CN101805160B - Self-compacting concrete - Google Patents

Self-compacting concrete Download PDF

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Publication number
CN101805160B
CN101805160B CN2010101520753A CN201010152075A CN101805160B CN 101805160 B CN101805160 B CN 101805160B CN 2010101520753 A CN2010101520753 A CN 2010101520753A CN 201010152075 A CN201010152075 A CN 201010152075A CN 101805160 B CN101805160 B CN 101805160B
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Prior art keywords
self
cement
compacting
concrete
parts
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CN2010101520753A
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CN101805160A (en
Inventor
余志武
邱则有
谢友均
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Changsha Juxing Light Weight Building Material Co Ltd
Central South University
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Changsha Juxing Light Weight Building Material Co Ltd
Central South University
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Priority to CN2010101520753A priority Critical patent/CN101805160B/en
Publication of CN101805160A publication Critical patent/CN101805160A/en
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Classifications

    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions 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
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions 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
    • C04B28/06Aluminous cements
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/14Compositions 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 calcium sulfate cements
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00034Physico-chemical characteristics of the mixtures
    • C04B2111/00103Self-compacting mixtures
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00Technologies relating to the processing of minerals
    • Y02P40/10Production of cement, e.g. improving or optimising the production methods; Cement grinding
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use of waste materials as fillers for mortars or concrete

Abstract

The invention discloses a self-compacting concrete, which is characterized by comprising 100 parts of cement, 60-100 parts of coal ash, 20-50 parts of broken porcelain granula, 100-200 parts of broken stone, 1-5 parts of polycarboxylate superplasticizer, 0.001-0.08 part of tackifier, 0.001-0.1 part of defoamer, 280-360 parts of sand and 0.4-1 part of super plasticizer. Consequently, a structure with a complicated shape, thin walls and dense reinforcements can be cast and formed, a formwork can be prevented from being abraded by vibration, an agitator can be prevented from being abraded by the concrete, and thereby the construction speed and the sound restriction of the environment are improved, and the costs of labor, quality guarantee and those expended on other aspects are reduced; and meanwhile, the invention adopts a technology which uses waste porcelain instead of natural aggregate to produce the regeneration self-compacting concrete, and thereby the well meeting the currently proposed environmental-friendly and energy saving theme of a building system, haveing obvious environmental benefit, economic benefit and social benefit, particularly effectively increasing the compression strength, density, splitting tensile strength, rupture strength, elastic modulus and other indexes, and being applicable to continuous casting of dense type reinforcements and abnormal shape structures with large volume, large density and high span.

Description

A kind of self-compacting concrete
(1) technical field
The present invention relates to a kind of self-compacting concrete.
(2) background technology
At present; In concrete construction, pumping is adopted in onsite concrete usually, adopts vibration compactings such as hand-held vibrating head; But face big volume, large span member; Can't guarantee that at all feeding is even, vibration compacting, therefore need to adopt a kind of high property self-compacting concrete that is more suitable for, satisfy the demand.
Self-compacting concrete is higher to workability and durability requirement; Require also very harsh to starting material and proportioning; MIX DESIGN OF SELF COMPACTING CONCRETE need take into full account self-compacting concrete flowability, education resistance, the mutual relationship between fillibility, slurry consumption and volume stability and contradiction thereof.The self-compacting concrete of being known now is mostly to the research of significant parameters such as water consumption, sand coarse aggregate ratio, flyash, swelling agent; But the research for auxiliary ingredients is considerably less; Research to auxiliary material obviously lacks, and therefore, develops a kind of novel self-compacting concrete for being badly in need of.
(3) summary of the invention
The object of the present invention is to provide a kind of self-compacting concrete; Can effectively improve concrete performance; Make the flowability and the cohesiveness of companion and thing better; Have better education resistance, from characteristics such as fillibility, volume stabilities, especially be suitable for the high-density reinforcing bar of big area, large span, the cast of abnormally-structured concrete continuous.
Solution of the present invention is on the basis of existing technology, and a kind of self-compacting concrete is characterized in that comprising 100 parts of cement; Flyash 60-100 part; Broken porcelain particle 20-50 part, rubble 100-200 part, polycarboxylate water-reducer 1-5 part, 0.001~0.08 part of tackifier, skimmer 0.001-0.1 part, sand 280-360 part and superplasticizer 0.4-1 part.Like this, can guarantee that concrete is closely knit well, effectively enhance productivity; Owing to need not vibrate, the time that concrete placement needs shortens significantly, and labor strength reduces significantly; Need number of workers to reduce, can be good at improving Working environment and security, noise does not vibrate; The vibrational arm syndromes of avoiding the hand-held for a long time vibrator of workman to cause is improved concrete surface quality, open bubble or honeycomb and scale can not occur; Need not carry out skin patching, can true to naturely present the texture or the moulding of template surface, increase the structure degree of freedom in design; Need not vibrate, can build the structure of forming shape complicacy, thin-walled and intensive arrangement of reinforcement, avoid the wearing and tearing of vibrating template being produced; Reduce the wearing and tearing of concrete to stirrer; Can reduce the engineering overall cost, reduce cost from improving many aspects such as speed of application, environment limits, reduces artificial to noise and ensure the quality of products, and use waste ceramic to replace natural aggregate to prepare regeneration self-compacting concrete technology; Be well suited for the building system environmental protection and energy saving theme of promotion now; Tangible environmental benefit, economic benefit and social benefit are arranged, particularly can effectively strengthen indexes such as ultimate compression strength, density, split tensile strength, folding strength and Young's modulus, be applicable to various big volumes, big density, large span, intensive reinforcing bar, abnormally-structured continuously poured.
The present invention is that also described rubble is that fine stone gathers materials and coarse crushing stone gathers materials in ratio preparation in 1: 9.Like this, fine stone gathers materials and coarse crushing stone collection forms best filling proportioning, can fill enough fine stones between coarse crushing stone gathers materials and gather materials, and reaches higher degree of compactness, can form more high-intensity concrete product.
The present invention is that also described fine stone aggregate size is 5-10mm, and the gravel aggregate particle diameter is 10-20mm roughly.Like this, adopt rational grain size can access the self-compacting concrete of different degree of compactness, thereby obtain the concrete product of varying strength, thereby satisfy the needs of various working designs, satisfy the requirement of various building structure.
The present invention is that also described sand is medium coarse sand, and the fineness modulus of medium coarse sand is 3.0-2.3.Like this, adopt the sand of different fineness modulus, can better be filled between the aggregate, form the concrete of degree of compactness height, good fluidity, thereby form more high-strength concrete product, thereby satisfy the construction work that various structural strengths are had relatively high expectations.
The present invention is that also described self-compacting concrete also includes fly ash float.Like this, make self-compacting coagulate soil and have performances such as good heat-resistance, heat insulation, fire prevention, can replace materials such as additional high temperature resistant, heat insulation, fire prevention, reduce cost effectively.
The present invention is that also the content of described fly ash float is 3%~10% of cement content.Like this, the fly ash floats that add different amounts can better reach performances such as specific high temperature resistant, heat insulation, fire prevention, can require and require to choose according to working design, to satisfy the needs of varying environment.
The present invention is that also described self-compacting concrete also includes the alkaline activation fly ash float.Like this, have light weight, hollow, heatproof, inexpensive characteristics, mechanical performance of concrete and serviceability are had good improvement.
The present invention is that also the content of described alkaline activation fly ash float is 3%~10% of cement content.Like this, the fly ash float that adds different amounts can better reach better heatproof effect and lighter quality, can effectively practice thrift the consumption of other materials, practices thrift cost.
The present invention is that also described self-compacting concrete also includes fly ash float and alkaline activation fly ash float.Like this, make self-compacting coagulate soil and have performances such as good heat-resistance, heat insulation, fire prevention, hollow, lightweight, can replace materials such as additional high temperature resistant, heat insulation, fire prevention, reduce cost effectively.
The present invention is that also the content of described fly ash float and alkaline activation fly ash float is respectively 3%~10% of cement content.Like this; The fly ash floats that add different amounts can better reach performances such as specific high temperature resistant, heat insulation, fire prevention, can require and require to choose according to working design, to satisfy the needs of varying environment; Simultaneously can be equipped with lighter quality again, effectively reduce material cost.
The present invention is that also described flyash particle diameter is less than or equal to 40 microns, and perhaps its carbon content is less than 8%.Like this, better degree of compactness can be accessed, also better fire resistance can be obtained.
The present invention is that also described broken porcelain particle is less than 20 millimeters.Like this, can access better degree of compactness.
The present invention is that also described cement adopts silicate cement or portland cement or aluminate cement or aluminosulfate cement or ferro-aluminate cement or fluoroaluminate cement or composite Portland cement.Like this, select different cement types flexibly for use, to satisfy the needs of different constructions according to the needs of varying environment and working design.
The present invention is that also described water and cement are than≤0.4.Like this, can reach better flow effect and guarantor and mould function, can better accomplish cast, fillibility is better, can access concrete structure more uniformly densely.
The present invention is that also described self-compacting concrete also includes the steel fiber of 1%-2.5%.Like this, can make concrete structure obtain better anti-segregation ability and resistance to cleavage, when guaranteeing concrete rigidity, can effectively improve the elasticity indexes of concrete structure.
The present invention is that also sand factor is 40%-55% in the aggregate of described self-compacting concrete.Like this, can guarantee to fill closely knit, the degree of compactness of concrete itself is also higher.
(4) embodiment
Below in conjunction with embodiment the present invention is further described.
The embodiment of the invention, self-compacting concrete comprise following component: use 100 parts of cement; Flyash 60-100 part; Broken porcelain particle 20-50 part, rubble 100-200 part, polycarboxylate water-reducer 1-5 part, 0.001~0.08 part of tackifier, skimmer 0.001-0.1 part, sand 280-360 part and superplasticizer 0.4-1 part.
The present invention is that also described rubble is that fine stone gathers materials and coarse crushing stone gathers materials in ratio preparation in 1: 9.
The present invention is that also described fine stone aggregate size is 5-10mm, and the gravel aggregate particle diameter is 10-20mm roughly.
The present invention is that also described sand is medium coarse sand, and the fineness modulus of medium coarse sand is 3.0-2.3.
The present invention is that also described self-compacting concrete also includes fly ash float.
The present invention is that also the content of described fly ash float is 3%~10% of cement content.
The present invention is that also described self-compacting concrete also includes the alkaline activation fly ash float.
The present invention is that also the content of described alkaline activation fly ash float is 3%~10% of cement content.
The present invention is that also described self-compacting concrete also includes fly ash float and alkaline activation fly ash float.
The present invention is that also the content of described fly ash float and alkaline activation fly ash float is respectively 3%~10% of cement content.
The present invention is that also described flyash particle diameter is less than or equal to 40 microns, and perhaps its carbon content is less than 8%.
The present invention is that also described broken porcelain particle is less than 20 millimeters.
The present invention is that also described cement adopts silicate cement or portland cement or aluminate cement or aluminosulfate cement or ferro-aluminate cement or fluoroaluminate cement or composite Portland cement.
The present invention is that also described water and cement are than≤0.4.
The present invention is that also described self-compacting concrete also includes the steel fiber of 1%-2.5%.
The present invention is that also sand factor is 40%-55% in the aggregate of described self-compacting concrete.
The concrete real-time mode of the present invention; Adopt whipping appts; According to said ratio, drop into earlier coarse aggregate such as fine aggregate, rubble and broken porcelain such as sand and flyash and water stirring 30 minutes, an amount of adding flyash is or/and alkaline fly ash float; Drop into cement and concrete admixture gelling material then and stir more than 40 minutes, mix complementary materials such as polycarboxylate water-reducer, tackifier, skimmer and superplasticizer at last.Transport trolley should be with heals cleaning in the car before connecting material, and ponding in the car is discharged, and forbids to add water in the transportation, and the whipping appts rotation is used more than 1 minute then before the discharging.

Claims (7)

1. a self-compacting concrete is characterized in that comprising 100 parts of cement; Flyash 60-100 part; Broken porcelain particle 20-50 part, rubble 100-200 part, polycarboxylate water-reducer 1-5 part, 0.001~0.08 part of tackifier, skimmer 0.001-0.1 part, sand 280-360 part and superplasticizer 0.4-1 part; The fine stone aggregate size is 5-10mm; The gravel aggregate particle diameter is 10-20mm roughly; Sand is medium coarse sand, and the fineness modulus of medium coarse sand is 3.0-2.3, and broken porcelain particle is less than 20 millimeters; Self-compacting concrete also includes fly ash float and alkaline activation fly ash float, and the content of fly ash float and alkaline activation fly ash float is respectively 3%~10% of cement content.
2. a kind of self-compacting concrete according to claim 1 is characterized in that described rubble is that fine stone gathers materials and coarse crushing stone gathers materials in ratio preparation in 1: 9.
3. according to claim 1 or 2 described a kind of self-compacting concretes, it is characterized in that described flyash particle diameter is less than or equal to 40 microns, perhaps its carbon content is less than 8%.
4. according to claim 1 or 2 described a kind of self-compacting concretes, it is characterized in that described cement adopts silicate cement or portland cement or aluminate cement or aluminosulfate cement or ferro-aluminate cement or fluoroaluminate cement or composite Portland cement.
5. according to claim 1 or 2 described a kind of self-compacting concretes, it is characterized in that described water and cement are than≤0.4.
6. according to claim 1 or 2 described a kind of self-compacting concretes, it is characterized in that described self-compacting concrete also includes the steel fiber of 1%-2.5%.
7. according to claim 1 or 2 described a kind of self-compacting concretes, it is characterized in that sand factor is 40%-55% in the aggregate of described self-compacting concrete.
CN2010101520753A 2010-04-21 2010-04-21 Self-compacting concrete Active CN101805160B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140338570A1 (en) * 2013-05-15 2014-11-20 Dale Paul Laurin Concrete mix and products including recycled porcelain

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CN102690084A (en) * 2011-08-25 2012-09-26 江苏荣能集团股份有限公司 Self-compaction concrete with heavily doped fly ash and preparation method thereof
CN102503278A (en) * 2011-11-09 2012-06-20 中冶建工集团有限公司 Large-flowability light-aggregate concrete
RU2515631C1 (en) * 2012-10-24 2014-05-20 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Белгородский государственный технологический университет им. В.Г. Шухова" Heat-insulation structural masonry admixture based on light filler
CN103803904B (en) * 2013-12-30 2015-12-09 北京新航建材集团有限公司 A kind of Self-compacting Lightweight Aggregates Concrete and preparation method thereof
CN106045376B (en) * 2016-06-01 2017-12-22 湖北大学 A kind of low entraining shape steel tube concrete admixture and preparation method thereof
CN108658532B (en) * 2017-03-28 2020-11-17 北京中实上庄混凝土有限责任公司 Self-compacting concrete and preparation method thereof
CN107500574A (en) * 2017-08-14 2017-12-22 昌都龙者高新材料股份有限公司 The 200MPa of compression strength 120 eco-concrete and preparation method thereof
CN109776052A (en) * 2019-03-15 2019-05-21 长安大学 A kind of fiber reinforced lightweight aggregate concrete of self-compaction and preparation method thereof
CN110451866B (en) * 2019-08-15 2021-05-07 浙江大学 Pumpable tough concrete and application thereof in bridge deck continuous plate structure
CN110835252A (en) * 2019-12-16 2020-02-25 南昌航空大学 Steel fiber reinforced self-compacting concrete hexagonal precast block and preparation method thereof
CN111300597A (en) * 2020-03-12 2020-06-19 浙江向往建筑节能科技有限公司 Production process of compression-resistant and shock-resistant aerated concrete block

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CN1096502A (en) * 1993-06-18 1994-12-21 郭成正 High-strength, lightweight, crushed stone concrete
CN1792978A (en) * 2005-12-08 2006-06-28 贵州省公路工程总公司 Machine-made sand self-compacting concrete
CN101139192A (en) * 2007-08-16 2008-03-12 同济大学 Self-compacting fiber reinforcement active powder concrete and method for making same
CN101265057A (en) * 2008-04-08 2008-09-17 甘伟 Mortar and concrete using ceramic slag as blending material, and preparation method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1096502A (en) * 1993-06-18 1994-12-21 郭成正 High-strength, lightweight, crushed stone concrete
CN1792978A (en) * 2005-12-08 2006-06-28 贵州省公路工程总公司 Machine-made sand self-compacting concrete
CN101139192A (en) * 2007-08-16 2008-03-12 同济大学 Self-compacting fiber reinforcement active powder concrete and method for making same
CN101265057A (en) * 2008-04-08 2008-09-17 甘伟 Mortar and concrete using ceramic slag as blending material, and preparation method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140338570A1 (en) * 2013-05-15 2014-11-20 Dale Paul Laurin Concrete mix and products including recycled porcelain

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