CN105948619A - Anti-crack mass concrete prepared by utilizing fly ash and mineral powder double-mixing technology - Google Patents

Anti-crack mass concrete prepared by utilizing fly ash and mineral powder double-mixing technology Download PDF

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Publication number
CN105948619A
CN105948619A CN201610273924.8A CN201610273924A CN105948619A CN 105948619 A CN105948619 A CN 105948619A CN 201610273924 A CN201610273924 A CN 201610273924A CN 105948619 A CN105948619 A CN 105948619A
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China
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concrete
mixing technology
preparation
water reducer
breeze
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CN201610273924.8A
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Chinese (zh)
Inventor
陈军超
彭钟
宋明健
李萍
陈武斌
刘雍贵
翟方
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Mcc 19 Chengdu Construction Co Ltd
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Mcc 19 Chengdu Construction Co Ltd
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Priority to CN201610273924.8A priority Critical patent/CN105948619A/en
Publication of CN105948619A publication Critical patent/CN105948619A/en
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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
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/04—Silica-rich materials; Silicates
    • C04B14/06—Quartz; Sand
    • 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
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
    • C04B18/08—Flue dust, i.e. fly ash
    • 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
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/14—Waste materials; Refuse from metallurgical processes
    • C04B18/141—Slags
    • 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
    • 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
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Civil Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

The invention relates to an anti-crack mass concrete prepared by utilizing a fly ash and mineral powder double-mixing technology, belonging to the technical field of building materials. A technical problem solved by the invention is to provide the anti-crack-crack mass concrete prepared by utilizing the fly ash and mineral powder double-mixing technology. The concrete is prepared from the following components in parts by weight: 1 part of concrete, 0.4 to 0.68 part of water, 3.1 to 4.2 parts of gravels, 2.3 to 3.1 parts of machine-made sand, 0.06 to 0.26 part of fly ash, 0.06 to 0.19 part of mineral powder and 0.006 to 0.025 part of an additive, wherein the concrete is P.O42.5R concrete. According to the invention, by adopting specific components and proportions, the prepared mass concrete has the following advantages: workability is good; strength is high; the setting time of the concrete can be controlled by adjusting the usage amount of the additive; the construction time is easy to be controlled; concrete construction is convenient; the preparation method is simple and practicable; and the concrete has low construction cost and can be extensively popularized and applied.

Description

Utilize flyash and the anti-cracking large volume concrete of breeze dual mixing technology preparation
Technical field
The present invention relates to the use of flyash and the anti-cracking large volume concrete of breeze dual mixing technology preparation, belong to construction material Technical field.
Background technology
Modern architecture relates to mass concrete construction often, such as high-rise building basis, large equipment base, blast furnace Basis, water resources dam etc..Its main feature is exactly that volume is big, and general entity minimum dimension is more than or equal to 1m.Its surface Coefficients comparison is little, and hydration heat of cement release ratio is relatively concentrated, and the internal ratio that heats up is very fast.When temperature difference between inside and outside concrete is bigger, can make to mix The raw thermal cracking of solidifying local products, affects structural safety and normal use.
At present, the thinking of mix proportion design of mass concrete is " low hydration heat, low internal stress, low early strength ", I.e. using low hydration heat cement as the cementitious matter of mass concrete, the early stage internal stress making concrete is low, the most in early days Intensity is the lowest.If improving its early strength, use existing mix-design technology it is difficult to ensure that do not ftracture.
Patent CN103396060A discloses a kind of concrete mix for mass concrete construction, this concrete Mixture can improve its durability, reduce the generation in its crack on the basis of ensureing concrete structure structural strength.This is mixed Compound is made up of the raw material of following weight portion: cement 0.8～1.2；Water 0.2～0.6；Coarse aggregate 4.4～4.8, fine aggregate 3.2～ 3.6, flyash 0.1～0.3；Breeze 0.1～0.2, additive 0.008～0.009.Although this concrete is large volume coagulation Soil, but it is in order to reduce the heat of hydration to greatest extent, selected cement be low-heat cement and cement consumption less, will cause mixing Solidifying soil early strength is the highest, it is impossible to be applicable to the concrete construction that early strength relatively tightly and is required by the duration.
Summary of the invention
Present invention solves the technical problem that to be to provide utilizes the anti-cracking large volume of flyash and the preparation of breeze dual mixing technology to mix Solidifying soil.
The present invention utilizes flyash and the anti-cracking large volume concrete of breeze dual mixing technology preparation, by the group of following weight portion Divide and make:
Wherein, described cement is P.O42.5R cement.
It is 5～25mm continuous grading rubbles that described rubble preferably employs particle diameter.
Described Machine-made Sand preferably employs the washing Machine-made Sand of modulus of fineness 2.5～3.0.
Preferably, at least one during described additive is water reducer, retarder, air entraining agent, defoamer.Outside the most described Adding agent is water reducer.
Preferably, during described water reducer is poly carboxylic acid series water reducer, naphthalene water reducer, ligninsulfonate water reducer at least One, more preferably poly carboxylic acid series water reducer.
Preferably, the present invention utilizes flyash and the anti-cracking large volume concrete of breeze dual mixing technology preparation, by The component of following weight portion is made:
Mineral admixture is mostly industrial waste, adds in concrete, is possible not only to reduce cost, improves the work of concrete The performance such as the property made, durability, moreover it is possible to turn waste into wealth, protects environment, becomes one of beneficially Sustained Development for Concrete Industry Measure.It is currently used for the mineral admixture of concrete, mainly has flyash, slag micropowder (abbreviation breeze) etc..Flyash is fire The waste material of power plant, is made up of the vitreous body of the spherical particle differed in size, and smooth surface is fine and close, in concrete mix, Have and increase the mobility of concrete, reduce bleeding, improve workability, improve the effect of pumpability, obtain everybody unanimously recognize Can, engineering is widely used.Breeze be ironmaking time discharge waste residue, through grinding process have certain fineness and The micropowder that grade is joined, breeze mixes in concrete has " micro aggregate effect " and " volcano ash effect ".
The present invention compared with prior art, there is advantages that
1) present invention is by utilizing concrete admixture flyash, breeze material to replace part of cement, reduce concrete water The characteristic of heat-transformation amount, the mass concrete of preparation, workability is good, intensity high (up to C40 grade), and its setting time can lead to Crossing the consumption control adjusting additive, the engineering time is easy to control, and concrete construction is convenient.
2) use washing Machine-made Sand few due to clay content, the most weak to the adsorptivity of concrete admixture, better ensure that The workability of concrete and ensure that mass concrete causes the probability of cracking because aggregate clay content is too high.
3) using specified raw material and proportioning, making concrete elastic modelling quantity in early days increase increases Tong Bu with intensity, prevents The cracking of concrete when early strength increases.Obtained concrete has the advantage that early strength is high, it is adaptable to because of engineering work The special construction position that early age strength of concrete relatively tightly and is required by the phase.
4) present invention uses on Highrise Building With Raft Foundation, respond well, and concrete surface does not find crackle, formula Simply, compound method is the most simple, and because adding the concrete admixture lower than cement price, its cost is low, can be wide General popularization and application.
Detailed description of the invention
The present invention utilizes flyash and the anti-cracking large volume concrete of breeze dual mixing technology preparation, by the group of following weight portion Divide and make:
Wherein, described cement is P.O42.5R cement.
It is 5～25mm continuous grading rubbles that described rubble preferably employs particle diameter, and its rubble meets GB GB/T 14685- Regulation to continuous size fraction in 2011.
Described Machine-made Sand preferably employs the washing Machine-made Sand of modulus of fineness 2.5～3.0.
Additive commonly used in the art is all applicable to the present invention, it is preferred that described additive is water reducer, retarder, draws At least one in gas agent, defoamer.The most described additive is water reducer.
Water reducer is water reducer commonly used in the art, it is preferred that described water reducer is poly carboxylic acid series water reducer, naphthalene system diminishing At least one in agent, ligninsulfonate water reducer, more preferably poly carboxylic acid series water reducer.
Preferably, the present invention utilizes flyash and the anti-cracking large volume concrete of breeze dual mixing technology preparation, by The component of following weight portion is made:
Mineral admixture is mostly industrial waste, adds in concrete, is possible not only to reduce cost, improves the work of concrete The performance such as the property made, durability, moreover it is possible to turn waste into wealth, protects environment, becomes one of beneficially Sustained Development for Concrete Industry Measure.It is currently used for the mineral admixture of concrete, mainly has flyash, slag micropowder (abbreviation breeze) etc..Flyash is fire The waste material of power plant, is made up of the vitreous body of the spherical particle differed in size, and smooth surface is fine and close, in concrete mix, Have and increase the mobility of concrete, reduce bleeding, improve workability, improve the effect of pumpability, obtain everybody unanimously recognize Can, engineering is widely used.Breeze be ironmaking time discharge waste residue, through grinding process have certain fineness and The micropowder that grade is joined, breeze mixes in concrete has " micro aggregate effect " and " volcano ash effect ".
The present invention utilizes flyash and the anti-cracking large volume concrete of breeze dual mixing technology preparation, can use conventional method system For obtaining, it is possible to adopt with the following method: will rubble, river sand, cement, flyash addition blender stir, simultaneously successively Water reducer is fed first in concrete-agitating water going mixing, then water and additive mixing liquid is joined concrete and is stirred Mixing in machine, after being sufficiently stirred for 1～2.5min, concrete mix draws off from blender, concrete tank transport construction Scene, carries out follow-up construction.
Below in conjunction with embodiment, the detailed description of the invention of the present invention is further described, the most therefore the present invention is limited System is among described scope of embodiments.In embodiment, cement uses normal silicate 42.5R cement；Coarse aggregate uses particle diameter It is 5～25mm continuous grading rubbles；Fine aggregate uses modulus of fineness to be 2.5～3.0 high-quality washing Machine-made Sands, and admixture uses excellent I grade of flyash of matter, breeze selection S95 level breeze, additive uses polycarboxylic acid retarding type pumping admixture, and water meets concrete-agitating Water supply standard.
Embodiment 1
P.O42.5R cement 310kg, 5～25mm continuous grading rubble 1110kg, washing mechanism is weighed respectively with weighing balance Sand 800kg, I grade of flyash 60kg of high-quality, breeze 45kg, mixing water 145kg, polycarboxylic acid retarding type pumping admixture 5.7kg, successively Rubble, river sand, cement, flyash and breeze being added in blender and stir, first additive must join coagulation simultaneously Soil mixing water in go mixing, then water and additive mixing liquid are joined in concrete mixer, be sufficiently stirred for 1～ After 2.5min, concrete mix draws off from blender, concrete tank transport job site, carry out follow-up substantially The construction of long-pending concrete.
After having constructed, its concrete surface is without cracking, and the comprcssive strength under bioassay standard curing condition, it the results are shown in Table 1。
Comparative example 1
Using the proportioning in patent CN103396060A, weighing balance weighs P.O42.5 cement 100kg respectively, and 5～31.5mm Continuous grading rubble 468kg, washes Machine-made Sand 342kg, II grade of flyash 23kg, breeze 15kg, mixing water 44kg, polycarboxylic acids Retardation setting type pumping admixture 0.8kg, will stir in rubble, river sand, cement, flyash addition blender successively, additive simultaneously First must join in concrete-agitating water and go mixing, then water and additive mixing liquid be joined concrete mixer In, after being sufficiently stirred for 1～2.5min, concrete mix draws off from blender, concrete tank transport job site, Carry out the construction of follow-up mass concrete.
After having constructed, its concrete surface is without cracking, and the comprcssive strength under bioassay standard curing condition, it the results are shown in Table 1。
Comparative example 2
Using the proportioning in patent CN103396060A, weighing balance weighs P.O42.5R cement 100kg respectively, 5～ 31.5mm continuous grading rubble 468kg, washing Machine-made Sand 342kg, II grade of flyash 23kg, breeze 15kg, mixing water 44kg, Polycarboxylic acid retarding type pumping admixture 0.8kg, will stir, simultaneously in rubble, river sand, cement, flyash addition blender successively First additive must join in concrete-agitating water and go mixing, then water and additive mixing liquid is joined concrete In blender, after being sufficiently stirred for 1～2.5min, concrete mix draws off from blender, concrete tank transport and execute Work is on-the-spot, carries out the construction of follow-up mass concrete.
After having constructed, owing to it uses early-strength 42.5 cement, early strength is high, and aquation is fast, and its contraction distortion is also big, Cause early concrete serious cracking, it is impossible to be applied in Practical Project.
Table 1

Claims (6)

1. utilize flyash and the anti-cracking large volume concrete of breeze dual mixing technology preparation, it is characterised in that by following weight portion Component make:
Wherein, described cement is P.O42.5R cement.
The anti-cracking large volume concrete utilizing flyash and the preparation of breeze dual mixing technology the most according to claim 1, it is special Levy and be: described rubble is particle diameter 5～25mm continuous grading rubble.
The anti-cracking large volume concrete utilizing flyash and the preparation of breeze dual mixing technology the most according to claim 1, it is special Levy and be: described Machine-made Sand is the washing Machine-made Sand of modulus of fineness 2.5～3.0.
The anti-cracking large volume concrete utilizing flyash and the preparation of breeze dual mixing technology the most according to claim 1, it is special Levy and be: described additive is at least one in water reducer, retarder, air entraining agent, defoamer, and the most described additive is for subtracting Water preparation.
The anti-cracking large volume concrete utilizing flyash and the preparation of breeze dual mixing technology the most according to claim 4, it is special Levy and be: described water reducer is at least one in poly carboxylic acid series water reducer, naphthalene water reducer, ligninsulfonate water reducer, more It is preferably poly carboxylic acid series water reducer.
The anti-cracking large volume concrete utilizing flyash and the preparation of breeze dual mixing technology the most according to claim 1, it is special Levy and be, be made up of the component of following weight portion:
CN201610273924.8A 2016-04-28 2016-04-28 Anti-crack mass concrete prepared by utilizing fly ash and mineral powder double-mixing technology Pending CN105948619A (en)

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Cited By (12)

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Publication number Priority date Publication date Assignee Title
CN108101425A (en) * 2016-11-24 2018-06-01 嘉兴市东锦混凝土有限公司 Concrete and preparation method thereof
CN108328994A (en) * 2018-03-29 2018-07-27 吉林重通成飞新材料股份公司 A kind of anti-crack concrete and preparation method thereof
CN108793887A (en) * 2018-07-26 2018-11-13 上海石化安东混凝土有限公司 A kind of mass concrete and preparation method thereof
CN108999405A (en) * 2018-07-25 2018-12-14 中水电第十工程局（郑州）有限公司 The construction method of severe cold area winter mass concrete
CN109095832A (en) * 2017-07-13 2018-12-28 中交武汉港湾工程设计研究院有限公司 A kind of high-performance volcanic ash machine-made sand concrete
CN109721311A (en) * 2019-03-08 2019-05-07 陕西恒盛混凝土有限公司 C45 mass concrete and its preparation process
CN109942261A (en) * 2017-12-21 2019-06-28 兴业县银基混凝土有限公司 A kind of self-compacting concrete
CN112500092A (en) * 2021-01-23 2021-03-16 惠州晖华混凝土有限公司 High-efficiency temperature-control artificial sand concrete and preparation method thereof
CN112979239A (en) * 2021-02-09 2021-06-18 武汉理工大学 High-strength anti-cracking mass concrete
CN113149549A (en) * 2021-03-31 2021-07-23 十九冶成都建设有限公司 Mass concrete and production method thereof
CN115259754A (en) * 2022-06-21 2022-11-01 贵州路桥集团有限公司 Anchorage mass concrete and construction process
CN117510145A (en) * 2023-09-26 2024-02-06 华东材料苏州有限公司 Environment-friendly fly ash and mineral powder double-doped concrete

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108101425A (en) * 2016-11-24 2018-06-01 嘉兴市东锦混凝土有限公司 Concrete and preparation method thereof
CN109095832A (en) * 2017-07-13 2018-12-28 中交武汉港湾工程设计研究院有限公司 A kind of high-performance volcanic ash machine-made sand concrete
CN109942261A (en) * 2017-12-21 2019-06-28 兴业县银基混凝土有限公司 A kind of self-compacting concrete
CN108328994A (en) * 2018-03-29 2018-07-27 吉林重通成飞新材料股份公司 A kind of anti-crack concrete and preparation method thereof
CN108999405A (en) * 2018-07-25 2018-12-14 中水电第十工程局（郑州）有限公司 The construction method of severe cold area winter mass concrete
CN108793887A (en) * 2018-07-26 2018-11-13 上海石化安东混凝土有限公司 A kind of mass concrete and preparation method thereof
CN108793887B (en) * 2018-07-26 2020-12-22 上海石化安东混凝土有限公司 Large-volume concrete and preparation method thereof
CN109721311A (en) * 2019-03-08 2019-05-07 陕西恒盛混凝土有限公司 C45 mass concrete and its preparation process
CN112500092A (en) * 2021-01-23 2021-03-16 惠州晖华混凝土有限公司 High-efficiency temperature-control artificial sand concrete and preparation method thereof
CN112979239A (en) * 2021-02-09 2021-06-18 武汉理工大学 High-strength anti-cracking mass concrete
CN113149549A (en) * 2021-03-31 2021-07-23 十九冶成都建设有限公司 Mass concrete and production method thereof
CN115259754A (en) * 2022-06-21 2022-11-01 贵州路桥集团有限公司 Anchorage mass concrete and construction process
CN117510145A (en) * 2023-09-26 2024-02-06 华东材料苏州有限公司 Environment-friendly fly ash and mineral powder double-doped concrete

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