CN107640942A - A kind of flyash in great mixed amount high Strength Cement Based Composite Material and preparation method thereof - Google Patents
A kind of flyash in great mixed amount high Strength Cement Based Composite Material and preparation method thereof Download PDFInfo
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- CN107640942A CN107640942A CN201710959561.8A CN201710959561A CN107640942A CN 107640942 A CN107640942 A CN 107640942A CN 201710959561 A CN201710959561 A CN 201710959561A CN 107640942 A CN107640942 A CN 107640942A
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- flyash
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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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Abstract
The invention provides a kind of flyash in great mixed amount high Strength Cement Based Composite Material and preparation method thereof, the constituent of the cement-base composite material includes cement, rutile type nano titanic oxide, flyash, sand, ultra-fine copper facing steel fibre, water reducer, defoamer and water.The present invention has played the filing effect and nucleus effect of nano titanium oxide, make use of the enhancing mechanism of assorted fibre, compensate for the loss of strength that flyash in great mixed amount is brought to cement-based material, has the characteristics that convenient for production, strong operability, good mechanical performance.
Description
Technical field
The present invention relates to a kind of flyash in great mixed amount high Strength Cement Based Composite Material and preparation method thereof technology, belong to building
Material and builds to foundation engineering technical field.
Background technology
With being on the increase for trade waste, it is the one of refuse reclamation that solid waste, which is added in cement-based material,
Big solution route.Flyash is as a kind of active mineral admixture, due to active effect, shape effect and micro aggregate effect
Etc. positive role, cement consumption can be reduced by adding it in cement-based material, reduced the heat of hydration, reduced and shrink and increase resistance to
Long property.And increase the mix ratio of flyash, the economic benefit and environmental protection effect of flyash can be played by a larger margin, still
The problem of large-doping-amount fly ash cement sill generally existing low intensity, especially early strength.Therefore, large dosage fine coal is lifted
The mechanical property of buck cement-based material is abundant, efficient utilization one big urgent problem of flyash.
Nano material compares conventional material, has significantly bigger specific surface area, significantly higher surface-active and shows
Bigger surface atom proportion is write, filing effect can not only be played by being added in cement-based material, make up cement, mineral
The deficiency of the filling capacities such as admixture, increase the density of body, while its high surface and bigger serface can promote
The aquation of binder materials, more nucleation sites are provided for the generation of hydrated product, produce nucleus effect.In view of nano material
These characteristics, nano material are fully applicable to be used as reinforcing material in large-doping-amount fly ash cement sill, make up and mix greatly
Measure the loss of strength caused by flyash.Except micro-nano packing material, high-performance fiber is also that a kind of important cement base increases
Strong material, and compared to single kind fiber, carry out two or more different type, dual extension-compression modulus, difference
The fiber hybrid of size helps to lift material mechanical performance and improves material damage form.
Therefore, give full play to the chemiluminescence of nano material and assorted fibre, be develop high-strength, ecological, environmental protective,
The important channel of the large-doping-amount fly ash cement sill of excellent performance.
The content of the invention
Technical problem：Flyash in great mixed amount high-strength cement base is prepared the technical problem to be solved in the present invention is to provide one kind to answer
The method of condensation material, this method has played the filing effect and nucleus effect of nano titanium oxide, simultaneously because fiber hybrid
The mechanical property and failure mechanism of material are improved, realizes the high strengthening of large-doping-amount fly ash cement sill.
Technical scheme：The flyash in great mixed amount high Strength Cement Based Composite Material of the present invention includes following components and each component
Folk prescription consumption proportion (kg/m3) as follows：
Cement 386~623；
Flyash 421~617；
Nano titanium oxide 9~11；
Sand 990~1055；
Ultra-fine copper facing steel fibre 190~200；
Water reducer 15~19；
Defoamer 9~11；
Water 174~204.
Wherein：
Described cement is the portland cement of strength grade 52.5；
Described flyash is I grade of Class F fly ash；
Described nano titanium oxide belongs to rutile-type, and particle size range is 10~40nm, and its purity exceedes
99.5%；
Described sand is the quartziferous river sand that maximum particle diameter is no more than 2.36mm；
Described ultra-fine copper facing steel fibre is a diameter of 0.2mm, length 13mm flat shape and end hook shape copper facing steel fibre
In mass ratio 2:1 mixes；
Described water reducer is the polycarboxylic acid series additive that water-reducing rate is more than 40%；
Described defoamer is efficient organosilicon defoaming powder.
Present invention also offers a kind of preparation method of flyash in great mixed amount high Strength Cement Based Composite Material, including following step
Suddenly：
1) it is uniform that cement, flyash, the defoamer hand operated mixing in agitated kettle are weighed successively by formula rate, then is added successively
Enter nano titanium oxide and sand, stirred using use for laboratory mortar mixer to the uniform dry powder of color；
2) weigh water reducer and water is mixed into aqua, be slowly added into the dry powder that the step 1) obtains.First
Stirred 4~5 minutes with 140 ± 5r/min rotating speed, then stirred 1 minute or so with 285 ± 10r/min rotating speed, form work
The good slurry of the property made；
3) steel fibre weighed is uniformly added into stirring container, persistently stirs 2~3 minutes, make steel fibre in matrix
In be uniformly dispersed；
4) mixture prepared by the step 3) is poured into mould, air entrapment discharge is vibrated to using shake table；
5) form removal after standard curing 48 hours is carried out, 85 DEG C of steam curings of 96 hours is then carried out, obtains described answer
Condensation material test specimen.
Beneficial effect：Flyash in great mixed amount high Strength Cement Based Composite Material provided by the invention and preparation method thereof, it is and same
Class technology, can be wide in civil engineering materials field compared to having the characteristics that good mechanical performance, high performance-price ratio, preparation technology are simple
General popularization.
The nano titanium oxide of the present invention has nanometer size effect, adds it to play in cement-based material and fills out
Effect and nucleus effect are filled, so as to promote the closely knit of the aquation of cement and matrix, improves the mechanical property of composite.The present invention
The advantages of strengthening with reference to nano titanium oxide and hybrid fiber, the composite prepared by the above method can apply to build
Build engineering, traffic engineering, municipal works, Tunnel Engineering and there are the civil engineering materials fields such as the engineering structure of particular/special requirement.
Currently invention addresses nano material and the multiple elements design effect of hybrid fiber, by mixing nano titanium oxide more
The deficiency of cement particle and flyash filling capacity has been mended, while has mixed the mechanical property for improving composite by steel fibre
And failure mechanism, successfully prepared under simple moulding process and curing condition be easy to constructing operation, compression strength 100MPa~
210MPa, rupture strength 28MPa~43MPa flyash in great mixed amount high Strength Cement Based Composite Material.
Embodiment
The flyash in great mixed amount high Strength Cement Based Composite Material of the present invention is made below in conjunction with instantiation further detailed
Explanation.
A kind of flyash in great mixed amount high Strength Cement Based Composite Material, containing cement, flyash, nano titanium oxide, sand, subtract
Aqua, defoamer, steel fibre and water, folk prescription consumption proportion (kg/m3) as follows：
Cement 386~623；
Flyash 421~617；
Nano titanium oxide 9~11；
Sand 990~1055；
Ultra-fine copper facing steel fibre (two kinds of fiber quality ratios 2 of flat shape and end hook shape:1 mixes) 190~200；
Water reducer 15~19；
Defoamer 9~11；
Water 174~204；
Described flyash in great mixed amount high Strength Cement Based Composite Material, it is characterised in that cement is strength grade 52.5
Portland cement；
Described flyash in great mixed amount high Strength Cement Based Composite Material, it is characterised in that flyash is I grade of low calcium fine coal
Ash；
Described flyash in great mixed amount high Strength Cement Based Composite Material, it is characterised in that nano titanium oxide is to belong to gold
Red stone-type, particle size range is 10~40nm, and its purity is more than 99.5%；
Described flyash in great mixed amount high Strength Cement Based Composite Material, it is characterised in that sand is that maximum particle diameter is no more than
2.36mm quartziferous river sand；
Described flyash in great mixed amount high Strength Cement Based Composite Material, it is characterised in that ultra-fine copper facing steel fibre is diameter
For 0.2mm, length 13mm flat shape or end hook shape copper facing steel fibre；
Described flyash in great mixed amount high Strength Cement Based Composite Material, it is characterised in that water reducer is that water-reducing rate is more than
40% polycarboxylic acid series additive；
Described flyash in great mixed amount high Strength Cement Based Composite Material, it is characterised in that defoamer is that efficient organosilicon disappears
Steep powder.
A kind of preparation method of flyash in great mixed amount high Strength Cement Based Composite Material, comprises the following steps：
1) it is uniform that cement, flyash, the defoamer hand operated mixing in agitated kettle are weighed successively by formula rate, then is added successively
Enter nano titanium oxide and sand, stirred using use for laboratory mortar mixer to the uniform dry powder of color；
2) weigh water reducer and water is mixed into aqua, be slowly added into the dry powder that the step 1) obtains.First
Stirred 4~5 minutes with 140 ± 5r/min rotating speed, then stirred 1 minute or so with 285 ± 10r/min rotating speed, form work
The good slurry of the property made；
3) steel fibre weighed is uniformly added into stirring container, persistently stirs 2~3 minutes, make steel fibre in matrix
In be uniformly dispersed；
4) mixture prepared by the step 3) is poured into mould, air entrapment discharge is vibrated to using shake table；
5) form removal after standard curing 48 hours is carried out, 85 DEG C of steam curings of 96 hours is then carried out, obtains described answer
Condensation material test specimen.
Cement-based material prepared by the embodiment of the present invention and its control group according to《Normal concrete mechanical property test side
Method standard》The mechanical property of method test compound material in (GB/T 50081-2002), according to《Flow of cement mortar is surveyed
Determine method》Operating characteristics of (GB/T 2419-2005) the test compound material in not fibre-bearing.
Illustrated according to encompassed content
Embodiment 1：
Flyash in great mixed amount high Strength Cement Based Composite Material with high workability, its folk prescription consumption proportion (kg/m3) such as
Shown in table 1：
The flyash in great mixed amount high Strength Cement Based Composite Material proportioning (kg/m of the high workability of table 13)
Note：Nano titanium oxide volume uses inner blending method, and flat shape is 2 with end hook shape extra-fine steel fiber quality ratio：1.
According to said ratio, service behaviour and resistance to compression corresponding to obtained flyash in great mixed amount high Strength Cement Based Composite Material
Intensity is as shown in table 2：
The service behaviour and mechanical strength of the flyash in great mixed amount high Strength Cement Based Composite Material of the high workability of table 2
Described above is only that the preferable embodiment of the present invention, those skilled in the art are done according to the above
Equivalent substitution, improvements and modifications are regarded as the protection content of the present invention.
Claims (9)
1. a kind of flyash in great mixed amount high Strength Cement Based Composite Material, it is characterised in that the high Strength Cement Based Composite Material is each
The folk prescription consumption proportion of composition is as follows：Unit is kg/m3
Cement 386~623；
Flyash 421~617；
Nano titanium oxide 9~11；
Sand 990~1055；
Ultra-fine copper facing steel fibre 190~200；
Water reducer 15~19；
Defoamer 9~11；
Water 174~204.
2. flyash in great mixed amount high Strength Cement Based Composite Material according to claim 1, it is characterised in that described cement
It is the portland cement of strength grade 52.5.
3. flyash in great mixed amount high Strength Cement Based Composite Material according to claim 1, it is characterised in that described fine coal
Ash is I grade of Class F fly ash.
4. flyash in great mixed amount high Strength Cement Based Composite Material according to claim 1, it is characterised in that described nanometer
Titanium dioxide belongs to rutile-type, and particle size range is 10~40nm, and its purity is more than 99.5%.
5. flyash in great mixed amount high Strength Cement Based Composite Material according to claim 1, it is characterised in that described sand is
Maximum particle diameter is no more than 2.36mm quartziferous river sand.
6. flyash in great mixed amount high Strength Cement Based Composite Material according to claim 1, it is characterised in that described is ultra-fine
Copper facing steel fibre is a diameter of 0.2mm, length 13mm flat shape and end hook shape copper facing steel fibre in mass ratio 2:1 mixes.
7. flyash in great mixed amount high Strength Cement Based Composite Material according to claim 1, it is characterised in that the water reducer
It is the polycarboxylic acid series additive that water-reducing rate is more than 40%.
8. flyash in great mixed amount high Strength Cement Based Composite Material according to claim 1, it is characterised in that described defoaming
Agent is efficient organosilicon defoaming powder.
A kind of 9. method of the flyash in great mixed amount high Strength Cement Based Composite Material prepared described in claim 1, it is characterised in that
This method comprises the following steps：
1) cement, flyash, defoamer, nano titanium oxide, sand are weighed in stirring container by formula rate, is stirred using mortar
The machine of mixing is stirred to the uniform dry powder of color；
2) water reducer and water are well mixed and are added in the dry powder that the step 1) obtains, by the low speed of 5~6 minutes,
High-speed stirred flow prepares slurry；
3) steel fibre is added in mixture slurry, carries out stirring in 2~3 minutes and steel fibre is uniformly dispersed；
4) mixture that the step 3) obtains is poured into mould and carries out appropriate vibrate；
5) 85 DEG C of steam curings of 96 hours are carried out after 48 hours in standard curing, prepare the cement-based material.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114634340A (en) * | 2022-03-24 | 2022-06-17 | 长安大学 | Cement-based material added with ultrafine fly ash and preparation process thereof |
| CN115108797A (en) * | 2022-07-01 | 2022-09-27 | 新特新材料集团(河南)股份有限公司 | Pumpable normal-temperature-curing ultrahigh-performance cement-based composite material |
| CN115368073A (en) * | 2022-07-11 | 2022-11-22 | 华北水利水电大学 | Cement mortar and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114634340A (en) * | 2022-03-24 | 2022-06-17 | 长安大学 | Cement-based material added with ultrafine fly ash and preparation process thereof |
| CN115108797A (en) * | 2022-07-01 | 2022-09-27 | 新特新材料集团(河南)股份有限公司 | Pumpable normal-temperature-curing ultrahigh-performance cement-based composite material |
| CN115368073A (en) * | 2022-07-11 | 2022-11-22 | 华北水利水电大学 | Cement mortar and preparation method thereof |
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Application publication date: 20180130 |