CN101955342A - Formula for preparing white faced as-cast finish concrete composition - Google Patents

Formula for preparing white faced as-cast finish concrete composition Download PDF

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Publication number
CN101955342A
CN101955342A CN 201010511486 CN201010511486A CN101955342A CN 101955342 A CN101955342 A CN 101955342A CN 201010511486 CN201010511486 CN 201010511486 CN 201010511486 A CN201010511486 A CN 201010511486A CN 101955342 A CN101955342 A CN 101955342A
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concrete
parts
prescription
water
formula
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CN101955342B (en
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金振
钱建
冯佳
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Zhejiang Construction Engineering Group Co Ltd
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Zhejiang Construction Engineering Group Co Ltd
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Abstract

The invention discloses a formula for preparing a white faced as-cast finish concrete composition. The formula comprises the following components in part by weight: 200 to 280 parts of cement, 85 to 105 parts of water, 330 to 390 parts of sand, 500 to 580 parts of stone, 2.2 to 4.0 parts of admixture and 1 part of titanium white powder. The component proportion of the formula for preparing the white faced as-cast finish concrete composition is scientific and reasonable, the working performance of the formula meets the concrete pumping and casting requirements, and the formula can achieve the effects on no bleeding, no dissociation, low shrinkage and compactness and strong texture of the formed concrete. The high-flow white as-cast finish concrete prepared by adopting the formula has the advantages of good liquidity, good workability and good water-retaining property during concrete construction, low loss in slump, strong pumping property and the like; and the formula can ensure good strength and surface finish of the formed concrete and ensure that the chromatic aberration meets the quality requirement of the faced as-cast finish concrete.

Description

The prescription for preparing white fair-faced concrete composition
Technical field
The invention belongs to the technical field of building operation, relate in particular to a kind of prescription for preparing white fair-faced concrete composition, adopt the big fluidised form white of this formulated clear-water concrete, good fluidity, good, the good water-retaining property of workability when having concrete construction, advantages such as slump is little through time loss, and pumpability is strong can guarantee the concrete strength after the moulding, surface luster is good, and aberration satisfies the specification of quality of fair-faced concrete.
Background technology
Clear-water concrete claims decorative concrete again; belong to one-time cast-forming; do not do any outer decoration; directly adopt the natural surface effect of onsite concrete as facing; therefore be different from normal concrete, surfacing is smooth, color and luster is even, corner angle are clearly demarcated, no clashing and breaking and pollution, is to be coated with one deck or two-layer transparent protective material on the surface; seem very natural, serious.The clear-water concrete structure does not need to decorate, and has cast out Chemicals such as coating, facing; The once shaped of clear-water concrete structure is not picked cutter and is repaired, do not plaster, and has reduced a large amount of building wastes, helps protecting environment.The hidden danger of quality that the clear water decorative concrete has been avoided plaster cracking, hollowing even come off has alleviated the common quality defect such as spillage, cracks on floor slab of structure construction.
Along with the high speed development of Chinese national economy, some large public buildings adopt fair-faced concrete more and more, directly utilize natural texture behind the concrete formation as finishing effect.For the upholstery of covil construction, the clear-water concrete of white more can satisfy design concept, and range of application is more extensive.The white clear-water concrete is a kind of clear-water concrete of novelty, should satisfy requirements such as structural bearing capacity, has the texture and the white of concrete self again, satisfies the requirement of decoration functions, has very high research and using value.
Building operation requires white clear-water concrete to possess characteristics such as good flowability, cohesiveness, homogeneity and water-retentivity.Require behind the concrete formation that the surface is closely knit, bubble is little and less, no color differnece, intensity reaches requirement.
Existing clear-water concrete seldom adopts white clear-water concrete technology, because the component prescription is unreasonable, and because of the property of white portland cement, the white clear-water concrete that adopts white portland cement to be mixed with has that the difficult control of surperficial texture, aberration are big, slump through the time defectives such as loss is big.
Summary of the invention
In order to overcome above-mentioned defective of the prior art, the invention provides a kind of prescription for preparing white fair-faced concrete composition, adopt the big fluidised form white of this formulated clear-water concrete, good fluidity, good, the good water-retaining property of workability when having concrete construction, advantages such as slump is little through time loss, and pumpability is strong can guarantee the concrete strength after the moulding, surface luster is good, and aberration satisfies the specification of quality of fair-faced concrete.
The prescription for preparing white fair-faced concrete composition, its component and parts by weight are:
200 ~ 280 parts of cement
85 ~ 105 parts in water
330 ~ 390 parts in sand
500 ~ 580 parts in stone
2.2 ~ 4.0 parts of admixtures
1 part of titanium dioxide.
Preferably, described prescription also comprises the flyash of 1 ~ 20 weight part.
More preferably, described fineness of pulverized-coal ash (the 0.045mm square hole sieve tails over)≤12%, loss on ignition≤5%, water content≤1%, sulfur trioxide content≤3%.Use flyash can improve concrete performance, utilize the advantage of Additive, improve concrete workability, water-retentivity, stability as Additive.
Preferably, the whiteness of described cement is greater than 87, and the presetting period, final setting time was less than 10 hours greater than 45 minutes.Adopt fine structure white cement, can improve every performance of cement, guarantee concrete intensity, flowability, workability, water-retentivity.
Preferably, described sand is medium sand, and fineness modulus is 3.0-2.5, silt content<3%, clod content<1%.
Preferably, described stone is rubble, specification 5-25mm continuous grading, color even, silt content<1%, clod content<0.5%, faller gill shape content<15%.The present invention can adopt general aggregate, the optimization of the preferred and proportioning by aggregate, and the gloss of adjustable concrete and chromaticness improve concrete workability, pumpability, reduce contraction.
Preferably, described admixture is a polycarboxylate water-reducer, water-reducing rate〉20%.Use high-quality and efficient poly carboxylic acid SMS retarding water reducer water reducer, can reduce concrete water consumption, control concrete serviceability and loss of slump, initial slump is reached more than the 200mm, slump is more than 140mm after 1 hour.
Preferably, described titanium dioxide is a Rutile type Titanium Dioxide.
Preferably, the acid-basicity of described water is neutral.
Design of clear-water concrete proportioning and raw material quality control are very strict, and the used cement mixing ratio of every block concrete is wanted strict conformance, and fresh concrete must have fabulous workability and cohesiveness, allows to occur the phenomenon of laminated segregation anything but.The starting material place of production must be unified, and used cement is used same batch of same producer as far as possible; The color and luster and the grain composition of sand, stone are even.
The prescription of the white fair-faced concrete composition of preparation of the present invention, component ratio is scientific and reasonable, and its serviceability satisfies concrete pumping and builds requirement, can reach not bleeding, does not emanate, shrinkage is little, and concrete compaction after the moulding, texture are strong.
Adopt the big fluidised form white of this formulated clear-water concrete, good fluidity, good, the good water-retaining property of workability when having concrete construction, slump is little through time loss, advantages such as pumpability is strong, can guarantee the concrete strength after the moulding, surface luster is good, and aberration satisfies the specification of quality of fair-faced concrete.
Embodiment
Each component for preparing white C40 fair-faced concrete composition is as follows:
⑴ the P.W42.5 white portland cement that, cement adopt A Erbo Portland (Anqing) company limited to produce.Leading indicator: whiteness is greater than 87, and the presetting period must not be early than 45min, and final setting time must not be later than 10h, and stability is qualified.Meet the requirement of GBT2015-2005 " white portland cement " standard quality.
⑵, flyash adopt more shallow dam power plant of the Ning Sha autonomous region I level flyash of color, leading indicator: fineness (the 0.045mm square hole sieve tails over)≤12%, loss on ignition≤5%, water content≤1%, sulfur trioxide content≤3% meets GB1596-2005 standard requirements such as " flyash that is used for cement and concrete ".
⑶, sand adopt the Ning Sha autonomous region high lock medium sand in Wuzhong, color even, fineness modulus 2.6, grating is good, silt content<3%, clod content<1% meets the specification of quality of GB/T14684-2001 " building sand ", JGJ52-2006 " regular concrete sand stone quality and test method standard ".
⑷, stone adopt mausoleum rubble under the Ning Sha autonomous region, specification 5-25mm continuous grading, color even, silt content<1%, clod content<0.5%, faller gill shape content<15% meets the specification of quality of GB/T14685-2001 " cobble for building, rubble ", JGJ52-2006 " regular concrete sand stone quality and test method standard ".
⑸, admixture adopt polycarboxylic acid series high efficiency water reducing agent, and model specification is the SMS retardation setting type, water-reducing rate〉20%, and contain compositions such as an amount of slow setting, bleed, froth breaking.
⑹, titanium dioxide adopt rutile-type (Rutile R type) titanium dioxide, obviously improve concrete slump on the one hand, obviously reduce loss of slump, improve concrete surface gloss on the other hand.
⑺, hydromining tap water, the soda acid check is neutral.
Below be the prescription of 5 kinds of different ratioss:
Prescription Cement Flyash Water Sand Stone Admixture Titanium dioxide
1 462kg 24kg 185kg 696kg 1043kg 4.9kg 1.9kg
2 466kg 20kg 185kg 696kg 1043kg 4.9kg 1.9kg
3 471kg 15kg 185kg 696kg 1043kg 4.9kg 2.0kg
4 476kg 10kg 185kg 696kg 1043kg 5.0kg 2.0kg
5 468kg 10kg 180kg 686kg 1026kg 5.8kg 2.0kg
Parameters by the clear-water concrete of above-mentioned 5 kinds of formulated is as shown in the table:
Concrete flowability, water-retentivity, intensity all meet the demands as can be seen from the above table, and particularly the slump behind the 60min reaches more than the 140mm, satisfy the concrete pumping requirement.

Claims (9)

1. the prescription for preparing white fair-faced concrete composition, its component and parts by weight are:
200 ~ 280 parts of cement
85 ~ 105 parts in water
330 ~ 390 parts in sand
500 ~ 580 parts in stone
2.2 ~ 4.0 parts of admixtures
1 part of titanium dioxide.
2. prescription as claimed in claim 1 is characterized in that described prescription also comprises the flyash of 1 ~ 20 weight part.
3. prescription as claimed in claim 2 is characterized in that, described fineness of pulverized-coal ash≤12%, loss on ignition≤5%, water content≤1%, sulfur trioxide content≤3%.
4. prescription as claimed in claim 1 is characterized in that, the whiteness of described cement is greater than 87, and the presetting period, final setting time was less than 10 hours greater than 45 minutes.
5. prescription as claimed in claim 1 is characterized in that, described sand is medium sand, and fineness modulus is 3.0-2.5, silt content<3%, clod content<1%.
6. prescription as claimed in claim 1 is characterized in that, described stone is rubble, specification 5-25mm continuous grading, color even, silt content<1%, clod content<0.5%, faller gill shape content<15%.
7. prescription as claimed in claim 1 is characterized in that, described admixture is a poly carboxylic acid SMS retarding water reducer, water-reducing rate〉20%.
8. prescription as claimed in claim 1 is characterized in that described titanium dioxide is a Rutile type Titanium Dioxide.
9. prescription as claimed in claim 1 is characterized in that, the acid-basicity of described water is neutral.
CN2010105114867A 2010-10-19 2010-10-19 Formula for preparing white faced as-cast finish concrete composition Active CN101955342B (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102643063A (en) * 2012-04-06 2012-08-22 浙江省建工集团有限责任公司 Slag powder-doped composition for preparing white facing as-cast finish concrete
CN103848604A (en) * 2012-11-30 2014-06-11 南京工业大学 Graded cobblestone bare self-compaction concrete and molding device thereof
CN103979905A (en) * 2014-03-31 2014-08-13 安徽鑫润新型材料有限公司 Titanium dioxide doped concrete and preparation method thereof
CN106316296A (en) * 2016-08-24 2017-01-11 浙江省建工集团有限责任公司 Formulation suitable for grain reserve warehouse silo slips form construction concrete
CN108545988A (en) * 2018-05-10 2018-09-18 北京市蓝宝新技术股份有限公司 Clear-water concrete special additive and preparation method thereof and the clear-water concrete comprising it and application
CN108996969A (en) * 2018-09-07 2018-12-14 上海建工材料工程有限公司 A kind of white self-compaction clear water C40 pump concrete
CN110041027A (en) * 2019-04-22 2019-07-23 上海建工一建集团有限公司 A kind of clear-water concrete material and preparation method
CN110981342A (en) * 2019-12-17 2020-04-10 广西四维材料科技股份有限公司 High-strength white concrete

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CN1096502A (en) * 1993-06-18 1994-12-21 郭成正 High-strength, lightweight, crushed stone concrete
CN101328043A (en) * 2008-05-23 2008-12-24 中建三局建设工程股份有限公司 Preparation of high brilliant white high weatherability white concrete
CN101353241A (en) * 2008-09-16 2009-01-28 中国建筑第三工程局商品混凝土供应站成都分站 Machine-made sand fair-faced concrete mixer

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CN1096502A (en) * 1993-06-18 1994-12-21 郭成正 High-strength, lightweight, crushed stone concrete
CN101328043A (en) * 2008-05-23 2008-12-24 中建三局建设工程股份有限公司 Preparation of high brilliant white high weatherability white concrete
CN101353241A (en) * 2008-09-16 2009-01-28 中国建筑第三工程局商品混凝土供应站成都分站 Machine-made sand fair-faced concrete mixer

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102643063A (en) * 2012-04-06 2012-08-22 浙江省建工集团有限责任公司 Slag powder-doped composition for preparing white facing as-cast finish concrete
CN102643063B (en) * 2012-04-06 2013-07-31 浙江省建工集团有限责任公司 Slag powder-doped composition for preparing white facing as-cast finish concrete
CN103848604A (en) * 2012-11-30 2014-06-11 南京工业大学 Graded cobblestone bare self-compaction concrete and molding device thereof
CN103979905A (en) * 2014-03-31 2014-08-13 安徽鑫润新型材料有限公司 Titanium dioxide doped concrete and preparation method thereof
CN103979905B (en) * 2014-03-31 2016-04-13 安徽鑫润新型材料有限公司 A kind of concrete mixing titanium dioxide and preparation method thereof
CN106316296A (en) * 2016-08-24 2017-01-11 浙江省建工集团有限责任公司 Formulation suitable for grain reserve warehouse silo slips form construction concrete
CN108545988A (en) * 2018-05-10 2018-09-18 北京市蓝宝新技术股份有限公司 Clear-water concrete special additive and preparation method thereof and the clear-water concrete comprising it and application
CN108996969A (en) * 2018-09-07 2018-12-14 上海建工材料工程有限公司 A kind of white self-compaction clear water C40 pump concrete
CN108996969B (en) * 2018-09-07 2021-09-24 上建广亚工程材料有限公司 White self-compacting clear water C40 pump concrete
CN110041027A (en) * 2019-04-22 2019-07-23 上海建工一建集团有限公司 A kind of clear-water concrete material and preparation method
CN110981342A (en) * 2019-12-17 2020-04-10 广西四维材料科技股份有限公司 High-strength white concrete

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