.3 part, wherein
Described high molecular polymer is cellulose ether, and described polymer is redispersable latex powder.It is an object of the invention to provide one
Plant long service life, indehiscent polymer mending mortar and preparation method thereof.But this polymer mending mortar is used gelling
Material is cement, and no other admixtures or filler are relatively costly, there is later stage shrinkage cracking risk, and do not have Early strength quick-setting
Characteristic.
And for example Chinese Patent Application No. is 201410699106.5, and the patent documentation of Publication No. CN 104478324A is public
Open a kind of resistant to elevated temperatures geopolymer base reinforcing and repairing mortar and preparation method and application.Preparation method includes following step
Suddenly：By metakaolin and flyash pressed powder, chopped strand mixing, pour KP1 solution into, add sand after stirring, then stir
Product is obtained after mixing；Each component is metakaolin and 100 parts of flyash pressed powder by mass, KP1 solution 90～
130 parts, 300～500 parts of sand, 0～2 part of chopped strand；Pressed powder is grouped into by the group of following mass percent：Metakaolin
50～80%, flyash 20～50%.Material of the present invention is respectively provided with good mechanical property at ambient and elevated temperatures, especially with
Conventional cement mortar, concrete and fiber mesh etc. have stronger cementitiousness, and room temperature shrinks little, with concrete heat expansion
Coefficient is close, and early by force it is not easy to cracking, heat-proof quality is good, and environmental protection, is suitable as the reinforcing and repairing of xoncrete structure
Mortar.But this mending mortar cement mortar rate is less, and no plasticiser or water reducer, easily cause slurry and coagulate soon and cannot construct；Partially
Kaolin consumption is big, relatively costly, and easily causes later strength retroversion.
The information being disclosed in this background section is merely intended to increase the understanding of the general background to the present invention, and should not
Recognize when being considered or imply in any form that this information structure has been the prior art well known to persons skilled in the art.
Content of the invention
It is an object of the invention to provide a kind of alkali-activated carbonatite flyash mending mortar and preparation method thereof, thus overcoming existing
The shortcomings of mending mortar cement consumption is big, workability is poor and contraction distortion is big.
For achieving the above object, according to an aspect of the present invention, there is provided a kind of alkali-activated carbonatite flyash mending mortar, by weight
Part ratio comprises following components：30～50 parts of flyash, 1～10 part of metakaolin, 1～10 part of cement, 40～60 parts of sand, sodium silicate
10～15 parts, 2～4 parts of sodium hydroxide, 0.8～1.2 part of redispersable latex powder, 0.02～0.04 part of water-retaining agent, chopped fiber
0.02～0.04 part and 0.5～1 part of plasticiser.
Preferably, in technique scheme, in described flyash, contain SiO2、Al2O3And Fe2O3Measure as 72%～85%, contain
Calcium amount is less than 10%；The particle diameter of described flyash is less than 75um.
Preferably, in technique scheme, the particle diameter of described dicalcium powder is 200～400 mesh；Described sand is that 40～70 mesh dry
Dry river sand, 70～140 mesh dry one or more of fluvial sand, 40～70 mesh quartz sands and 70～140 mesh quartz sands.
Preferably, in technique scheme, described redispersable latex powder comprises following components by weight：Acetic acid second
3～5 parts of alkene ester, 3～5 parts of ethylene, 3～5 parts of acrylate, 1～2 part of polyvinyl alcohol, 1～2 part of tertiary ethylene carbonate, styrene
1～2 part, 1～2 part of white carbon and silica 1～2 part.
Preferably, in technique scheme, described redispersable latex powder is vinylacetate and ethylene copolymer rubber powder, second
Alkene, vinyl chloride and vinyl laurate ternary polymerization rubber powder, vinylacetate, ethylene and higher aliphatic vinyl acetate ternary polymerization
Rubber powder, vinylacetate and high-grade aliphatic ester copolymerization rubber powder, acrylate and styrene copolymerized rubber powder, vinylacetate, third
Olefin(e) acid ester and higher aliphatic vinyl acetate ternary polymerization rubber powder, vinylacetate homopolymerization rubber powder, styrene and butadiene copolymer glue
One of powder.
Preferably, in technique scheme, described water-retaining agent is one of cellulose ether and starch ether or two kinds, wherein
Described cellulose ether is one or two of hydroxypropyl methyl cellulose ether and ethoxyl methyl cellulose ether.
Preferably, in technique scheme, described cement is Portland cement, portland slag cement or comprehensive silicon
One of acid salt cement.
Preferably, in technique scheme, described chopped fiber be alkali resistant glass fiber, polypropylene, polyacrylonitrile fibre and
One or more of vinal.
Preferably, in technique scheme, described plasticiser is powder shaped cationic polycarboxylate water-reducer.
For achieving the above object, according to a further aspect of the invention, there is provided a kind of system of alkali-activated carbonatite flyash mending mortar
Preparation Method, specifically includes：By flyash, metakaolin, cement, sodium silicate, sodium hydroxide, redispersable latex powder, water-retaining agent,
After plasticiser, chopped strand and plasticiser are according to stoichiometry, in dry mixing device, mixing 3～5min obtains final product mending mortar.
Compared with prior art, the present invention has the advantages that：
What the present invention provided alkali-activated carbonatite flyash mending mortar and preparation method thereof, have have good workability, hard soon and
Not rapid hardening, the features such as load-carrying properties are good, cohesiveness is strong, contraction distortion is little, cement etc. can be greatlyd save non-renewable simultaneously
Resource, energy consumption is low, simultaneously can the trade waste resource such as treated coal ash in a large number, turn waste into wealth.
Specific embodiment
Specific embodiment with reference to the present invention is described in detail, it is to be understood that protection scope of the present invention is simultaneously
Do not limited by specific embodiment.
Explicitly indicate that unless otherwise other, otherwise in entire disclosure and claims, term " inclusion " or its change
Change such as "comprising" or " including " etc. and will be understood to comprise statement ingredient, and do not exclude other ingredients.
Comparative example 1：
A kind of alkali-activated carbonatite flyash mending mortar, comprises following components by weight：50 parts of flyash, metakaolin 10
Part, 10 parts of cement, 60 parts of sand, 4 parts of sodium hydroxide, 0.04 part of water-retaining agent, 0.04 part of chopped fiber and 1 part of plasticiser.
In this comparative example, the particle diameter of flyash is less than 75um, contains SiO in flyash2、Al2O3And Fe2O3Measure as 85%, contain
Calcium amount is less than 10%, belongs to F level flyash, and its loss on ignition is less than 10%, mostlys come from burning smoke coal-fired plant, boiler factory etc.；Weight
The particle diameter of calcium powder is 200～400 mesh；Sand is that 40～70 mesh dry fluvial sand, 70～140 mesh dry fluvial sand, 40～70 mesh quartz sands
Mixture with 70～140 mesh quartz sands.
In this comparative example, water-retaining agent be cellulose ether and starch ether wait mass mixing thing, wherein cellulose ether is hydroxypropyl
The mixture of the quality such as ylmethyl cellulose ether and ethoxyl methyl cellulose ether, its viscosity probably 40000mPa.s～
75000mPa.s between；Cement is portland slag cement, and strength of cement grade is 42.5,42.5R, 52.5, in 52.5R one
Kind；Chopped fiber is the mixture of the quality such as alkali resistant glass fiber, polypropylene, polyacrylonitrile fibre and vinal, length
It is 6～12mm；Plasticiser is powder shaped cationic polycarboxylate water-reducer.
In this comparative example, the preparation method of alkali-activated carbonatite flyash mending mortar, specifically includes：By flyash, metakaolin,
After cement, sodium hydroxide, water-retaining agent, plasticiser, chopped strand and plasticiser are according to stoichiometry, mix 3 in dry mixing device
～5min obtains final product mending mortar, during use, adds mending mortar quality 17～19% clear water mix and blend 2～3min can apply
Work.
Embodiment 1：
A kind of alkali-activated carbonatite flyash mending mortar, comprises following components by weight：30 parts of flyash, metakaolin 1
Part, 1 part of cement, 40 parts of sand, 10 parts of sodium silicate, 2 parts of sodium hydroxide, 0.8 part of redispersable latex powder, 0.02 part of water-retaining agent, short
0.02 part of fiber and 0.5 part of plasticiser.
In this embodiment, the particle diameter of flyash is less than 75um, contains SiO in flyash2、Al2O3And Fe2O3Measure as 72%, contain
Calcium amount is less than 10%, belongs to F level flyash, and its loss on ignition is less than 10%, mostlys come from burning smoke coal-fired plant, boiler factory etc.；Weight
The particle diameter of calcium powder is 200～400 mesh；Sand is that 40～70 mesh dry fluvial sand.
In this embodiment preferably, redispersable latex powder is vinylacetate and ethylene copolymer rubber powder；Water-retaining agent is fibre
The plain ether of dimension, wherein cellulose ether is hydroxypropyl methyl cellulose ether, and viscosity is between 40000mPa.s～75000mPa.s；Cement
For Portland cement, strength of cement grade is 42.5,42.5R, 52.5, one of 52.5R；Chopped fiber is alkali resistant glass
Fiber, length is 6～12mm；Plasticiser is powder shaped cationic polycarboxylate water-reducer.
In this embodiment, the preparation method of alkali-activated carbonatite flyash mending mortar, specifically includes：By flyash, metakaolin,
Cement, sodium silicate, sodium hydroxide, redispersable latex powder, water-retaining agent, plasticiser, chopped strand and plasticiser are according to proportioning meter
After amount, in dry mixing device, mixing 3～5min obtains final product mending mortar, during use, adds mending mortar quality 17～19% clear water
Mix and blend 2～3min can construct.
What deserves to be explained is, the sand in this embodiment can with 70～140 mesh dry fluvial sand, 40～70 mesh quartz sands and 70～
One of 140 mesh quartz sands replace；Chopped fiber can be by one of polypropylene, polyacrylonitrile fibre and vinal generation
Replace；Redispersable latex powder can be substituted by vinylacetate homopolymerization rubber powder；Water-retaining agent available starches ether replaces.
By the mortar in this alkali-activated carbonatite flyash mending mortar and comparative example 1 carry out application property, adhesion strength setting time,
The performance such as contract with dry rate and rupture strength is tested, and test result is shown in Table 1：
This mending mortar of table 1 and the performance test results of comparative example 1：
| Detection project | Design load | Embodiment 1 testing result | Comparative example 1 testing result |
| Application property | Not sagging within viscous spatula, 35mm | Not sagging within viscous spatula, 35mm | Sagging within viscous spatula, 35mm |
| Setting time (min) | ≥50 | 86 | 50 |
| 14d adhesive strength (MPa) | ≥1.0 | 1.46 | 0.9 |
| 28d contract with dry rate (%) | ≤0.15 | 0.07 | 0.16 |
| 4h rupture strength (MPa) | ≥2 | 3.8 | 1.9 |
| 1d rupture strength (MPa) | ≥4 | 6.5 | 3.8 |
| 28d rupture strength (MPa) | ≥7 | 11.2 | 6 |
As known from Table 1, this Binder Materials indices is superior to comparative example 1, have have good workability, firmly and not fast soon
Solidifying, the features such as load-carrying properties are good, cohesiveness is strong, contraction distortion is little, the nonrenewable resourceses such as cement can be greatlyd save simultaneously,
Energy consumption is low, simultaneously can the trade waste resource such as treated coal ash in a large number, turn waste into wealth.
Embodiment 2：
A kind of alkali-activated carbonatite flyash mending mortar, comprises following components by weight：50 parts of flyash, metakaolin 10
Part, 10 parts of cement, 60 parts of sand, 15 parts of sodium silicate, 4 parts of sodium hydroxide, 1.2 parts of redispersable latex powder, 0.04 part of water-retaining agent, short
0.04 part of fiber and 1 part of plasticiser.
In this embodiment, the particle diameter of flyash is less than 75um, contains SiO in flyash2、Al2O3And Fe2O3Measure as 85%, contain
Calcium amount is less than 10%, belongs to F level flyash, and its loss on ignition is less than 10%, mostlys come from burning smoke coal-fired plant, boiler factory etc.；Weight
The particle diameter of calcium powder is 200～400 mesh；Sand is that 40～70 mesh dry fluvial sand, 70～140 mesh dry fluvial sand, 40～70 mesh quartz sands
Mixture with 70～140 mesh quartz sands.
In this embodiment preferably, redispersable latex powder is ethylene, vinyl chloride and vinyl laurate ternary polymerization glue
Powder；Water-retaining agent be wait fine fiber element ether and starch ether mixture, wherein cellulose ether be etc. quality hydroxypropyl methyl fiber
Plain ether and the mixture of ethoxyl methyl cellulose ether, its viscosity is probably between 40000mPa.s～75000mPa.s；Cement
For portland slag cement, strength of cement grade is 42.5,42.5R, 52.5, one of 52.5R；Chopped fiber is to wait mass reactance
The mixture of alkali containing glass fibre, polypropylene, polyacrylonitrile fibre and vinal, length is 6～12mm；Plasticiser is
Powder shaped cationic polycarboxylate water-reducer.
In this embodiment, the preparation method of alkali-activated carbonatite flyash mending mortar, specifically includes：By flyash, metakaolin,
Cement, sodium silicate, sodium hydroxide, redispersable latex powder, water-retaining agent, plasticiser, chopped strand and plasticiser are according to proportioning meter
After amount, in dry mixing device, mixing 3～5min obtains final product mending mortar, during use, adds mending mortar quality 17～19% clear water
Mix and blend 2～3min can construct.
What deserves to be explained is, in this embodiment, redispersable latex powder can be by ethylene, vinyl chloride and vinyl laurate three
First copolymerization rubber powder, vinylacetate, ethylene and higher aliphatic vinyl acetate ternary polymerization rubber powder, vinylacetate and higher aliphatic
Acid esters copolymerization rubber powder, acrylate and styrene copolymerized rubber powder, vinylacetate, acrylate and higher aliphatic vinyl acetate three
First copolymerization rubber powder, styrene and one of butadiene copolymer rubber powder replacement.
By the mortar in this alkali-activated carbonatite flyash mending mortar and comparative example 1 carry out application property, adhesion strength setting time,
The performance such as contract with dry rate and rupture strength is tested, and test result is shown in Table 2：
This mending mortar of table 2 and the performance test results of comparative example 1：
As known from Table 2, this Binder Materials indices is superior to comparative example 1, have have good workability, firmly and not fast soon
Solidifying, the features such as load-carrying properties are good, cohesiveness is strong, contraction distortion is little, the nonrenewable resourceses such as cement can be greatlyd save simultaneously,
Energy consumption is low, simultaneously can the trade waste resource such as treated coal ash in a large number, turn waste into wealth.
Embodiment 3：
A kind of alkali-activated carbonatite flyash mending mortar, comprises following components by weight：40 parts of flyash, metakaolin 5
Part, 5 parts of cement, 50 parts of sand, 12 parts of sodium silicate, 3 parts of sodium hydroxide, 1 part of redispersable latex powder, 0.03 part of water-retaining agent, short fibre
0.03 part of dimension and 0.8 part of plasticiser.
In this embodiment, the particle diameter of flyash is less than 75um, contains SiO in flyash2、Al2O3And Fe2O3Measure as 80%, contain
Calcium amount is less than 10%, belongs to F level flyash, and its loss on ignition is less than 10%, mostlys come from burning smoke coal-fired plant, boiler factory etc.；Weight
The particle diameter of calcium powder is 200～400 mesh；Sand is the mixture that 70～140 mesh dry fluvial sand and 40～70 mesh quartz sands.
In this embodiment preferably, redispersable latex powder is vinylacetate, ethylene and higher aliphatic vinyl acetate three
First copolymerization rubber powder；Water-retaining agent be wait fine fiber element ether and starch ether mixture, wherein cellulose ether be etc. quality ethoxy
The mixture of methyl cellulose ether, its viscosity is probably between 40000mPa.s～75000mPa.s；Cement is composition silicate
Cement, strength of cement grade is 42.5,42.5R, 52.5, one of 52.5R；Chopped fiber be etc. quality polyacrylonitrile fibre and
The mixture of vinal, length is 6～12mm；Plasticiser is powder shaped cationic polycarboxylate water-reducer.
In this embodiment, the preparation method of alkali-activated carbonatite flyash mending mortar, specifically includes：By flyash, metakaolin,
Cement, sodium silicate, sodium hydroxide, redispersable latex powder, water-retaining agent, plasticiser, chopped strand and plasticiser are according to proportioning meter
After amount, in dry mixing device, mixing 3～5min obtains final product mending mortar, during use, adds mending mortar quality 17～19% clear water
Mix and blend 2～3min can construct.
By the mortar in this alkali-activated carbonatite flyash mending mortar and comparative example 1 carry out application property, adhesion strength setting time,
The performance such as contract with dry rate and rupture strength is tested, and test result is shown in Table 3：
This mending mortar of table 3 and the performance test results of comparative example 1：
| Detection project | Design load | Embodiment 3 testing result | Comparative example 1 testing result |
| Application property | Not sagging within viscous spatula, 35mm | Not sagging within viscous spatula, 35mm | Sagging within viscous spatula, 35mm |
| Setting time (min) | ≥50 | 73 | 50 |
| 14d adhesive strength (MPa) | ≥1.0 | 1.29 | 0.9 |
| 28d contract with dry rate (%) | ≤0.15 | 0.06 | 0.16 |
| 4h rupture strength (MPa) | ≥2 | 3.3 | 1.9 |
| 1d rupture strength (MPa) | ≥4 | 6.2 | 3.8 |
| 28d rupture strength (MPa) | ≥7 | 10.5 | 6 |
As known from Table 3, this Binder Materials indices is superior to comparative example 1, have have good workability, firmly and not fast soon
Solidifying, the features such as load-carrying properties are good, cohesiveness is strong, contraction distortion is little, the nonrenewable resourceses such as cement can be greatlyd save simultaneously,
Energy consumption is low, simultaneously can the trade waste resource such as treated coal ash in a large number, turn waste into wealth.
Embodiment 4：
A kind of alkali-activated carbonatite flyash mending mortar, comprises following components by weight：30 parts of flyash, metakaolin 1
Part, 1 part of cement, 40 parts of sand, 10 parts of sodium silicate, 2 parts of sodium hydroxide, 0.8 part of redispersable latex powder, 0.02 part of water-retaining agent, short
0.02 part of fiber and 0.5 part of plasticiser.
In this embodiment, the particle diameter of flyash is less than 75um, contains SiO in flyash2、Al2O3And Fe2O3Measure as 72%, contain
Calcium amount is less than 10%, belongs to F level flyash, and its loss on ignition is less than 10%, mostlys come from burning smoke coal-fired plant, boiler factory etc.；Weight
The particle diameter of calcium powder is 200～400 mesh；Sand is that 40～70 mesh dry fluvial sand.
In this embodiment preferably, comprise following components by weight：3 parts of vinylacetate, 3 parts of ethylene, acrylic acid
3 parts of ester, 1 part of polyvinyl alcohol, 1 part of tertiary ethylene carbonate, 1 part of styrene, 1 part of white carbon and silica 1 part, by above-mentioned raw materials
Uniformly mix；Water-retaining agent is cellulose ether, and wherein cellulose ether is hydroxypropyl methyl cellulose ether, and viscosity exists
40000mPa.s between～75000mPa.s；Cement be Portland cement, strength of cement grade be 42.5,42.5R,
52.5th, one of 52.5R；Chopped fiber is alkali resistant glass fiber, and length is 6～12mm；Plasticiser is powder shaped cationic
Polycarboxylate water-reducer.
In this embodiment, the preparation method of alkali-activated carbonatite flyash mending mortar, specifically includes：By flyash, metakaolin,
Cement, sodium silicate, sodium hydroxide, redispersable latex powder, water-retaining agent, plasticiser, chopped strand and plasticiser are according to proportioning meter
After amount, in dry mixing device, mixing 3～5min obtains final product mending mortar, during use, adds mending mortar quality 17～19% clear water
Mix and blend 2～3min can construct.
By the mortar in this alkali-activated carbonatite flyash mending mortar and comparative example 1 carry out application property, adhesion strength setting time,
The performance such as contract with dry rate and rupture strength is tested, and test result is shown in Table 4：
This mending mortar of table 4 and the performance test results of comparative example 1：
| Detection project | Design load | Embodiment 4 testing result | Comparative example 1 testing result |
| Application property | Not sagging within viscous spatula, 35mm | Not sagging within viscous spatula, 35mm | Sagging within viscous spatula, 35mm |
| Setting time (min) | ≥50 | 90 | 50 |
| 14d adhesive strength (MPa) | ≥1.0 | 1.53 | 0.9 |
| 28d contract with dry rate (%) | ≤0.15 | 0.05 | 0.16 |
| 4h rupture strength (MPa) | ≥2 | 4.3 | 1.9 |
| 1d rupture strength (MPa) | ≥4 | 7.4 | 3.8 |
| 28d rupture strength (MPa) | ≥7 | 11.8 | 6 |
As known from Table 4, this Binder Materials indices is superior to comparative example 1, have have good workability, firmly and not fast soon
Solidifying, the features such as load-carrying properties are good, cohesiveness is strong, contraction distortion is little, the nonrenewable resourceses such as cement can be greatlyd save simultaneously,
Energy consumption is low, simultaneously can the trade waste resource such as treated coal ash in a large number, turn waste into wealth.
Embodiment 5：
A kind of alkali-activated carbonatite flyash mending mortar, comprises following components by weight：50 parts of flyash, metakaolin 10
Part, 10 parts of cement, 60 parts of sand, 15 parts of sodium silicate, 4 parts of sodium hydroxide, 1.2 parts of redispersable latex powder, 0.04 part of water-retaining agent, short
0.04 part of fiber and 1 part of plasticiser.
In this embodiment, the particle diameter of flyash is less than 75um, contains SiO in flyash2、Al2O3And Fe2O3Measure as 85%, contain
Calcium amount is less than 10%, belongs to F level flyash, and its loss on ignition is less than 10%, mostlys come from burning smoke coal-fired plant, boiler factory etc.；Weight
The particle diameter of calcium powder is 200～400 mesh；Sand is that 40～70 mesh dry fluvial sand, 70～140 mesh dry fluvial sand, 40～70 mesh quartz sands
Mixture with 70～140 mesh quartz sands.
In this embodiment preferably, redispersable latex powder comprises following components by weight：5 parts of vinylacetate,
5 parts of ethylene, 5 parts of acrylate, 2 parts of polyvinyl alcohol, 2 parts of tertiary ethylene carbonate, 2 parts of styrene, 2 parts of white carbon and silicon dioxide
2 parts, above-mentioned raw materials are mixed；Water-retaining agent is the mixture waiting fine fiber element ether and starch ether, and wherein cellulose ether is
Etc. the mixture of quality hydroxypropyl methyl cellulose ether and ethoxyl methyl cellulose ether, its viscosity probably 40000mPa.s～
75000mPa.s between；Cement is portland slag cement, and strength of cement grade is 42.5,42.5R, 52.5, in 52.5R one
Kind；Chopped fiber such as is at the mixture of quality alkali resistant glass fiber, polypropylene, polyacrylonitrile fibre and vinal, length
It is 6～12mm；Plasticiser is powder shaped cationic polycarboxylate water-reducer.
In this embodiment, the preparation method of alkali-activated carbonatite flyash mending mortar, specifically includes：By flyash, metakaolin,
Cement, sodium silicate, sodium hydroxide, redispersable latex powder, water-retaining agent, plasticiser, chopped strand and plasticiser are according to proportioning meter
After amount, in dry mixing device, mixing 3～5min obtains final product mending mortar, during use, adds mending mortar quality 17～19% clear water
Mix and blend 2～3min can construct.
By the mortar in this alkali-activated carbonatite flyash mending mortar and comparative example 1 carry out application property, adhesion strength setting time,
The performance such as contract with dry rate and rupture strength is tested, and test result is shown in Table 4：
This mending mortar of table 5 and the performance test results of comparative example 1：
| Detection project | Design load | Embodiment 5 testing result | Comparative example 1 testing result |
| Application property | Not sagging within viscous spatula, 35mm | Not sagging within viscous spatula, 35mm | Sagging within viscous spatula, 35mm |
| Setting time (min) | ≥50 | 84 | 50 |
| 14d adhesive strength (MPa) | ≥1.0 | 1.53 | 0.9 |
| 28d contract with dry rate (%) | ≤0.15 | 0.03 | 0.16 |
| 4h rupture strength (MPa) | ≥2 | 3.3 | 1.9 |
| 1d rupture strength (MPa) | ≥4 | 6.8 | 3.8 |
| 28d rupture strength (MPa) | ≥7 | 11.7 | 6 |
As known from Table 5, this Binder Materials indices is superior to comparative example 1, have have good workability, firmly and not fast soon
Solidifying, the features such as load-carrying properties are good, cohesiveness is strong, contraction distortion is little, the nonrenewable resourceses such as cement can be greatlyd save simultaneously,
Energy consumption is low, simultaneously can the trade waste resource such as treated coal ash in a large number, turn waste into wealth.
The description of the aforementioned specific illustrative embodiment to the present invention illustrate that and illustration purpose.These descriptions
It is not wishing to limit the invention to disclosed precise forms, and it will be apparent that according to above-mentioned teaching, can much be changed
And change.The purpose of selecting and describing the exemplary embodiment is that explaining that the certain principles of the present invention and its reality should
With so that those skilled in the art be capable of and utilize the present invention various different exemplary and
Various different selections and change.The scope of the present invention is intended to be limited by claims and its equivalents.
Claims (10)
1. a kind of alkali-activated carbonatite flyash mending mortar is it is characterised in that comprise following components by weight：Flyash 30～50
Part, 1～10 part of metakaolin, 1～10 part of cement, 40～60 parts of sand, 10～15 parts of sodium silicate, 2～4 parts of sodium hydroxide, can be again
0.8～1.2 part of dispersed latex powder, 0.02～0.04 part of water-retaining agent, 0.02～0.04 part of chopped fiber and 0.5～1 part of plasticiser.
2. alkali-activated carbonatite flyash mending mortar according to claim 1 is it is characterised in that contain SiO in described flyash2、
Al2O3And Fe2O3Measure as 72%～85%, calcium content is less than 10%；The particle diameter of described flyash is less than 75um.
3. alkali-activated carbonatite flyash mending mortar according to claim 1 is it is characterised in that the particle diameter of described dicalcium powder is
200～400 mesh；Described sand is that 40～70 mesh dry fluvial sand, 70～140 mesh dry fluvial sand, 40～70 mesh quartz sands and 70～140
One or more of mesh quartz sand.
4. alkali-activated carbonatite flyash mending mortar according to claim 1 is it is characterised in that described redispersable latex powder is pressed
Weight part ratio comprises following components：3～5 parts of vinylacetate, 3～5 parts of ethylene, 3～5 parts of acrylate, polyvinyl alcohol 1～2
Part, 1～2 part of tertiary ethylene carbonate, 1～2 part of styrene, 1～2 part of white carbon and silica 1～2 part.
5. alkali-activated carbonatite flyash mending mortar according to claim 1 is it is characterised in that described redispersable latex powder is
Vinylacetate and ethylene copolymer rubber powder, ethylene, vinyl chloride and vinyl laurate ternary polymerization rubber powder, vinylacetate, second
Alkene and higher aliphatic vinyl acetate ternary polymerization rubber powder, vinylacetate and high-grade aliphatic ester copolymerization rubber powder, acrylate with
Styrene copolymerized rubber powder, vinylacetate, acrylate and higher aliphatic vinyl acetate ternary polymerization rubber powder, vinylacetate is equal
One of poly- rubber powder, styrene and butadiene copolymer rubber powder.
6. alkali-activated carbonatite flyash mending mortar according to claim 1 is it is characterised in that described water-retaining agent is cellulose ether
With one of starch ether or two kinds, wherein said cellulose ether is hydroxypropyl methyl cellulose ether and hydroxyethylmethyl-cellulose
Ether one or two.
7. alkali-activated carbonatite flyash mending mortar according to claim 1 is it is characterised in that described cement is normal silicate
One of cement, portland slag cement or composite Portland cement.
8. alkali-activated carbonatite flyash mending mortar according to claim 1 is it is characterised in that described chopped fiber is alkali resistant glass
One or more of fiber, polypropylene, polyacrylonitrile fibre and vinal.
9. alkali-activated carbonatite flyash mending mortar according to claim 1 is it is characterised in that described plasticiser is powder shaped sun
Ion-type polycarboxylate water-reducer.
10. a kind of preparation method based on the alkali-activated carbonatite flyash mending mortar described in claim 1 is it is characterised in that concrete
Including：By flyash, metakaolin, cement, sodium silicate, sodium hydroxide, redispersable latex powder, water-retaining agent, plasticiser, it is chopped
After fiber and plasticiser are according to stoichiometry, in dry mixing device, mixing 3～5min obtains final product mending mortar.
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