CN109250958A - Extremely frigid zones self-compacting concrete - Google Patents
Extremely frigid zones self-compacting concrete Download PDFInfo
- Publication number
- CN109250958A CN109250958A CN201710572632.9A CN201710572632A CN109250958A CN 109250958 A CN109250958 A CN 109250958A CN 201710572632 A CN201710572632 A CN 201710572632A CN 109250958 A CN109250958 A CN 109250958A
- Authority
- CN
- China
- Prior art keywords
- parts
- water
- reducing agent
- coarse aggregate
- cement
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/29—Frost-thaw resistance
-
- 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
- C04B2111/76—Use at unusual temperatures, e.g. sub-zero
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The present invention relates to a kind of extremely frigid zones self-compacting concretes, it is characterized in that: component is made of coarse aggregate, fine aggregate, cement, flyash, zeolite powder, water-reducing agent, water, wherein: coarse aggregate is no more than the high specific gravity rubble of 20mm using maximum particle diameter, fine aggregate uses high-efficiency water-reducing agent of poly-carboxylic acid using sand in high specific gravity mechanism, water-reducing agent；The parts by weight of each component are as follows: 960~1020 parts of coarse aggregate, 786~834 parts of fine aggregate, 316~328 parts of cement, 142~144 parts of flyash, 29.4~30.6 parts of zeolite powder, 7.33~7.47 parts of water-reducing agent, 146.5~149.5 parts of water.Its advantage is that: have not needing to vibrate to only rely on self weight and can flow and is not isolated full of template, tight reinforcing bar and being able to maintain and uniformity, reach concrete that is sufficiently closely knit and obtaining optimum performance, durability complies with standard code requirement, is fully able to meet the use in winter of the northern area of China cold.
Description
Technical field
The present invention relates to a kind of extremely frigid zones self-compacting concretes, belong to technical field of concrete.
Background technique
Development with building to Super High and complex model technology, traditional form of construction work have been unable to satisfy novel construction
Technique requirement.Self-compacting concrete is flowed freely by itself high specific gravity characteristic, and high density forms, and mainly solving can not
By the complex model concrete or reinforced concrete construction of construction of manually vibrating.Self-compacting concrete is extensive in southern area
It uses, but cold area in north, due to the particular/special requirement that uses raw material, existing self-compacting concrete is unable to satisfy China
The use in winter of northern area cold.The self-compacting concrete that can be used in northern area has no document report.
Summary of the invention
The purpose of the present invention is to solve self-compacting concretes can be in the use in winter of the northern area of China cold
Problem provides a kind of extremely frigid zones self-compacting concrete.
Technical scheme is as follows:
A kind of extremely frigid zones self-compacting concrete, component by coarse aggregate, fine aggregate, cement, flyash, zeolite powder, subtract
Aqua, water are constituted, in which: coarse aggregate is no more than the high specific gravity rubble of 20mm using maximum particle diameter, and fine aggregate uses high specific gravity machine
Sand in system, water-reducing agent use high-efficiency water-reducing agent of poly-carboxylic acid；The parts by weight of each component are as follows: 960~1020 parts of coarse aggregate, fine aggregate
786~834 parts, 316~328 parts of cement, 142~144 parts of flyash, 29.4~30.6 parts of zeolite powder, water-reducing agent 7.33~
7.47 parts, 146.5~149.5 parts of water.
Prepare the feeding sequence of extremely frigid zones self-compacting concrete of the invention: coarse aggregate (stone) → fine aggregate (sand) →
Cementitious material (cement, flyash, zeolite powder) → water and water-reducing agent；It is stirred evenly after feeding intake.
It only relies on self weight the invention has the advantages that having not needing to vibrate and can flow full of template, tight reinforcing bar
And be able to maintain and do not isolate and uniformity, reach concrete that is sufficiently closely knit and obtaining optimum performance, durability complies with standard rule
Model requirement, is fully able to meet the use in winter of the northern area of China cold.
Specific embodiment
The characteristic of extremely frigid zones self-compacting concrete is large fluidity, small water-cement ratio, and preparation, which removes, uses cement, high specific gravity
Outside sand (Machine-made Sand), stone, it is necessary to while mixing mineral admixture (flyash, zeolite powder) and water-reducing agent (polycarboxylic acids).Mineral
Admixture (flyash, zeolite powder) provides guarantee first to enhance the anti-isolation of concrete, improving bleeding, while having inhibition
Alkali-aggregate reaction and raising durability；The use of high-efficiency water-reducing agent of poly-carboxylic acid is to realize that the large fluidity of concrete provides safeguard,
Also have the function of inhibiting alkali-aggregate reaction；Coarse aggregate is no more than the high specific gravity rubble of 20mm using maximum particle diameter, and fine aggregate is adopted
With sand in high specific gravity mechanism, sand, stone need to make alkali content detection.
Extremely frigid zones mix parameters of high-strength self-compacting concrete preparation steps of the invention are as follows:
1. determining the various raw material of Concrete first, using the satisfactory concrete raw material of alkali content.It is first
Secondary to use zeolite powder, enhancing agent on crack resistance of concrete segregability improves bleeding performance, while inhibiting alkali-aggregate reaction and raising concrete resistance to
Long property；Coarse aggregate is no more than the high specific gravity rubble of 20mm using maximum particle diameter, and fine aggregate is using sand in high specific gravity mechanism, sand, stone
Make alkali content detection；Using high-efficiency water-reducing agent of poly-carboxylic acid, to realize that the large fluidity of concrete provides safeguard, it may have inhibit alkali
The effect of aggregate reaction；
To the above-mentioned various preferred supply companies of concrete raw material, every kind of material at least selects three supply companies, experiment
Room sample detection carries out detection to performance indicator, chemical component, alkali content and compares analysis, selects most suitable material supplier:
Cement selection Wula Shan Mountain cement, the electric flyash of flyash choosing China, zeolite powder select glad raw zeolite powder, water-reducing agent that polycarboxylic acids is selected efficiently to subtract
Aqua, thick, fine aggregate choosing reach luxuriant sand, stone.
2. doing consistency check to be confirmed:
Note: sand coarse aggregate ratio: the dosage S/ (the dosage S+ stone dosage G of sand) × 100% of SP=sand, cementitious material is cement, powder
The quality summation of coal ash and zeolite powder, mineral admixture volume: mineral admixture accounts for the percentage of cementitious material, water-cement ratio: water
Ratio of the glue than referring to every cubic meter of concrete water consumption and gel material content.
3. determining each content of raw material using very poor calculating:
4. carrying out match ratio trial using orthogonal test:
Freeze thawing detection, durability detection are carried out to concrete test block, durability complies with standard code requirement, can determine
For final match ratio, for practicing.
Extremely frigid zones mix parameters of high-strength self-compacting concrete
Gross weight: 2450.4kg
Extremely frigid zones self-compacting concrete of the invention is successfully transported in 18 degrees Celsius of environment under the zero in winter of Baotou
It has used in cellular engineering construction.
Claims (1)
1. a kind of extremely frigid zones self-compacting concrete, it is characterized in that: component is by coarse aggregate, fine aggregate, cement, flyash, zeolite
Powder, water-reducing agent, water are constituted, in which: coarse aggregate is no more than the high specific gravity rubble of 20mm using maximum particle diameter, and fine aggregate uses high ratio
Sand in heavy-duty machine system, water-reducing agent use high-efficiency water-reducing agent of poly-carboxylic acid；The parts by weight of each component are as follows: 960~1020 parts of coarse aggregate, thin bone
786~834 parts of material, 316~328 parts of cement, 142~144 parts of flyash, 29.4~30.6 parts of zeolite powder, water-reducing agent 7.33~
7.47 parts, 146.5~149.5 parts of water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710572632.9A CN109250958A (en) | 2017-07-14 | 2017-07-14 | Extremely frigid zones self-compacting concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710572632.9A CN109250958A (en) | 2017-07-14 | 2017-07-14 | Extremely frigid zones self-compacting concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109250958A true CN109250958A (en) | 2019-01-22 |
Family
ID=65050663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710572632.9A Pending CN109250958A (en) | 2017-07-14 | 2017-07-14 | Extremely frigid zones self-compacting concrete |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109250958A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109776053A (en) * | 2019-03-27 | 2019-05-21 | 中国人民解放军95538部队 | A kind of frigid plateau region airfield pavement rubber aggregate special concrete |
| CN111410467A (en) * | 2020-04-28 | 2020-07-14 | 中铁二十二局集团第二工程有限公司 | Self-compacting concrete for high and cold area and preparation method and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101638310A (en) * | 2009-09-15 | 2010-02-03 | 中建三局建设工程股份有限公司 | Self-compaction concrete containing zeolite powder and preparation method thereof |
| WO2013079877A1 (en) * | 2011-12-01 | 2013-06-06 | Ciments Francais | Structural lightweight concrete or mortar, method for manufacturing same and use thereof as self-placing concrete |
-
2017
- 2017-07-14 CN CN201710572632.9A patent/CN109250958A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101638310A (en) * | 2009-09-15 | 2010-02-03 | 中建三局建设工程股份有限公司 | Self-compaction concrete containing zeolite powder and preparation method thereof |
| WO2013079877A1 (en) * | 2011-12-01 | 2013-06-06 | Ciments Francais | Structural lightweight concrete or mortar, method for manufacturing same and use thereof as self-placing concrete |
Non-Patent Citations (1)
| Title |
|---|
| 宋少民等: "《混凝土学》", 31 December 2013, 武汉理工大学出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109776053A (en) * | 2019-03-27 | 2019-05-21 | 中国人民解放军95538部队 | A kind of frigid plateau region airfield pavement rubber aggregate special concrete |
| CN111410467A (en) * | 2020-04-28 | 2020-07-14 | 中铁二十二局集团第二工程有限公司 | Self-compacting concrete for high and cold area and preparation method and application thereof |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190122 |
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| WD01 | Invention patent application deemed withdrawn after publication |