CN103145360B - Viscosity modifier for high or ultrahigh-strength concrete - Google Patents

Viscosity modifier for high or ultrahigh-strength concrete Download PDF

Info

Publication number
CN103145360B
CN103145360B CN201310065887.8A CN201310065887A CN103145360B CN 103145360 B CN103145360 B CN 103145360B CN 201310065887 A CN201310065887 A CN 201310065887A CN 103145360 B CN103145360 B CN 103145360B
Authority
CN
China
Prior art keywords
concrete
strength
viscosity
viscosity modifier
powder
Prior art date
Application number
CN201310065887.8A
Other languages
Chinese (zh)
Other versions
CN103145360A (en
Inventor
刘加平
张倩倩
刘建忠
周华新
崔巩
Original Assignee
江苏苏博特新材料股份有限公司
博特建材(天津)有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 江苏苏博特新材料股份有限公司, 博特建材(天津)有限公司 filed Critical 江苏苏博特新材料股份有限公司
Priority to CN201310065887.8A priority Critical patent/CN103145360B/en
Publication of CN103145360A publication Critical patent/CN103145360A/en
Application granted granted Critical
Publication of CN103145360B publication Critical patent/CN103145360B/en

Links

Abstract

The invention relates to a viscosity modifier for high or ultrahigh-strength concrete. The viscosity modifier comprises the following substances in percentage by weight: 2-10% of silica fume, 10-20% of pulverized coal ash, 2-3% of exciting agent and 67-86% of ultrafine powder. The viscosity modifier added into the high or ultrahigh-strength concrete at a ratio of 10-30% can reduce the viscosity of the concrete by 25-60%. By optimizing the particle size distribution of cementitious materials, the bulk density can be increased, the thicknesses of water film layers on the surfaces of particles in a cementitious system can be increased, the adsorption efficiency of a water reducing agent can be improved, the use amount of the water reducing agent can be reduced, and the viscosity of an aqueous solution in concrete can be lowered. Due to the morphology of powder particles and the action of charges on the surfaces of the powder particles, the interaction force of the particles can be reduced, the viscosity of the concrete can be lowered, and the strength of the concrete can not be affected. The viscosity modifier can be also used for a mortar system with low water-cement ratio.

Description

High-strength or super high strength concrete viscosity modifier
Technical field
The present invention relates to a kind of auxiliary for material of construction, belong to concrete admixture class, be specifically related to a kind ofly significantly to reduce concrete viscosity conditioning agent that is high-strength or super high strength concrete viscosity.
Background technology
Along with civil engineering work scale constantly expands, scientific and technological level improves constantly, some high-rise long spans, the continuous appearance of Important building having specific function to require, as the construction etc. of skyscraper, super-span bridge and huge water-control project, require that concrete must have higher intensity, better weather resistance, more excellent stability, these demands facilitate concrete and progressively develop to high-performance and even very-high performance direction from common.The raising of concrete strength realizes mainly through reducing water-cement ratio, and it is comparatively large that this result also in concrete viscosity, causes a series of construction problems such as concrete-agitating, transport, pumping, limit the propagation and employment of high-strength shale ceramsite to a great extent.High-strength particularly super high strength concrete is substantially for prefabricated components at present, and the application example of large scale structure engineering does not substantially also have, let alone pumping construction.
How to reduce the key issue that concrete viscosity becomes high-strength shale ceramsite development.From composition and the preparation method of high-strength shale ceramsite, current adoptable viscosity reducing process is mainly carried out from organic admixture and adulterant two aspect.But still unintelligible to the concrete viscosity mechanism of action about water reducer, still without breakthrough, also there is not the Patents of the organic viscosity-depression agent of concrete at present in the research and development of organic viscosity-depression agent; And there is not patent about concrete viscosity-depression agent or article equally in adulterant aspect, mainly improve concrete work performance by mixing a large amount of flyash at present, mix flyash as everyone knows and can reduce concrete viscosity but larger to concrete intensity effect, totally unfavorable for lifting that is high-strength or ultra-high performance concrete intensity, and fly ash is also day by day deficient, therefore need the novel viscosity modifier of development excellent property badly to reduce the viscosity of high-strength or super high strength concrete.
Summary of the invention
The object of the invention is the shortcoming for high-strength or super high strength concrete viscosity is large at present, construction is difficult, a kind of high-strength or super high strength concrete viscosity modifier is proposed, effectively can lower concrete viscosity, and have that consumption is few, cost is low and on intensity without features such as impacts.
Applicant finds after deliberation: particle surface water film thickness principal reaction water consumption, packing density and particle total specific surface area tripartite surface information; Surface water thicknesses of layers and concrete viscosity closely related, particle surface water film thickness is larger, and concrete viscosity is lower; High-strength or that super high strength concrete viscosity is large major cause is then that to result in particle surface water film thickness little due to low water binder ratio, and particles' interaction power is large.
Based on above-mentioned research, the present invention is made as basis with water film maximize thickness viscosity-reducing machine, gelling material particles grating is optimized by the silicon of admixture different-grain diameter scope ash, superfine powder and flyash, make packing density increase and the surface-area of gelling material can not be caused to increase substantially, namely increase the water layer thickness of particle surface as far as possible; And admixture adsorption efficiency can be improved due to superfine powder, reduce additive usage, reduce solution viscosity in concrete, and reduce particles' interaction power due to the pattern effect of powder granule and surface charge effect, result in concrete viscosity and reduce further.Because particle packing degree of compactness increases, this viscosity modifier can't cause the reduction of concrete strength.
Concrete technical scheme of the present invention is as follows:
A kind of high-strength or super high strength concrete viscosity modifier, is made up of by mass percentage following material:
Silicon ash 2% ~ 10%;
Flyash 10%-20%;
Exciting agent 2% ~ 3%;
Superfine powder 67% ~ 86%.
The median size of described silicon ash is 0.1 μm ~ 0.3 μm, silicon ash in this particle size range can effective other intergranular space such as filling concrete, flyash and fine powder, improve matrix density, be conducive to the release of free water and the raising of concrete strength in space, in addition the high pozzolanic activity of silicon ash can further improve concrete strength.
The fineness of described flyash is preferably 45 μm of square hole sieve screen over-size < 10%, its fineness meets I grade of flyash requirement, not only optimize grain composition, and intergranular friction power can be reduced due to ball effect, improve concrete rheological property.
Described exciting agent is selected from the one in calcium hydroxide, sodium carbonate, calcium oxide or calcium sulfate, and above-mentioned exciting agent can significantly improve adulterant activity, improves concrete strength.
Described superfine powder is selected from one or more arbitrary proportions mixing in super finely ground slag, limestone powder, silica powder; Above-mentioned powder has good hydrophilic property, the feature of easily dispersion, and can significantly improve water reducer adsorption efficiency, effectively improves concrete rheological property.
The median size of described superfine powder is 2 μm ~ 10 μm, and its particle diameter, can Effective Regulation grain composition between silicon ash and cement granules, and this particle size range superfine powder on the impact of water reducer adsorption efficiency significantly.
The present invention optimizes gelling material particles grating by the silicon of admixture above-mentioned different-grain diameter scope ash, superfine powder and flyash, makes packing density increase and the surface-area of gelling material can not be caused to increase substantially.
Each component materials only need mix by viscosity modifier of the present invention, prepares simple, is convenient to promote the use of.
During use, the quality such as high-strength or super high strength concrete viscosity modifier of the present invention replace cement and join in concrete gel material, and its add-on accounts for 10% ~ 30% of concrete gel material total mass, and concrete viscosity can be made to reduce by 25% ~ 60%.
The present invention improves packing density by optimizing gelling material particles grating, increase the water layer thickness of gelling system particle surface, improve the adsorption efficiency of admixture, reduce the consumption of admixture, reduce solution viscosity in concrete, and reduce particles' interaction power due to the pattern effect of powder granule and surface charge effect, and then result in concrete viscosity and reduce.Can improve packing density because viscosity modifier of the present invention contains sub-micron-powder, and superfine powder has certain activity, therefore mixing this viscosity modifier can not reduce concrete strength.Viscosity modifier of the present invention is equally applicable to low water binder ratio mortar.
Embodiment
Below in conjunction with embodiment, further illustrate the present invention.
The median size of " silicon ash " in embodiment is 0.18 μm.
The fineness of " flyash " in embodiment is 45 μm of square hole sieve screen over-size < 10%.
The median size of " superfine powder " in embodiment is 2 μm ~ 10 μm.
" sand-binder ratio " in embodiment refers to the mass ratio of mortar medium sand and gel material content.
Concrete of the present invention passing through in V funnel specifies in basis of time " self-compacting concrete utilisation technology code " CECS203-2006 that carrying out V funnel is measured by time test method.
The viscosity of mortar of the present invention is tested by mortar rheometer (the soft solid test body rheometer of the R/S-SST that Brookfield company produces).
The testing method of mortar divergence of the present invention adopts existing testing method, back cut diameter 70mm, lower port diameter 100mm, the high 60mm of the truncated cone mould of its inner wall smooth used.
embodiment 1
A kind of high-strength or super high strength concrete viscosity modifier, is mixed by mass percentage by following material:
Silicon ash 3%
Flyash 15%
Calcium sulfate 2%
Limestone powder 80%;
Wherein, limestone powder median size be 3.6 μm.
embodiment 2
A kind of high-strength or super high strength concrete viscosity modifier, is mixed by mass percentage by following material:
Silicon ash 10%
Flyash 20%
Calcium oxide 2%
Silica powder 68%;
Wherein, silica powder median size be 2.4 μm.
embodiment 3
A kind of high-strength or super high strength concrete viscosity modifier, is mixed by mass percentage by following material:
Silicon ash 2%
Flyash 15%
Sodium carbonate 3%
Super finely ground slag 25%
Limestone powder 55%;
Wherein, super finely ground slag median size be 6.9 μm, limestone powder median size be 5.1 μm.
embodiment 4
A kind of high-strength or super high strength concrete viscosity modifier, is mixed by mass percentage by following material:
Silicon ash 3%
Flyash 10%
Calcium hydroxide 3%
Super finely ground slag 30%
Silica powder 44%
Limestone powder 10%;
Wherein, super finely ground slag median size be 6.9 μm, silica powder median size be 3.2 μm, limestone powder median size be 5.1 μm.
related experiment and result
With the high-strength or super high strength concrete viscosity modifier that embodiment 1-4 obtains, carry out concrete viscosity and strength comparison test and low water binder ratio mortar viscosity and strength comparison test.Concrete viscosity is then reacted by the time by V funnel, longer by the time, and concrete viscosity is larger; The viscosity of mortar is obtained by mortar rheometer test result, characterizes by plastic viscosity; Test-results is as follows:
1. adopt the high-strength or super high strength concrete of viscosity modifier of the present invention
Each component of the high-strength or super high strength concrete of table 1
The viscosity of high-strength or super high strength concrete shown in table 2 table 1 and strength test results
Table 2 data show: adopt viscosity modifier of the present invention effectively can lower concrete viscosity, and concrete 7d and 28d ultimate compression strength can not reduce because of this viscosity modifier of employing.
2. adopt the mortar of viscosity modifier of the present invention
Each component that table 3 mortar is joined
The viscosity of mortar shown in table 4 table 3 and strength test results
It is 300mm ± 10mm that this test controls mortar divergence by adjustment water reducer consumption.In table 4, data show: during identical divergence, adopt viscosity modifier of the present invention effectively can reduce mortar viscosity, reduce water reducer consumption, and can not reduce mortar strength.

Claims (2)

1. a high-strength or super high strength concrete viscosity modifier, is characterized in that being made up of by mass percentage following material:
Silicon ash 2% ~ 10%;
Flyash 10%-20%;
Exciting agent 2% ~ 3%;
Superfine powder 67% ~ 86%;
The fineness of described flyash is 45 μm of square hole sieve screen over-size < 10%;
Described superfine powder is selected from one or both arbitrary proportions mixing in limestone powder, silica powder;
Described exciting agent is selected from the one in calcium hydroxide, sodium carbonate, calcium oxide or calcium sulfate;
The median size of described superfine powder is 2 μm ~ 10 μm.
2. viscosity modifier according to claim 1, is characterized in that the median size of described silicon ash is 0.1 μm ~ 0.3 μm.
CN201310065887.8A 2013-03-01 2013-03-01 Viscosity modifier for high or ultrahigh-strength concrete CN103145360B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310065887.8A CN103145360B (en) 2013-03-01 2013-03-01 Viscosity modifier for high or ultrahigh-strength concrete

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310065887.8A CN103145360B (en) 2013-03-01 2013-03-01 Viscosity modifier for high or ultrahigh-strength concrete

Publications (2)

Publication Number Publication Date
CN103145360A CN103145360A (en) 2013-06-12
CN103145360B true CN103145360B (en) 2015-06-24

Family

ID=48543746

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201310065887.8A CN103145360B (en) 2013-03-01 2013-03-01 Viscosity modifier for high or ultrahigh-strength concrete

Country Status (1)

Country Link
CN (1) CN103145360B (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104529225B (en) * 2014-12-15 2016-09-14 江苏苏博特新材料股份有限公司 A kind of height and super high strength concrete thinner, its preparation method and application thereof
CN105272027B (en) * 2015-09-23 2017-07-25 江苏苏博特新材料股份有限公司 A kind of compression strength 300MPa above ultra-high performance concretes and preparation method thereof
CN105271890B (en) * 2015-10-23 2017-07-18 武汉比邻科技发展有限公司 A kind of prestress hole path pressure grouting agent and its preparation and application
CN106746842A (en) * 2015-11-20 2017-05-31 衡阳市银利实业有限公司 A kind of concrete viscosity conditioning agent
CN106746869A (en) * 2015-11-20 2017-05-31 衡阳市银利实业有限公司 High-strength concrete viscosity modifier
CN105669072B (en) * 2016-01-17 2020-08-14 北京清迈华清控股(集团)有限公司 High-performance concrete composite admixture produced by high-silicon iron tailings
CN105753424A (en) * 2016-03-01 2016-07-13 程雷 High-strength concrete and load-bearing tile produced from solid waste and process of high-strength concrete and load-bearing tile
CN108623211B (en) * 2017-03-22 2020-09-04 交通运输部公路科学研究所 Special composite viscosity regulator for high-lift pump concrete
CN107021689A (en) * 2017-05-24 2017-08-08 石家庄铁道大学 A kind of Machine-made Sand pump concrete and preparation method thereof
CN107555828A (en) * 2017-09-27 2018-01-09 中建西部建设新疆有限公司 A kind of strong concrete thinner
CN108059410A (en) * 2018-01-02 2018-05-22 南通中厦建筑工程总承包有限公司 A kind of self-compacting concrete and preparation method thereof
CN108484061A (en) * 2018-03-08 2018-09-04 同济大学 A kind of exterior decoration lines and preparation method thereof prepared using ultra-high performance concrete
CN108546009B (en) * 2018-04-27 2021-01-08 湖北工业大学 CaCO doped with multi-scale particle size3High performance concrete slurry admixture
CN109665742A (en) * 2018-12-10 2019-04-23 福建科之杰新材料有限公司 A kind of viscosity reduction type concrete admixture and preparation method thereof based on marble mountain flour
CN109485290A (en) * 2019-01-03 2019-03-19 中国路桥工程有限责任公司 A kind of Machine-made Sand high-strength concrete viscosity modifying material

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1403400A (en) * 2002-10-14 2003-03-19 上海市建筑科学研究院 Admixture specially for high-performance marine concrete
CN1784368A (en) * 2003-05-07 2006-06-07 株式会社日本触媒 Cement admixture and cement admixture composite

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1403400A (en) * 2002-10-14 2003-03-19 上海市建筑科学研究院 Admixture specially for high-performance marine concrete
CN1784368A (en) * 2003-05-07 2006-06-07 株式会社日本触媒 Cement admixture and cement admixture composite

Also Published As

Publication number Publication date
CN103145360A (en) 2013-06-12

Similar Documents

Publication Publication Date Title
Wang et al. The role of fly ash microsphere in the microstructure and macroscopic properties of high-strength concrete
CN105272027B (en) A kind of compression strength 300MPa above ultra-high performance concretes and preparation method thereof
Li et al. Influences of ultrafine slag slurry prepared by wet ball milling on the properties of concrete
Mashaly et al. Effects of marble sludge incorporation on the properties of cement composites and concrete paving blocks
Cristelo et al. Soil stabilisation using alkaline activation of fly ash for self compacting rammed earth construction
Ibrahim et al. Split tensile strength on self-compacting concrete containing coal bottom ash
Flatt et al. Concrete: An eco material that needs to be improved
Rashad Properties of alkali-activated fly ash concrete blended with slag
Silva et al. Properties of self-compacting concrete on fresh and hardened with residue of masonry and recycled concrete
Santamaría et al. Self-compacting concrete incorporating electric arc-furnace steelmaking slag as aggregate
Ercikdi et al. Cemented paste backfill of sulphide-rich tailings: Importance of binder type and dosage
Ahari et al. Effect of various supplementary cementitious materials on rheological properties of self-consolidating concrete
Nazari et al. The role of SiO2 nanoparticles and ground granulated blast furnace slag admixtures on physical, thermal and mechanical properties of self compacting concrete
Melo et al. Effect of Metakaolin’s finesses and content in self-consolidating concrete
Al-Rawas et al. A comparative evaluation of various additives used in the stabilization of expansive soils
Kockal et al. Strength and elastic properties of structural lightweight concretes
Karahan et al. Effect of metakaolin content on the properties self-consolidating lightweight concrete
Uysal et al. The effect of mineral admixtures on mechanical properties, chloride ion permeability and impermeability of self-compacting concrete
Sun et al. Analysis of mechanism on water-reducing effect of fine ground slag, high-calcium fly ash, and low-calcium fly ash
CN103288398B (en) High-performance machine-made sand marine concrete and preparation method thereof
Dehwah Mechanical properties of self-compacting concrete incorporating quarry dust powder, silica fume or fly ash
CN101671986B (en) Road material for producing red mud by using Bayer process
CN103979884B (en) A kind of method utilizing discarded concrete to prepare coal mine filling lotion
US10047006B1 (en) Hyaloclastite pozzolan, hyaloclastite based cement, hyaloclastite based concrete and method of making and using same
Memon et al. Effect of silica fume on the fresh and hardened properties of fly ash-based self-compacting geopolymer concrete

Legal Events

Date Code Title Description
PB01 Publication
C06 Publication
SE01 Entry into force of request for substantive examination
C10 Entry into substantive examination
C41 Transfer of patent application or patent right or utility model
TA01 Transfer of patent application right

Effective date of registration: 20140506

Address after: Jiangning District of Nanjing City, Jiangsu province 211103 Li Quan Lu No. 69

Applicant after: Jiangsu Subute New Materials Co., Ltd.

Applicant after: Bote Building Materials (Tianjin) Co., Ltd.

Address before: 211103, No. 59 West Wan An Road, Jiangning District, Jiangsu, Nanjing

Applicant before: Jiangsu Bote New Materials Co., Ltd.

Applicant before: Jiangsu Subute New Materials Co., Ltd.

Applicant before: Jiangsu Provincial Architectural Science Institute Ltd.

Applicant before: Bote Building Materials (Tianjin) Co., Ltd.

Effective date of registration: 20140506

Address after: Jiangning District of Nanjing City, Jiangsu province 211103 Li Quan Lu No. 69

Applicant after: Jiangsu Subute New Materials Co., Ltd.

Applicant after: Bote Building Materials (Tianjin) Co., Ltd.

Address before: 211103, No. 59 West Wan An Road, Jiangning District, Jiangsu, Nanjing

Applicant before: Jiangsu Bote New Materials Co., Ltd.

Applicant before: Jiangsu Subute New Materials Co., Ltd.

Applicant before: Jiangsu Provincial Architectural Science Institute Ltd.

Applicant before: Bote Building Materials (Tianjin) Co., Ltd.

ASS Succession or assignment of patent right

Owner name: JIANGSU SUBOTE NEW MATERIAL CO., LTD.

Free format text: FORMER OWNER: BOTE NEW MATERIAL CO., LTD., JIANGSU

Effective date: 20140506

C14 Grant of patent or utility model
GR01 Patent grant
CP02 Change in the address of a patent holder
CP02 Change in the address of a patent holder

Address after: No.6 shuiyougang, Gulou District, Nanjing City, Jiangsu Province 210013

Patentee after: JIANGSU SUBOTE NEW MATERIALS Co.,Ltd.

Patentee after: BOTE BUILDING MATERIALS (TIANJIN) Co.,Ltd.

Address before: 211103 No. 69 Liquan Road, Jiangning District, Nanjing City, Jiangsu Province

Patentee before: JIANGSU SUBOTE NEW MATERIALS Co.,Ltd.

Patentee before: BOTE BUILDING MATERIALS (TIANJIN) Co.,Ltd.