CN108516774A - A kind of high-strength tenacity concrete and preparation method thereof - Google Patents
A kind of high-strength tenacity concrete and preparation method thereof Download PDFInfo
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- CN108516774A CN108516774A CN201810681660.9A CN201810681660A CN108516774A CN 108516774 A CN108516774 A CN 108516774A CN 201810681660 A CN201810681660 A CN 201810681660A CN 108516774 A CN108516774 A CN 108516774A
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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
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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
- 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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- 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
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
Abstract
The present invention provides a kind of high-strength tenacity concrete, wherein portland cement, fine aggregate and coarse aggregate are conducive to improve the intensity of high-strength tenacity concrete；The intensity of steel fibre reaches 2000MPa or more, is in ductile fracture when can make concrete fracture, is conducive to the toughness for improving high-strength tenacity concrete；Plasticiser water-reducing rate is high, slump retaining is good, has and promotees solidifying, early strong and decrement effect；Swelling agent can compensate for the early-age shrinkage of high-strength tenacity concrete.The proportioning for coordinating each raw material simultaneously makes high-strength tenacity concrete provided by the invention have excellent bending tensile strength and toughness；Setting time is short, reduces influence of the driving vibrations to concrete quality；Early strength is high, and fatigue resistance is good；It shrinks small, substantially reduces the contraction in concrete each stage.It is repaired using high-strength tenacity concrete road pavement provided by the invention, has the characteristics that pumpable construction, construction operability is good, adapts to construct at 5~35 DEG C；And it is at low cost.
Description
Technical field
The present invention relates to building material technical fields, and in particular to a kind of high-strength tenacity concrete and preparation method thereof.
Background technology
Concrete is a kind of with a long history and vital material, with strength grade range is wide, durability is good, former material
The advantages that material is abundant, simple production process, is widely used in the engineerings such as building, railway, highway, water conservancy, harbour, harbour.With
The exploitation and use of various additives product, concrete performance are greatly improved, and different additives can improve mixed
The performance of solidifying soil different aspect.
But that there is also quality fluctuations is larger for normal concrete, it is big to shrink, toughness is insufficient, is easy the shortcomings of cracking, affects
Its further development in the more demanding engineering of construction quality (such as overpass pave-load layer reparation).
Invention content
The purpose of the present invention is to provide a kind of high-strength tenacity concrete and preparation method thereof, height provided by the invention is tough
Property concrete is with excellent with excellent bending tensile strength and toughness.
In order to achieve the above-mentioned object of the invention, the present invention provides following technical scheme：
The present invention provides a kind of high-strength tenacity concrete, by cementitious material, fine aggregate, coarse aggregate, steel fibre, plasticiser
It is prepared with water；
The dosage of the cementitious material is 480~560kg/m3；
The dosage of the fine aggregate is 740~800kg/m3；
The dosage of the coarse aggregate is 980~1120kg/m3；
The dosage of the steel fibre is 30~80kg/m3；
The dosage of the plasticiser is the 0.7~1.0% of cementitious material quality；
Water-cement ratio is 0.28~0.33；
Wherein, the cementitious material includes portland cement, silicon ash and swelling agent, and the swelling agent accounts for cementitious material quality
3~5%.
Preferably, the silicon ash accounts for the 3~8% of cementitious material quality, and the specific surface area of the silicon ash is not less than
15000m2/kg。
Preferably, the portland cement includes I types portland cement, II types portland cement or normal silicate water
Mud.
Preferably, the fineness modulus of the fine aggregate is 2.6~3.0, and clay content is not more than 1.0%, and clod content is little
In 0.2%.
Preferably, the coarse aggregate is that 5~16mm or 5~20mm continuous grading rubbles, flat-elongated particles content are not more than
5%, clay content is not more than 0.5%, and clod content is not more than 0.2%.
Preferably, the steel fibre is hooked steel fibre.
Preferably, the draw ratio of the steel fibre is 50~80.
Preferably, the plasticiser is polycarboxylate high performance water-reducing agent.
Preferably, the swelling agent is calcium oxide-calcium sulphoaluminate class swelling agent.
The present invention provides the preparation methods of high-strength tenacity concrete described in above-mentioned technical proposal, include the following steps：
Cementitious material, fine aggregate and coarse aggregate are mixed, mixed dry material is obtained；
The mixed dry material is mixed with water and plasticiser, obtains mixing wet feed；
The mixing wet feed is mixed with steel fibre, mixture is obtained, is poured, vibrated and conserved successively, obtain height
Obdurability concrete.
The present invention provides a kind of high-strength tenacity concrete, by cementitious material, fine aggregate, coarse aggregate, steel fibre, plasticiser
It is prepared with water；The dosage of the cementitious material is 480~560kg/m3；The dosage of the fine aggregate is 740~800kg/
m3；The dosage of the coarse aggregate is 980~1120kg/m3；The dosage of the steel fibre is 30~80kg/m3；The plasticiser
Dosage is the 0.7~1.0% of cementitious material quality；Water-cement ratio is 0.28~0.33；Wherein, the cementitious material includes silicate
Cement, silicon ash and swelling agent, the swelling agent account for the 3~5% of cementitious material quality.
In high-strength tenacity concrete provided by the invention, portland cement, fine aggregate and coarse aggregate are conducive to improve high-strength
The intensity of toughness concrete；The intensity of steel fibre reaches 2000MPa or more, can make when concrete fracture to be in ductile fracture, favorably
In the toughness for improving high-strength tenacity concrete；Plasticiser water-reducing rate is high, slump retaining is good, has and promotees solidifying, early strong and decrement effect；It is swollen
The swollen dose of early-age shrinkage that can compensate for high-strength tenacity concrete.The proportioning for coordinating each raw material simultaneously, makes provided by the invention high-strength
Toughness concrete has excellent bending tensile strength and toughness；Setting time is short, reduces driving vibrations to concrete quality
It influences；Early strength is high, and fatigue resistance is good；It shrinks small, substantially reduces the contraction in concrete each stage.It is carried using the present invention
The high-strength tenacity concrete road pavement of confession is repaired, and has the characteristics that pumpable construction, and construction operability is good, and adaptation 5~
It constructs at 35 DEG C；And it is at low cost.
Embodiment the experimental results showed that, high-strength tenacity concrete provided by the invention for 24 hours compression strength be 36~
42MPa, 28d compression strength be 90~104MPa, 28d bending tensile strengths be 11~15MPa, 28d equivalent bending strengths be 6~
10MPa, limited expansion rate are -0.006~-0.008% (7d turns 28d in air in water)；The slump is 6cm.
Specific implementation mode
The present invention provides a kind of high-strength tenacity concrete, by cementitious material, fine aggregate, coarse aggregate, steel fibre, plasticiser
It is prepared with water；
The dosage of the cementitious material is 480~560kg/m3；
The dosage of the fine aggregate is 740~800kg/m3；
The dosage of the coarse aggregate is 980~1120kg/m3；
The dosage of the steel fibre is 30~80kg/m3；
The dosage of the plasticiser is the 0.7~1.0% of cementitious material quality；
Water-cement ratio is 0.28~0.33；
Wherein, the cementitious material includes portland cement, silicon ash and swelling agent, and the swelling agent accounts for cementitious material quality
3~5%.
In the present invention, the dosage of the cementitious material is 480~560kg/m3, preferably 500~540kg/m3。
In the present invention, the portland cement preferably includes I types portland cement, II types portland cement or ordinary silicon
Acid salt cement, more preferably I types portland cement or II type portland cements.
The present invention uses the portland cement of high intensity, is capable of providing the enough intensity of concrete.
In the present invention, the silicon ash preferably accounts for the 3~8% of cementitious material quality, more preferably 4~6%, most preferably
5%.In the present invention, the specific surface area of the silicon ash is preferably not less than 15000m2/kg。
In the present invention, the silicon ash can improve early strength of concrete, improve the wrapping property of concrete mix.
In the present invention, the swelling agent accounts for the 3~5% of cementitious material quality, preferably 4%.In the present invention, described
Swelling agent is preferably calcium oxide-calcium sulphoaluminate class swelling agent.
In the present invention, the swelling agent can compensate for the early-age shrinkage of high-strength tenacity concrete.
In the present invention, the dosage of the fine aggregate is 740~800kg/m3, preferably 750~780kg/m3.In this hair
In bright, the performance indicator of the fine aggregate is preferably：Fineness modulus is 2.6~3.0, and clay content is not more than 1.0%, clod content
No more than 0.2%.
In the present invention, the dosage of the coarse aggregate is 980~1120kg/m3, preferably 990~1100kg/m3.At this
In invention, the performance indicator of the coarse aggregate is preferably：5~16mm or 5~20mm continuous grading rubbles, flat-elongated particles content
No more than 5%, clay content is not more than 0.5%, and clod content is not more than 0.2%.
In the present invention, the fine aggregate and coarse aggregate is firm, clean and grading is good, is capable of providing high-strength tenacity coagulation
The enough volume stabilities of soil.
In the present invention, the dosage of the steel fibre is 30~80kg/m3, preferably 30~70kg/m3.In the present invention,
The steel fibre is preferably hooked steel fibre；The draw ratio of the steel fibre is preferably 50~80.
In the present invention, the intensity of the steel fibre reaches 2000MPa or more, can make to break in ductility when concrete fracture
It is bad.
In the present invention, in terms of the quality of cementitious material, the dosage of the plasticiser is the 0.7~1.0% of cementitious material,
Preferably 0.8%.In the present invention, the plasticiser is preferably polycarboxylate high performance water-reducing agent.
In the present invention, the plasticiser water-reducing rate is high, slump retaining is good, has and promotees solidifying, early strong and decrement effect.
In the present invention, the water-cement ratio of the high-strength tenacity concrete is 0.28~0.33, preferably 0.30~0.32.
In the present invention, when the water-cement ratio is 0.28~0.33, concrete can have not only been made to obtain sufficiently high intensity, but also can
Water needed for the abundant aquation of swelling agent is provided.
In the present invention, in order to ensure during the high-strength tenacity concrete transportation steel fibre be distributed uniformity,
Its slump is preferably controlled in 4~7cm, more preferably 5~6cm.
In the present invention, raw material used by the high-strength tenacity concrete is preferably all using drying or air-dried material, work
Factory's metering packing eliminates high-strength tenacity concrete quality wave caused by feed moisture content fluctuation, not accurate etc. enough factors of metering
It is dynamic.
The present invention provides the preparation methods of high-strength tenacity concrete described in above-mentioned technical proposal, include the following steps：
Cementitious material, fine aggregate and coarse aggregate are mixed, mixed dry material is obtained；
The mixed dry material is mixed with water and plasticiser, obtains mixing wet feed；
The mixing wet feed is mixed with steel fibre, mixture is obtained, is poured, vibrated and conserved successively, obtain height
Obdurability concrete.
The present invention mixes cementitious material, fine aggregate and coarse aggregate, obtains mixed dry material.The present invention does not have the mixing
There is special restriction, each material can be sufficiently mixed.In an embodiment of the present invention, specifically by cementitious material, thin
In aggregate and coarse aggregate input concrete mixer, 15s is stirred, mixed dry material is obtained.The present invention is for the cementitious material
Preparation method does not have special restriction, is prepared using method well known to those skilled in the art, such as by silicate cement
Mud, silicon ash and swelling agent mixing, obtain cementitious material.
After obtaining mixed dry material, the present invention mixes the mixed dry material with water and plasticiser, obtains mixing wet feed.This hair
Each material, can be sufficiently mixed by the bright restriction not special for the mixing.In an embodiment of the present invention, specifically
It is that water and plasticiser are added into gained mixed dry material, stirs 1min, obtains mixing wet feed.
After obtaining mixing wet feed, the present invention mixes the mixing wet feed with steel fibre, obtains mixture, is poured successively
It builds, vibrate and conserves, obtain high-strength tenacity concrete.The present invention, can be by each object for the not special restriction of the mixing
Material is sufficiently mixed.In an embodiment of the present invention, steel fibre is specifically added into the mixing wet feed, stirs 2min,
Obtain mixture.The present invention pours, vibrates and conserves not special restriction for described, using known to those skilled in the art
The technical solution for pouring, vibrating and conserving.Present invention preferably employs the sides of vibrating for making steel fibre horizontal distribution as far as possible
Formula, and timely and effective maintenance avoids the occurrence of mass defect and weak spot to promote its lowest quality level.
High-strength tenacity concrete provided by the invention can be used for the reparation of road pavement, specifically, being provided using the present invention
The connection method of high-strength tenacity concrete and old concrete pave-load layer preferably include following steps：
(1) planting rebar connects new and old layer concrete of mating formation.
(2) after old layer concrete milling Bao of mating formation, spraying acrylic acid series interface waterproofing agent, one reinforces old layer concrete of mating formation
Surface strength, secondly enhancing and newly-laid concrete adhesion strength, thirdly buffering or that eliminates between new-old concrete interface bad answer
Power, to ensure new-old concrete connection steadily in the long term and whole stress.
When high-strength tenacity concrete provided by the invention is used for the reparation of road pavement, high-strength tenacity concrete pavement thickness
Preferably not less than 8cm.
High-strength tenacity concrete provided by the invention construction usage preferably at 5~35 DEG C.
Below in conjunction with the embodiment in the present invention, the technical solution in the present invention is clearly and completely described.It is aobvious
So, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the reality in the present invention
Example is applied, every other embodiment obtained by those of ordinary skill in the art without making creative efforts all belongs to
In the scope of protection of the invention.
Embodiment 1
Prepare the raw material and proportioning of high-strength tenacity concrete：
The dosage of cementitious material is 480kg/m3, wherein the cementitious material includes I types portland cement, silicon ash and oxygen
Change calcium-calcium sulphoaluminate class swelling agent, (specific surface area is not less than 15000m to silicon ash2/ kg) the 3% of cementitious material quality is accounted for, oxidation
Calcium-calcium sulphoaluminate class swelling agent accounts for the 4% of cementitious material quality；
The dosage of fine aggregate is 750kg/m3, wherein the fineness modulus of fine aggregate is 2.8, and clay content is not more than 1.0%,
Clod content is not more than 0.2%；
The dosage of coarse aggregate is 1020kg/m3, wherein coarse aggregate is 5~20mm continuous grading rubbles, and flat-elongated particles contain
Amount is not more than 5%, and clay content is not more than 0.5%, and clod content is not more than 0.2%；
The dosage of hooked steel fibre is 40kg/m3, wherein draw ratio 65；
In terms of the quality of cementitious material, the dosage of polycarboxylate high performance water-reducing agent is the 0.8% of cementitious material；
Water-cement ratio is 0.32.
The method for preparing high-strength tenacity concrete includes the following steps：
Cementitious material, fine aggregate and coarse aggregate are put into concrete mixer and stir 15s, water and plasticiser is added, stirs
1min is mixed, then puts into steel fibre, 2min is stirred, is poured, vibrated and conserved successively, obtain high-strength tenacity concrete.
The high-strength tenacity concrete prepared to embodiment 1 is tested for the property, specific as follows：
Compression strength for 24 hours：36MPa(GB/T50081-2002《Standard for test methods of mechanical properties of ordinary concrete》)；
28d compression strength：90MPa(GB/T50081-2002《Standard for test methods of mechanical properties of ordinary concrete》)；
28d bending tensile strengths：11MPa (uses four-point bending test method)；
28d equivalent bending strengths：6MPa (toughness of equivalent bending strength index characterization high-strength tenacity concrete is used,
CECS13:2009《Fiber concrete test method standard》)；
Limited expansion rate：- 0.008% (7d turns 28d in air, GB/T50119-2013 in water《Concrete admixture application
Technical specification》)；
The slump is 6cm (GB/T50080-2016《Standard for test methods of properties of ordinary concrete mixture standard》).
Embodiment 2
Prepare the raw material and proportioning of high-strength tenacity concrete：
The dosage of cementitious material is 560kg/m3, wherein the cementitious material includes I types portland cement, silicon ash and oxygen
Change calcium-calcium sulphoaluminate class swelling agent, (specific surface area is not less than 15000m to silicon ash2/ kg) the 5% of cementitious material quality is accounted for, oxidation
Calcium-calcium sulphoaluminate class swelling agent accounts for the 4% of cementitious material quality；
The dosage of fine aggregate is 800kg/m3, wherein the fineness modulus of fine aggregate is 2.8, and clay content is not more than 1.0%,
Clod content is not more than 0.2%；
The dosage of coarse aggregate is 1000kg/m3, wherein coarse aggregate is 5~16mm continuous grading rubbles, and flat-elongated particles contain
Amount is not more than 5%, and clay content is not more than 0.5%, and clod content is not more than 0.2%；
The dosage of hooked steel fibre is 70kg/m3, wherein draw ratio 65；
In terms of the quality of cementitious material, the dosage of polycarboxylate high performance water-reducing agent is the 1.0% of cementitious material；
Water-cement ratio is 0.28.
The method for preparing high-strength tenacity concrete includes the following steps：
Cementitious material, fine aggregate and coarse aggregate are put into concrete mixer and stir 15s, water and plasticiser is added, stirs
1min is mixed, then puts into steel fibre, 2min is stirred, is poured, vibrated and conserved successively, obtain high-strength tenacity concrete.
The high-strength tenacity concrete prepared to embodiment 2 is tested for the property, specific as follows：
Compression strength for 24 hours：42MPa(GB/T50081-2002《Standard for test methods of mechanical properties of ordinary concrete》)；
28d compression strength：104MPa(GB/T50081-2002《Standard for test methods of mechanical properties of ordinary concrete》)；
28d bending tensile strengths：15MPa (uses four-point bending test method)；
28d equivalent bending strengths：10MPa (toughness of equivalent bending strength index characterization high-strength tenacity concrete is used,
CECS13:2009《Fiber concrete test method standard》)；
Limited expansion rate：- 0.006% (7d turns 28d in air, GB/T50119-2013 in water《Concrete admixture application
Technical specification》)；
The slump is 6cm (GB/T50080-2016《Standard for test methods of properties of ordinary concrete mixture standard》).
Embodiment 3
Prepare the raw material and proportioning of high-strength tenacity concrete：
The dosage of cementitious material is 540kg/m3, wherein the cementitious material includes I types portland cement, silicon ash and oxygen
Change calcium-calcium sulphoaluminate class swelling agent, (specific surface area is not less than 15000m to silicon ash2/ kg) the 4% of cementitious material quality is accounted for, oxidation
Calcium-calcium sulphoaluminate class swelling agent accounts for the 4% of cementitious material quality；
The dosage of fine aggregate is 800kg/m3, wherein the fineness modulus of fine aggregate is 2.8, and clay content is not more than 1.0%,
Clod content is not more than 0.2%；
The dosage of coarse aggregate is 1000kg/m3, wherein coarse aggregate is 5~16mm continuous grading rubbles, and flat-elongated particles contain
Amount is not more than 5%, and clay content is not more than 0.5%, and clod content is not more than 0.2%；
The dosage of hooked steel fibre is 80kg/m3, wherein draw ratio 65；
In terms of the quality of cementitious material, the dosage of polycarboxylate high performance water-reducing agent is the 1.0% of cementitious material；
Water-cement ratio is 0.29.
The method for preparing high-strength tenacity concrete includes the following steps：
Cementitious material, fine aggregate and coarse aggregate are put into concrete mixer and stir 15s, water and plasticiser is added, stirs
1min is mixed, then puts into steel fibre, 2min is stirred, is poured, vibrated and conserved successively, obtain high-strength tenacity concrete.
The high-strength tenacity concrete prepared to embodiment 3 is tested for the property, specific as follows：
Compression strength for 24 hours：37MPa(GB/T50081-2002《Standard for test methods of mechanical properties of ordinary concrete》)；
28d compression strength：102MPa(GB/T50081-2002《Standard for test methods of mechanical properties of ordinary concrete》)；
28d bending tensile strengths：13MPa (uses four-point bending test method)；
28d equivalent bending strengths：7MPa (toughness of equivalent bending strength index characterization high-strength tenacity concrete is used,
CECS13:2009《Fiber concrete test method standard》)；
Limited expansion rate：- 0.008% (7d turns 28d in air, GB/T50119-2013 in water《Concrete admixture application
Technical specification》)；
The slump is 6cm (GB/T50080-2016《Standard for test methods of properties of ordinary concrete mixture standard》).
As seen from the above embodiment, high-strength tenacity concrete provided by the invention has excellent bending tensile strength and tough
Property；Setting time is short, reduces influence of the driving vibrations to concrete quality；Early strength is high, and fatigue resistance is good；Shrink it is small,
Substantially reduce the contraction in concrete each stage.It is repaired using high-strength tenacity concrete road pavement provided by the invention,
Has the characteristics that pumpable construction, construction operability is good, adapts to construct at 5~35 DEG C；And it is at low cost.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of high-strength tenacity concrete, is prepared by cementitious material, fine aggregate, coarse aggregate, steel fibre, plasticiser and water；
The dosage of the cementitious material is 480~560kg/m3；
The dosage of the fine aggregate is 740~800kg/m3；
The dosage of the coarse aggregate is 980~1120kg/m3；
The dosage of the steel fibre is 30~80kg/m3；
The dosage of the plasticiser is the 0.7~1.0% of cementitious material quality；
Water-cement ratio is 0.28~0.33；
Wherein, the cementitious material includes portland cement, silicon ash and swelling agent, and the swelling agent accounts for the 3 of cementitious material quality
~5%.
2. high-strength tenacity concrete according to claim 1, which is characterized in that the silicon ash accounts for the 3 of cementitious material quality
~8%, the specific surface area of the silicon ash is not less than 15000m2/kg。
3. high-strength tenacity concrete according to claim 2, which is characterized in that the portland cement includes I type silicic acid
Salt cement, II types portland cement or Portland cement.
4. high-strength tenacity concrete according to claim 1, which is characterized in that the fineness modulus of the fine aggregate is 2.6
~3.0, clay content is not more than 1.0%, and clod content is not more than 0.2%.
5. high-strength tenacity concrete according to claim 1, which is characterized in that the coarse aggregate be 5~16mm or 5~
20mm continuous grading rubbles, flat-elongated particles content are not more than 5%, and clay content is not more than 0.5%, and clod content is not more than
0.2%.
6. high-strength tenacity concrete according to claim 1, which is characterized in that the steel fibre is hooked steel fibre.
7. high-strength tenacity concrete according to claim 1 or 6, which is characterized in that the draw ratio of the steel fibre is 50
~80.
8. high-strength tenacity concrete according to claim 1, which is characterized in that the plasticiser is polycarboxylic acid series high-performance
Water-reducing agent.
9. high-strength tenacity concrete according to claim 1, which is characterized in that the swelling agent is calcium oxide-sulphur aluminic acid
Calcium class swelling agent.
10. the preparation method of any one of the claim 1~9 high-strength tenacity concrete, includes the following steps：
Cementitious material, fine aggregate and coarse aggregate are mixed, mixed dry material is obtained；
The mixed dry material is mixed with water and plasticiser, obtains mixing wet feed；
The mixing wet feed is mixed with steel fibre, mixture is obtained, is poured, vibrated and conserved successively, is obtained high tough
Property concrete.
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| CN109608120A (en) * | 2018-11-26 | 2019-04-12 | 安徽特耐尔节能科技有限公司 | A kind of strong concrete material that can quickly solidify |
| CN112500087A (en) * | 2020-12-24 | 2021-03-16 | 江南大学 | High-strength high-toughness permeable cement concrete and preparation method thereof |
| CN115849821A (en) * | 2022-12-09 | 2023-03-28 | 上海申继交通科技有限公司 | High-strength and high-toughness concrete and application thereof |
| CN116283145A (en) * | 2023-03-14 | 2023-06-23 | 西南交通大学 | High-strength and high-toughness heat-insulation functional sprayed concrete for high-temperature hot water tunnel |
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| CN112500087B (en) * | 2020-12-24 | 2021-10-22 | 江南大学 | High-strength high-toughness permeable cement concrete and preparation method thereof |
| CN115849821A (en) * | 2022-12-09 | 2023-03-28 | 上海申继交通科技有限公司 | High-strength and high-toughness concrete and application thereof |
| CN116283145A (en) * | 2023-03-14 | 2023-06-23 | 西南交通大学 | High-strength and high-toughness heat-insulation functional sprayed concrete for high-temperature hot water tunnel |
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