CN106316294B - A kind of Reactive Powder Concrete and preparation method thereof and purposes - Google Patents
A kind of Reactive Powder Concrete and preparation method thereof and purposes Download PDFInfo
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- CN106316294B CN106316294B CN201610715837.3A CN201610715837A CN106316294B CN 106316294 B CN106316294 B CN 106316294B CN 201610715837 A CN201610715837 A CN 201610715837A CN 106316294 B CN106316294 B CN 106316294B
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- coupling agent
- reactive powder
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- powder concrete
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Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
-
- 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
-
- 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
Abstract
The present invention provides a kind of Reactive Powder Concrete and preparation method thereof and purposes, which includes the following raw material: 400 ~ 1000 parts of cement, modified 100 ~ 500 parts of Ultramicro-powder, modified 50 ~ 200 parts of steel fibre, 900 ~ 1300 parts of quartz sand, 100 ~ 220 parts of silica flour, 10 ~ 30 parts of additive, 100 ~ 250 parts of water.The present invention is equal to the characteristic of neighbouring interatomic force according to inorganic crystal whisker non-nuclear density gauge, crystal intensity close to theoretical value, the mechanical strength of perfect crystal, pass through the addition of whisker, improve the correlated performance of RPC, compression strength and flexural strength reach construction requirement, pass through the modification to steel fibre, improvement slurry is wrapped to steel fibre, improves the energy to failure and gain in strength of RPC product, reduces the appearance of interface micro-crack.
Description
Technical field
The present invention relates to concrete material field, more particularly to a kind of Reactive Powder Concrete and preparation method thereof with
On the way.
Background technique
Reactive Powder Concrete (Reactive Powder Concrete, hereinafter referred to as RPC) is after high-strength, high-performance is mixed
After solidifying soil, a kind of all very superior New Building Materials of mechanical property, endurance quality of appearance.It is by DSP
(Densified System containing ultra-fine Particles) material and fibre reinforced materials are mutually compound
High Technique Concrete.In use, it is not good enough in conjunction with slurry that there are steel fibres by existing RPC；Although RPC component backfin ratio with
Normal concrete is compared and is greatly improved, but RPC, after aquation, interface micro-crack still largely exists, and deposits inside slurry
In a large amount of fine lattice defect, the intensity for seriously affecting RPC is played.
Summary of the invention
In view of the foregoing deficiencies of prior art, the purpose of the present invention is to provide a kind of Reactive Powder Concrete and its
Preparation method and purposes, for improving, Reactive Powder Concrete steel fibre is drawn out easily, energy to failure is lower in the prior art, intensity increases
The problems such as long bad, interface micro-crack, lattice defect.
In order to achieve the above objects and other related objects, first aspect present invention provides a kind of Reactive Powder Concrete, packet
Include the raw material of following parts by weight: 400~1000 parts of cement, modified 100~500 parts of Ultramicro-powder, modified 50~200 parts of steel fibre,
900~1300 parts of quartz sand, 100-220 parts of silica flour, 10~30 parts of additive, 100~250 parts of water.
Preferably, the cement be P.052.5, one or more of P.O42.5, P.I52.5, P.I42.5 combination.
Further, the partial size of the quartz sand is 40-200 mesh, SiO in quartz sand2Mass content >=97%.
Further, the partial size of the silica flour is 400-1000 mesh, SiO in silica flour2Mass content >=97%.
Further, the additive is polycarboxylate water-reducer, water-reducing rate >=30%.
Further, the modified Ultramicro-powder includes the raw material of following parts by weight: 0~30 part of slag powders, silicon powder 10~
30 parts, 1~5 part of whisker, 0.2~0.6 part of coupling agent dilution.
Preferably, the slag powders are S95 grade slag powder, meet that " GB/T 18046-2008 is in cement and concrete
Ground granulated blast furnace slag ".
Preferably, specific surface area >=20m of the silicon powder2/kg。
Preferably, the whisker is the combination of one or more of calcium sulfate crystal whiskers, calcium carbonate crystal whisker, aluminium borate whisker,
Its draw ratio is greater than 20.
Preferably, the coupling agent dilution is silane coupling agent dilution or titanate coupling agent dilution, and silane is even
Join the mixed liquor that dilution agent liquid is silane coupling agent and dehydrated alcohol, titanate coupling agent dilution is titanate coupling agent and liquid
The mixed liquor of body paraffin.
It is highly preferred that the content of silane coupling agent is 1-5wt% in the silane coupling agent dilution；The titanate esters are even
The content for joining titanate coupling agent in dilution agent liquid is 10-50wt%.
It is highly preferred that the silane coupling agent is KH560 etc., the titanate coupling agent is TMS200 etc..
Further, the modified steel fiber includes the raw material of following parts by weight: 5~10 parts of steel fibre, silane coupling agent
0.01~0.5 part of dilution.
Further, the steel fibre is copper coating steel fibre, one or two combine in stainless steel fibre.
Preferably, the steel fibre diameter is 0.1~0.25mm, and length is 12~15mm.
Preferably, the silane coupling agent dilution is the mixed liquor of silane coupling agent, dehydrated alcohol, silane in dilution
The mass concentration of coupling agent is 1-5%.
It is highly preferred that the mass concentration of silane coupling agent is 2.5% in the silane coupling agent dilution.
It is highly preferred that the silane coupling agent is aminopropyl triethoxysilane, glycydoxy trimethoxy
The combination of one or more of base silane, mercaptopropyltriethoxysilane.
Second aspect of the present invention provides the preparation method of above-mentioned Reactive Powder Concrete, includes the following steps:
1) it prepares modified steel fibre: silane coupling agent being sprayed to steel fiber surface by formula ratio, it is dry, it is made described and changes
Property steel fibre, it is spare；Dry mode can be sunning or indoor seasoning, it is therefore an objective to so that steel fiber surface is dry, allow carboxyl
It is sufficiently precipitated to steel fiber surface, forms uniform silane film.
2) it prepares modified Ultramicro-powder: mixing slag powders, silicon powder, whisker by formula ratio, coupling dilution agent is added in grinding
Liquid carries out surface and is modified, and the modified Ultramicro-powder is made.
3) Reactive Powder Concrete slurry is prepared: by formula ratio that modified steel made from quartz sand, silica flour, step 1) is fine
Modified Ultramicro-powder mixing, stirs and evenly mixs made from dimension, cement, step 2), spare；Additive is added to the water to form additive water
Solution, then the aqueous solution of the additive is added in said mixture, the Reactive Powder Concrete slurry is made.
4) enter mould: Reactive Powder Concrete slurry made from step 3) is put into mold, stand so that slurry solidifies.
5) it just supports: Reactive Powder Concrete cured in step 4) and mold being put into togerther fog room, conserved, is tied
It is cooled to room temperature after beam.
6) it demoulds: Reactive Powder Concrete and its mold is removed into fog room, demoulding.
7) eventually support: the Reactive Powder Concrete after demoulding is moved in fog room and is conserved, after be cooled to room temperature.
8) Reactive Powder Concrete made from step 7) is moved into interior, natural moisture-keeping maintaining 7 days or more at room temperature, system
Obtain Reactive Powder Concrete finished product.
Further, in step 4), time of repose is 4~8h.
Further, in step 5) and step 7), maintenance method is steam curing or steam press maintenance.
Further, when the maintenance method in step 5) and step 7) is steam curing, 40 ± 5 are warming up in step 5)
DEG C, 70 ± 5 DEG C are warming up in step 7), heating rate≤12 DEG C/h are cooled to room temperature, cooling rate≤15 after maintenance
DEG C/h, control the cataclysm of its internal stress.
Third aspect present invention provides the purposes of above-mentioned Reactive Powder Concrete in construction projects.Reactive powder of the present invention
Concrete is in prestressed structure, prefabricated components, concrete filled steel tube, large-size components, abrasion-proof corrosion-proof arbor, radio-resistant structure etc.
In have been widely used.
As described above, a kind of Reactive Powder Concrete of the invention and preparation method thereof and purposes, have below beneficial to effect
Fruit: the present invention is modified by silane coupling agent surface by steel fibre, increases slurry to the bond stress of steel fibre；Whisker is mixed into silicon
In micro mist, and by coupling agent modified, improvement concrete interface, and very small, non-nuclear density gauge, atom are arranged using diameter of whiskers
Column high-sequential, intensity close to perfect crystal theoretical value, high mechanical strength the advantages that, improve intensity, the elasticity modulus of RPC
Deng.
Specific embodiment
Illustrate embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this specification
Other advantages and efficacy of the present invention can be easily understood for disclosed content.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also based on different viewpoints and application, without departing from
Various modifications or alterations are carried out under spirit of the invention.
Embodiment 1
A kind of Reactive Powder Concrete, the raw material including following parts by weight:
It is 460 parts of cement, modified 450 parts of Ultramicro-powder, modified 128 parts of steel fibre, 1180 parts of quartz sand, 180 parts of silica flour, outer
Add 23 parts of agent, 167 parts of water.
The raw material and weight ratio of modified steel fibre are copper facing steel fibre: aminopropyl triethoxysilane coupling agent dilution=
10:0.3, steel fibre diameter are 0.1~0.25mm, and length is 12~15mm, and the raw material and weight ratio of modified Ultramicro-powder are slag
Powder: silicon powder: calcium sulfate crystal whiskers: aminopropyl triethoxysilane coupling agent dilution=10:10:2.5:0.4.Cement is common
52.5 class g cement of silicate (meets " GB175-2007 common portland cement ")；Slag powders are S95 grades and (meet " GB/
T18046-2008 is for the ground granulated blast furnace slag in cement and concrete ")；Additive be polycarboxylate water-reducer (water-reducing rate >=
30%, meet " JG/T 223-2007 polycarboxylate high performance water-reducing agent ").
The preparation method of above-mentioned Reactive Powder Concrete material includes the following steps:
1) steel fibre, the silane coupling agent dilution after surface clean are mixed by formula ratio, it specifically, will be silane coupled
The dilution that agent is 2.5wt% with the concentration that dehydrated alcohol is diluted to silane coupling agent is uniformly sprayed to the steel fibre spread out
Surface dries 60 minutes, to dry tack free, carboxyl is allowed sufficiently to be precipitated to steel fiber surface, the modified steel fibre is made.
2) slag powders, silicon powder, whisker are mixed by formula ratio, it is (silane coupled sprays into silane coupling agent KH560 dilution
The mixed liquor of agent KH560 and dehydrated alcohol, the content of silane coupling agent KH560 is 2.5wt% in dilution), grinding 10-
The modified Ultramicro-powder is made so that each material is sufficiently mixed in 15min.
3) steel fibre, cement, step will will be modified made from quartz sand, silica flour, step 1) by formula ratio by formula ratio
2) modified Ultramicro-powder mixing, is stirred 3~8 minutes made from；Additive is mixed with water by formula ratio, so that additive is diluted
It is added in said mixture, stirs 2~5 minutes at aqueous solution, then by the aqueous solution, the Reactive Powder Concrete slurry is made
Body.
4) enter mould: Reactive Powder Concrete slurry made from step 3) is put into mold, stand 6h and slurry is solidified.
5) it just supports: Reactive Powder Concrete cured in step 4) being warming up to 40 ± 5 DEG C by the rate of 12 DEG C/h, and is protected
It holds temperature steam maintenance and for 24 hours, then by the rate of 15 DEG C/h is cooled to room temperature.
6) it demoulds: Reactive Powder Concrete and its mold is removed into steam-curing chamber, demoulding.
7) it supports eventually: the Reactive Powder Concrete after demoulding being moved in steam-curing chamber, is warming up to by the rate of 12 DEG C/h
70 ± 5 DEG C, steam curing 72h, then room temperature is cooled to by the rate of 15 DEG C/h.
8) Reactive Powder Concrete made from step 7) is moved into interior, natural moisture-keeping maintaining 7 days or more at room temperature, system
Obtain Reactive Powder Concrete finished product.
Gained Reactive Powder Concrete test specimen performance are as follows: compression strength 135.7MPa, flexural strength 20.3MPa.
Embodiment 2
A kind of Reactive Powder Concrete, the raw material including following parts by weight:
It is 480 parts of cement, modified 400 parts of Ultramicro-powder, modified 156 parts of steel fibre, 1150 parts of quartz sand, 200 parts of silica flour, outer
Add 22 parts of agent, 170 parts of water.
The raw material and weight ratio of modified steel fibre are stainless steel fibre: glycidyl ether oxypropyltrimethoxysilane is dilute
Liquid=10:0.25 is released, steel fibre diameter is 0.1~0.25mm, and length is 12~15mm；The raw material and weight ratio of modified Ultramicro-powder
For slag powders: silicon powder: calcium sulfate crystal whiskers: aminopropyl triethoxysilane coupling agent dilution=10:20:3:0.5.Cement is
42.5 class g cement of normal silicate and 52.5 class g cement mixtures (meeting " GB175-2007 common portland cement ")；Slag powders
For S95 grades (meeting " GB/T 18046-2008 is for the ground granulated blast furnace slag in cement and concrete ")；Additive is poly- carboxylic
Sour water-reducing agent (water-reducing rate >=30% meets " JG/T 223-2007 polycarboxylate high performance water-reducing agent ").
The preparation method of above-mentioned Reactive Powder Concrete material includes the following steps:
1) stainless steel fibre, silane coupling agent are mixed by formula ratio, it is specifically, silane coupling agent dehydrated alcohol is dilute
The dilution for being 2.5wt% to the concentration of silane coupling agent is released, the steel fiber surface spread out is uniformly sprayed to, dries 60 points
Clock allows carboxyl to be sufficiently precipitated to steel fiber surface to dry tack free, and the modified steel fibre is made.
2) slag powders, silicon powder, whisker are mixed by formula ratio, sprays into aminopropyl triethoxysilane coupling agent dilution
(mixed liquor of silane coupling agent and dehydrated alcohol, the content of silane coupling agent is 2.5wt% in dilution), institute is made in grinding
State modified Ultramicro-powder.
3) by formula ratio will by formula ratio will modified steel fibre made from quartz sand, silica flour, step 1), cement, step
2) modified Ultramicro-powder mixing, is stirred 3~8 minutes made from；Additive is mixed with water by formula ratio, so that additive is diluted
It is added in said mixture, stirs 2~5 minutes at aqueous solution, then by the aqueous solution, the Reactive Powder Concrete slurry is made
Body.
4) enter mould: Reactive Powder Concrete slurry made from step 3) is put into mold, stand 8h and slurry is solidified.
5) it just supports: Reactive Powder Concrete cured in step 4) being warming up to 40 ± 5 DEG C by the rate of 12 DEG C/h, and is protected
It holds temperature steam maintenance and for 24 hours, then by the rate of 15 DEG C/h is cooled to room temperature.
6) it demoulds: Reactive Powder Concrete and its mold is removed into steam-curing chamber, demoulding.
7) it supports eventually: the Reactive Powder Concrete after demoulding being moved in steam-curing chamber, is warming up to by the rate of 12 DEG C/h
70 ± 5 DEG C, steam press maintenance 96h, then room temperature is cooled to by the rate of 15 DEG C/h.
8) Reactive Powder Concrete made from step 7) is moved into interior, natural moisture-keeping maintaining 7 days or more at room temperature, system
Obtain Reactive Powder Concrete finished product.
Gained Reactive Powder Concrete test specimen performance are as follows: compression strength 131.4MPa, flexural strength 23.1MPa.
Embodiment 3
A kind of Reactive Powder Concrete, the raw material including following parts by weight:
It is 450 parts of cement, modified 400 parts of Ultramicro-powder, modified 165 parts of steel fibre, 1160 parts of quartz sand, 220 parts of silica flour, outer
Add 30 parts of agent, 165 parts of water.
The raw material and weight ratio of modified steel fibre are copper facing steel fibre and stainless steel fibre mixture: mercapto propyl triethoxy
Silane dilution liquid=10:0.3, steel fibre diameter are 0.1~0.25mm, and length is 12~15mm；The raw material of modified Ultramicro-powder and
Weight ratio is slag powders: silicon powder: calcium sulfate crystal whiskers: aminopropyl triethoxysilane coupling agent dilution=15:25:3.5:
0.5.Cement is 52.5 class g cement of normal silicate (meeting " GB175-2007 common portland cement ")；Slag powders are S95 grades
(meeting " GB/T 18046-2008 is for the ground granulated blast furnace slag in cement and concrete ")；Additive is polycarboxylic acids diminishing
Agent (water-reducing rate >=30% meets " JG/T 223-2007 polycarboxylate high performance water-reducing agent ").
The preparation method of above-mentioned Reactive Powder Concrete material includes the following steps:
1) steel fibre, silane coupling agent are mixed by formula ratio, specifically, silane coupling agent is diluted to dehydrated alcohol
The concentration of silane coupling agent is the dilution of 2.5wt%, is uniformly sprayed to the steel fiber surface spread out, is dried 60 minutes, to
Dry tack free allows carboxyl to be sufficiently precipitated to steel fiber surface, and the modified steel fibre is made.
2) slag powders, silicon powder, whisker are mixed by formula ratio, sprays into aminopropyl triethoxysilane coupling agent dilution
(aminopropyl triethoxysilane coupling agent dilution is the mixed liquor of aminopropyl triethoxysilane coupling agent and dehydrated alcohol,
The content of aminopropyl triethoxysilane coupling agent is 2.5wt% in dilution), the modified ultra micro is made in grinding 12min
Powder.
3) steel fibre, step will will be modified made from quartz sand, silica flour, cement, step 1) by formula ratio by formula ratio
2) modified Ultramicro-powder mixing, stirs 3~8 minutes, additive is diluted to aqueous solution with suitable quantity of water, above-mentioned mixing is added made from
It in object, stirs 2~5 minutes, is eventually adding the water of surplus, stir 2~5 minutes, the Reactive Powder Concrete slurry is made.
4) enter mould: Reactive Powder Concrete slurry made from step 3) is put into mold, stand 8h and slurry is solidified.
5) it just supports: Reactive Powder Concrete cured in step 4) being warming up to 40 ± 5 DEG C by the rate of 12 DEG C/h, and is protected
Temperature steam maintenance 36h is held, then is cooled to room temperature by the rate of 12 DEG C/h.
6) it demoulds: Reactive Powder Concrete and its mold is removed into steam-curing chamber, demoulding.
7) it supports eventually: the Reactive Powder Concrete after demoulding being moved in steam-curing chamber, is warming up to by the rate of 12 DEG C/h
70 ± 5 DEG C, steam curing 96h, then room temperature is cooled to by the rate of 12 DEG C/h.
8) Reactive Powder Concrete made from step 7) is moved into interior, natural moisture-keeping maintaining 7 days or more at room temperature, system
Obtain Reactive Powder Concrete finished product.
Gained Reactive Powder Concrete test specimen performance are as follows: compression strength 137.4MPa, flexural strength 23.9MPa.
Embodiment 4
A kind of Reactive Powder Concrete, the raw material including following parts by weight:
It is 600 parts of cement, modified 270 parts of Ultramicro-powder, modified 170 parts of steel fibre, 1160 parts of quartz sand, 210 parts of silica flour, outer
Add 26 parts of agent, 170 parts of water.
The raw material and weight ratio of modified steel fibre are copper facing steel fibre and stainless steel fibre mixture: mercapto propyl triethoxy
Silane and the mixed diluting of glycidyl ether oxypropyltrimethoxysilane liquid=10:0.3, steel fibre diameter be 0.1~
0.25mm, length are 12~15mm；The raw material and weight ratio of modified Ultramicro-powder are slag powders: silicon powder: calcium sulfate crystal whiskers: metatitanic acid
Dilution=15:30:4:0.5 of ester coupling agent TMS200.Cement is that 42.5 class g cement of normal silicate (meets " GB175-
2007 common portland cements ")；Slag powders be S95 grade (meet " and GB/T 18046-2008 be used for cement and concrete in grain
Change ground granulated blast furnace slag ")；Additive is that (water-reducing rate >=30% meets " JG/T 223-2007 polycarboxylic-acid height to polycarboxylate water-reducer
Performance water-reducing agent ").
The preparation method of above-mentioned Reactive Powder Concrete material includes the following steps:
1) steel fibre, silane coupling agent dilution are mixed by formula ratio, specifically, by silane coupling agent dehydrated alcohol
The concentration for being diluted to silane coupling agent is the dilution of 2.5wt%, is uniformly sprayed to the steel fiber surface spread out, dries 60 points
Clock allows carboxyl to be sufficiently precipitated to steel fiber surface and forms uniform silane film, the modified steel fibre is made to dry tack free.
2) slag powders, silicon powder, whisker are mixed by formula ratio, sprays into the dilution (titanium of titanate coupling agent TMS200
The dilution of acid esters coupling agent TMS200 is the mixed liquor of titanate coupling agent TMS200 and atoleine, titanate esters in dilution
The content of coupling agent TMS200 is 50wt%), the modified Ultramicro-powder is made in grinding 12min.
3) steel fibre, step will will be modified made from quartz sand, silica flour, cement, step 1) by formula ratio by formula ratio
2) modified Ultramicro-powder mixing, is stirred 3~8 minutes made from；Additive is diluted to aqueous solution with suitable quantity of water, above-mentioned mixing is added
It in object, stirs 2~5 minutes, is eventually adding the water of surplus, stir 2~5 minutes, the Reactive Powder Concrete slurry is made.
4) enter mould: Reactive Powder Concrete slurry made from step 3) is put into mold, stand 8h and slurry is solidified.
5) it just supports: Reactive Powder Concrete cured in step 4) being warming up to 40 ± 5 DEG C by the rate of 12 DEG C/h, and is protected
Temperature steam maintenance 36h is held, then is cooled to room temperature by the rate of 12 DEG C/h.
6) it demoulds: Reactive Powder Concrete and its mold is removed into fog room, demoulding.
7) it supports eventually: the Reactive Powder Concrete after demoulding being moved in steam-curing chamber, is warming up to by the rate of 12 DEG C/h
70 ± 5 DEG C, steam curing 96h, then room temperature is cooled to by the rate of 12 DEG C/h.
8) Reactive Powder Concrete made from step 7) is moved into interior, natural moisture-keeping maintaining 7 days or more at room temperature, system
Obtain Reactive Powder Concrete finished product.
Gained Reactive Powder Concrete test specimen performance are as follows: compression strength 130.6MPa, flexural strength 26.3MPa.
Embodiment 5
A kind of Reactive Powder Concrete, the raw material including following parts by weight:
It is 620 parts of cement, modified 250 parts of Ultramicro-powder, modified 175 parts of steel fibre, 1150 parts of quartz sand, 210 parts of silica flour, outer
Add 28 parts of agent, 168 parts of water.
The raw material and weight ratio of modified steel fibre are copper facing steel fibre and stainless steel fibre mixture: mercapto propyl triethoxy
Silane and the mixed diluting of glycidyl ether oxypropyltrimethoxysilane liquid=10:0.3, steel fibre diameter be 0.1~
0.25mm, length are 12~15mm；The raw material and weight ratio of modified Ultramicro-powder are slag powders: silicon powder: calcium sulfate crystal whiskers: metatitanic acid
Dilution=15:35:4:0.4 of ester coupling agent TMS200.Cement is that 42.5 class g cement of normal silicate (meets " GB175-
2007 common portland cements ")；Slag powders be S95 grade (meet " and GB/T 18046-2008 be used for cement and concrete in grain
Change ground granulated blast furnace slag ")；Additive is that (water-reducing rate >=30% meets " JG/T 223-2007 polycarboxylic-acid height to polycarboxylate water-reducer
Performance water-reducing agent ").
The preparation method of above-mentioned Reactive Powder Concrete material includes the following steps:
1) steel fibre, silane coupling agent dilution are mixed by formula ratio, specifically, by silane coupling agent dehydrated alcohol
The concentration for hydrolyzing, being diluted to silane coupling agent is the dilution of 2.5wt%, is uniformly sprayed to the steel fiber surface spread out, dries in the air
It shines 60 minutes, to dry tack free, allows carboxyl to be sufficiently precipitated to steel fiber surface and form uniform silane film, it is fine that the modified steel is made
Dimension.
2) ground slag powder, silicon powder, whisker are mixed by formula ratio, sprays into the dilution of titanate coupling agent TMS200
(dilution of titanate coupling agent TMS200 is the mixed liquor of titanate coupling agent TMS200 and atoleine, titanium in dilution
The content of acid esters coupling agent TMS200 is 50wt%), the modified Ultramicro-powder is made in grinding 12min.
3) will change made from modified steel fibre made from quartz sand, silica flour, cement, step 1), step 2) by formula ratio
Property Ultramicro-powder mixing, stir 3~8 minutes；Additive is diluted to aqueous solution with suitable quantity of water, is added in said mixture, stirring 2
~5 minutes, it is eventually adding the water of surplus, stirs 2~5 minutes, the Reactive Powder Concrete slurry is made.
4) enter mould: Reactive Powder Concrete slurry made from step 3) is put into mold, stand 8h and slurry is solidified.
5) it just supports: Reactive Powder Concrete cured in step 4) being warming up to 40 ± 5 DEG C by the rate of 12 DEG C/h, and is protected
Temperature steam maintenance 36h is held, then is cooled to room temperature by the rate of 12 DEG C/h.
6) it demoulds: Reactive Powder Concrete and its mold is removed into steam-curing chamber, demoulding.
7) steam press maintenance: the Reactive Powder Concrete after demoulding is moved in steam-curing chamber, by the rate liter of 12 DEG C/h
Temperature is cooled to room temperature to 70 ± 5 DEG C, steam curing 96h, then by the rate of 12 DEG C/h.
8) Reactive Powder Concrete made from step 7) is moved into interior, natural moisture-keeping maintaining 7 days or more at room temperature, system
Obtain Reactive Powder Concrete finished product.
Gained Reactive Powder Concrete test specimen performance are as follows: compression strength 131.1MPa, flexural strength 27.5MPa.
In conclusion the present invention is modified to steel fiber surface by coupling agent, a large amount of carboxyl is deposited on steel fibre table
Face further increases slurry to the package power of steel fibre, improves the micro interface of steel fibre and slurry.Have using whisker certain
Draw ratio, its intensity close to theoretical lattice intensity advantage, and by coupling agent to Ultramicro-powder surface modification, increase its dispersion
Property and intermolecular interpenetrating.
The present invention is according to inorganic crystal whisker non-nuclear density gauge, crystal intensity close to theoretical value, mechanical strength of perfect crystal etc.
The correlated performance of RPC is improved by the addition of whisker in the characteristic of neighbouring interatomic force, improves compression strength and flexural strength
To meet different construction requirements, steel fibre is wrapped good with slurry, and energy to failure is higher, and gain in strength is good, and interface micro-crack subtracts
It is few.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology all without departing from the spirit and scope of the present invention, carries out modifications and changes to above-described embodiment.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should be covered by the claims of the present invention.
Claims (8)
1. a kind of Reactive Powder Concrete, which is characterized in that the raw material including following parts by weight: 400-1000 parts of cement is modified
100-500 parts of Ultramicro-powder, modified steel fibre 50-200 parts, 900-1300 parts of quartz sand, 100-220 parts of silica flour, additive 10-
30 parts, 100-250 parts of water；The modified Ultramicro-powder includes the raw material of following parts by weight: 0-30 parts of slag powders, silicon powder 10-
The draw ratio of 30 parts, 1-5 parts of whisker, 0.2-0.6 parts of coupling agent dilution, the whisker is greater than 20, the modified steel fibre
Raw material including following parts by weight: 5-10 parts of steel fibre, 0.01-0.5 parts of silane coupling agent dilution.
2. Reactive Powder Concrete according to claim 1, it is characterised in that: the cement be P.052.5, P.O42.5,
One or more of P.I52.5, P.I42.5 combination, the partial size of the quartz sand are 40-200 mesh, the partial size of the silica flour
For 400-1000 mesh, the additive is polycarboxylate water-reducer, water-reducing rate >=30%.
3. Reactive Powder Concrete according to claim 1, it is characterised in that: the slag powders are S95 grade slag powder, institute
State specific surface area >=20m of silicon powder2/kg。
4. Reactive Powder Concrete according to claim 1, it is characterised in that: the whisker is calcium sulfate crystal whiskers, carbonic acid
The combination of one or more of calcium pyroborate, aluminium borate whisker.
5. Reactive Powder Concrete according to claim 1, it is characterised in that: the coupling agent dilution is silane coupled
Dilution agent liquid or titanate coupling agent dilution, silane coupling agent dilution are the mixed liquor of silane coupling agent and dehydrated alcohol,
Titanate coupling agent dilution is the mixed liquor of titanate coupling agent and atoleine.
6. Reactive Powder Concrete according to claim 1, it is characterised in that: silane coupling agent dilution is silane coupled
The mixed liquor of agent and dehydrated alcohol, the silane coupling agent are aminopropyl triethoxysilane, glycydoxy three
The combination of one or more of methoxy silane, mercaptopropyltriethoxysilane.
7. a kind of preparation method of Reactive Powder Concrete, which comprises the steps of:
1) it prepares modified steel fibre: silane coupling agent being sprayed to steel fiber surface by formula ratio, it is dry, the modified steel is made
Fiber, it is spare；
2) prepare modified Ultramicro-powder: mixing slag powders, silicon powder, whisker by formula ratio, grinding, be added coupling agent dilution into
Row surface is modified, and the modified Ultramicro-powder is made；
3) prepare Reactive Powder Concrete slurry: by formula ratio will modified steel fibre made from quartz sand, silica flour, step 1),
Modified Ultramicro-powder mixing, stirs and evenly mixs made from cement, step 2, spare；Additive is added to the water to form additive water-soluble
Liquid, then the aqueous solution of the additive is added in said mixture, the Reactive Powder Concrete slurry is made；
4) enter mould: Reactive Powder Concrete slurry made from step 3) is put into mold, stand so that slurry solidifies；
5) it just supports: Reactive Powder Concrete cured in step 4) and mold being put into togerther fog room, conserved, after
It is cooled to room temperature；
6) it demoulds: Reactive Powder Concrete and its mold is removed into fog room, demoulding；
7) eventually support: the Reactive Powder Concrete after demoulding is moved in fog room and is conserved, after be cooled to room temperature；
8) Reactive Powder Concrete made from step 7) is moved into interior, natural moisture-keeping maintaining, is made reactive powder at room temperature
Concrete finished product.
8. the purposes of Reactive Powder Concrete according to claim 1-6 in construction projects.
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| CN108191342A (en) * | 2018-02-11 | 2018-06-22 | 重庆天维绿色建筑技术开发有限公司 | A kind of super high strength high performance concrete and preparation method thereof and purposes |
| CN110078448B (en) * | 2019-05-15 | 2021-07-30 | 宁波西立混凝土有限公司 | Anti-cracking early-strength concrete and preparation method thereof |
| CN112871122B (en) * | 2020-12-31 | 2022-11-29 | 哈尔滨工业大学 | Reaction kettle for preparing nano silicon modified steel fibers in large batch and preparation method |
| CN115677382B (en) * | 2022-11-03 | 2023-08-11 | 中建三局科创产业发展有限公司 | Interface reinforcing agent for 3D printed concrete |
| CN115710110A (en) * | 2022-12-06 | 2023-02-24 | 中冶武汉冶金建筑研究院有限公司 | Active anchoring type fiber concrete and preparation method thereof |
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