CN105776968A - High-strength concrete with fire resistance and burst resistance and preparation method thereof - Google Patents
High-strength concrete with fire resistance and burst resistance and preparation method thereof Download PDFInfo
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- CN105776968A CN105776968A CN201610079682.9A CN201610079682A CN105776968A CN 105776968 A CN105776968 A CN 105776968A CN 201610079682 A CN201610079682 A CN 201610079682A CN 105776968 A CN105776968 A CN 105776968A
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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
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00482—Coating or impregnation materials
- C04B2111/00551—Refractory coatings, e.g. for tamping
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Abstract
The invention provides high-strength concrete with fire resistance and burst resistance and a preparation method thereof.The concrete is prepared from, by weight, 20-23 parts of cement, 7.2-7.5 parts of water, 15-18 parts of natural medium sand, 40-42 parts of natural pebble, 11.5-14 parts of glass aggregate, 0.03-0.05 part of polypropylene fibers and 0.5-2.5 parts of steel fibers.According to the high-strength concrete, the optimum added quantity range of the polypropylene fibers and the steel fibers is determined, and on the premise of improving the fire resistance and burst resistance of the high-strength concrete, the use quantity and production cost of the fibers are reduced, and the influence on the strength of the high-strength concrete is reduced.
Description
Technical field
The invention belongs to field of constructional engineering material, be specifically related to a kind of high-strength coagulation with fire resistance and explosion-proof fragility
Soil and preparation method thereof.
Background technology
High-strength concrete is compared with normal concrete, and structure is more densely cross-linked, and permeability is low, and fragility is bigger, thus results in it
Fire resistance is poor.When especially fire occurs, there is Decrepitation Phenomena the most at high operating temperatures in high-strength concrete, limits it and make
Use scope.From the point of view of the achievement that oneself obtains from current blending fiber concrete, though the research ground zero of fiber hybrid concrete, but
Tentatively show that the performance of concrete is improved significantly by blending fiber, great development prospect.But it is fine in blending fiber
The consumption of dimension is the most the more the better, and fiber consumption too much can affect the intensity of concrete.Additionally, the change of aggregate is resistance to concrete
The research of fire and explosion-proof performance, also in the exploratory stage, is currently mainly used refractory aggregate to improve the fire-resistant of concrete
Property, but the fire resistance of concrete is promoted limited by it, and smaller to explosion-proof performance boost.Therefore, prior art is to high-strength
The fire resistance of concrete and the improvement effect of explosion-proof fragility are poor.
Summary of the invention
In order to overcome the defect of prior art, the present invention provides a kind of high-strength concrete with fire resistance and explosion-proof fragility
And preparation method thereof.
Therefore, it is an object of the present invention to provide a kind of high-strength concrete with fire resistance and explosion-proof fragility.
It is a further object to provide the method preparing above-mentioned high-strength concrete.
The technical scheme realizing the object of the invention is as follows:
On the one hand, the present invention provides a kind of high-strength concrete with fire resistance and explosion-proof fragility, and this concrete is by as follows
The raw material of parts by weight is made:
Preferably, in above-mentioned concrete, in parts by weight, described steel fibre is 1-2 part, more preferably 1.46 parts.
Preferably, above-mentioned concrete is made up of the raw material of following parts by weight:
It is highly preferred that above-mentioned concrete is made up of the raw material of following parts by weight:
Preferably, in above-mentioned concrete, described cement is selected from Portland cement；It is highly preferred that described cement is selected from
P.O 42.5 Portland cement；It is further preferred that described cement is general selected from the P.O 42.5 without lime rock compound
Logical portland cement.
Preferably, in above-mentioned concrete, described glass aggregate is selected from smashing waste glass aggregate；It is highly preferred that described glass
Glass aggregate is selected from graded crushing scrap glass aggregate；It is further preferred that described glass aggregate is selected from and nature medium sand fineness mould
The graded crushing scrap glass aggregate that number is identical.
Preferably, in above-mentioned concrete, described polypropylene fibre is 8-16mm selected from fibre length, gathering of a diameter of 18 μm
Tacryl；It is highly preferred that described polypropylene fibre is 12mm selected from fibre length, the polypropylene fibre of a diameter of 18 μm.
Preferably, in above-mentioned concrete, described steel fibre is selected from a length of 30-40mm, and equivalent diameter is the end of 0.55mm
Hook type steel fibers；It is highly preferred that described steel fibre is selected from a length of 35mm, equivalent diameter is that the end of 0.55mm hooks type steel fibers.
On the other hand, the present invention provides the preparation method of a kind of above-mentioned concrete, and the method comprises the steps:
1) nature medium sand, glass aggregate, natural gravel and cement are pressed formula rate and adds concrete mixer, such as
In HJW-60 type concrete mixer, stir the 10-30 second；
2) to step 1) product that obtains adds the 40-60% (mass fraction) of steel fibre formula ratio and gathering of formula ratio
Tacryl, then stirring 10-30 second；
3) to step 2) product that obtains adds the water of formula ratio, then stirring 50-70 second；
4) to step 3) product that obtains adds remaining steel fibre, then stirring 50-70 second；
5) by step 4) after the cast of the product that obtains at 20 DEG C form removal, then normal temperature maintenance 28 days after maintenance 24 hours,
Obtain.
Preferably, step 1) in stirring time be the 15-25 second；It is highly preferred that step 1) in time of stirring be 20 seconds.
Preferably, step 2) the middle 45-55% (mass fraction) adding steel fibre formula ratio；It is highly preferred that step 2) in
Add 50% (mass fraction) of steel fibre formula ratio.
Preferably, step 2) in stirring time be the 15-25 second；It is highly preferred that step 2) in time of stirring be 20 seconds.
Preferably, step 3) in stirring time be the 55-65 second；It is highly preferred that step 3) in time of stirring be 60 seconds.
Preferably, step 4) in stirring time be the 55-65 second；It is highly preferred that step 4) in time of stirring be 60 seconds.
In a specific embodiment, the preparation method of described concrete is as follows:
1) 4kg nature medium sand, 3kg glass aggregate, 9.78kg natural gravel and 5.18kg cement are added concrete-agitating
In machine, stir 20 seconds；
2) to step 1) product that obtains adds 9.6g polypropylene fibre and 175g steel fibre, then stirring 20 seconds；
3) to step 2) product that obtains adds 1.75kg water, then stirring 60 seconds；
4) to step 3) product that obtains adds 175g steel fibre, then stirring 60 seconds；
5) by step 4) after the cast of the product that obtains at 20 DEG C form removal, then normal temperature maintenance 28 days after maintenance 24 hours,
Obtain.
The concrete of the present invention not only increases the fire resistance of high-strength concrete, also improves its explosion-proof performance, to height
The lifting of reinforced concrete service behaviour and the expansion of the scope of application have important meaning.
Fibers content not only fire resistance and explosion-proof fragility to concrete has an impact, and also can affect high-strength concrete itself
Intensity.Present invention determine that the optimum mix amount scope of polypropylene fibre and steel fibre, improved high-strength concrete fire resistance and preventing
On the premise of burst, reduce fiber usage amount and production cost, decrease the impact on strength of high strength concrete.
Present invention uses glass aggregate, to reducing, Cost of Concrete, raising utilization rate of solid waste and resource are the most sharp
With there being positive role.The preparation method of concrete that the present invention uses, can improve the dispersion effect of polypropylene fibre and steel fibre
Really, the fiber reunion impact on concrete performance is reduced.
Detailed description of the invention
Being further described in detail the present invention below in conjunction with detailed description of the invention, the embodiment be given is only for explaining
The bright present invention rather than in order to limit the scope of the present invention.
Unless otherwise defined, to be the P.O 42.5 without lime rock compound general for the cement used in following example
Logical portland cement；The glass aggregate used is the graded crushing scrap glass bone identical with nature medium sand modulus of fineness
Material；It is 12mm that the polypropylene fibre used is fibre length, the polypropylene fibre of a diameter of 18 μm；The steel fibre used
Being a length of 35mm, equivalent diameter is that the end of 0.55mm hooks type steel fibers.
Embodiment 1The concrete of the present invention
A kind of high-strength concrete with fire resistance and explosion-proof fragility, this concrete is made up of raw material that filling a prescription as follows:
The preparation method of above-mentioned concrete is as follows:
1) 4kg nature medium sand, 3kg glass aggregate, 9.78kg natural gravel and 5.18kg cement are added concrete-agitating
In machine, stir 20 seconds；
2) to step 1) product that obtains adds 9.6g polypropylene fibre and 175g steel fibre, then stirring 20 seconds；
3) to step 2) product that obtains adds 1.75kg water, then stirring 60 seconds；
4) to step 3) product that obtains adds remaining steel fibre, then stirring 60 seconds；
5) by step 4) after the cast of the product that obtains at 20 DEG C form removal, then normal temperature maintenance 28 days after maintenance 24 hours,
Obtain.
Embodiment 2The concrete of the present invention
A kind of high-strength concrete with fire resistance and explosion-proof fragility, this concrete is made up of raw material that filling a prescription as follows:
The preparation method of above-mentioned concrete is as follows:
1) 4.1kg nature medium sand, 2.89kg glass aggregate, 9.64kg natural gravel and 5.3kg cement are added concrete
In mixer, stir 25 seconds；
2) to step 1) product that obtains adds 9.5g polypropylene fibre and 175g steel fibre, then stirring 15 seconds；
3) to step 2) product that obtains adds 1.75kg water, then stirring 60 seconds；
4) to step 3) product that obtains adds remaining steel fibre, then stirring 60 seconds；
5) by step 4) after the cast of the product that obtains at 20 DEG C form removal, then normal temperature maintenance 28 days after maintenance 24 hours,
Obtain.
Embodiment 3The concrete of the present invention
A kind of high-strength concrete with fire resistance and explosion-proof fragility, this concrete is made up of raw material that filling a prescription as follows:
The preparation method of above-mentioned concrete is as follows:
1) 4.2kg nature medium sand, 2.9kg glass aggregate, 10.1kg natural gravel and 4.8kg cement addition concrete is stirred
Mix in machine, stir 20 seconds；
2) to step 1) product that obtains adds 9.5g polypropylene fibre and 115g steel fibre, then stirring 30 seconds；
3) to step 2) product that obtains adds 1.73kg water, then stirring 50 seconds；
4) to step 3) product that obtains adds remaining steel fibre, then stirring 60 seconds；
5) by step 4) after the cast of the product that obtains at 20 DEG C form removal, then normal temperature maintenance 28 days after maintenance 24 hours,
Obtain.
Embodiment 4The concrete of the present invention
A kind of high-strength concrete with fire resistance and explosion-proof fragility, this concrete is made up of raw material that filling a prescription as follows:
The preparation method of above-mentioned concrete is as follows:
1) 3.6kg nature medium sand, 3.1kg glass aggregate, 9.6kg natural gravel and 5.5kg cement addition concrete is stirred
Mix in machine, stir 10 seconds；
2) to step 1) product that obtains adds 9.5g polypropylene fibre and 175g steel fibre, then stirring 20 seconds；
3) to step 2) product that obtains adds 1.8kg water, then stirring 70 seconds；
4) to step 3) product that obtains adds remaining steel fibre, then stirring 60 seconds；
5) by step 4) after the cast of the product that obtains at 20 DEG C form removal, then normal temperature maintenance 28 days after maintenance 24 hours,
Obtain.
Embodiment 5Strength test is tested
Measure the compression strength of the concrete test block prepared by embodiment 1,2,3,4 the most respectively and overdo strong
Degree, and the data recorded are listed in table 1.
The assay method of compression strength: using NYL-60 type concrete strength test machine, concrete test block is from maintenance place
After taking-up, test block surface is wiped clean with upper and lower bearing plate face.Test block is placed in concrete strength test machine lower platen or
On backing plate, the pressure-bearing surface of test block is vertical with end face during shaping.The center of test specimen is directed at testing machine lower platen center, starts examination
Test machine, when top board and test specimen or billet close to time, adjust ball seat, make contact equalize.Continuous uniform is answered in process of the test
Ground loading, each second 0.8MPa.
Cross the assay method of fire intensity: the concrete test block prepared is placed 60min in the Muffle furnace of 600 DEG C,
Take out, naturally measured fire intensity according to the assay method of above-mentioned compression strength after cooling.
Table 1
Screening experiment 1
A kind of high-strength concrete with fire resistance and explosion-proof fragility, this concrete is made up of raw material that filling a prescription as follows:
In above-mentioned concrete, the fibre length of described polypropylene fibre is respectively 8mm, 10mm, 12mm, 14mm, 16mm, directly
Footpath is 18 μm, numbered S1, S2, S3, S4, S5 of corresponding concrete test block.
The preparation method of above-mentioned concrete is as follows:
1) 4kg nature medium sand, 3kg glass aggregate, 9.78kg natural gravel and 5.18kg cement are added concrete-agitating
In machine, stir 20 seconds；
2) to step 1) product that obtains adds 9.6g polypropylene fibre and 175g steel fibre, then stirring 20 seconds；
3) to step 2) product that obtains adds 1.75kg water, then stirring 60 seconds；
4) to step 3) product that obtains adds remaining steel fibre, then stirring 60 seconds；
5) by step 4) after the cast of the product that obtains at 20 DEG C form removal, then normal temperature maintenance 28 days after maintenance 24 hours,
Obtain.
Measure the compression strength of concrete test block S1, S2, S3, S4, S5 respectively according to the method described in embodiment 5 and overdo
Intensity, and data measured is listed in table 2.
Table 2
From Table 2, it can be seen that S3 concrete test block 28d compression strength is only smaller than S4 concrete test block；But, by coagulation
Soil test block maintains the intensity down ratio intensity less than S4 concrete test block of 60min, S3 concrete test block under 600 degrees Celsius
Down ratio.Therefore, when fibre length is 12mm, concrete strength and fire intensity excessively are optimal.
Screening experiment 2
A kind of high-strength concrete with fire resistance and explosion-proof fragility, this concrete is made up of raw material that filling a prescription as follows:
In above-mentioned concrete, the length of described steel fibre is respectively 30mm, 35mm, 40mm, and equivalent diameter is 0.55mm's
End hooks type steel fibers, corresponding concrete test block numbered S1, S2, S3.
The preparation method of above-mentioned concrete is as follows:
1) 4kg nature medium sand, 3kg glass aggregate, 9.78kg natural gravel and 5.18kg cement are added concrete-agitating
In machine, stir 20 seconds；
2) to step 1) product that obtains adds 9.6g polypropylene fibre and 175g steel fibre, then stirring 20 seconds；
3) to step 2) product that obtains adds 1.75kg water, then stirring 60 seconds；
4) to step 3) product that obtains adds remaining steel fibre, then stirring 60 seconds；
5) by step 4) after the cast of the product that obtains at 20 DEG C form removal, then normal temperature maintenance 28 days after maintenance 24 hours,
Obtain.
The method described in embodiment 5 of employing, measures the anti-of concrete test block S1, S2, S3 prepared by this screening experiment respectively
Compressive Strength and excessively fire intensity, and data measured is listed in table 3.
Table 3
| S1 | S2 | S3 | |
| Compression strength (MPa) | 76.55 | 79.25 | 75.87 |
| Cross fire intensity (MPa) | 65.87 | 69.82 | 64.32 |
From table 3 it is observed that S2 concrete test block 28d compression strength is maximum；By concrete test block under 600 degrees Celsius
60min, S2 concrete is maintained to cross fire intensity down ratio less than other concrete test block.Therefore when length of steel fiber is 35mm,
Concrete strength and fire intensity excessively are optimal.
Screening experiment 3
Steel fibre weight in concrete, respectively 120g, 240g, 350g, 480g, 600g, specimen coding be respectively G1,
G2, G3, G4, G5, be not added with the numbered G0 of concrete sample of steel fibre.
Other raw material of concrete composition is as follows:
The preparation method of above-mentioned concrete is as follows:
1) 4kg nature medium sand, 3kg glass aggregate, 9.78kg natural gravel and 5.18kg cement are added in mixer, stir
Mix 25 seconds；
2) to step 1) steel that adds 9.6g polypropylene fibre and 50% (mass fraction) formula ratio in the product that obtains is fine
Dimension, then stirring 15 seconds；
3) to step 2) product that obtains adds 1.75kg water, then stirring 60 seconds；
4) to step 3) product that obtains adds remaining steel fibre, then stirring 60 seconds；
5) by step 4) after the cast of the product that obtains at 20 DEG C form removal, then normal temperature maintenance 28 days after maintenance 24 hours,
Obtain.
The method described in embodiment 5 of employing, measure respectively concrete test block G0 prepared by the present embodiment, G1, G2, G3, G4,
The compression strength of G5 and excessively fire intensity, and data measured is listed in table 4.
Table 4
| G0 | G1 | G2 | G3 | G4 | G5 | |
| Compression strength (MPa) | 76.77 | 77.88 | 78.54 | 79.25 | 79.12 | 73.64 |
| Cross fire intensity (MPa) | 58.24 | 63.85 | 66.74 | 69.82 | 68.42 | 61.88 |
As can be seen from Table 4, along with the increase of volume content of steel fibers, concrete 28d intensity is fallen after rising.G1 strong concrete
Spending less, G4 intensity begins to decline, and G5 concrete declines rapidly bigger.
Above-mentioned concrete test block maintains under 600 degrees Celsius 60min, and it is the lowest that G1, G5 concrete test block crosses fire intensity
In G2, G3, G4 concrete test block, wherein to cross fire intensity the highest for G3 concrete test block.
Condition gropes to test 1
A kind of high-strength concrete with fire resistance and explosion-proof fragility, this concrete is made up of raw material that filling a prescription as follows:
The preparation method of above-mentioned concrete is as follows:
1) 4.1kg nature medium sand, 2.89kg glass aggregate, 9.64kg natural gravel and 5.3kg cement are added concrete
In mixer, stir 20 seconds；
2) to step 1) product that obtains adds 9.5g polypropylene fibre and 350g steel fibre, then stirring 20 seconds；
3) to step 2) product that obtains adds 1.75kg water, then stirring 120 seconds；
4) by step 3) after the cast of the product that obtains at 20 DEG C form removal, then normal temperature maintenance 28 days after maintenance 24 hours,
Obtain.
Compared with Example 2, steel fibre is in step 2) in disposable all add.Concrete test block 28d intensity compares reality
Execute example 2 and decline 8.7%., cross fire intensity and decline 7.1%
Contrast experiment 1
Concrete made by raw material according to the following formulation:
Its preparation method is: 1) by 7.5kg river sand, 0.1kg high performance water reducing agent of polyocarboxy acid, 20.3kg basaltic broken stone and
5kg portland cement adds in concrete mixer, stirs 25 seconds；
2) to step 1) product that obtains adds 0.25kg polypropylene fibre and 0.15kg steel fibre, then stir 15
Second；
3) to step 2) product that obtains adds 2kg water, then stirring 120 seconds；
4) by step 4) after the cast of the product that obtains at 20 DEG C form removal, then normal temperature maintenance 28 days after maintenance 24 hours,
Obtain.
Contrast experiment 2
Concrete made by raw material according to the following formulation:
Its preparation method is: 1) by 7.5kg river sand, 0.5kg high performance water reducing agent of polyocarboxy acid, 15kg basaltic broken stone and
5kg portland cement adds in concrete mixer, stirs 25 seconds；
2) to step 1) product that obtains adds 1kg polypropylene fibre and 0.5kg steel fibre, then stirring 15 seconds；
3) to step 2) product that obtains adds 2kg water, then stirring 60 seconds；
4) to step 3) product that obtains adds remaining steel fibre, then stirring 60 seconds
5) by step 4) after the cast of the product that obtains at 20 DEG C form removal, then normal temperature maintenance 28 days after maintenance 24 hours,
Obtain.
Contrast experiment 3
Concrete made by raw material according to the following formulation:
Said components is stirred in mixer 120 seconds to being sufficiently mixed, after cast, at 20 DEG C, maintenance was torn open after 24 hours
Mould, then normal temperature maintenance 28 days, to obtain final product.
Contrast experiment 4
Concrete made by raw material according to the following formulation:
Said components is stirred in mixer 120 seconds to being sufficiently mixed, after cast, at 20 DEG C, maintenance was torn open after 24 hours
Mould, then normal temperature maintenance 28 days, to obtain final product.
Use the method described in embodiment 5, measure contrast experiment 1, contrast experiment 2, contrast experiment 3 and contrast experiment respectively
The compression strength of the concrete prepared by 4 and excessively fire intensity, and data measured is listed in table 5.
Table 5
| Contrast experiment 1 | Contrast experiment 2 | Contrast experiment 3 | Contrast experiment 4 | |
| Compression strength (MPa) | 32.0 | 34.5 | 32.7 | 33.9 |
| Cross fire intensity (MPa) | 26.7 | 28.4 | 26.9 | 27.9 |
As can be seen from Table 5, the concrete of contrast experiment 1, concrete 28d compression strength is 32MPa, 600 degrees Celsius
Lower maintenance 60min, crosses fire intensity and declines 16.5%.In contrast experiment 2, proportion of fibers improves, and compression strength and fire intensity excessively are equal
Increase.It is the most poor that contrast experiment 3 and 4 is provided without the forming method of the present invention, compression strength and fire intensity excessively.
Owing to fire resistance and the explosion-proof fragility of strong concrete are poorer than weak concrete natively, and in the present invention
Strong concrete is crossed fire intensity and is declined the least, fully demonstrates effectiveness of the invention.
The present invention compared to existing technology, improves the fire resistance of strong concrete and explosion-proof fragility, and uses part glass
Glass aggregate replaces natural sand, reduces the recycling of production cost, beneficially solid waste.
Claims (9)
1. having fire resistance and a high-strength concrete for explosion-proof fragility, this concrete is made up of the raw material of following parts by weight:
Concrete the most according to claim 1, wherein, in terms of parts by weight, described steel fibre is 1-2 part, is preferably
1.46 part.
Concrete the most according to claim 1 and 2, wherein said concrete is made up of the raw material of following parts by weight:
It is highly preferred that described concrete is made up of the raw material of following parts by weight:
4., according to the concrete according to any one of claim 1-3, described cement is selected from Portland cement；Preferably,
Described cement is selected from P.O 42.5 Portland cement；It is highly preferred that described cement is selected from the P.O without lime rock compound
42.5 Portland cements.
5., according to the concrete according to any one of claim 1-4, wherein said glass aggregate is selected from smashing waste glass bone
Material；Preferably, described glass aggregate is selected from graded crushing scrap glass aggregate；It is highly preferred that described glass aggregate is selected from and sky
The graded crushing scrap glass aggregate that so medium sand modulus of fineness is identical.
6., according to the concrete according to any one of claim 1-5, wherein said polypropylene fibre is 8-selected from fibre length
16mm, the polypropylene fibre of a diameter of 18 μm；It is highly preferred that described polypropylene fibre is 12mm selected from fibre length, a diameter of
The polypropylene fibre of 18 μm.
7., according to the concrete according to any one of claim 1-6, wherein said steel fibre is selected from a length of 30-40mm, etc.
The end imitating a diameter of 0.55mm hooks type steel fibers；It is highly preferred that described steel fibre is selected from a length of 35mm, equivalent diameter is
The end of 0.55mm hooks type steel fibers.
8. a preparation method for the concrete according to any one of claim 1-7, the method comprises the steps:
1) nature medium sand, glass aggregate, natural gravel and cement are pressed formula rate and adds concrete mixer, such as HJW-60
In type concrete mixer, stir the 10-30 second；
2) to step 1) product that obtains adds 40-60% (mass fraction) and the polypropylene of formula ratio of steel fibre formula ratio
Fiber, then stirring 10-30 second；
3) to step 2) product that obtains adds the water of formula ratio, then stirring 50-70 second；
4) to step 3) product that obtains adds remaining steel fibre, then stirring 50-70 second；
5) by step 4) form removal after maintenance 24 hours at 20 DEG C after the cast of the product that obtains, then normal temperature maintenance 28 days, to obtain final product.
Method the most according to claim 8, wherein step 1) in stirring time be the 15-25 second；It is highly preferred that step 1)
The time of middle stirring is 20 seconds；
Preferably, step 2) the middle 45-55% (mass fraction) adding steel fibre formula ratio；It is highly preferred that step 2) middle addition
50% (mass fraction) of steel fibre formula ratio；
Preferably, step 2) in stirring time be the 15-25 second；It is highly preferred that step 2) in time of stirring be 20 seconds；
Preferably, step 3) in stirring time be the 55-65 second；It is highly preferred that step 3) in time of stirring be 60 seconds；
Preferably, step 4) in stirring time be the 55-65 second；It is highly preferred that step 4) in time of stirring be 60 seconds.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109133745A (en) * | 2018-09-04 | 2019-01-04 | 江苏兆佳建材科技有限公司 | A kind of explosion-proof fragility concrete of high fire resisting |
| CN110577393A (en) * | 2019-10-25 | 2019-12-17 | 常州大学 | High-impact-resistance concrete material and preparation and maintenance methods thereof |
| CN111410449A (en) * | 2020-03-27 | 2020-07-14 | 芜湖市骏辰新型材料有限公司 | High-strength composite filler for concrete and preparation method and application thereof |
| CN112592134A (en) * | 2020-12-24 | 2021-04-02 | 广州朋悦建材科技发展有限公司 | UHPC with strong explosion resistance and high fire resistance as well as preparation method and application thereof |
| CN115246724A (en) * | 2022-06-23 | 2022-10-28 | 泰州金盾特种防火门有限公司 | Explosion venting material and application thereof in special door |
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| CN103086655A (en) * | 2011-11-04 | 2013-05-08 | 香港理工大学 | Method for preparing concrete brick |
| CN104058677A (en) * | 2013-03-20 | 2014-09-24 | 宏润建设集团股份有限公司 | Steel fiber composite concrete member and preparation process thereof |
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| CN112592134A (en) * | 2020-12-24 | 2021-04-02 | 广州朋悦建材科技发展有限公司 | UHPC with strong explosion resistance and high fire resistance as well as preparation method and application thereof |
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