CN105503054A - Ultrahigh-strength concrete with ultrahigh pumping performance and preparation method of ultrahigh-strength concrete - Google Patents
Ultrahigh-strength concrete with ultrahigh pumping performance and preparation method of ultrahigh-strength concrete Download PDFInfo
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- CN105503054A CN105503054A CN201510987930.5A CN201510987930A CN105503054A CN 105503054 A CN105503054 A CN 105503054A CN 201510987930 A CN201510987930 A CN 201510987930A CN 105503054 A CN105503054 A CN 105503054A
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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
- 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 Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to ultrahigh-strength concrete with ultrahigh pumping performance. The ultrahigh-strength concrete comprises components as follows: 300-380 parts of cement, 570-590 parts of sand, 1,100-1,200 parts of gravel, 160-175 parts of water, 30-35 parts of stone powder, 135-150 parts of coal ash, 15-25 parts of zeolite powder, 70-90 parts of mineral powder, 15-20 parts of a water reducer, 22-35 parts of silicon powder and 0.03-0.04 parts of an air entraining agent. The ultrahigh-strength concrete is prepared through steps as follows: (1), raw materials are weighed in a predetermined ratio; (2), the air entraining agent is added to the water reducer and are stirred uniformly; (3), the sand and the gravel are put into a stirrer and are stirred, and then the cement, the stone powder, the coal ash, the zeolite powder, the mineral powder and the silicon powder are sequentially put into the stirrer and are stirred; a mixture obtained from the step (2) is added, and water is added. With the adoption of the appropriate raw material ratio, the ultrahigh-strength concrete with ultrahigh strength, low viscosity and good pumping performance is prepared.
Description
Technical field
The present invention relates to technical field of concrete, particularly relate to a kind of super high strength concrete with super high pump-conveying property and preparation method thereof.
Background technology
Along with the development of construction industry, the propelling of urbanization process, the quantity of high-rise building gets more and more, and these high-rise buildings need concrete used to have the strength grade of superelevation on the one hand, need concrete to have good serviceability on the other hand, can directly be pumped into higher vertical height.Therefore be necessary to develop the good concrete of this superstrength, low viscosity and pump-conveying property specially.
Summary of the invention
The object of this invention is to provide a kind of use and adopt cheap starting material, adopt suitable proportioning raw materials, obtained have superstrength, low viscosity and pump-conveying property good the super high strength concrete with super high pump-conveying property, the inventive method production technique is simple, easy construction.
For achieving the above object, the super high strength concrete that the present invention has a super high pump-conveying property comprises the component of following parts by weight: cement 300-380 part, sand 570-590 part, stone 1100-1200 part, water 160-175 part, stone flour 30 ~ 35 parts, flyash 135-150 part, zeolite powder 15-25 part, breeze 70-90 part, water reducer 15-20 part, silica flour 22-35 part, air entrapment agent 0.03-0.04 part;
Wherein, the technical indicator of said components is as follows:
Cement: strength grade >=42.5Mpa, 3d >=22Mpa, 28d >=47Mpa;
Sand: II district's medium sand, silt content≤2.0%, clod content≤0.5%;
Stone: 5-25mm rubble, silt content≤0.5%, clod content≤0.2%, elongated particles≤8%;
Stone flour: stone flour is the common name of the powder of stone, white powder, 300-400 order, CaCO
3content>=90%, iron-holder≤1%, magnesium content≤1%.
Flyash: F class I grade of flyash, water demand ratio≤95%, loss on ignition≤5%;
Zeolite powder: dioxide-containing silica 80-99%, 100-400 order, 1-4mm;
Breeze, S95 level or S105 level activity index 7d >=75%, 28d >=95%;
Silica flour: specific surface area 2000-2800m
3/ ㎏;
Water reducer: polycarboxylate high performance water-reducing agent, concentration >=15%;
Air entrapment agent: AE class air entrapment agent.
Preferably, cement 319 parts, sand 581 parts, 1108 parts, stone, stone flour 32 parts, 165 parts, water, 145 parts, flyash, breeze 87 parts, water reducer 16 parts, zeolite powder 20 parts, silica flour 29 parts, air entrapment agent 0.035 part.
The present invention has the preparation method of the super high strength concrete of super high pump-conveying property, it is characterized in that: its preparation process is as follows:
(1) cement, sand, stone, water, zeolite powder, stone flour, flyash, breeze, water reducer, silica flour and air entrapment agent is taken by preset blending ratio;
(2) add in water reducer by disposable for the air entrapment agent taken in step (1), abundant mix is even, forms the mixture stirred;
(3) sand weighed up in step (1), stone are dropped into stirrer and stir 20-40s; In stirrer, drop into the cement, stone flour, zeolite powder, flyash, breeze and the silica flour that weigh up in step (1) more successively stir 50-80s; Add the mixture stirred in step (2), then add water, stir 50-80s, obtain the super high strength concrete with super high pump-conveying property.
The super high strength concrete with super high pump-conveying property obtained according to above-mentioned preparation method, through following test, records that from slump cone, flowed the time used be 15-25s, and testing method is as follows:
(1) get have in right amount super high strength concrete as test sample pour in container, mix 2-3 time;
(2) put upside down by concrete slump cylinder, large mouth, fills concrete slump cylinder by disposable for sample upward, by floating for large mouth place.
(3) slowly mention slump cone, make concrete lean on own wt to flow out from osculum, record concrete has all flowed the time used.
Positively effect of the present invention is as follows:
The super high strength concrete with super high pump-conveying property of the present invention is for main raw material with cement, sand, stone, stone flour, water, flyash, zeolite powder, breeze, water reducer, silica flour and air entrapment agent, low cost of manufacture, formula rationally, by mixing appropriate short-side chain polycarboxylate high performance water-reducing agent and air entrapment agent effectively reduces concrete viscosity, improve its pumping power, and when water consumption is identical, improve concrete strength; By a certain proportion of amount of air entrainment of admixture, improve concrete mobility; In composition of raw materials, different minerals spike acts on difference in concrete, is mixed by different types of spike with suitable ratio, utilizes the physical action of mutually closely filling of various different-grain diameter, can make up for each other's deficiencies and learn from each other, improve concrete density; In concrete slump cylinder, all flow the time used by test concrete, thus grasp concrete pumping situation easily.
Embodiment
Further will describe in detail embodiments of the invention below.
Embodiment 1:
The proportioning of raw material is as follows: (unit: Kg/m
3)
Wherein: said components meets following index:
Cement: according to Test method for strength of hydraulic cement mortar (GB/T17671-1999) requirement, strength grade >=42.5Mpa, 3d >=22Mpa, 28d >=47Mpa;
Sand: according to construction sand (GB/T14684-2011) standard-required, sand used is: II district's medium sand, silt content≤2.0%, clod content≤0.5%;
Stone: according to construction cobble, rubble (GB/T14685-2011) standard-required stone used be: 5-25mm rubble, silt content≤0.5%, clod content≤0.2%, elongated particles≤8%;
Stone flour: stone flour is the common name of the powder of stone, white powder, 300-400 order, CaCO
3content>=90%, iron-holder≤1%, magnesium content≤1%;
Zeolite powder: dioxide-containing silica 80-99%, 100-400 order, 1-4mm;
Flyash: the fine coal class according to specifying for flyash (GB/T1596-2005) standard in cement and concrete: F class I grade of flyash, water demand ratio≤95%, loss on ignition≤5%;
Breeze: according to for GBFS (GB/T18046-2008) the standard-required breeze in cement and concrete be: S95 level or S105 level activity index 7d >=75%, 28d >=95%;
Silica flour: the silica flour according to silica flour examination criteria (GB/T21236-2007) standard-required: specific surface area 2000-2800m
3/ ㎏;
Water reducer: according to cement water reducing agent utilisation technology code (GB50119-2013) standard-required, selects polycarboxylate high performance water-reducing agent (short-side chain, the water reducer that molecular weight is little), concentration >=15%; Preferably, poly carboxylic acid KJ-JS high-performance water reducing agent is selected;
Air entrapment agent: according to cement water reducing agent utilisation technology code (GB50119-2013) standard-required AE class air entrapment agent.
Preparation method is as follows:
(1) cement, sand, stone, water, flyash, zeolite powder, stone flour, breeze, water reducer, silica flour and air entrapment agent is taken by preset blending ratio;
(2) add in water reducer by disposable for the air entrapment agent taken in step (1), abundant mix is even, forms the mixture stirred;
(3) sand weighed up in step (1), stone are dropped into stirrer and stir 30s; In stirrer, drop into the cement, flyash, stone flour, zeolite powder, breeze and the silica flour that weigh up in step (1) more successively stir 60s; Add the mixture stirred in step (2), then add water, stir 60s, obtain the super high strength concrete with super high pump-conveying property.
By the super high strength concrete with super high pump-conveying property obtained for embodiment 1 through following test, testing method is as follows:
(1) get have in right amount super high strength concrete as test sample pour in container, mix 2-3 time;
(2) put upside down by concrete slump cylinder, large mouth, fills concrete slump cylinder by disposable for sample upward, by floating for large mouth place.
(3) slowly mention slump cone, make concrete lean on own wt to flow out from osculum, record concrete has all flowed the time used.
Record that from slump cone, flowed the time used be 17s.
Test the slump of the super high strength concrete of embodiment 1, divergence and pump-conveying property, test result is as follows:
Embodiment 2:
The proportioning of raw material is as follows: (unit: Kg/m
3)
Wherein: said components meets following index:
Cement: according to Test method for strength of hydraulic cement mortar (GB/T17671-1999) requirement, strength grade >=42.5Mpa, 3d >=22Mpa, 28d >=47Mpa;
Sand: according to construction sand (GB/T14684-2011) standard-required, sand used is: II district's medium sand, silt content≤2.0%, clod content≤0.5%;
Stone: according to construction cobble, rubble (GB/T14685-2011) standard-required stone used be: 5-25mm rubble, silt content≤0.5%, clod content≤0.2%, elongated particles≤8%;
Flyash: the fine coal class according to specifying for flyash (GB/T1596-2005) standard in cement and concrete: F class I grade of flyash, water demand ratio≤95%, loss on ignition≤5%;
Stone flour: stone flour is the common name of the powder of stone, white powder, 300-400 order, CaCO
3content>=90%, iron-holder≤1%, magnesium content≤1%.
Zeolite powder: dioxide-containing silica 80-99%, 100-400 order, 1-4mm;
Breeze: according to for GBFS (GB/T18046-2008) the standard-required breeze in cement and concrete be: S95 level or S105 level activity index 7d >=75%, 28d >=95%;
Silica flour: the silica flour according to silica flour examination criteria (GB/T21236-2007) standard-required: specific surface area 2000-2800m
3/ ㎏;
Water reducer: according to cement water reducing agent utilisation technology code (GB50119-2013) standard-required, select, polycarboxylate high performance water-reducing agent (short-side chain, the water reducer that molecular weight is little), concentration >=15%;
Air entrapment agent: according to cement water reducing agent utilisation technology code (GB50119-2013) standard-required AE class air entrapment agent.
Preparation method is as follows:
(1) cement, sand, stone, water, stone flour, flyash, breeze, water reducer, silica flour and air entrapment agent is taken by preset blending ratio;
(2) add in water reducer by disposable for the air entrapment agent taken in step (1), abundant mix is even, forms the mixture stirred;
(3) sand weighed up in step (1), stone are dropped into stirrer and stir 20s; In stirrer, drop into the cement, flyash, zeolite powder, stone flour, breeze and the silica flour that weigh up in step (1) more successively stir 80s; Add the mixture stirred in step (2), then add water, stir 50s, obtain the super high strength concrete with super high pump-conveying property.
By the super high strength concrete with super high pump-conveying property obtained for embodiment 2 through following test, testing method is as follows:
(1) get have in right amount super high strength concrete as test sample pour in container, mix 2-3 time;
(2) put upside down by concrete slump cylinder, large mouth, fills concrete slump cylinder by disposable for sample upward, by floating for large mouth place.
(3) slowly mention slump cone, make concrete lean on own wt to flow out from osculum, record concrete has all flowed the time used.
Record that from slump cone, flowed the time used be 20s.
Test the slump of the super high strength concrete of embodiment 2, divergence and pump-conveying property, test result is as follows:
Embodiment 3:
The proportioning of raw material is as follows: (unit: Kg/m
3)
Wherein: said components meets following index:
Cement: according to Test method for strength of hydraulic cement mortar (GB/T17671-1999) requirement, strength grade >=42.5Mpa, 3d >=22Mpa, 28d >=47Mpa;
Sand: according to construction sand (GB/T14684-2011) standard-required, sand used is: II district's medium sand, silt content≤2.0%, clod content≤0.5%;
Stone: according to construction cobble, rubble (GB/T14685-2011) standard-required stone used be: 5-25mm rubble, silt content≤0.5%, clod content≤0.2%, elongated particles≤8%;
Stone flour: stone flour is the common name of the powder of stone, white powder, 300-400 order, CaCO3 content >=90%, iron-holder≤1%, magnesium content≤1%.
Flyash: the fine coal class according to specifying for flyash (GB/T1596-2005) standard in cement and concrete: F class I grade of flyash, water demand ratio≤95%, loss on ignition≤5%;
Breeze: according to for GBFS (GB/T18046-2008) the standard-required breeze in cement and concrete be: S95 level or S105 level activity index 7d >=75%, 28d >=95%;
Silica flour: the silica flour according to silica flour examination criteria (GB/T21236-2007) standard-required: specific surface area 2000-2800m
3/ ㎏;
Zeolite powder: dioxide-containing silica 80-99%, 100-400 order, 1-4mm;
Water reducer: according to cement water reducing agent utilisation technology code (GB50119-2013) standard-required, select polycarboxylate high performance water-reducing agent, concentration >=15%;
Air entrapment agent: according to cement water reducing agent utilisation technology code (GB50119-2013) standard-required AE class air entrapment agent.
Preparation method is as follows:
(1) cement, sand, stone, stone flour, zeolite powder, water, flyash, breeze, water reducer, silica flour and air entrapment agent is taken by preset blending ratio;
(2) add in water reducer by disposable for the air entrapment agent taken in step (1), abundant mix is even, forms the mixture stirred;
(3) sand weighed up in step (1), stone are dropped into stirrer and stir 40s; In stirrer, drop into the cement, stone flour, zeolite powder, flyash, breeze and the silica flour that weigh up in step (1) more successively stir 50s; Add the mixture stirred in step (2), then add water, stir 80s, obtain the super high strength concrete with super high pump-conveying property.
By the super high strength concrete with super high pump-conveying property obtained for embodiment 3 through following test, testing method is as follows:
(1) get have in right amount super high strength concrete as test sample pour in container, mix 2-3 time;
(2) put upside down by concrete slump cylinder, large mouth, fills concrete slump cylinder by disposable for sample upward, by floating for large mouth place.
(3) slowly mention slump cone, make concrete lean on own wt to flow out from osculum, record concrete has all flowed the time used.
Record that from slump cone, flowed the time used be 20s.
Test the slump of the super high strength concrete of embodiment 3, divergence and pump-conveying property, test result is as follows:
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (3)
1. there is a super high strength concrete for super high pump-conveying property, it is characterized in that: it comprises the component of following parts by weight:
Cement 300-380 part, sand 570-590 part, stone 1100-1200 part, water 160-175 part, stone flour 30 ~ 35 parts, flyash 135-150 part, zeolite powder 15-25 part, breeze 70-90 part, water reducer 15-20 part, silica flour 22-35 part, air entrapment agent 0.03-0.04 part;
Wherein, the technical indicator of said components is as follows:
Cement: strength grade >=42.5Mpa, 3d >=22Mpa, 28d >=47Mpa;
Sand: II district's medium sand, silt content≤2.0%, clod content≤0.5%;
Stone: 5-25mm rubble, silt content≤0.5%, clod content≤0.2%, elongated particles≤8%;
Stone flour: stone flour is the common name of the powder of stone, white powder, 300-400 order, CaCO
3content>=90%, iron-holder≤1%, magnesium content≤1%;
Flyash: F class I grade of flyash, water demand ratio≤95%, loss on ignition≤5%;
Zeolite powder: dioxide-containing silica 80-99%, 100-400 order, 1-4mm;
Breeze, S95 level or S105 level activity index 7d >=75%, 28d >=95%;
Silica flour: specific surface area 2000-2800m
3/ ㎏;
Water reducer: polycarboxylate high performance water-reducing agent, concentration >=15%;
Air entrapment agent: AE class air entrapment agent.
2. a kind of super high strength concrete with super high pump-conveying property according to claim 1, it is characterized in that: cement 319 parts, sand 581 parts, 1108 parts, stone, stone flour 32 parts, 165 parts, water, 145 parts, flyash, breeze 87 parts, water reducer 16 parts, zeolite powder 20 parts, silica flour 29 parts, air entrapment agent 0.035 part.
3. the arbitrary described a kind of preparation method with the super high strength concrete of super high pump-conveying property of claim 1 or 2, is characterized in that: its preparation process is as follows:
(1) cement, sand, stone, water, stone flour, zeolite powder, flyash, breeze, water reducer, silica flour and air entrapment agent is taken by preset blending ratio;
(2) add in water reducer by disposable for the air entrapment agent taken in step (1), abundant mix is even, forms the mixture stirred;
(3) sand weighed up in step (1), stone are dropped into stirrer and stir 20-40s; In stirrer, drop into the cement, stone flour, zeolite powder, flyash, breeze and the silica flour that weigh up in step (1) more successively stir 50-80s; Add the mixture stirred in step (2), then add water, stir 50-80s, obtain the super high strength concrete with super high pump-conveying property.
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Cited By (6)
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| CN106673533A (en) * | 2017-02-22 | 2017-05-17 | 北京城建九混凝土有限公司 | Concrete and preparation method thereof |
| CN106830802A (en) * | 2017-02-22 | 2017-06-13 | 北京城建九混凝土有限公司 | Concrete and preparation method thereof |
| CN108218276A (en) * | 2018-02-02 | 2018-06-29 | 中国建筑科学研究院有限公司 | Viscosity reduction enhancer for concrete and application thereof |
| CN108529975A (en) * | 2018-05-11 | 2018-09-14 | 郑涛涛 | A kind of concrete and preparation method thereof |
| CN111517714A (en) * | 2020-04-07 | 2020-08-11 | 中铁大桥科学研究院有限公司 | Easily-pumped coarse aggregate-containing ultra-high performance concrete and preparation method thereof |
| CN111995311A (en) * | 2020-09-04 | 2020-11-27 | 仁寿荣达混凝土有限公司 | Preparation method of high-strength concrete and high-strength concrete prepared by same |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106673533A (en) * | 2017-02-22 | 2017-05-17 | 北京城建九混凝土有限公司 | Concrete and preparation method thereof |
| CN106830802A (en) * | 2017-02-22 | 2017-06-13 | 北京城建九混凝土有限公司 | Concrete and preparation method thereof |
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| CN108218276B (en) * | 2018-02-02 | 2021-04-20 | 中国建筑科学研究院有限公司 | Viscosity reduction enhancer for concrete and application thereof |
| CN108529975A (en) * | 2018-05-11 | 2018-09-14 | 郑涛涛 | A kind of concrete and preparation method thereof |
| CN111517714A (en) * | 2020-04-07 | 2020-08-11 | 中铁大桥科学研究院有限公司 | Easily-pumped coarse aggregate-containing ultra-high performance concrete and preparation method thereof |
| CN111995311A (en) * | 2020-09-04 | 2020-11-27 | 仁寿荣达混凝土有限公司 | Preparation method of high-strength concrete and high-strength concrete prepared by same |
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Application publication date: 20160420 |