CN101293766A - Only volcanic ash doped roller compacted concrete and preparation method thereof - Google Patents
Only volcanic ash doped roller compacted concrete and preparation method thereof Download PDFInfo
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- CN101293766A CN101293766A CNA2008101500273A CN200810150027A CN101293766A CN 101293766 A CN101293766 A CN 101293766A CN A2008101500273 A CNA2008101500273 A CN A2008101500273A CN 200810150027 A CN200810150027 A CN 200810150027A CN 101293766 A CN101293766 A CN 101293766A
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00293—Materials impermeable to liquids
-
- 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
- C04B2111/00439—Physico-chemical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00448—Low heat 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
- C04B2111/26—Corrosion of reinforcement 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/29—Frost-thaw resistance
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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)
Abstract
The invention discloses single-doped tarras compacting concrete and a preparation method thereof. The single-doped tarras compacting concrete is fabricated by adopting gelling material, sandstone aggregates, water and admixture, wherein, the gelling material is composed of components with weight percentages as follows: 35 to 50 percents of cement and 50 to 64 percents of tarras; the consumption of the concrete is 158 to 218 kg/m3; the admixture adopts a water reducing agent and an air entraining agent; the addition amount of the water reducing agent is 0.7 to 1.2 percents of the total amount of the gelling material; the addition amount of the air entraining agent is 0.02 to 0.03 percents of the total amount of the gelling material; the water gel ratio is 0.35 to 0.65; the gelling material, the admixture, the water and the sandstone aggregate are mixed to be fabricated into the compacting concrete, with the apparent density being higher than 2400 kg/m3. The single-doped tarras compacting concrete prepared by the method has the advantages of better technical indicators such as better water impermeability, better frost resistance, better corrosive resistance, lower hydration heat value, etc.
Description
Technical field
The present invention relates to a kind of concrete and preparation method thereof, be specifically related to a kind of only volcanic ash doped roller compacted concrete that is used to build a dam and preparation method thereof.
Background technology
Only volcanic ash doped technology is to adopt continue roller compacted concrete singly to mix I and II flyash as another the roller compacted concrete list spike technology after the Additive technology.Only volcanic ash doped roller compacted concrete is a low, has that gel material content is few, cost is low, construction speed is fast, can reduce the system's of mixing and stirring advantages such as input of founding the factory with respect to two spikes.By as can be seen to the data compilation analysis of domestic roller compacted concrete dam, roller compacted concrete dam is higher to the Additive quality requirements in the gelling material, except that some areas have I and II flyash can be directly uses as the Additive of roller compacted concrete, other all adopt two spikes to replace the Additive of flyash as roller compacted concrete.How to make full use of region resource, reduce engineering cost, guarantee construction quality and progress, realize that science, the feature of environmental protection of rcc dam construction is the roller compacted concrete field technical issues that need to address.
Summary of the invention
The purpose of this invention is to provide a kind of only volcanic ash doped roller compacted concrete with impermeability preferably, frost resistance, corrosion stability and lower aquation calorific value.
Technological line of the present invention: the Additive of gelling material can not guarantee under the situation of requirement of engineering in roller compacted concrete, a kind of with economy, environmental protection, making full use of the material of region resource---volcanic ash has replaced flyash or the two spike adulterant as roller compacted concrete, solved engineering roadblock, simultaneously active effect is played in the temperature control of dam, can guarantee that single spike concrete of every technical indicator of concrete strength and design is called the only volcanic ash doped technology of roller compacted concrete.This technology is mainly determined preferably pozzuolanic by preferred volcanic ash mineral resources, grade by the pozzuolanic particle shape of microcosmic analysis of test methods, chemical group such as scanning electron microscope, X fluorescent spectroscopies, relatively the similarities and differences of itself and adulterant commonly used (flyash etc.) are held its performance; By the comparison of different volcanic ash performances, propose to satisfy the volcanic ash controlling index of only volcanic ash doped roller compacted concrete performance requriements; By the isoparametric test of volcanic ash fineness, compressive strength rate of different milling times, research volcanic ash fineness and active relation.By indoor starting material test and indoor proportioning simultaneous test, analyze the feasibility of only volcanic ash doped roller compacted concrete proportioning, carry out proportioning adjustment and optimization again and be successfully applied to power station damming works construction by the on-site rolling concrete test.
For solving the problems of the technologies described above, based on above-mentioned technological line, the technical solution used in the present invention is: a kind of only volcanic ash doped roller compacted concrete, it is made by gelling material, sandstone aggregate, water and admixture, described sandstone aggregate is made up of the stone of 40～47% sand and 53～60%, and the consumption of described gelling material is 158～218kg/m
3Concrete, it is characterized in that: described admixture is water reducer and air entrapment agent, the volume of water reducer is 0.7～1.2% of a binder total amount, the volume of air entrapment agent is 0.02～0.03% of a binder total amount, water-cement ratio is 0.35-0.65, and it is greater than 2400kg/m that gelling material, admixture, water and sandstone aggregate are mixed and made into apparent density
3Roller compacted concrete; Described gelling material is that 35～50% cement and 50～65% volcanic ash are formed by weight percent.
Three kinds of preferred versions of the present invention: prepare RCC according to following three kinds of proportionings
18010, RCC
18015, RCC
18020 roller compacted concretes: the consumption of gelling material is respectively 158kg/m
3Concrete, 161kg/m
3Concrete and 218kg/m
3Concrete, the volume of water reducer is 0.8% of a binder total amount, the volume of air entrapment agent is respectively 0.02%, 0.02% and 0.03% of a binder total amount, water-cement ratio is respectively: 0.55,0.49 and 0.45, according to said ratio gelling material, admixture, water and sandstone aggregate are mixed and made into apparent density greater than 2400kg/m
3Roller compacted concrete.RCC
18020 roller compacted concretes are two gratings, RCC
18010, RCC
18015 roller compacted concretes are three gratings.
Described cement intensity is not less than 42.5Mpa, and described volcanic ash grinds the volcanic ash of making for the brown tuff, and its processing quality index is as follows:
(1) fineness: 45 μ m screen over-size≤20%; 80 μ m screen over-sizes are controlled at 5%-7%;
(2) water demand ratio≤105%;
(3) water ratio≤1%;
(4) loss on ignition≤10%;
(5) sulphur trioxide≤3%;
(6) activity index 〉=62%.
Described sand is medium sand, water ratio≤6.0%, fineness modulus 2.4～3.0.
Described stone is made up of gravelstone, middle stone and Da Shi, the weight percent of three gratings is a gravelstone: middle stone: Da Shi=1: 1.33: 1, the weight percent of two gratings is a gravelstone: middle stone=1: 1.105, its particle diameter is respectively: the gravelstone particle diameter is 5～20mm, middle stone particle diameter is 20～40mm, and the Da Shi particle diameter is 40～80mm.
When carrying out three gratings, the particle diameter of stone is in 5～80mm scope, and when carrying out two gratings, the particle diameter of stone is in 5～40mm scope.
Another purpose of the present invention provides a kind of method of only volcanic ash doped roller compacted concrete, it is characterized in that: will drop in the forced mixer as the sand of aggregate and stone, as the cement of gelling material and volcanic ash, as the water reducer of admixture and air entrapment agent and water successively and stir 60s, and promptly get only volcanic ash doped roller compacted concrete.
The present invention compared with prior art has the following advantages: adopt the present invention to gather materials on the spot, employing the present invention compares the pollution that can reduce environment with single fly ash, the only volcanic ash doped roller compacted concrete that adopts prescription of the present invention and method to prepare has impermeability, frost resistance, corrosion stability and lower technical indicators such as aquation calorific value preferably, started simultaneously the roller compacted concrete adulterant except that flyash for singly mixing, the thinking of other single spikes; The area of no flyash adopts two spikes to have bigger advantage relatively.
The various performance perameters of concrete of the present invention: with C
18020W8F100 is that the example roller compacted concrete reached ultimate compression strength 20.9Mpa in 28 days, reaches ultimate compression strength 26.5Mpa in 90 days, tensile strength is 2.87Mpa.Roller compacted concrete thermal insulation warming 28 days is less than 20 ℃, VC value 3～7s.The impervious grade of roller compacted concrete of the present invention is W4～W8, and freeze proof grade is F50～F100.
Pozzuolanic processing quality performance index of the present invention and chemical ingredients see Table 1 and table 2 respectively.
Table 1: volcanic ash quality parameter index
Table 2: volcanic ash chemical ingredients
Only volcanic ash doped roller compacted concrete of the present invention typical case proportioning design and performance see Table 3 and table 4:
Table 3: roller compacted concrete proportioning
Table 4: on-site rolling concrete performance test result
Annotate: VC is the workability of roller compacted concrete mixture, and unit is second (s).
Below by embodiment, technical scheme of the present invention is described in further detail.
Embodiment
Preferred implementation (RCC of the present invention
18010 3 gratings):
Raw material: intensity is not less than the cement 55kg of 42.5Mpa, volcanic ash 103kg, and fineness is at the sand 638kg of medium sand scope, particle diameter is at the gravelstone 458kg of 5～20mm, and particle diameter is at the middle stone 612kg of 20～40mm, and particle diameter is at the Da Shi of 40～80mm 458kg, water 87kg, admixture 1.30kg; Wherein water reducer is 1.264kg, and air entrapment agent is 0.036kg, and it is efficient retarding and water reducing agent that water reducer is preferably selected naphthalene for use.Efficient retarding and water reducing agent be a kind of have dispersion force strong, improve the anti-folding of concrete and ultimate compression strength, change workability, have the admixture of delayed coagulation.Air entrapment agent is a kind of admixture that can improve concrete plasticity-, workability, reduction concrete disintegration, bleeding, the freeze proof impervious durability index of raising.
Preparation method: in the amalgamator in positive mixing building, add sand, gravelstone, middle stone, Da Shi, again volcanic ash and cement are added respectively, add admixture and water at last and mix system 60s, promptly get C
180The 10W4F50 concrete.
When mixing the system concrete, as the case may be aggregate is dynamically adjusted, controlled concrete apparent density greater than 2400kg/m
3Get final product.
Constructional method: adopt the machine of closing a position that roller compacted concrete is successively evenly paved, control concrete placement temperature and VC value well according to temperature; Adopt the self-propelled vibratory roller not have to shake and have to shake through the number of rolling of determining and roll, make roller compacted concrete reach closely knit, and detect through the nucleon density instrument, compactness reaches more than 98%; Control the interlayer combination well, upstream antiseepage district successively evenly spreading and roller compacted concrete starch only with the cement and the volcanic ash of water cement ratio, reach rolling effect: " bleeding, flexible, glossy is arranged ".Construction technique normalizing is seen " concrete construction standard DL/T5144-2001 ".
Claims (9)
1. only volcanic ash doped roller compacted concrete, it is made by gelling material, sandstone aggregate, water and admixture, and described sandstone aggregate is made up of the stone of 40～47% sand and 53～60%, and the consumption of described gelling material is 158～218kg/m
3Concrete, it is characterized in that: described admixture is water reducer and air entrapment agent, the volume of water reducer is 0.7～1.2% of a binder total amount, the volume of air entrapment agent is 0.02～0.03% of a binder total amount, water-cement ratio is 0.35-0.65, and it is greater than 2400kg/m that gelling material, admixture, water and sandstone aggregate are mixed and made into apparent density
3Roller compacted concrete; Described gelling material is that 35～50% cement and 50～65% volcanic ash are formed by weight percent.
2. according to the described a kind of only volcanic ash doped roller compacted concrete of claim 1, it is characterized in that: described gel material content is 158kg/m
3Concrete, the volume of water reducer are 0.8% of binder total amounts, and the volume of air entrapment agent is 0.02% of a binder total amount, and water-cement ratio is 0.55, and it is greater than 2400kg/m that gelling material, admixture, water and sandstone aggregate are mixed and made into apparent density
3Roller compacted concrete.
3. according to the described a kind of only volcanic ash doped roller compacted concrete of claim 1, it is characterized in that: described gel material content is 161kg/m
3Concrete, the volume of water reducer are 0.8% of binder total amounts, and the volume of air entrapment agent is 0.02% of a binder total amount, and water-cement ratio is 0.49, and it is greater than 2400kg/m that gelling material, admixture, water and sandstone aggregate are mixed and made into apparent density
3Roller compacted concrete.
4. according to the described a kind of only volcanic ash doped roller compacted concrete of claim 1, it is characterized in that: described gel material content is 218kg/m
3Concrete, the volume of water reducer are 0.8% of binder total amounts, and the volume of air entrapment agent is 0.03% of a binder total amount, and water-cement ratio is 0.45, and it is greater than 2400kg/m that gelling material, admixture, water and sandstone aggregate are mixed and made into apparent density
3Roller compacted concrete.
5. according to the described a kind of only volcanic ash doped roller compacted concrete of claim 1, it is characterized in that: described cement intensity is not less than 42.5Mpa, and described volcanic ash grinds the volcanic ash of making for the brown tuff, and its processing quality index is as follows:
(1) fineness: 45 μ m screen over-size≤20%; 80 μ m screen over-sizes are controlled at 5%-7%;
(2) water demand ratio≤105%;
(3) water ratio≤1%;
(4) loss on ignition≤10%;
(5) sulphur trioxide≤3%;
(6) activity index 〉=62%.
6. according to the described a kind of only volcanic ash doped roller compacted concrete of claim 1, it is characterized in that: described sand is medium sand, water ratio≤6.0%, fineness modulus 2.4～3.0.
7. according to claim 2 or 3 described a kind of only volcanic ash doped roller compacted concretes, it is characterized in that: described stone is made up of gravelstone, middle stone and Da Shi, its weight percent is a gravelstone: middle stone: Da Shi=1: 1.33: 1, its particle diameter is respectively: the gravelstone particle diameter is 5～20mm, middle stone particle diameter is 20～40mm, and the Da Shi particle diameter is 40～80mm.
8. according to the described a kind of only volcanic ash doped roller compacted concrete of claim 4, it is characterized in that: described stone is made up of gravelstone and middle stone, its weight percent is a gravelstone: middle stone=1: 1.105, and its particle diameter is respectively: the gravelstone particle diameter is 5～20mm, middle stone particle diameter is 20～40mm.
9. method for preparing as claim 1,2,3 or 4 described only volcanic ash doped roller compacted concretes, it is characterized in that: will drop in the forced mixer as the sand of aggregate and stone, as the cement of gelling material and volcanic ash, as the water reducer of admixture and air entrapment agent and water successively and stir 60s, and promptly get only volcanic ash doped roller compacted concrete.
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| CNA2008101500273A CN101293766A (en) | 2008-06-11 | 2008-06-11 | Only volcanic ash doped roller compacted concrete and preparation method thereof |
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|---|---|---|---|
| CNA2008101500273A CN101293766A (en) | 2008-06-11 | 2008-06-11 | Only volcanic ash doped roller compacted concrete and preparation method thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104271528A (en) * | 2012-03-12 | 2015-01-07 | 普洛希多企业公司 | Method for manufacturing of supplementary cementitious materials (SCMs) |
| CN106186901A (en) * | 2016-06-29 | 2016-12-07 | 长江水利委员会长江科学院 | A kind of tuff-powder grinding coagulation soil being applicable to high altitude localities |
| CN106517906A (en) * | 2016-10-31 | 2017-03-22 | 张廉 | Roller compacted concrete for hydraulic engineering and preparation method of roller compacted concrete |
| CN108726948A (en) * | 2018-07-04 | 2018-11-02 | 合肥尚涵装饰工程有限公司 | A kind of amendatory trass concrete of intensity and preparation method thereof |
| CN110255994A (en) * | 2019-07-10 | 2019-09-20 | 敖正官 | A kind of cement wraps up in sandstone grinding coagulation soil and its preparation process |
| CN112745068A (en) * | 2019-10-30 | 2021-05-04 | 中交二航局第三工程有限公司 | Concrete doped with modified pozzolanic fine powder and preparation method thereof |
| CN113896463A (en) * | 2021-10-13 | 2022-01-07 | 中电建十一局工程有限公司 | Novel material for interlayer bonding of roller compacted concrete |
| CN115611560A (en) * | 2022-10-18 | 2023-01-17 | 上海建工集团股份有限公司 | Green low-carbon low-shrinkage concrete and preparation method thereof |
-
2008
- 2008-06-11 CN CNA2008101500273A patent/CN101293766A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104271528A (en) * | 2012-03-12 | 2015-01-07 | 普洛希多企业公司 | Method for manufacturing of supplementary cementitious materials (SCMs) |
| CN106242325A (en) * | 2012-03-12 | 2016-12-21 | 普洛希多企业公司 | The method manufacturing supplementary cementitious material (SCMs) |
| 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 |
| CN106186901A (en) * | 2016-06-29 | 2016-12-07 | 长江水利委员会长江科学院 | A kind of tuff-powder grinding coagulation soil being applicable to high altitude localities |
| CN106517906A (en) * | 2016-10-31 | 2017-03-22 | 张廉 | Roller compacted concrete for hydraulic engineering and preparation method of roller compacted concrete |
| CN106517906B (en) * | 2016-10-31 | 2018-09-28 | 张廉 | A kind of hydraulic engineering grinding coagulation soil and preparation method thereof |
| CN108726948A (en) * | 2018-07-04 | 2018-11-02 | 合肥尚涵装饰工程有限公司 | A kind of amendatory trass concrete of intensity and preparation method thereof |
| CN110255994A (en) * | 2019-07-10 | 2019-09-20 | 敖正官 | A kind of cement wraps up in sandstone grinding coagulation soil and its preparation process |
| CN112745068A (en) * | 2019-10-30 | 2021-05-04 | 中交二航局第三工程有限公司 | Concrete doped with modified pozzolanic fine powder and preparation method thereof |
| CN112745068B (en) * | 2019-10-30 | 2022-07-01 | 中交二航局第三工程有限公司 | Concrete doped with modified pozzolanic fine powder and preparation method thereof |
| CN113896463A (en) * | 2021-10-13 | 2022-01-07 | 中电建十一局工程有限公司 | Novel material for interlayer bonding of roller compacted concrete |
| CN115611560A (en) * | 2022-10-18 | 2023-01-17 | 上海建工集团股份有限公司 | Green low-carbon low-shrinkage concrete and preparation method thereof |
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Open date: 20081029 |