CN106278037A - Super dense concrete - Google Patents
Super dense concrete Download PDFInfo
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- CN106278037A CN106278037A CN201610664360.0A CN201610664360A CN106278037A CN 106278037 A CN106278037 A CN 106278037A CN 201610664360 A CN201610664360 A CN 201610664360A CN 106278037 A CN106278037 A CN 106278037A
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- concrete
- dense concrete
- super dense
- water
- cement
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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
Abstract
The present invention is to surpass dense concrete about one, and the effective diffusion cofficient of Ce 137 ion is 4.5 × 10‑5‑4.8×10‑5cm2/ d, villaumite infiltration coefficient 5 × 10‑19‑10×10‑19m2/ s, nitrogen infiltration coefficient 0.5 × 10‑19‑1.0×10‑19m2, under 1.2 2.0MPa pressure, water penetration height is 0, comprising: Binder Materials, aggregate, water, steel fibre and water reducer.The present invention surpasses that dense concrete has good radionuclide diffusion coefficient, water oozes, villaumite permeates and nitrogen gas permeability energy, has good abrasion and corrosion resistance and containing, the performance of retardance radionuclide.
Description
Technical field
The present invention relates to a kind of concrete, particularly relate to a kind of super dense concrete.
Background technology
Concrete is the construction material that consumption is maximum the most in the world, because it is cheap, bearing capacity strong and good endurance
And it is widely used in various fields.Concrete opposing surrounding medium effect also keeps its good serviceability and outward appearance for a long time
Integrity, thus maintain the ability of the use safe, normal of xoncrete structure to be referred to as durability.Concrete opposing surrounding medium is made
Ability extremely important, (cold and hot including mass exchange (such as chloride ion, sulfate ion, carbon dichloride etc.) and energy exchange
The most lower material change brought), this exchange will necessarily bring the instability of xoncrete structure and the reduction of performance, thus
Affect its endurance quality.
Super dense concrete has durability, can be oozed by water, villaumite infiltration, gas infiltration and radionuclide diffusion four
Plant different media the compactness extent of concrete is evaluated.
Summary of the invention
Present invention is primarily targeted at, it is provided that a kind of novel super dense concrete, to be solved technical problem is that
Making the complete period hydrated product which improving cement generate and structure-forming process, steel fibre is scattered in mixed with three-dimensional state
In solidifying soil, and it is a close entirety by concrete consolidation fully by the form of " bridging ", it is achieved thereby that super fine and close
Structure, thus more suitable for practicality.
The object of the invention to solve the technical problems realizes by the following technical solutions.Propose according to the present invention
One surpass dense concrete, the effective diffusion cofficient of caesium-137 ion is 4.5 × 10-5-4.8×10-5cm2/ d, villaumite permeates
Coefficient 5 × 10-19-10×10-19m2/ s, nitrogen infiltration coefficient 0.5 × 10-19-1.0×10-19m2, under 1.2-2.0MPa pressure
Water penetration height is 0, comprising: Binder Materials, aggregate, water, steel fibre and water reducer.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Preferably, aforesaid super dense concrete, wherein said Binder Materials includes cement or cement and active powder
Mixture.
Preferably, aforesaid super dense concrete, wherein said cement is P.I type cement, and strength grade is the lowest by 42.5.
Preferably, aforesaid super dense concrete, wherein said active powder is silicon ash, metakaolin and flyash,
Active powder material usage is 0-330kg/m3。
Preferably, aforesaid super dense concrete, wherein said water is 0.20-0.35 with the mass ratio of Binder Materials:
1。
Preferably, aforesaid super dense concrete, wherein said aggregate is made up of sand and stone, and sand coarse aggregate ratio is 30-40%.
Preferably, aforesaid super dense concrete, wherein said sand is common fluvial sand, and modulus of fineness is 2.60.
Preferably, aforesaid super dense concrete, the grain composition of wherein said stone is 5-10mm and 10-20mm level
Joining, wherein maximum particle diameter is less than 20mm.
Preferably, aforesaid super dense concrete, wherein said water reducer is liquid poly carboxylic acid series water reducer, water-reducing rate
Being not less than 30%, volume is the 1.5-2.5% of concrete gross mass.
Preferably, aforesaid super dense concrete, wherein said volume content of steel fibers is the 0.1-of concrete cumulative volume
2.0%, hook type steel fibers selected from copper plated steel fiber and end；Wherein copper plated steel fibre length is 12-14mm, tensile strength >=
2850MPa；End hooks type steel fibers length and is not less than 30mm, tensile strength >=800MPa.
By technique scheme, the present invention surpass dense concrete at least have the advantage that superfine active powder body
Joining and use the complete period hydrated product improving cement to generate and structure-forming process, steel fibre is scattered in three-dimensional state
In concrete, and it is a close entirety by concrete consolidation fully by the form of " bridging ", causes it is achieved thereby that super
Close structure, has good abrasion and corrosion resistance, and can contain, block radionuclide.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention,
And can be practiced according to the content of description, after describing in detail such as with presently preferred embodiments of the present invention below.
Detailed description of the invention
By further illustrating the technological means and effect that the present invention taked by reaching predetermined goal of the invention, below in conjunction with
Preferred embodiment, to its detailed description of the invention of super dense concrete, structure, feature and effect thereof of proposing according to the present invention, in detail
Describe in detail bright as after.In the following description, what different " embodiments " or " embodiment " referred to is not necessarily same embodiment.This
Outward, special characteristic, structure or the feature in one or more embodiment can be combined by any suitable form.
The one that one embodiment of the present of invention proposes surpasses dense concrete, and the effective diffusion cofficient of caesium-137 ion is
4.5×10-5-4.8×10-5cm2/ d, villaumite infiltration coefficient 5 × 10-19-10×10-19m2/ s, nitrogen infiltration coefficient 0.5 × 10-19-1.0×10-19m2, under 1.2-2.0MPa pressure, water penetration height is 0, comprising: Binder Materials, aggregate, water, steel fibre
And water reducer.
Binder Materials includes the mixture of cement or cement and active powder；Wherein cement is P.I type cement, strength grade
The lowest by 42.5.Cement can improve concrete strength, and is bonded by aggregate.
Active powder is silicon ash, metakaolin and flyash；Wherein flyash is I level flyash.
Active powder material usage is 0-330kg/m3.The granule of active powder material is little, can with filling concrete space, and
React with hydrolysis product of cement, make concrete finer and close.
Water is 0.20-0.35:1 with the mass ratio of Binder Materials.
Aggregate is made up of sand and stone, and sand coarse aggregate ratio is 30-40%.Its medium sand is common fluvial sand, and modulus of fineness is 2.60；Stone
Grain composition be 5-10mm and 10-20mm grating, wherein maximum particle diameter be less than 20mm.The granule of aggregate is big, limits coagulation
Soil shrinks.
Volume content of steel fibers is the 0.1-2.0% of concrete cumulative volume, hooks type steel fibers selected from copper plated steel fiber and end；Wherein
Copper plated steel fibre length is 12-14mm, tensile strength >=2850MPa；End hooks type steel fibers length and is not less than 30mm, tensile strength
≥800MPa.Fiber can reduce, with the anti-crack ability of Concrete Structure, the crack produced because of cement shrinkage.
Water reducer is liquid poly carboxylic acid series water reducer, and water-reducing rate is not less than 30%, and volume is the 1.5-of concrete gross mass
2.5%.Water reducer can improve the mobility reduced because adding fiber.
It is that specimen surface overdue to maintenance carries out bristle process, to eliminate the shadow of boundary effect and releasing agent that water oozes test
Ring.Must first start Anti-leakage instrument before installing test specimen, inspection machine is the most working properly.Anti-leakage instrument equipment should be able to ensure
The pressure dwell of 24h, water pressure is stably maintained at 2.0MPa.Process of the test should check infiltration feelings around test specimen at any time
Condition.Sealed test piece generally uses paraffin to seal.The condition stopping test is to reach 24h pressing time.Pressure process is noted
Whether meaning test specimen end face there is infiltration, if any infiltration, should stop the impermeability test of this test specimen, and other test specimen then proceeds test
Until 24h.End face being occurred to the test specimen of infiltration, its infiltration height is the height of test specimen, is 150mm.Forcing press is split
When splitting test specimen, should ensure that the steel filler strip placed up and down is parallel to each other, and be in same vertical plane, and test specimen two should be placed on
At the diameter of end face, to ensure that splitting surface is vertical with end face and to be easy to accurately measure infiltration height.When the measurement of permeated height,
If running into certain measuring point during reading to be stopped by aggregate, this measuring point can be replaced near the infiltration height average at aggregate two ends
Infiltration height.The reading of permeated height should be accurate to 0.1mm.
Nitrogen penetration testing is that test specimen cuts into Φ 150mm × 50mm cake；60 DEG C of baking ovens 25 put into by test specimen after weighing
My god, then weigh；Test specimen is placed in relative humidity 60%, creeping indoor 22 days of temperature 20 DEG C.According to the CEMBUREAU improved
Method carries out gas permeability test, specifically comprises the following steps that epoxy resin is smeared to ensure to seal in test specimen side；Weigh test specimen matter
Amount, thickness；Test specimen is put into osmometer pressure chamber, applies confined pressure (7bar)；Apply inlet pressure, treat that gas flow rate is stable
Rear measurement volume flow rate；Change admission pressure, repeated measure；After having measured the situation under all pressure ratings, in release instrument
Residual gas, takes out test specimen, again weighs, and completes to measure.Analysis and arrangement data, under the conditions of calculating different pressures, test specimen is apparent oozes
COEFFICIENT K thoroughlyA, and utilize following formula to return out Intrinsic Permeation COEFFICIENT KV:
Villaumite infiltration be by chloride ion transport test carry out, test specimen processing after should polish smooth, make surface of test piece smooth,
It is easily installed and removes surface irregularities.Its size is measured again after surface of test piece process is smooth.Vacuum pump should ensure that Dewar vessel
Absolute pressure within a few minutes, reach 10～50mbar (1～5KPa).It is noted that the ability of its evacuation when choosing vacuum pump.
Soak test specimen is sodium chloride solution.Adjust voltage according to initial current, re-record according to the voltage after adjusting new initial
Electric current.Duration of test runs is determined according to new initial current.Initial temperature in record anolyte, records anolyte
Final temperature, computation migration coefficient use.Record ultimate current, observes curent change situation.
After radionuclide Cs-137 diffusion coefficients method is concrete test block maintenance, at room temperature, test block is complete
Entirely it is immersed in tap water, stands 30 days.Being polished smooth by the upper and lower end face buffing machine of test block, surface roughness is less than
0.02mm.Test block is put in polytetrafluoroethylene sleeve, injection ring epoxy resins in the gap between test block and sleeve, and in room
Temperature is lower to be dried, it is ensured that liquid will not from gap seepage.The polytetrafluoroethylene sleeve that will be equipped with test block is fixed on source liquid pool and sample
Between product collecting pit, in source liquid pool and sample collection pond, inject saturated Ca (OH)2Solution, stands 7 days, has seen whether liquid
Seepage.Solution in the liquid pool of source is poured out, then injects the saturated Ca (OH) containing Cs-137 in the liquid pool of source2Solution 2L；At source liquid pool
Middle addition 1mL activity concentration is the HTO of 50000Bq/mL, opens magnet rotor agitator, makes solution be sufficiently mixed uniformly.Every
Within 15 days, take 0.1ml aqueous solution from source liquid pool, measure Cs-137 concentration with gamma spectrometer.Periodically from sample collection pond, take 1mL water
Solution, measures the concentration of wherein H-3 and Cs-137.After taking sample from sample collection pond, supplement the full of same volume every time
With Ca (OH)2Solution.After diffusion experiment stable operation 210 days, carefully remove source liquid pool and sample collection pond, with saturated Ca (OH)2
The upper and lower end face of test block is rinsed by solution, takes off polytetrafluoroethylene sleeve, then with saturated Ca (OH)2Solution is rinsed,
Stand in the cool and air-dry.Air-dried test block is weighed, measures height, then start vertically from the one end contacted with source liquid pool
Carry out grinding, after having ground certain thickness, then test block is weighed, measure height；Powder is collected by grinding process,
Powder weighing, calculated yield, powder-like is carried out Cs-137 activity measurement.Repeat test block is carried out successively grinding, until powder
Sample does not measures Cs-137.
Composition and the parameter of concrete are as shown in table 1.
The composition of table 1 concrete and parameter
The above, be only presently preferred embodiments of the present invention, the present invention not makees any pro forma restriction, depends on
Any simple modification, equivalent variations and the modification made above example according to the technical spirit of the present invention, all still falls within this
In the range of bright technical scheme.
Claims (10)
1. a super dense concrete, it is characterised in that: the effective diffusion cofficient of caesium-137 ion is 4.5 × 10-5-4.8×10- 5cm2/ d, villaumite infiltration coefficient 5 × 10-19-10×10-19m2/ s, nitrogen infiltration coefficient 0.5 × 10-19-1.0×10-19m2,
Under 1.2-2.0MPa pressure, water penetration height is 0, comprising: Binder Materials, aggregate, water, steel fibre and water reducer.
Super dense concrete the most according to claim 1, it is characterised in that described Binder Materials includes cement or cement
Mixture with active powder.
Super dense concrete the most according to claim 2, it is characterised in that described cement is P.I type cement, intensity etc.
Level is the lowest by 42.5.
Super dense concrete the most according to claim 2, it is characterised in that described active powder is silicon ridge grey, higher
Soil and flyash, active powder material usage is 0-330kg/m3。
Super dense concrete the most according to claim 1, it is characterised in that described water with the mass ratio of Binder Materials is
0.20-0.35:1.
Super dense concrete the most according to claim 1, it is characterised in that described aggregate is made up of sand and stone, sand
Rate is 30-40%.
Super dense concrete the most according to claim 6, it is characterised in that described sand is common fluvial sand, modulus of fineness
It is 2.60.
Super dense concrete the most according to claim 6, it is characterised in that the grain composition of described stone is 5-10mm
With 10-20mm grating, wherein maximum particle diameter is less than 20mm.
Super dense concrete the most according to claim 1, it is characterised in that described water reducer is that liquid polycarboxylic-acid subtracts
Water preparation, water-reducing rate is not less than 30%, and volume is the 1.5-2.5% of concrete gross mass.
Super dense concrete the most according to claim 1, it is characterised in that described volume content of steel fibers is that concrete is total
The 0.1-2.0% of volume, hooks type steel fibers selected from copper plated steel fiber and end；Wherein copper plated steel fibre length is 12-14mm, tension
Intensity >=2850MPa；End hooks type steel fibers length and is not less than 30mm, tensile strength >=800MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610664360.0A CN106278037B (en) | 2016-08-12 | 2016-08-12 | Super dense concrete |
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| CN201610664360.0A CN106278037B (en) | 2016-08-12 | 2016-08-12 | Super dense concrete |
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| CN106278037A true CN106278037A (en) | 2017-01-04 |
| CN106278037B CN106278037B (en) | 2018-03-09 |
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| CN201610664360.0A Active CN106278037B (en) | 2016-08-12 | 2016-08-12 | Super dense concrete |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110818362A (en) * | 2019-12-17 | 2020-02-21 | 郑州市雷德水泥制品有限公司 | Pole pumping concrete and preparation method thereof |
| CN111662049A (en) * | 2019-03-07 | 2020-09-15 | 北京万之悦科技发展有限公司 | High-strength cement-based radioactive waste curing and fixing material |
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| CN101172824A (en) * | 2007-10-16 | 2008-05-07 | 南京航空航天大学 | Three-dimensional orientation fibre-reinforced cement base composite material |
| CN102219459A (en) * | 2011-04-02 | 2011-10-19 | 武汉理工大学 | Radiation shield concrete and preparation method thereof |
| CN103864372A (en) * | 2014-03-24 | 2014-06-18 | 中国建筑材料科学研究总院 | Hybrid fiber reinforced concrete high integrity container for disposal of radioactive materials and preparation method thereof |
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2016
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| CN101172824A (en) * | 2007-10-16 | 2008-05-07 | 南京航空航天大学 | Three-dimensional orientation fibre-reinforced cement base composite material |
| CN102219459A (en) * | 2011-04-02 | 2011-10-19 | 武汉理工大学 | Radiation shield concrete and preparation method thereof |
| CN103864372A (en) * | 2014-03-24 | 2014-06-18 | 中国建筑材料科学研究总院 | Hybrid fiber reinforced concrete high integrity container for disposal of radioactive materials and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111662049A (en) * | 2019-03-07 | 2020-09-15 | 北京万之悦科技发展有限公司 | High-strength cement-based radioactive waste curing and fixing material |
| CN111662049B (en) * | 2019-03-07 | 2021-03-19 | 北京万之悦科技发展有限公司 | High-strength cement-based radioactive waste curing and fixing material |
| CN110818362A (en) * | 2019-12-17 | 2020-02-21 | 郑州市雷德水泥制品有限公司 | Pole pumping concrete and preparation method thereof |
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| CN106278037B (en) | 2018-03-09 |
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