CN108821699A - A kind of skyscraper high-strength concrete - Google Patents
A kind of skyscraper high-strength concrete Download PDFInfo
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- CN108821699A CN108821699A CN201810914976.8A CN201810914976A CN108821699A CN 108821699 A CN108821699 A CN 108821699A CN 201810914976 A CN201810914976 A CN 201810914976A CN 108821699 A CN108821699 A CN 108821699A
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- strength concrete
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- skyscraper
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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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/38—Fibrous materials; Whiskers
- C04B14/48—Metal
-
- 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
- C04B16/00—Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B16/04—Macromolecular compounds
- C04B16/06—Macromolecular compounds fibrous
- C04B16/0616—Macromolecular compounds fibrous from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B16/0625—Polyalkenes, e.g. polyethylene
-
- 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
- C04B28/06—Aluminous 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Civil Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a kind of skyscraper high-strength concretes.Its component match ratio is cement 360-390Kg/m3, slag micropowder 70-80Kg/m3, silicon powder 30-45Kg/m3, fine aggregate 620-690Kg/m3, coarse aggregate 1000-1150Kg/m3, water 160-190Kg/m3, water-reducing agent 5-8Kg/m3, composite fibre 1-3Kg/m3.The steel fibre and high-elastic polyethylene fibre composition that the present invention uses are three-dimensional disorderly to supporting network, compensate for the initial imperfection of concrete to a certain extent, enhance the anti-pressure ability of matrix, bending strength and toughness.
Description
Technical field
The invention belongs to technical field of buildings, and in particular to a kind of skyscraper high-strength concrete.
Background technique
High-strength concrete is using the mines such as the additives such as cement, sand, stone, high efficiency water reducing agent and flyash ultrafine slag silicon ash
C50~C80 grade concrete that polymer blends material is prepared with common process.High-strength concrete is as a kind of new construction material, with it
The superiority that compression strength is high, non-deformability is strong, density is big, porosity is low, in high building structure, long-span bridge girder construction
And it is widely used in certain unique constructions.The feature of high-strength concrete maximum is compression strength height, generally commonly
Mixed 4~6 times for doubting soil of intensity, therefore the section of component can be reduced, therefore optimum is used for skyscraper.Experiments have shown that certain
Axial compression ratio and suitable stirrup ratio in the case of, high strength reinforced concrete frame columns have preferable anti-seismic performance.And column section ruler
Very little reduction mitigates self weight, avoids short column, also advantageous to earthquake-resistant structure, and improves economic benefit.
High-strength concrete material provides advantage for prestressing technique, and high strength steel can be used and artificial control is answered
Power, to greatly increase the bending stiffness and crack resistance of flexural member.Therefore it uses and applies more and more in world wide
The High Strength Concrete Structures of Prestressing are applied in large span house and bridge.In addition, big using high-strength concrete density
Feature can be used as building the buildings or structures absorbed impact with explosive load, such as atomic reactor basis.It is mixed using high-strength
The feature that solidifying soil anti-permeability performance is strong and corrosion resistance is strong, builds the industrial pond etc. that there is high-impermeable and highly resistance corruption to require.
High-strength concrete has obtained in entire civil engineering extensively since it has many advantages, such as that intensity is high, frost resistance is good
Using and achieve good economic benefit, but easy to crack is its disadvantage, this disadvantage greatly limits high-strength concrete
Further genralrlization and application.
Summary of the invention
The purpose of the present invention is to provide a kind of skyscraper high-strength concretes.
A kind of skyscraper high-strength concrete, component match ratio are cement 360-390Kg/m3, slag micropowder 70-
80Kg/m3, silicon powder 30-45Kg/m3, fine aggregate 620-690Kg/m3, coarse aggregate 1000-1150Kg/m3, water 160-190Kg/m3,
Water-reducing agent 5-8Kg/m3, composite fibre 1-3Kg/m3。
The cement is ferrous aluminate cement or portland cement, and the particle diameter before aquation is between 10~25 μm.
The fine aggregate selects medium coarse sands clean, that fineness modulus is 2.6~3.2.
The coarse aggregate is rubble, and particle diameter is between 5~25 ㎜.
The water-reducing agent is naphthalene sulfonate based water reducer NNO or MF.
The composite fibre includes one or both of steel fibre, high-elastic polyethylene fibre.
The high-strength concrete further includes tungsten carbide 5-10Kg/m3。
Beneficial effects of the present invention：The steel fibre and high-elastic polyethylene fibre composition that the present invention uses are three-dimensional disorderly to support
Net compensates for the initial imperfection of concrete to a certain extent, enhances the anti-pressure ability of matrix；Steel fibre and polypropylene fibre
It is intertwined, " fiber is chain " effect is generated when bearing bend tension load, improves the bending resistance of test specimen to a greater degree
Intensity；In fracture propagation process, steel fibre and polypropylene fibre successively play the leading role that resistance is split, and the extension of fracture carries out
Overall process inhibits, it will be apparent that increases the toughness of matrix；Economically hybrid fiber concrete also has certain advantage, steel
Fiber reinforcement, toughening effect are good, but will lead to project cost height；Polypropylene fibre toughening effect is good, and price is lower, but only poly- third
Alkene fiber is difficult to improve the intensity of concrete, can only delay its later period destructive process.Utilize mixing for different geometrical size fiber
Effect, making it, resistance is split and is strengthened step by step on different structure and different performance level in concrete, gives full play to the ruler of each fiber
Very little effect, is complementary to one another, and reaches and learns from other's strong points to offset one's weaknesses.
Specific embodiment
Specific embodiments of the present invention will be described in detail combined with specific embodiments below, it is to be understood that of the invention
Protection scope be not limited by the specific implementation.
The stirring process of this test concrete is as follows：Stone+sand+part mixing water stirs 30 seconds, adds water mud and outer
Admixture (slag and silicon powder) stir 30 seconds, then plus composite fibre stir one minute, then plus remaining mixing water stir one minute,
Aqua is added and subtracted to stir one minute.
Cement used by following embodiments is that ordinary portland cement particle diameter is 15 μm, chemical component, mineral
Composition and related technical performance index are as shown in table 1：
Table 1
| Chemical component | SiO2 | Al2O3 | CaO | MgO | Fe2O3 | Na2O | K2O | Loss on ignition |
| Content (%) | 21.7 | 6.35 | 65.2 | 1.93 | 4.20 | 0.21 | 1.1 | 1.43 |
Fine aggregate is high-quality river sand, and fineness modulus is 2.9, belongs to middle sand；Coarse aggregate is rubble, 5~25 ㎜ of partial size；
Used silicon powder its chemical component, mineral composition and related technical performance index are as shown in table 2：
Table 2
| Inspection project | 900 (%) | 920 (%) | 940 (%) | 970 (%) |
| SiO2 | 88.93 | 92.12 | 94.32 | 96.82 |
| K2O | 1.42 | 1.18 | 0.67 | 0.29 |
| Na2O | 0.53 | 0.46 | 0.37 | 0.29 |
| PH value | 7.70 | 7.50 | 6.60 | 7.10 |
| LOI (igloss) | 1.70 | 1.50 | 0.90 | 0.80 |
| Moisture content | 0.41 | 0.40 | 0.42 | 0.41 |
| More than 45 tm screens | 5.5 | 4.9 | 3.2 | 2.8 |
| Specific surface area (m2/g) | 18 | 19 | 19 | 19 |
Embodiment 1
A kind of skyscraper high-strength concrete, including the following raw material, cement 380Kg/m3, slag micropowder 75Kg/m3, silicon
Powder 35Kg/m3, river sand 680Kg/m3, stone 1050Kg/m3, water 180Kg/m3, water-reducing agent NNO 7Kg/m3, composite fibre 2Kg/
m3；Steel fibre accounts for 30%, high-elastic polyethylene fibre 70% in composite fibre, length of steel fiber 5mm, and high-elastic polyethylene fibre is long
Degree is 5mm.
Embodiment 2
A kind of skyscraper high-strength concrete, including the following raw material, cement 380Kg/m3, slag micropowder 75Kg/m3, silicon
Powder 35Kg/m3, river sand 680Kg/m3, stone 1050Kg/m3, water 180Kg/m3, water-reducing agent NNO 7Kg/m3, composite fibre 2Kg/
m3；Steel fibre accounts for 30%, high-elastic polyethylene fibre 70% in composite fibre, length of steel fiber 5mm, and high-elastic polyethylene fibre is long
Degree is 10mm.
Embodiment 3
A kind of skyscraper high-strength concrete, including the following raw material, cement 380Kg/m3, slag micropowder 75Kg/m3, silicon
Powder 35Kg/m3, river sand 680Kg/m3, stone 1050Kg/m3, water 180Kg/m3, water-reducing agent NNO 7Kg/m3, composite fibre 2Kg/
m3；Steel fibre accounts for 30%, high-elastic polyethylene fibre 70%, length of steel fiber 10mm, high-elastic polyethylene fibre in composite fibre
Length is 10mm.
Embodiment 4
A kind of skyscraper high-strength concrete, including the following raw material, cement 380Kg/m3, slag micropowder 75Kg/m3, silicon
Powder 35Kg/m3, river sand 680Kg/m3, stone 1050Kg/m3, water 180Kg/m3, water-reducing agent NNO 7Kg/m3, composite fibre 2Kg/
m3；Steel fibre accounts for 30%, high-elastic polyethylene fibre 70%, length of steel fiber 10mm, high-elastic polyethylene fibre in composite fibre
Length is 5mm.
Embodiment 5
A kind of skyscraper high-strength concrete, including the following raw material, cement 380Kg/m3, slag micropowder 75Kg/m3, silicon
Powder 35Kg/m3, river sand 680Kg/m3, stone 1050Kg/m3, water 180Kg/m3, water-reducing agent NNO 7Kg/m3, tungsten carbide 8Kg/m3,
Composite fibre 2Kg/m3；Steel fibre accounts for 30%, high-elastic polyethylene fibre 70% in composite fibre, length of steel fiber 5mm, high-elastic
Polyethylene fibre length is 5mm.
Comparative example 1
A kind of skyscraper high-strength concrete, including the following raw material, cement 380Kg/m3, slag micropowder 75Kg/m3, silicon
Powder 35Kg/m3, river sand 680Kg/m3, stone 1050Kg/m3, water 180Kg/m3, water-reducing agent NNO 7Kg/m3, steel fibre 2Kg/m3,
Length of steel fiber is 5mm.
Comparative example 2
A kind of skyscraper high-strength concrete, including the following raw material, cement 380Kg/m3, slag micropowder 75Kg/m3, silicon
Powder 35Kg/m3, river sand 680Kg/m3, stone 1050Kg/m3, water 180Kg/m3, water-reducing agent NNO 7Kg/m3, high-elastic polyethylene fibre
2Kg/m3；High-elastic polyethylene fibre length is 5mm.
Comparative example 3
A kind of skyscraper high-strength concrete, including the following raw material, cement 380Kg/m3, slag micropowder 75Kg/m3, silicon
Powder 35Kg/m3, river sand 680Kg/m3, stone 1050Kg/m3, water 180Kg/m3, water-reducing agent NNO 7Kg/m3。
Experimental example 1：
According to《Steel fiber reinforced concrete test method》Regulation carry out compression strength, test procedure is as follows：According to embodiment
The formula of 1-4 and comparative example 1-3 prepare cement specimen, after test specimen takes out from maintenance place, by surface of test piece and press machine pressure-bearing
Plate face is wiped clean；Then test specimen is placed on the lower platen of testing machine, test specimen pressure-bearing surface is vertical with specimen molding face；In test specimen
The heart is aligned with testing machine lower platen center, starts testing machine, when top board and test specimen are close, adjusts ball seat, keeps contact balanced；
In test pressure process, adjusts testing machine throttle and keep continuous load, loading speed is controlled in 0.5~0.8MPa per second；When
When test specimen starts sharply to deform close to destruction, stop Adjustment Tests machine oil door, until destroying.Then failing load is recorded.
Test result calculates：
Compressive strength of concrete should calculate as the following formula：
fcc=F/A
In formula：fccFor compressive strength of concrete (MPa)；F is test specimen failing load (N)；A is test specimen bearing area
(mm2)。
Test result is shown in Table 1：
Table 1
Note：* the P compared with example 1 group is represented<0.05；* represents P<0.01.
As can be seen from Table 1, the compression strength of embodiment 2 and embodiment 4 is substantially less than embodiment 1, the resistance to compression of embodiment 3
Intensity is extremely significant to be lower than embodiment 1, and the compression strength of comparative example 1-3 is extremely significant to be lower than embodiment 1, the compression strength of embodiment 5
It is significantly higher than embodiment 1.
Embodiment 6
A kind of skyscraper high-strength concrete, including the following raw material, cement 380Kg/m3, slag micropowder 75Kg/m3, silicon
Powder 35Kg/m3, river sand 680Kg/m3, stone 1050Kg/m3, water 180Kg/m3, water-reducing agent NNO 7Kg/m3, neodymium carbonate 2Kg/m3,
Composite fibre 2Kg/m3；Steel fibre accounts for 30%, high-elastic polyethylene fibre 70% in composite fibre, length of steel fiber 5mm, high-elastic
Polyethylene fibre length is 5mm.
Embodiment 7
A kind of skyscraper high-strength concrete, including the following raw material, cement 380Kg/m3, slag micropowder 75Kg/m3, silicon
Powder 35Kg/m3, river sand 680Kg/m3, stone 1050Kg/m3, water 180Kg/m3, water-reducing agent NNO 7Kg/m3, formaldehyde and n-butyl alcohol
With the polymer 2Kg/m of 6- phenyl -1,3,5- triazine -2,4- diamines3, composite fibre 2Kg/m3；Steel fibre accounts in composite fibre
30%, high-elastic polyethylene fibre 70%, length of steel fiber 5mm, high-elastic polyethylene fibre length are 5mm.
Embodiment 8
A kind of skyscraper high-strength concrete, including the following raw material, cement 380Kg/m3, slag micropowder 75Kg/m3, silicon
Powder 35Kg/m3, river sand 680Kg/m3, stone 1050Kg/m3, water 180Kg/m3, water-reducing agent NNO 7Kg/m3, formaldehyde and 1,3- benzene two
The polymer 2Kg/m of methylamine and phenol3, composite fibre 2Kg/m3；Steel fibre accounts for 30%, high-elastic polyethylene fibre in composite fibre
70%, length of steel fiber 5mm, high-elastic polyethylene fibre length are 5mm.
Experimental example 2：
To embodiment 1, the high-strength concrete of embodiment 6-8 preparation carries out tensile splitting strength test, and testing procedure is as follows：
After test specimen takes out from maintenance place, surface moisture is cleaned, the top and bottom in specimen molding draw splitting surface position；It places
Test specimen, arc filler strip and wooden backing plate, the axes alignment testing machine lower platen center of test specimen, filler strip is vertically and specimen molding
When top surface, start testing machine, when top board and filler strip are close, adjust spherical hinged-support, keep contact balanced；Test specimen is connected
Continuous, continuous load, loading speed control stop in 0.05~0.08MPa per second when test specimen closes on destruction, deformation increases rapidly
Then only Adjustment Tests machine oil door records failing load until test specimen destroys.
Test result calculates：
The tensile splitting strength of concrete cube test specimen is calculated as follows：
fts=2F/ π A
In formula：ftsFor concrete splitting tensile strength (MPa)；F is test specimen failing load (N)；A is test specimen splitting surface area
(2mm)。
Test result is shown in Table 2：
Table 2
Note：* the P compared with example 1 group is represented<0.05.
As can be seen from Table 2, the tensile splitting strength of embodiment 6 and embodiment 7 is significantly higher than embodiment 1, embodiment 8
Tensile splitting strength and embodiment 1 quite, are not significantly different.
Claims (7)
1. a kind of skyscraper high-strength concrete, which is characterized in that its component match ratio is cement 360-390Kg/m3, slag
Micro mist 70-80Kg/m3, silicon powder 30-45Kg/m3, fine aggregate 620-690Kg/m3, coarse aggregate 1000-1150Kg/m3, water 160-
190Kg/m3, water-reducing agent 5-8Kg/m3, composite fibre 1-3Kg/m3。
2. a kind of skyscraper high-strength concrete according to claim 1, which is characterized in that the cement is ferrous aluminate
Cement or portland cement, the particle diameter before aquation is between 10~25 μm.
3. a kind of skyscraper high-strength concrete according to claim 1, which is characterized in that the fine aggregate is selected clean
, the medium coarse sand that fineness modulus is 2.6~3.2.
4. a kind of skyscraper high-strength concrete according to claim 1, which is characterized in that the coarse aggregate is rubble,
Particle diameter is between 5~25 ㎜.
5. a kind of skyscraper high-strength concrete according to claim 1, which is characterized in that the water-reducing agent is naphthalene sulfonic acids
Salt based water reducer NNO or MF.
6. a kind of skyscraper high-strength concrete according to claim 1, which is characterized in that the composite fibre includes steel
One or both of fiber, high-elastic polyethylene fibre.
7. a kind of skyscraper high-strength concrete according to claim 1, which is characterized in that the high-strength concrete also wraps
Include tungsten carbide 5-10Kg/m3。
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| CN201810914976.8A CN108821699B (en) | 2018-08-13 | 2018-08-13 | High-strength concrete for high-rise building |
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| CN201810914976.8A CN108821699B (en) | 2018-08-13 | 2018-08-13 | High-strength concrete for high-rise building |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109626917A (en) * | 2019-02-20 | 2019-04-16 | 西安天盛混凝土有限公司 | A kind of C70 concrete and preparation method thereof |
| CN109734392A (en) * | 2019-03-21 | 2019-05-10 | 中山市众力高荷载建材有限公司 | A kind of C120 concrete and preparation method thereof |
| CN113800949A (en) * | 2021-09-02 | 2021-12-17 | 台州普立德建筑科技有限公司 | Hybrid fiber light wallboard and processing method thereof |
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| CN113800949A (en) * | 2021-09-02 | 2021-12-17 | 台州普立德建筑科技有限公司 | Hybrid fiber light wallboard and processing method thereof |
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| CN108821699B (en) | 2021-10-19 |
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