CN110407492A - A kind of modified superfine fly ash aggregate - Google Patents

A kind of modified superfine fly ash aggregate Download PDF

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Publication number
CN110407492A
CN110407492A CN201910772436.5A CN201910772436A CN110407492A CN 110407492 A CN110407492 A CN 110407492A CN 201910772436 A CN201910772436 A CN 201910772436A CN 110407492 A CN110407492 A CN 110407492A
Authority
CN
China
Prior art keywords
fly ash
surface area
specific surface
flyash
modified superfine
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
CN201910772436.5A
Other languages
Chinese (zh)
Inventor
孙健
谷向民
殷学宇
王敏
崔博
马金龙
吕新锋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shandong Lu Building Materials Co Ltd
Original Assignee
Shandong Lu Building Materials Co Ltd
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 Shandong Lu Building Materials Co Ltd filed Critical Shandong Lu Building Materials Co Ltd
Priority to CN201910772436.5A priority Critical patent/CN110407492A/en
Publication of CN110407492A publication Critical patent/CN110407492A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/0028—Aspects relating to the mixing step of the mortar preparation
    • C04B40/0039—Premixtures of ingredients
    • C04B40/0042—Powdery mixtures
    • 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)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

The present invention provides a kind of preparation method of modified superfine fly ash aggregate, specifically by metallurgical industry solid waste slag vertical-mill grinding to specific surface area > 450m2/ kg, then sorting obtains specific surface area > 650m2/kg super finely ground slag, by coal-burning power plant's Industrial Solid Waste coal ash ball milling mill > 450m2/ kg, then sorting obtains specific surface area > 750m2Super finely ground slag and superfined flyash are prepared cement or concrete admixture according to maximum 0.5:1 ratio is compound by the superfined flyash of/kg, and effect reaches S95 rank miberal powder.The preparation method advantage of modified superfine coal ash admixture provided by the invention is: can large-scale comprehensive utilize flyash, reduce the cost of concrete, because of the low generation for reducing concrete microcrack of its heat of hydration, Industrial Solid Waste resource enable to comprehensively utilize.

Description

A kind of modified superfine fly ash aggregate
Technical field
The invention belongs to building material technical fields, and in particular to a kind of preparation side of modified superfine fly ash aggregate Method.
Background technique
Flyash is the coal of coal-fired power plant after grinding and burning, the powder collected from coal-powder boiler flue gas, can be made For artificial pozzolanic activity material.It is more early to the research of flyash both at home and abroad, now to the technology ratio in relation to application flyash It is more, wherein application technology comparative maturity of the flyash as concrete admixture.China's steel and thermoelectricity production capacity occupy A large amount of slag and flyash are generated in the first in the world, cement and concrete yield ranking the first in the world, steel and thermoelectricity production, When these waste residues are used in the production of cement and concrete, it is only 20% left side that cement rate is replaced generally in concrete production The right side, utilization rate is lower, how to prepare the flyash of high effector function, improves volume of the flyash in cement, is that in-depth utilizes The R&D direction of flyash.Domestic status is that a large amount of flyash is discharged without any processing at present, is occupied cultivated land, dirty Contaminate water source, pollute environment, therefore thorough pollution administration makes flyash turn waste into wealth, be nature to it is proposed that severe class Topic, currently, what is be most widely used in the market is II grade of flyash, early activity is low, substitutes in concrete gel material Cement consumption restricts it significantly and efficiently utilizes generally 15% or so, it is therefore necessary to propose to improve.
Chinese patent CN106082753A discloses a kind of " superfine powder concrete admixture ".The superfine powder that the invention provides The raw material of concrete admixture forms and its mass percent is as follows: granulated blast-furnace slag micropowder 50%；Superfined flyash 40%；Alkali Property exciting agent 10%.Concrete early stage is significantly increased in the present invention and later strength, the heat of hydration for solving mass concrete are asked Topic, but the invention needs to add exciting agent can be only achieved effect.
Summary of the invention
In view of the foregoing deficiencies of prior art, the technical problem to be solved by the invention is to provide a kind of price is low Honest and clean, superior performance is suitble to prepare high-performance cement or the superfined flyash admixture of concrete and preparation method thereof.
In order to solve the above technical problems, the present invention has preparation content below and technique and product characteristic:
A kind of preparation method of modified superfine fly ash aggregate, the preparation method of the modified superfine fly ash aggregate include Preparation process below:
A. component design: the raw material composition and weight percent of modified superfine fly ash aggregate is determined are as follows:
Super finely ground slag 20-45%
Superfined flyash 55-80%
The super finely ground slag is the commercially available S95 slag powders for meeting GB/T18046-2017 national standard, by superfine classifier point Obtained super finely ground slag is selected, the key technical indexes is: density (g/cm3) >=2.8, specific surface area (m2/ kg) >=work in 650,7 days Sex index >=90%, 28 day activity index >=110%；
The superfined flyash is commercially available II grades of flyash for meeting GB/T1596-2017 national standard, is made by ball milling grinding Its specific surface area >=450 m2/ kg, the superfined flyash sorted using superfine classifier, the key technical indexes is: Density (g/cm3)≤2.6, specific surface area (m2/ kg) >=750,7 days activity index >=85%, 28 day activity index >=95%.
B. ingredient and hybrid technique are weighed: carrying out weighing ingredient by above-mentioned raw materials formula, then puts above two raw material Enter in mixing machine and is uniformly mixed through mechanical stirring up to modified superfine fly ash aggregate.
As described above, the preparation method of modified superfine fly ash aggregate provided by the invention, has the advantages that
1, modified superfined flyash admixture, its most prominent advantage are that overcome 3 days early strengths of S95 grade slag powder low The shortcomings that, and 7 days and 28 days activity indexs >=S95 grade slag powder.
2, modified superfined flyash admixture, because of the low generation for reducing concrete microcrack of its heat of hydration.
3, modified superfined flyash admixture, because its large-scale comprehensive utilize flyash, reduce concrete at This, because of the low generation for reducing concrete microcrack of its heat of hydration, enables Industrial Solid Waste resource to comprehensively utilize.
Specific 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 is understood other advantages and efficacy of the present invention easily.
Embodiment 1
To prepare sample 450g as in terms of 100%:
A. Shandong building materials Co., Ltd S95 slag powders are taken, then sort to obtain super finely ground slag 20% by superfine classifier；It is close Spend 2.88g/cm3, specific surface area 700m2/kg；
B. II grades of flyash of Shandong power plant are taken, make its specific surface area >=450 m by ball milling grinding2/ kg, using ultra-fine point Grade machine sorts to obtain superfined flyash 80%；Density 2.55g/cm3, specific surface area 800m2/kg；
Above two component is just become into modified superfine fly ash aggregate sample after evenly mixing.It " is used by GB/T18046-2017 Ground granulated blast furnace slag in cement, mortar and concrete " national standard, examine modified superfine fly ash aggregate sample strong Degree.Reference cement selects 52.5 grades of portland cements of conch board.Test result is shown in Table 1.
Table 1: the intensity and activity index testing result of modified superfine fly ash aggregate
Embodiment 2
To prepare sample 450g as in terms of 100%:
A. Shandong building materials Co., Ltd S95 slag powders are taken, then sort to obtain super finely ground slag 30% by superfine classifier；It is close Spend 2.88g/cm3, specific surface area 700m2/kg；
B. II grades of flyash of Shandong power plant are taken, make its specific surface area >=450 m by ball milling grinding2/ kg, using ultra-fine point Grade machine sorts to obtain superfined flyash 70%；Density 2.55g/cm3, specific surface area 800m2/kg；
Above two component is just become into modified superfine fly ash aggregate sample after evenly mixing.It " is used by GB/T18046-2017 Ground granulated blast furnace slag in cement, mortar and concrete " national standard, examine modified superfine fly ash aggregate sample strong Degree.Reference cement selects 52.5 grades of portland cements of conch board.Test result is shown in Table 2.
Table 2: the intensity and activity index testing result of modified superfine fly ash aggregate
Embodiment 3
To prepare sample 450g as in terms of 100%:
A. Shandong building materials Co., Ltd S95 slag powders are taken, then sort to obtain super finely ground slag 40% by superfine classifier；It is close Spend 2.88g/cm3, specific surface area 700m2/kg；
B. II grades of flyash of Shandong power plant are taken, make its specific surface area >=450 m by ball milling grinding2/ kg, using ultra-fine point Grade machine sorts to obtain superfined flyash 60%；Density 2.55g/cm3, specific surface area 800m2/kg；
Above two component is just become into modified superfine fly ash aggregate sample after evenly mixing.It " is used by GB/T18046-2017 Ground granulated blast furnace slag in cement, mortar and concrete " national standard, examine modified superfine fly ash aggregate sample strong Degree.Reference cement selects 52.5 grades of portland cements of conch board.Test result is shown in Table 3.
Table 3: the intensity and activity index testing result of modified superfine fly ash aggregate
The specific surface area of modified superfine fly ash aggregate >=750 m2/ kg, density >=2.65 g/cm3, metal Ferrum content≤ 0.3%, SO3Content≤4.0%, density≤2.80 g/cm3, Lei Shi method stability≤3.0mm, free calcium oxide content≤3.0%, Content of magnesia≤5.0%.
3 days strength activity index are referring to GB/T18046-2017 " for the granulated blast-furnace mine in cement, mortar and concrete Ground-slag " specified in method examine.
3 days activity indexs of modified superfine fly ash aggregate are between (60-75) %, and 7 days activity indexs are in (80-90) % Between, 28 days activity indexs are between (95-105) %.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe The personage for knowing this technology all without departing from the spirit and scope of the present invention, carries out modifications and changes to above-described embodiment.Cause This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as At all equivalent modifications or change, should be covered by the claims of the present invention.

Claims (1)

1. a kind of preparation method of modified superfine fly ash aggregate, it is characterised in that the modified superfine fly ash aggregate Preparation method includes preparation process below:
A. component design: the raw material composition and weight percent of modified superfine fly ash aggregate is determined are as follows:
Super finely ground slag 20-45%
Superfined flyash 55-80%
The super finely ground slag is the commercially available S95 slag powders for meeting GB/T18046-2017 national standard, by superfine classifier point Obtained super finely ground slag is selected, the key technical indexes is: density (g/cm3) >=2.8, specific surface area (m2/ kg) >=work in 650,7 days Sex index >=90%, 28 day activity index >=110%；
The superfined flyash is commercially available II grades of flyash for meeting GB/T1596-2017 national standard, is made by ball milling grinding Its specific surface area >=450 m2/ kg, the superfined flyash sorted using superfine classifier, the key technical indexes is: Density (g/cm3)≤2.6, specific surface area (m2/ kg) >=750,7 days activity index >=85%, 28 day activity index >=95%；
B. ingredient and hybrid technique are weighed: carrying out weighing ingredient by above-mentioned raw materials formula, is then put into above two raw material mixed It is uniformly mixed in conjunction machine through mechanical stirring up to modified superfine fly ash aggregate.
CN201910772436.5A 2019-08-21 2019-08-21 A kind of modified superfine fly ash aggregate Pending CN110407492A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115466070A (en) * 2022-11-02 2022-12-13 唐山学院 Ultra-low carbon silicon-rich mineral admixture for high-performance concrete and preparation method thereof
CN115490449A (en) * 2022-10-07 2022-12-20 江苏金木土科技有限公司 Preparation method of superfine mineral admixture
CN116040974A (en) * 2023-03-20 2023-05-02 解婧秋 Method for preparing superfine powder cement admixture

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101367631A (en) * 2008-09-27 2009-02-18 天津水泥工业设计研究院有限公司 Ultra-fine coal ash based composite mineral blending material and manufacturing method thereof
CN101805142A (en) * 2010-04-20 2010-08-18 上海大学 Preparation method of modified S95-grade slag powder
CN103265196A (en) * 2013-05-31 2013-08-28 神华集团有限责任公司 Mineral admixture as well as preparation method and application thereof
CN103964712A (en) * 2013-01-24 2014-08-06 王诗友 Ultra-fine powder cement admixture and manufacturing method thereof
EP2970003A1 (en) * 2013-03-14 2016-01-20 The Catholic University Of America High-strength geopolymer composite cellular concrete
CN107200494A (en) * 2017-05-18 2017-09-26 新疆北新路桥集团股份有限公司 A kind of coal ash, slag sorting processing method and super fine powder additives
CN107814503A (en) * 2017-10-26 2018-03-20 贵州中建建筑科研设计院有限公司 A kind of spacetabs type complex mineral blending material

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101367631A (en) * 2008-09-27 2009-02-18 天津水泥工业设计研究院有限公司 Ultra-fine coal ash based composite mineral blending material and manufacturing method thereof
CN101805142A (en) * 2010-04-20 2010-08-18 上海大学 Preparation method of modified S95-grade slag powder
CN103964712A (en) * 2013-01-24 2014-08-06 王诗友 Ultra-fine powder cement admixture and manufacturing method thereof
EP2970003A1 (en) * 2013-03-14 2016-01-20 The Catholic University Of America High-strength geopolymer composite cellular concrete
CN103265196A (en) * 2013-05-31 2013-08-28 神华集团有限责任公司 Mineral admixture as well as preparation method and application thereof
CN107200494A (en) * 2017-05-18 2017-09-26 新疆北新路桥集团股份有限公司 A kind of coal ash, slag sorting processing method and super fine powder additives
CN107814503A (en) * 2017-10-26 2018-03-20 贵州中建建筑科研设计院有限公司 A kind of spacetabs type complex mineral blending material

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
施惠生 等: "超细粉煤灰复合掺合料研究", 《粉煤灰》 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115490449A (en) * 2022-10-07 2022-12-20 江苏金木土科技有限公司 Preparation method of superfine mineral admixture
CN115466070A (en) * 2022-11-02 2022-12-13 唐山学院 Ultra-low carbon silicon-rich mineral admixture for high-performance concrete and preparation method thereof
CN116040974A (en) * 2023-03-20 2023-05-02 解婧秋 Method for preparing superfine powder cement admixture

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Application publication date: 20191105