CN106431147A - Micro-hoop restraint-reinforced concrete - Google Patents
Micro-hoop restraint-reinforced concrete Download PDFInfo
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- CN106431147A CN106431147A CN201610895878.5A CN201610895878A CN106431147A CN 106431147 A CN106431147 A CN 106431147A CN 201610895878 A CN201610895878 A CN 201610895878A CN 106431147 A CN106431147 A CN 106431147A
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- hoop
- loop hoop
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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
- C04B20/0008—Materials specified by a shape not covered by C04B20/0016 - C04B20/0056, e.g. nanotubes
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Nanotechnology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses micro-hoop restraint-reinforced concrete. Micro hoops of ring-shaped closed structures are added into common concrete, and elastic modulus of micro hoops is higher than that of hardened cement paste of the common cement. The micro hoops are distributed in the common cement evenly, and the adding amount of the micro hoops accounts for 1-3% of the concrete volume. The micro hoops are made of high-strength steel wires, steel cords, glass fibers or carbon fibers, and a space structure of each micro hoop is round, oval, irregularly oval, triangular or an optional combination of the above shapes. The micro-hoop restraint-reinforced concrete has the advantages that the micro-hoop restraint-reinforced concrete is simple in preparation technology, low in requirements on raw materials and easily controllable in preparation process, concrete forming quality is better than stability of high-strength concrete, and the concrete compressive strength is substantially increased while tensile strength and concrete ductility are improved through a simple and convenient technological method.
Description
Technical field
The present invention relates to building material technical field is and in particular to a kind of high-strength concrete.
Background technology
In engineering material, concrete is a kind of most widely used construction material, and this material pluses and minuses is more obvious, in order to
Meet the demand to high-strength concrete for the modern architecture, domestic and international experts and scholars are carried out with construction to the production preparation of high-strength concrete
Substantial amounts of research.
The know-why preparing high-strength concrete is more ripe, in the concrete enhancement method that the realm of building construction is common
Mainly have following two, one kind is by preferred raw material, optimised coagulation soil match ratio, reduces water-cement ratio to greatest extent.So
And, the method is high to material requirements such as aggregate, Binder Materials and additives, also needs to the strict control measures of science simultaneously and protects
Barrier.Therefore, the method enforcement difficulty in actual production is big, and concrete quality fluctuation is big, and the concrete one of low water binder ratio
As viscosity bigger than normal, to super high pump-conveying require higher.
Another kind is to provide effect of contraction using some way to concrete, limits the development of its internal microcrack, thus
Improve concrete strength.Internal constraint and external constraint, modal internal constraint mode are divided into according to the difference of the way of restraint
For fibre reinforced concrete, fibrous material mainly has：Steel fibre, glass fibre, polypropylene fibre etc., fibre reinforced concrete energy
Significantly increase toughness of concrete, the raising to tensile strength has obvious help.However, due to being in needle-like or lamellar fiber, more
Itself adhesiveness and matrix between is not enough, and restraining forceies are weaker, so that during concrete destruction, being all that fiber is drawn out, to resistance to compression
The raising of intensity is inconspicuous.Meanwhile, the incorporation of fiber is larger on the service behaviour impact of concrete, and part exposed fibers
Adverse effect may be brought to operator and user.External constraint mode concrete mainly has FRP constraint concrete, stirrup
Confined concrete, concrete filled steel tube, steel wire confined concrete etc., the external constraint of concrete belongs to passive bound mode, that is,
Binding effect competence exertion effect only when concrete transverse strain reaches to a certain degree.External constraint concrete mainly strengthens
Concrete component, needs to wrap up concrete using correlation technique, difficulty of construction is larger, and because concrete is wrapped, belongs to
Concealed work, its difficult quality controls.
Both the above method all can improve concrete strength to a certain extent, improves the performance of concrete.However, passing through
Preferred raw material and the high-strength concrete quality control requirement height reducing water-cement ratio preparation, and field conduct difficulty is big；Fiber mixes
The restraining forceies of solidifying soil are weaker, external constraint concrete difficulty of construction limits the application of Concrete Structure the shortcomings of big, therefore,
Research and develop that a kind of restraining forceies are strong, preparation method is simple, process is easy to control, intensity especially comprcssive strength lifts the big enhancing of amplitude and mixes
Solidifying soil is modern construction engineering urgent needss.
Content of the invention
It is an object of the invention to provide a kind of Concrete Structure is it is adaptable to various production and project under construction, this concrete system
Preparation Method is simple, and service behaviour and normal concrete are as good as it is easy to pump.
For reaching above-mentioned purpose, as follows using technical scheme：
Micro-loop hoop constrains Concrete Structure, adds micro-loop hoop in normal concrete, and the elastic modelling quantity of described micro-loop hoop is high
In described ordinary cement hydrated cement paste；Described micro-loop hoop is closed circular structure.
By such scheme, described micro-loop hoop is evenly distributed in normal concrete.
By such scheme, the maximum gauge of described micro-loop hoop is less than 20mm, the maximum gauge of described micro-loop hoop cross section
Less than 1mm.
By such scheme, described micro-loop hoop elastic modelling quantity is higher than the two of described ordinary cement hydrated cement paste elastic modelling quantity
Times.
By such scheme, the addition of described micro-loop hoop accounts for the 1%～3% of described Concrete Structure volume.
By such scheme, the material that described micro-loop hoop adopts is rustless steel, steel wire, steel cord, glass fibre or carbon fiber.
By such scheme, the space structure of described micro-loop hoop be circular, oval, irregular oval, triangle or its
Arbitrarily mix.
Micro-loop hoop of the present invention constrains Concrete Structure, and the component comprising has micro-loop hoop and normal concrete.In common coagulation
Micro-loop hoop is filled, micro-loop hoop is uniformly distributed in concrete at random, micro-loop hoop and aggregate or hydrated cement paste in native whipping process
Form the stress unit that numerous mutual sockets are in restrained condition, limit the development of inside concrete microcrack, be greatly improved mixed
The comprcssive strength of solidifying soil, simultaneously moreover it is possible to improve tensile strength and the ductility of concrete.
Micro-loop hoop is made up of Materials with High Strength, such as high tensile steel wire, steel cord, glass fibre or carbon fiber etc., micro-loop hoop material
Elastic modelling quantity should be higher than that hydrated cement paste, when crack extension in cement mortar, hoop deform less than cement mortar, thus hoop
The deformation of cement mortar can be constrained, limit microcrack extension.In order to improve the effect of contraction to inside concrete for the micro-loop hoop, micro-loop
Hoop should be annulus or the geometrical body of closing, such as annulus, the spherical body being made up of multiple annulus etc..
In micro-loop hoop constraint Concrete Structure, micro-loop hoop can be socketed on aggregate it is also possible to be socketed in cement mortar, therefore micro-
The planar dimension of hoop with coarse aggregate adjoining dimensions, and in order to improve the synergism between micro-loop hoop, should mix in concrete
Micro-loop hoop can be combined forming by multiple different sizes.
The incorporation of micro-loop hoop has no significant effect to working performance of concrete, but can make concrete comprcssive strength improve 20～
60%, also can improve the rupture strength of concrete simultaneously.
With respect to prior art, the invention has the beneficial effects as follows：
1st, micro-loop hoop constrains the preparation process is simple of Concrete Structure, raw material is required low.
2nd, concrete preparation process controls and is easier to, concrete formation quality more existing high-strength concrete good stability.
3rd, micro-loop hoop constraint Concrete Structure realizes increasing substantially of concrete crushing strength with easier process,
Meanwhile, the also larger tensile strength and the ductility that increased this concrete.
Specific embodiment
Following examples explain technical scheme further, but not as limiting the scope of the invention.
The match ratio of normal concrete is Binder Materials：Stone：Sand：Water：Additive=1：1.5：1.29：0.26：
0.026.Cement adopts 42.5 Portland cements.At the uniform velocity add micro-loop hoop by slow in normal concrete whipping process, prolong
The mixing time of long micro-loop hoop concrete is it is ensured that micro-loop hoop is evenly distributed in concrete.
Embodiment 1
Micro-loop hoop：Qin steel wire SWP-B, hoop dimension is 15 × 0.6, and that is, line footpath is 0.6mm, and hoop external diameter is 15mm.
Fill the micro-loop hoop that percent by volume is 1.5% and 3% respectively in normal concrete, to normal concrete and
Micro-loop hoop constraint Concrete Structure carries out comprcssive strength (test block is 150 × 150 × 150mm), rupture strength test (test block respectively
For 150 × 150 × 550mm), as shown in table 1, usability test result is as shown in table 2 for strength test results：
Table 1 micro-loop hoop constrains Concrete Structure strength test list position：MPa
| Micro-loop hoop mass content | Comprcssive strength | Rupture strength | Comprcssive strength amplification | Rupture strength amplification |
| 0 | 62.0 | 6.3 | -- | -- |
| 1.5% | 81.9 | 10.1 | 32.1% | 60.3% |
| 3% | 91.2 | 11.4 | 47.1% | 81.0% |
Table 2 micro-loop hoop constrains Concrete Structure usability test list position：mm
| Micro-loop hoop mass content | The slump | Divergence |
| 0 | 250 | 680 |
| 1.5% | 230 | 650 |
| 3% | 220 | 640 |
As it can be seen from table 1 compared to normal concrete, volume is the anti-of 1.5% micro-loop hoop constraint Concrete Structure
Compressive Strength and rupture strength increased 32.1% and 60.3% respectively, and volume is the anti-of 3% micro-loop hoop constraint Concrete Structure
Compressive Strength and rupture strength increased 47.1% and 81.0% respectively, show that the incorporation of micro-loop hoop can make the resistance to compression of normal concrete
Intensity improves 20～60%, and tensile strength improves 30%～80%.
From table 2 it can be seen that compared to normal concrete, under suitable volume (≤2%), the incorporation of micro-loop hoop is to coagulation
The service behaviour impact of soil is less, but the micro-loop hoop of 3% volume volume is big on working performance of concrete impact.
Embodiment 2
Micro-loop hoop：Reinforced plastic glass fibre ring, hoop dimension is 15 × 0.6, and that is, line footpath is 0.6mm, and hoop external diameter is 15mm.
Fill the micro-loop hoop that percent by volume is 1% and 2% respectively in normal concrete, to normal concrete and micro-
Hoop constraint Concrete Structure carries out comprcssive strength (test block be 150 × 150 × 150mm) respectively, (test block is for rupture strength test
150 × 150 × 550mm), as shown in table 3, usability test result is as shown in table 4 for strength test results：
Table 3 micro-loop hoop constrains Concrete Structure strength test list position：MPa
| Micro-loop hoop percent by volume | Comprcssive strength | Rupture strength | Comprcssive strength amplification | Rupture strength amplification |
| 0 | 61.5 | 6.2 | -- | -- |
| 1% | 81.1 | 9.2 | 31.9% | 48.4% |
| 2% | 95.2 | 10.6 | 54.8% | 70.1% |
Table 4 micro-loop hoop constrains Concrete Structure usability test list position：mm
| Micro-loop hoop percent by volume | The slump | Divergence |
| 0 | 250 | 680 |
| 1% | 235 | 660 |
| 2% | 220 | 640 |
From table 3 it can be seen that compared to normal concrete, volume is the resistance to compression of 1% micro-loop hoop constraint Concrete Structure
Intensity and rupture strength increased 31.9% and 48.4% respectively, and volume is the resistance to compression of 2% micro-loop hoop constraint Concrete Structure
Intensity and rupture strength increased 54.8% and 70.1% respectively, show that the incorporation of micro-loop hoop can make the pressure resistance of normal concrete
Degree raising 20～60%, rupture strength improves 30%～80%.
From table 4, it can be seen that compared to normal concrete, under reasonable volume (≤2%), it is right to mix for reinforced plastic glass fibre ring
The service behaviour impact of concrete is less.
Claims (7)
1. micro-loop hoop constraint Concrete Structure is it is characterised in that add micro-loop hoop in normal concrete；The bullet of described micro-loop hoop
Property modulus be higher than described ordinary cement hydrated cement paste elastic modelling quantity；Described micro-loop hoop is closed circular structure.
2. micro-loop hoop as claimed in claim 1 constraint Concrete Structure it is characterised in that described micro-loop hoop be evenly distributed on general
In logical concrete.
3. micro-loop hoop as claimed in claim 1 constraint Concrete Structure it is characterised in that the maximum gauge of described micro-loop hoop not
More than 20mm, the maximum gauge of described micro-loop hoop cross section is less than 1mm.
4. micro-loop hoop constraint Concrete Structure as claimed in claim 1 is it is characterised in that described micro-loop hoop elastic modelling quantity is higher than
The twice of described ordinary cement hydrated cement paste elastic modelling quantity.
5. micro-loop hoop constraint Concrete Structure as claimed in claim 1 is it is characterised in that the addition of described micro-loop hoop accounts for institute
State the 1%～3% of Concrete Structure volume.
6. micro-loop hoop as claimed in claim 1 constrains Concrete Structure it is characterised in that the material that described micro-loop hoop adopts is
High tensile steel wire, steel cord, glass fibre or carbon fiber etc..
7. micro-loop hoop constraint Concrete Structure as claimed in claim 1 is it is characterised in that the space structure of described micro-loop hoop is
Circular, oval, irregular oval, triangle or its arbitrarily mix.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610895878.5A CN106431147A (en) | 2016-10-12 | 2016-10-12 | Micro-hoop restraint-reinforced concrete |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610895878.5A CN106431147A (en) | 2016-10-12 | 2016-10-12 | Micro-hoop restraint-reinforced concrete |
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| CN106431147A true CN106431147A (en) | 2017-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610895878.5A Pending CN106431147A (en) | 2016-10-12 | 2016-10-12 | Micro-hoop restraint-reinforced concrete |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107973566A (en) * | 2017-11-03 | 2018-05-01 | 重庆工程职业技术学院 | Enhanced concrete is split in one kind resistance |
| CN113716901A (en) * | 2021-08-17 | 2021-11-30 | 湖南工业大学 | Novel method for reinforcing and toughening concrete and concrete |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6197401B1 (en) * | 1998-04-17 | 2001-03-06 | Jeong Ho Ahn | Concrete including a plurality of fiber rings |
| CN102001839A (en) * | 2010-03-29 | 2011-04-06 | 中国铁道科学研究院铁道建筑研究所 | Silica micropowder-containing concrete composite admixture and preparation method thereof |
| CN102001845A (en) * | 2010-03-29 | 2011-04-06 | 中国铁道科学研究院铁道建筑研究所 | Concrete composite containing silicon micro powder and preparation method thereof |
| WO2015055878A1 (en) * | 2013-10-14 | 2015-04-23 | Abengoa Solar New Technologies, S.A. | High-strength self-compacting concrete and method for the production thereof |
| CN105884231A (en) * | 2016-04-20 | 2016-08-24 | 中建商品混凝土西安有限公司 | Mineral preservative for inhibiting corrosion to concrete and use method of mineral preservative |
-
2016
- 2016-10-12 CN CN201610895878.5A patent/CN106431147A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6197401B1 (en) * | 1998-04-17 | 2001-03-06 | Jeong Ho Ahn | Concrete including a plurality of fiber rings |
| CN102001839A (en) * | 2010-03-29 | 2011-04-06 | 中国铁道科学研究院铁道建筑研究所 | Silica micropowder-containing concrete composite admixture and preparation method thereof |
| CN102001845A (en) * | 2010-03-29 | 2011-04-06 | 中国铁道科学研究院铁道建筑研究所 | Concrete composite containing silicon micro powder and preparation method thereof |
| WO2015055878A1 (en) * | 2013-10-14 | 2015-04-23 | Abengoa Solar New Technologies, S.A. | High-strength self-compacting concrete and method for the production thereof |
| CN105884231A (en) * | 2016-04-20 | 2016-08-24 | 中建商品混凝土西安有限公司 | Mineral preservative for inhibiting corrosion to concrete and use method of mineral preservative |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107973566A (en) * | 2017-11-03 | 2018-05-01 | 重庆工程职业技术学院 | Enhanced concrete is split in one kind resistance |
| CN113716901A (en) * | 2021-08-17 | 2021-11-30 | 湖南工业大学 | Novel method for reinforcing and toughening concrete and concrete |
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Application publication date: 20170222 |