CN101168482A - High-performance rolling concrete and preparation method thereof - Google Patents
High-performance rolling concrete and preparation method thereof Download PDFInfo
- Publication number
- CN101168482A CN101168482A CNA2007102019286A CN200710201928A CN101168482A CN 101168482 A CN101168482 A CN 101168482A CN A2007102019286 A CNA2007102019286 A CN A2007102019286A CN 200710201928 A CN200710201928 A CN 200710201928A CN 101168482 A CN101168482 A CN 101168482A
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- concrete
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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
-
- 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
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention provides a concrete with high rolling property and relative preparation, for overcoming the defect of prior concrete as short service life. The inventive concrete is made from gelatinizing material, skeleton material, water and additive, wherein the gelatinizing material consumption is 140-220Kg/m3 concrete, the additive is water reducer, which consumption is 0.7-3.0% of the gelatinizing material, the ratio between water and gel is 0.30-0. 5. The preparation comprises that prepares gelatinizing material, water reducer, water, and skeleton water into rolling concrete which apparent density is 2400-2600Kg/m3. Compared with prior art, the inventive high-property rolling concrete reduces water-gel ratio to 0.45, and improves coal ash consumption to 85%, while the produced rolling concrete has long service life, high rolling property, barrier property, freezing resistance, corrosion resistance, carbonation resistance, and low hydration heat, which realizes long service life, technicality, low cost and high safety of rolling concrete dam construction.
Description
Technical field
The present invention relates to a kind of concrete and preparation method thereof, particularly relate to a kind of roller compacted concrete that is used to build a dam and preparation method thereof.
Background technology
Roller compacted concrete is a kind of low, and the layered rolling filling construction because of it has advantages such as gel material content is few, cost is low, construction speed is fast, material source is extensive, becomes the important dam material of Hydraulic and Hydro-Power Engineering.By to the investigation of domestic roller compacted concrete dam and external roller compacted concrete dam (dam, U.S. green hill) and data analysis as can be seen, water consumption is higher, doping quantity of fly ash is low must cause the weather resistance of roller compacted concrete dam bad.With naphthalenesulfonate formaldehyde condensation compound (NSF) is the appearance of the s-generation concrete high efficiency water reducing agent of representative, has further reduced the water consumption of roller compacted concrete, makes doping quantity of fly ash bring up to best level at present--50～60%.On present state of the art, how further to reduce roller compacted concrete water consumption, improve doping quantity of fly ash and remain the roller compacted concrete field technical issues that need to address with technical, economy, security and the weather resistance of real realization rcc dam construction.
Summary of the invention
Technical problem to be solved by this invention provides good high-performance rolling concrete of a kind of weather resistance and preparation method thereof, to overcome the deficiencies in the prior art, really realizes economy, security and the weather resistance of roller compacted concrete.
Technological line of the present invention: the significant parameter that influences the roller compacted concrete weather resistance is water consumption and doping quantity of fly ash, with the weather resistance be distinctive marks, take into account concrete concrete mix workability and intensity and strength development, that take into full account save energy resource and environment protection and be called high performance concrete.The appearance of a new generation's high performance concrete admixture makes that adopting common process to prepare high-performance rolling concrete becomes possibility.The present invention is intended to adopt the polycarboxylic acid series high-performance cement water reducing agent to reduce water-cement ratio significantly, improve the volume of I level/II level flyash, the relation of roller compacted concrete intensity and strength development behind relation by coordinating water consumption and mix workability, the high fly ash of coordination, prepare high performance roller compacted concrete and be used for Hydraulic and Hydro-Power Engineering and build a dam, really realize technical, economy, security and the weather resistance of rcc dam construction.
In order to solve the problems of the technologies described above, based on above-mentioned technological line, the present invention adopts following technical scheme:
High-performance rolling concrete of the present invention is made by gelling material, aggregate, water and admixture, and wherein the consumption of gelling material is 140～220Kg/m
3Concrete, admixture is a water reducer, the consumption of water reducer is 0.7～3.0% of a binder total amount, and water-cement ratio (ratio of water and gelling material) is 0.30～0.50, and it is 2400～2600Kg/m that gelling material, water reducer, water and aggregate are mixed and made into apparent density
3Roller compacted concrete.
Preferably, prepare high-performance rolling concrete according to following proportioning: the consumption of gelling material is 160Kg/m
3Concrete, the consumption of water reducer are 1.6% of binder total amounts, and water-cement ratio is 0.45, and it is 2400～2600Kg/m that gelling material, water reducer, water and aggregate are mixed and made into apparent density
3Roller compacted concrete.
Aforesaid gelling material is made up of the cement of 60～85% flyash and 15～40%, and described flyash is preferably selected GB I level or II level flyash for use, and described cement intensity preferably is not less than 42.5MPa.Flyash is that the dust of fuel-burning power plant discharging is handled the dusty material that obtains through gathering dust, and is the solid trade waste; According to national standard, flyash is divided into Three Estate, is followed successively by I level flyash, II level flyash and III level flyash according to the size of its hydraulically active.When forming gelling material jointly with flyash and cement; it is not only trade waste problem of complex utilization and economizing on resources and energy problem; and environmental protection problem; main is the performance of improving all many-sides of concrete, the degree of flyash higher value application in concrete, i.e. what of doping quantity of fly ash; indicate the height of state of the art; adopt the fly-ash Preparation high performance concrete of big volume, inferior quality, mean that the concrete technology level is higher, have novelty.
Aggregate in the aforesaid high-performance rolling concrete is made up of the stone of 32～50% sand and 50～68%, described sand is preferably selected medium sand for use, when carrying out three gratings, the granularity of stone is preferably in 5～80mm scope, and the granularity of stone is preferably in 5～40mm scope when carrying out two gratings.
Aforesaid water reducer is preferably selected polycarboxylate high performance water-reducing agent for use.Polycarboxylate high performance water-reducing agent be a kind of have slow setting protect mould, the admixture of bleed and reducing function.
Prepare aforementioned high-performance rolling concrete method: promptly got high-performance rolling concrete in 90～120 seconds with stirring in sand, stone, cement, flyash, water reducer and the water input stirrer successively.
Among the above-mentioned preparation method, before with cement and flyash input stirrer, preferably earlier cement and flyash are mixed, its objective is the gelling material of two-pack is mixed mutually, to make the uniform roller-compacting concrete material of quality.
Compared with prior art, adopt the high-performance rolling concrete of prescription of the present invention and method preparation that water-cement ratio is reduced to below 0.45, and the volume of flyash is increased to 85%, the roller compacted concrete of being produced has better weather resistance, higher stone roller property also has impermeability, frost resistance, corrosion stability, anti-carbonization and low aquation calorific value concurrently, has really realized technical, economy, security and the weather resistance of rcc dam construction.Be the concrete various performance perameters of the present invention below:
Roller compacted concrete mix stone roller property is good, and Vc is 3～7s, and the dry regional Vc in the north is 1～2s; The presetting period of roller compacted concrete mix is 15～18 hours, and final setting time is 18～22 hours; With C
9020 is example, and 28 days ultimate compression strength of roller compacted concrete is 15～18MPa, and tensile strength is 1.4～1.6MPa, and 90 days ultimate compression strength is 24～30MPa, and tensile strength is 2.0～2.9MPa; The roller compacted concrete thermal insulation warming in the time of 28 days smaller or equal to 20.0 ℃; The impervious grade W10 of roller compacted concrete of the present invention～W16, freeze proof grade is F100～300.
Roller compacted concrete of the present invention typical case proportioning design and performance see Table 1 and table 2.
Table 1 roller compacted concrete proportioning
Annotate: LHPA is a polycarboxylate high performance water-reducing agent.F/ (F+C) is the per-cent that flyash weight accounts for the gelling material gross weight.Vc is the workability of roller compacted concrete mix, and unit is second.
Table 2 high-performance rolling concrete fundamental property table
Embodiment
Preferred implementation of the present invention:
Raw material: intensity is not less than cement 32Kg, flyash 128Kg, the fineness of 42.5MPa natural sand or artificial sand 883Kg, stone 1325Kg, polycarboxylate high performance water-reducing agent 2.56Kg and the water 72Kg of granularity in 5～40mm scope in the medium sand scope.
Preparation method: at first cement and one in GB I level flyash are mixed, promptly got 1 cubic metre of high-performance rolling concrete in 100 seconds with stirring in sand, stone, the cement that mixes and GB I level fly ash gel material, polycarboxylate high performance water-reducing agent and the water adding forced concrete mixer then.
During making, determine add-on, when adding aggregate, the apparent density of the roller compacted concrete of made is controlled at 2400～2600Kg/m as the sand and the stone of aggregate according to the amount of the roller compacted concrete of required making and desired apparent density
3Scope get final product.
During construction, with the machine of closing a position roller compacted concrete is carried out thin layer and pave, adopt the self-propelled vibratory roller construction technology of shaking/not having and shaking and rolling to be arranged through multipass, closely knit to roller compacted concrete.Its construction technique normalizing is seen " water conservancy project grinding concrete construction standard DL/T5112-2000 ".
Claims (9)
1. high-performance rolling concrete, it is made by gelling material, aggregate, water and admixture, it is characterized in that: the consumption of gelling material is 140～220Kg/m3 concrete, admixture is a water reducer, the consumption of water reducer is 0.7～3.0% of a binder total amount, water-cement ratio is 0.30～0.50, and gelling material, water reducer, water and aggregate are mixed and made into the roller compacted concrete that apparent density is 2400～2600Kg/m3.
2. according to the described high-performance rolling concrete of claim 1, it is characterized in that: the consumption of gelling material is the 160Kg/m3 concrete, the consumption of water reducer is 1.6% of a binder total amount, water-cement ratio is 0.45, and gelling material, water reducer, water and aggregate are mixed and made into the roller compacted concrete that apparent density is 2400～2600Kg/m3.
3. according to claim 1 or 2 described high-performance rolling concretes, it is characterized in that: described gelling material is made up of the cement of 60～85% flyash and 15～40%.
4. according to the described high-performance rolling concrete of claim 3, it is characterized in that: described flyash is GB I level or II level flyash, and described cement intensity is not less than 42.5MPa.
5. according to claim 1 or 2 described high-performance rolling concretes, it is characterized in that: described aggregate is made up of the stone of 32～50% sand and 50～68%.
6. according to the described high-performance rolling concrete of claim 5, it is characterized in that: described sand is medium sand, and its fineness modulus is 2.3～3.1.
7. according to the described high-performance rolling concrete of claim 6, it is characterized in that: the granularity of described stone is 5～40mm.
8. according to claim 1 or 2 described high-performance rolling concretes, it is characterized in that: described water reducer is a polycarboxylate high performance water-reducing agent.
9. the preparation method of a high-performance rolling concrete as claimed in claim 1 or 2 is characterized in that: will drop into to stir in the stirrer as the sand of aggregate and stone, as the cement of gelling material and flyash, water reducer and water successively and promptly get high-performance rolling concrete in 90～120 seconds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007102019286A CN101168482A (en) | 2007-09-30 | 2007-09-30 | High-performance rolling concrete and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007102019286A CN101168482A (en) | 2007-09-30 | 2007-09-30 | High-performance rolling concrete and preparation method thereof |
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| CN101168482A true CN101168482A (en) | 2008-04-30 |
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| CNA2007102019286A Pending CN101168482A (en) | 2007-09-30 | 2007-09-30 | High-performance rolling concrete and preparation method thereof |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102659342A (en) * | 2012-05-14 | 2012-09-12 | 华北水利水电学院 | Retarding superplasticizer composition for roller compacted concrete |
| CN102659355A (en) * | 2012-05-30 | 2012-09-12 | 中水东北勘测设计研究有限责任公司 | High frost resistance roller compacted concrete mortar wrapped stone mixing method |
| CN103253898A (en) * | 2013-05-14 | 2013-08-21 | 广东省水利水电第三工程局 | Novel roller-compacted concrete for dams and preparation method thereof |
| CN103344750A (en) * | 2013-07-08 | 2013-10-09 | 清华大学 | Method for determining road roller compacted concrete composition based on pressing vibration method |
| CN103803914A (en) * | 2013-12-25 | 2014-05-21 | 新疆研科节能科技有限公司 | Roller-compacted and fast-cured concrete and preparation and use methods thereof |
| CN104529322A (en) * | 2014-12-09 | 2015-04-22 | 鞍钢集团矿业公司 | Iron tailings roller compacted concrete for pavement |
| CN106630901A (en) * | 2016-12-16 | 2017-05-10 | 广西金洪混凝土有限公司 | Green high-performance concrete |
| CN107500623A (en) * | 2017-08-17 | 2017-12-22 | 暨南大学 | A kind of high-strength concrete of low water binder ratio high doping quantity of fly ash |
| CN108677643A (en) * | 2018-06-22 | 2018-10-19 | 杜宇 | A kind of grinding coagulation soil composite pavement and preparation method thereof for not cracking, being not required to setting expansion or contraction joints |
| CN109809745A (en) * | 2019-03-15 | 2019-05-28 | 中国电建集团贵阳勘测设计研究院有限公司 | A kind of superelevation content fly ash roller-compacting concrete material damming method and its structure |
| CN111423165A (en) * | 2020-04-01 | 2020-07-17 | 中国能源建设集团广西水电工程局有限公司 | Roller compacted concrete for hydropower station engineering |
| CN111825403A (en) * | 2020-08-01 | 2020-10-27 | 中建西部建设贵州有限公司 | High-dosage activated phosphorus slag powder roller compacted concrete with low heat insulation and temperature rise and good durability |
| CN114671657A (en) * | 2022-04-25 | 2022-06-28 | 中国能源建设集团广西水电工程局有限公司 | Green high-performance roller compacted concrete and application thereof in extra-high arch dam |
-
2007
- 2007-09-30 CN CNA2007102019286A patent/CN101168482A/en active Pending
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102659342A (en) * | 2012-05-14 | 2012-09-12 | 华北水利水电学院 | Retarding superplasticizer composition for roller compacted concrete |
| CN102659355A (en) * | 2012-05-30 | 2012-09-12 | 中水东北勘测设计研究有限责任公司 | High frost resistance roller compacted concrete mortar wrapped stone mixing method |
| CN103253898A (en) * | 2013-05-14 | 2013-08-21 | 广东省水利水电第三工程局 | Novel roller-compacted concrete for dams and preparation method thereof |
| CN103253898B (en) * | 2013-05-14 | 2014-07-23 | 广东省水利水电第三工程局 | Novel roller-compacted concrete for dams and preparation method thereof |
| CN103344750B (en) * | 2013-07-08 | 2015-02-18 | 清华大学 | Method for determining road roller compacted concrete composition based on pressing vibration method |
| CN103344750A (en) * | 2013-07-08 | 2013-10-09 | 清华大学 | Method for determining road roller compacted concrete composition based on pressing vibration method |
| CN103803914B (en) * | 2013-12-25 | 2016-04-27 | 新疆研科节能科技有限公司 | Roll fast concrete and preparation method thereof and using method admittedly |
| CN103803914A (en) * | 2013-12-25 | 2014-05-21 | 新疆研科节能科技有限公司 | Roller-compacted and fast-cured concrete and preparation and use methods thereof |
| CN104529322A (en) * | 2014-12-09 | 2015-04-22 | 鞍钢集团矿业公司 | Iron tailings roller compacted concrete for pavement |
| CN106630901A (en) * | 2016-12-16 | 2017-05-10 | 广西金洪混凝土有限公司 | Green high-performance concrete |
| CN106630901B (en) * | 2016-12-16 | 2019-06-28 | 广西金洪混凝土有限公司 | Green high performance concrete |
| CN107500623A (en) * | 2017-08-17 | 2017-12-22 | 暨南大学 | A kind of high-strength concrete of low water binder ratio high doping quantity of fly ash |
| CN108677643A (en) * | 2018-06-22 | 2018-10-19 | 杜宇 | A kind of grinding coagulation soil composite pavement and preparation method thereof for not cracking, being not required to setting expansion or contraction joints |
| CN109809745A (en) * | 2019-03-15 | 2019-05-28 | 中国电建集团贵阳勘测设计研究院有限公司 | A kind of superelevation content fly ash roller-compacting concrete material damming method and its structure |
| CN111423165A (en) * | 2020-04-01 | 2020-07-17 | 中国能源建设集团广西水电工程局有限公司 | Roller compacted concrete for hydropower station engineering |
| CN111825403A (en) * | 2020-08-01 | 2020-10-27 | 中建西部建设贵州有限公司 | High-dosage activated phosphorus slag powder roller compacted concrete with low heat insulation and temperature rise and good durability |
| CN114671657A (en) * | 2022-04-25 | 2022-06-28 | 中国能源建设集团广西水电工程局有限公司 | Green high-performance roller compacted concrete and application thereof in extra-high arch dam |
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Open date: 20080430 |