CN107777955A - A kind of clear-water concrete - Google Patents
A kind of clear-water concrete Download PDFInfo
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- CN107777955A CN107777955A CN201610737648.6A CN201610737648A CN107777955A CN 107777955 A CN107777955 A CN 107777955A CN 201610737648 A CN201610737648 A CN 201610737648A CN 107777955 A CN107777955 A CN 107777955A
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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
-
- 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
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
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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 a kind of clear-water concrete, is formed by the component of following mass parts：292~310 parts of cement, 66~74 parts of flyash, 38~42 parts of slag powders, 1072~1192 parts of coarse aggregate, 697~769 parts of fine aggregate, 142~158 parts of running water, 7.8~8.6 parts of water reducer.The concrete surface is clean and tidy, natural in color, and the decorative effect that surface can reach splendid is whitewashed without plastering, inlaying patch.
Description
Technical field
The invention belongs to technical field of concrete, more particularly to a kind of clear-water concrete.
Background technology
Concrete, referred to as concrete, refer to a kind of system of the cementing integral engineered composite material of aggregate by binder materials
Claim, usual concrete makees binder materials by cement, sand, masonry aggregate, coordinates by a certain percentage with water, it is agitated obtained by cement
Concrete, above-mentioned aggregate are divided into coarse aggregate and fine aggregate again, wherein, the particle diameter in the sand of skeleton function, stone is played in concrete
Aggregate more than 5mm is referred to as coarse aggregate；The conventional coarse aggregate of concrete has two kinds of rubble and cobble, and rubble is natural rock, ovum
Stone or chats through Mechanical Crushing, be sieved into, particle diameter is more than 5mm rock particles.Cobble is by weathering, current
The length of carrying and sorting, accumulation form, rock particles of the particle diameter more than 5mm, cobble and gravel particle is more than the particle institute
It is elongated piece that symbolic animal of the birth year, which answers 2.4 times of persons of average grain diameter of grade, inevitably contains small part needle-like in existing coarse aggregate
Particle.And fine aggregate is the construction material relative with coarse aggregate, belongs to a kind of relatively small aggregate of diameter, risen in concrete
A kind of granular loose material of skeleton or filling effect, its particle diameter is in below 4.75mm.Either coarse aggregate or fine aggregate, bone
Internal can all mix of material has a certain amount of soil.
Clear-water concrete is a kind of special concrete in existing concrete, refers to directly utilize concrete one-shot forming,
Brush with nature texture or only colourless protective coating, as the concrete of finishing effect, its with surface is clean and tidy, natural in color,
It is target that lines, which meet the design rhythm, can meet the requirement of various architectural images, while has fabulous decorative effect, therefore,
Also known as architectural concrete.Clear-water concrete uses one-time cast-forming, does not do any external decoration, directly utilizes the nature of concrete
Surface effect can save and traditional plaster, inlay patch etc. and whitewash process, unlike normal concrete, clear water as facing
The surface requirements flat smooth of concrete, uniform color, corner angle are clearly demarcated, without clashing and breaking and pollution.Existing clear-water concrete coordinates
Than be all with design of common concrete proportioning method (such as《JGJ 55-2011 design of common concrete proportioning codes》) enter
OK, the incorporation of various dispensings is adjusted as one sees fit, causes the faced concrete surface that pours out rough everywhere, larger color be present
Difference, stomata, gap be larger and skewness, or while surface quality is obtained, the intensity of concrete can not but obtain
Ensure, it is difficult to reach the design requirement of clear-water concrete, can not be directly using the natural surface effect of cast-in-place concrete as decorations
Face, it is still desirable to impose and traditional plaster, inlay patch etc. and whitewash process.
The content of the invention
It is an object of the invention to solve above-mentioned technical problem, there is provided a kind of clear-water concrete, the concrete surface is clean and tidy,
Natural in color, the decorative effect that surface can reach splendid is whitewashed without plastering, inlaying patch.
Technical scheme is as follows：
A kind of clear-water concrete, formed by the component of following mass parts：
292~310 parts of cement, 66~74 parts of flyash, 38~42 parts of slag powders, 1072~1192 parts of coarse aggregate, thin bone
697~769 parts of material, 142~158 parts of running water, 7.8~8.6 parts of water reducer.
Further, clear-water concrete is formed by the component of following mass parts：295~305 parts of cement, flyash 68~72
Part, 39~41 parts of slag powders, 1112~1152 parts of coarse aggregate, 720~746 parts of fine aggregate, 147~153 parts of running water, water reducer
8.0~8.4 parts.
Further, clear-water concrete is formed by the component of following mass parts：300 parts of cement, 70 parts of flyash, slag powders
40 parts, 1132 parts of coarse aggregate, 733 parts of fine aggregate, 150 parts of running water, 8.2 parts of water reducer.
Further, contain mud and flat-elongated particles in the coarse aggregate, contain mud in fine aggregate；By weight percent
Meter, the clay content of the coarse aggregate are less than 1%, and the content of flat-elongated particles is not more than 15%, and the clay content of fine aggregate is not more than
1.5% and fine aggregate modulus of fineness be more than 2.3.
Further, the clay content of the coarse aggregate is less than 0.5%, and the content of flat-elongated particles is 8%, and fine aggregate contains
Mud amount no more than 1% and fine aggregate modulus of fineness be 2.5.
Further, the clod content of the coarse aggregate is less than 0.5%, and the clod content of fine aggregate is not more than 1%.
Further, the clod content of the coarse aggregate is 0.2%, and the clod content of fine aggregate is less than 0.5%.
Further, the cement is the portland cement that grade is not less than 42.5 grades.
Beneficial effects of the present invention：The concrete mix produced by clear-water concrete provided by the present invention proportioning,
Intensity is high, surface is clean and tidy, natural in color and it is uniform, no spillage, trickle and wash away vestige, surface air gap and crack are small, and air gap
It is minimum with fractue spacing area, whitewash the decorative effect that surface can reach splendid without plastering, inlaying patch.And to coarse aggregate
Clay content and flat-elongated particles content, the clay content and modulus of fineness of fine aggregate, and the content of clod are defined, further
Ground promotes the good characteristic that there is clear-water concrete intensity and presentation quality to have both.
Embodiment
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this explanation
Content disclosed by book understands other advantages and effect of the present invention easily.
With reference to embodiment, the invention will be further described：
Embodiment 1：A kind of clear-water concrete, formed by the component of following mass parts：
292 parts of cement, 66 parts of flyash, 38 parts of slag powders, 1072 parts of coarse aggregate, 697 parts of fine aggregate, 142 parts of running water,
7.8 parts of water reducer.
Embodiment 2：A kind of clear-water concrete, formed by the component of following mass parts：301 parts of cement, 69 parts of flyash, ore deposit
39.5 parts of ground-slag, 1130 parts of coarse aggregate, 734 parts of fine aggregate, 149 parts of running water, 8.15 parts of water reducer.
Embodiment 3：A kind of clear-water concrete, formed by the component of following mass parts：310 parts of cement, 74 parts of flyash, ore deposit
42 parts of ground-slag, 1192 parts of coarse aggregate, 769 parts of fine aggregate, 158 parts of running water, 8.6 parts of water reducer.
Embodiment 4：A kind of clear-water concrete, formed by the component of following mass parts：295 parts of cement, 68 parts of flyash, ore deposit
39 parts of ground-slag, 1112 parts of coarse aggregate, 720 parts of fine aggregate, 147 parts of running water, 8.0 parts of water reducer.
Embodiment 5：A kind of clear-water concrete, formed by the component of following mass parts：299 parts of cement, 70.5 parts of flyash,
40.5 parts of slag powders, 1134 parts of coarse aggregate, 732 parts of fine aggregate, 151 parts of running water, 8.25 parts of water reducer.
Embodiment 6：A kind of clear-water concrete, formed by the component of following mass parts：305 parts of cement, 72 parts of flyash, ore deposit
41 parts of ground-slag, 1152 parts of coarse aggregate, 746 parts of fine aggregate, 153 parts of running water, 8.4 parts of water reducer.
Embodiment 7：A kind of clear-water concrete, formed by the component of following mass parts：Clear-water concrete presses following mass parts
Component composition：300 parts of cement, 70 parts of flyash, 40 parts of slag powders, 1132 parts of coarse aggregate, 733 parts of fine aggregate, running water 150
Part, 8.2 parts of water reducer；The concrete best results mixed and stirred by the component proportion, outward appearance after pouring is very clean and tidy, color and luster is equal
Even, stomata, gap are smaller, are highly suitable as ornament materials use.
Cement content Ruo Taigao in coarse aggregate can cause the intensity of clear-water concrete to substantially reduce, and clay content refers in aggregate
Particle diameter is less than 0.075mm thin dust, mud, the content of clay, and easy to break during stress of the flat-elongated particles in coarse aggregate itself
It is disconnected, the intensity of concrete is influenceed, increases the voidage of aggregate, causes the workability of concrete to be deteriorated, so-called workability refers to newly
Mix cement concrete be easy to each operation constructing operation (stirring, transport, cast, tamping etc.), and can obtain uniform quality, shaping it is close
Real performance, its implication is particularly significant for clear-water concrete comprising mobility, cohesiveness and water-retaining property, especially mobility,
It is directly connected to the surface quality after clear-water concrete coagulation forming, such as flat smooth, color evenness, size of gaps point
Cloth etc..The modulus of fineness of fine aggregate is too small to cause aggregate frangible, and concrete strength is low, too high to also result in mobility variation,
And fine aggregate particle diameter itself is in below 4.75mm, therefore the maximum itself with a modulus of fineness is present, to limit fineness
It is excessive and may caused by poor fluidity the problem of, generally, the modulus of fineness of the artificial sand in fine aggregate is in 2.4~2.8 scopes
Interior, the modulus of fineness of natural sand is preferably in the range of 2.2~3.0.In view of this, to ensure the premium properties of clear-water concrete, slightly
The content of mud and flat-elongated particles and the clay content of fine aggregate and modulus of fineness in aggregate all should strictly be limited in suitable model
Within enclosing, by mass percentage, the clay content of the coarse aggregate is less than 1%, and the content of flat-elongated particles is not more than 15%；Carefully
The clay content of aggregate no more than 1.5% and fine aggregate modulus of fineness be more than 2.3.
Embodiment 8：A kind of clear-water concrete, in any one embodiment of previous embodiment 1~7, used thick bone
It is 0.1% to expect clay content, and the content of flat-elongated particles is 0.1%, and the clay content of fine aggregate is 0.1%, the fineness mould of fine aggregate
Number is 2.31.
Embodiment 9：A kind of clear-water concrete, in any one embodiment of previous embodiment 1~7, used thick bone
It is 0.5% to expect clay content, and the content of flat-elongated particles is 7.5%, and the clay content of fine aggregate is 0.75%, the fineness mould of fine aggregate
Number is 2.65.
Embodiment 10：A kind of clear-water concrete, in any one embodiment of previous embodiment 1~7, used thick bone
Expect that clay content is:0.98%, the content of flat-elongated particles is 15%, and the clay content of fine aggregate is 1.5%, the fineness mould of fine aggregate
Number is 3.
Embodiment 11：A kind of clear-water concrete, in any one embodiment of previous embodiment 1~7, coarse aggregate contains mud
Measure as 0.2%, the content of flat-elongated particles is 8%, and the clay content of fine aggregate is 0.3%, and the modulus of fineness of fine aggregate is 2.5.
Embodiment 12：A kind of clear-water concrete, in any one embodiment of previous embodiment 1~7, coarse aggregate contains mud
Measure as 0.35%, the content of flat-elongated particles is 8%, and the clay content of fine aggregate is 0.7%, and the modulus of fineness of fine aggregate is 2.5.
Embodiment 13：A kind of clear-water concrete, in any one embodiment of previous embodiment 1~7, coarse aggregate contains mud
Measure as 0.49%, the content of flat-elongated particles is 8%, and the clay content of fine aggregate is 1%, and the modulus of fineness of fine aggregate is 2.5.
In aggregate, particle of the particle diameter more than 1.18mm and less than 0.6mm after water logging is washed, hand is pinched is clod, due to clod
Fragility, to the intensity effect of clear-water concrete greatly, it is necessary to its content be limited in aggregate, to ensure clear-water concrete
Superperformance.
Embodiment 14：A kind of clear-water concrete, in any one embodiment of previous embodiment 1~7, the clod of coarse aggregate
Content is 0.1%, the clod content 0.1% of fine aggregate.
Embodiment 15：A kind of clear-water concrete, in any one embodiment of previous embodiment 1~7, the clod of coarse aggregate
Content is 0.25%, the clod content 0.5% of fine aggregate.
Embodiment 16：A kind of clear-water concrete, in any one embodiment of previous embodiment 1~7, the clod of coarse aggregate
Content is 0.49%, and the clod content of fine aggregate is 1%.
A certain amount of clod can be between filler aggregate gap, locally split when concrete setting is molded produce microgroove or
Shrink, buffering release pressure, prevent that concrete expansion is lopsided, can promote to form preferable concrete formation surface quality.
Embodiment 17：A kind of clear-water concrete, in any one embodiment of previous embodiment 1~7, the clod of coarse aggregate
Content is 0.2%, and the clod content of fine aggregate is 0.1%.
Embodiment 18：A kind of clear-water concrete, in any one embodiment of previous embodiment 1~7, the clod of coarse aggregate
Content is 0.2%, and the clod content of fine aggregate is 0.3%.
Embodiment 19：A kind of clear-water concrete, in any one embodiment of previous embodiment 1~7, the clod of coarse aggregate
Content is 0.2%, and the clod content of fine aggregate is 0.49%.
Further, be to ensure the intensity of clear-water concrete and surface forming quality when pouring, the cement be grade not
Portland cement less than 42.5 grades.
Further, the flyash is to meet GB/T1596-2005《For the flyash in cement and concrete》Mark
I grade of accurate flyash, the combination property of clear-water concrete can be improved.
Concreting experiment and performance detection：
Take the concrete in above-mentioned all embodiments some, after being stirred more than 90 seconds with forced stirring equipment, respectively
Pour and build up columnar samples block, wall, beam, the coagulation soil sample block of plate, different time repeatedly observe sample block, finds its workability (workability
Can) stable, no bleeding segregation phenomenon.
A, 90min Slump Time losing of Large value is less than 30mm.
B, clear-water concrete mixture enters pump slump value：Column concrete is 150 ± 20mm, wall, beam, the concrete of plate
Slump value is 170 ± 20mm.
C, clear-water concrete presentation quality and the method for inspection：
Column concrete column sample block, wall, beam, plate coagulation soil sample block presentation quality observation and result：
1. color：Observed apart from sample block 5m, color is without obvious aberration.
2. air gap：Air gap disperses, and maximum gauge is not more than 8mm, and depth is not more than 2mm, and every square metre of air gap area is little
In 20cm.
3. crack：Width is less than 0.2mm and length is not more than 1000mm.
4. finish：Surfacing is attractive in appearance, no spillage, trickles and wash away vestige.
After the concreting that the clear-water concrete proportioning provided by above-described embodiment 1~19 is produced, intensity is high, table
Face is clean and tidy, natural in color and it is uniform, no spillage, trickle and wash away vestige, surface air gap and crack are small, and air gap and fractue spacing
Area is minimum, and the decorative effect that surface can reach splendid is whitewashed without plastering, inlaying patch.
The above-described embodiments merely illustrate the principles and effects of the present invention, not for the limitation present invention.It is any ripe
Know the personage of this technology all can carry out modifications and changes under the spirit and scope without prejudice to the present invention to above-described embodiment.Cause
This, those of ordinary skill in the art is complete without departing from disclosed spirit and institute under technological thought such as
Into all equivalent modifications or change, should by the present invention claim be covered.
Claims (9)
1. a kind of clear-water concrete, it is characterised in that formed by the component of following mass parts：
292~310 parts of cement, 66~74 parts of flyash, 38~42 parts of slag powders, 1072~1192 parts of coarse aggregate, fine aggregate 697
~769 parts, 142~158 parts of running water, 7.8~8.6 parts of water reducer.
2. clear-water concrete according to claim 1, it is characterised in that：Formed by the component of following mass parts, cement 295~
305 parts, 68~72 parts of flyash, 39~41 parts of slag powders, 1112~1152 parts of coarse aggregate, 720~746 parts of fine aggregate, originally
147~153 parts of water, 8.0~8.4 parts of water reducer.
3. clear-water concrete according to claim 1, it is characterised in that：Formed by the component of following mass parts, cement 300
Part, 70 parts of flyash, 40 parts of slag powders, 1132 parts of coarse aggregate, 733 parts of fine aggregate, 150 parts of running water, 8.2 parts of water reducer.
4. clear-water concrete according to claim 1, it is characterised in that：Contain mud and flat-elongated particles in the coarse aggregate,
Contain mud in fine aggregate；By mass percentage, the clay content of the coarse aggregate is less than 1%, and the content of flat-elongated particles is little
In 15%, the clay content of fine aggregate is no more than 1.5% and the modulus of fineness of fine aggregate is more than 2.3.
5. clear-water concrete according to claim 4, it is characterised in that：The clay content of the coarse aggregate is less than 0.5%, faller gill
The content of shape particle is 8%, and the clay content of fine aggregate is no more than 1% and the modulus of fineness of fine aggregate is 2.5.
6. clear-water concrete according to claim 4, it is characterised in that：The clod content of the coarse aggregate is less than 0.5%, carefully
The clod content of aggregate is not more than 1%.
7. clear-water concrete according to claim 6, it is characterised in that：The clod content of the coarse aggregate is 0.2%, thin bone
The clod content of material is less than 0.5%.
8. clear-water concrete according to claim 1, it is characterised in that：The cement is the silicic acid that grade is not less than 42.5 grades
Salt cement.
9. clear-water concrete according to claim 1, it is characterised in that：The flyash is to meet GB/T1596-2005
《For the flyash in cement and concrete》I grade of flyash of standard.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610737648.6A CN107777955A (en) | 2016-08-26 | 2016-08-26 | A kind of clear-water concrete |
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| CN201610737648.6A CN107777955A (en) | 2016-08-26 | 2016-08-26 | A kind of clear-water concrete |
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| CN107777955A true CN107777955A (en) | 2018-03-09 |
Family
ID=61439475
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| CN201610737648.6A Pending CN107777955A (en) | 2016-08-26 | 2016-08-26 | A kind of clear-water concrete |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110107089A (en) * | 2019-05-15 | 2019-08-09 | 平煤神马建工集团有限公司 | Municipal works clear-water concrete casting construction method |
| CN111502281A (en) * | 2020-04-27 | 2020-08-07 | 中天交通建设投资集团有限公司 | Municipal engineering clear water concrete pouring construction method |
| CN113511854A (en) * | 2021-03-22 | 2021-10-19 | 中国建筑第二工程局有限公司 | Fair-faced concrete and construction process thereof |
| CN116081985A (en) * | 2023-02-08 | 2023-05-09 | 正定县恒通混凝土有限公司 | Bare concrete |
Citations (2)
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| CN104692730A (en) * | 2015-02-16 | 2015-06-10 | 中交武汉港湾工程设计研究院有限公司 | Fair-faced concrete and application thereof |
| CN105645870A (en) * | 2015-12-31 | 2016-06-08 | 上海建工集团股份有限公司 | Self-compaction bare concrete and preparation method thereof |
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2016
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104692730A (en) * | 2015-02-16 | 2015-06-10 | 中交武汉港湾工程设计研究院有限公司 | Fair-faced concrete and application thereof |
| CN105645870A (en) * | 2015-12-31 | 2016-06-08 | 上海建工集团股份有限公司 | Self-compaction bare concrete and preparation method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110107089A (en) * | 2019-05-15 | 2019-08-09 | 平煤神马建工集团有限公司 | Municipal works clear-water concrete casting construction method |
| CN111502281A (en) * | 2020-04-27 | 2020-08-07 | 中天交通建设投资集团有限公司 | Municipal engineering clear water concrete pouring construction method |
| CN113511854A (en) * | 2021-03-22 | 2021-10-19 | 中国建筑第二工程局有限公司 | Fair-faced concrete and construction process thereof |
| CN113511854B (en) * | 2021-03-22 | 2024-04-12 | 中国建筑第二工程局有限公司 | Fair-faced concrete and as-faced concrete building construction process |
| CN116081985A (en) * | 2023-02-08 | 2023-05-09 | 正定县恒通混凝土有限公司 | Bare concrete |
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