CN1044362C - Series paper alkali alumite plumping agent - Google Patents

Series paper alkali alumite plumping agent Download PDF

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Publication number
CN1044362C
CN1044362C CN94120191A CN94120191A CN1044362C CN 1044362 C CN1044362 C CN 1044362C CN 94120191 A CN94120191 A CN 94120191A CN 94120191 A CN94120191 A CN 94120191A CN 1044362 C CN1044362 C CN 1044362C
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CN
China
Prior art keywords
alkali
type
slag
alunite
alum
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.)
Expired - Fee Related
Application number
CN94120191A
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Chinese (zh)
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CN1125701A (en
Inventor
金树青
沈熙佐
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Individual
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Priority to CN94120191A priority Critical patent/CN1044362C/en
Publication of CN1125701A publication Critical patent/CN1125701A/en
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Publication of CN1044362C publication Critical patent/CN1044362C/en
Anticipated expiration legal-status Critical
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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
    • 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
    • C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
    • C04B22/008—Cement and like inorganic materials added as expanding or shrinkage compensating ingredients in mortar or concrete compositions, the expansion being the result of a recrystallisation
    • 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
    • C04B2111/10—Compositions or ingredients thereof characterised by the absence or the very low content of a specific material
    • C04B2111/1025—Alkali-free or very low alkali-content materials
    • 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)
  • Inorganic Chemistry (AREA)
  • Processing Of Solid Wastes (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

The present invention relates to a serial low-alkali alunite expanding agent. Alum slag, coal ore, fly ash and slag are respectively and proportionally processed together with anhydrous gypsum or dihydrate gypsum, natural alunite, alum mud and calcined alunite through the operation of ball milling in a ball mill so as to obtain low-alkali alunite expanding agents in four types of type 1, type 2, type 3 and type 4. The present invention can be widely used for rigid waterproofing roofs, underground concrete waterproofing projects, airport runways, highways, etc., and has the advantages of low alkali content, preventable danger of alkali-aggregate reaction (AAR), low addition amount, long storage time and reduced project cost. Owing to the use of a large amount of industrial waste slag, the waste can be changed into valuables, the environmental pollution can be reduced, and large social benefits and economic benefits can be obtained.

Description

The low alkali alumite plumping agent of series
The present invention relates to a kind of cement additive, exactly is the low alkali alumite plumping agent of a kind of series.
China's research and development alumite plumping agent is applied to concrete (concrete) and the history in existing more than twenty year of mortar.The water proof of underground engineering, waterproof, antiseepage, leakproof, protection against the tide, anticracking etc. are played an important role.CN1037886A 88102924.8 is disclosed to be exactly a kind of in the alumite plumping agent.Producing this class swelling agent needs a large amount of valuable alunites, uses incorporation also big, generally between 10～15%, have in addition up to 20%, though do not influence the speed of concrete, increased the transportation and the warehousing burden of unit in charge of construction.The present in addition alumite plumping agent that uses, its alkalinity is 1.7～2.2%.The alkalinity height, incorporation is big, if used the basic active aggregate in the concrete.Having under the environment of water, potential AAR danger is then being arranged.
AAR is the abbreviation of alkali-aggregate reaction.Briefly be exactly that alkali in the cement works with the basic active material in the aggregate and causes concrete cracking.Since the forties, every two years hold an AAR meeting in the world, because AAR action system more complicated, detailed mechanism is not clear, so countries in the world are also inconsistent to the standard of alkalinity in the standard of alkalinity in the cement and the every cubic metre of concrete so far.But the alkalinity in the effort reduction cement is one of the approach of a prevention AAR danger this point has but obtained common recognition.This means that promptly the admixture that mixes in the cement also must reduce alkalinity alkalinity in the reduction cement.
The low alkali alumite plumping agent of series provided by the present invention is the kind that updates in the alumite plumping agent, is intended to prevent AAR harm to guarantee the safety of concrete.
Be milled to certain fineness in the ball mill endosphere after the present invention is prepared burden in proportion by industrial residue, dehydrated gyp-or dihydrate gypsum, natural alumstone, alum mud and four kinds of components of calcined alunite and promptly obtain product.
The weight percent of four kinds of components is as follows:
Industrial residue: 25～50%
Dehydrated gyp-or dihydrate gypsum: 30～50%
Natural alumstone: 5～20%
Alum mud and calcined alunite: 5～15%
Described industrial residue is any one in following four kinds:
Alum slag: refine the waste residue that alunite discharged by alumstone ore.
Coal gangue: the waste residue that the colliery abandons.
Flyash: the waste residue of fuel-burning power plant discharging.
Slag: being water-granulated slag again, is the waste residue of steelworks discharging.
Both use one described dehydrated gyp-or dihydrate gypsum (gypsum that promptly contains two crystal water), play expansion.Natural alumstone promptly is that exploitation obtains the alum ore, rises to expand and enhancement.
Described alum mud is sedimentary tankage when refining alum.Calcined alunite is the alum ore of natural alum ore after 600～750 ℃ of calcinings, rises to strengthen early strength function.
Just can process with other three kinds of components respectively with alum slag, coal gangue, flyash and four kinds of industrial residues of slag and to obtain the low alkali swelling agent of series, be called the I type with what the alum slag was processed, other are called II type, III type familial combined hyperlipidemia successively.
More than alkalinity and every physical performance index of four kinds of swelling agents see the following form
The material name claims Alkalinity % Fineness % Volume % Ultimate compression strength MPa Folding strength MPa Time of coagulation Confined expansion %
Initial set (h) Final set (h)
7d 28d 7d 28d
The I type 1.37 9.4 9 30.5 60 5.1 9 4.09 8.58 0.045
The II type 1.40 9 9 30.6 59 5.2 8.9 4.30 8.05 0.044
The III type 1.18 8.8 9 31 59 5.0 8.8 4.15 5.55 0.048
The IV type 1.09 8.8 9 31 81 5.2 8.5 3.30 6.50 0.045
Fineness is meant 0.08mm square hole sieve screen over-size in the table.Used cement is Chaohu 525 #Ordinary Portland cement.
This product fineness, ultimate compression strength, folding strength, time of coagulation, limited expansion rate all meet or exceed GB JC476-92 specification of quality.
Alkalinity of the present invention is low, can effectively prevent the harm of alkali-aggregate reaction, especially III type, two kinds of swelling agents of IV type, it contains alkali puts and reaches advanced world standards, and as the regulation to the cement alkalinity, Germany is 1.2%, Canada is 1.25%, and Japan is 1.2 ± 0.05%, and China is 1.2%.
Incorporation of the present invention is few, can reduce transportation and warehousing expense, reduces building cost.7～9% mix (the equivalent replacement cement) put by cement does not influence intensity, can compensate the contraction of concrete or mortar, improves antiseepage, anticracking, protection against the tide, the water resistance of concrete or mortar.Concrete or pound slurry to arrangement of reinforcement can also increase concrete or mortar self-stress value 0.2～0.7MFa, thereby avoid concrete or mortar because the crack that the temperature difference causes.The present invention can be used for concrete single ply roofing, concrete underground waterproof engineering, concrete airfield runway and motorway, concrete pond and water tower, concrete reinforcement, the grouting of machine foot screw, silo concrete ground and retaining wall, concrete last-cost joint etc.
Shelf lives of the present invention never degenerated more than 2 years.
In addition because the present invention has used a large amount of industrial residues, general add-on is many 25%, and this is not only turns waste into wealth, and has subtracted environmental pollution, accounts for the farmland less, has great economic and social benefit.
Embodiment
1, get 125 kilograms of alum slags, 200 kilograms of dehydrated gyp-s, 80 kilograms of natural alumstones, ball milling in 30 kilograms in the alum mud, 45 kilograms of input ball mills of calcined alunite makes fineness reach 0.08mm square hole sieve screen over-size and promptly gets 480 kilograms of I type swelling agents less than 10%.
2, get 200 kilograms of coal gangues, 210 kilograms of dihydrate gypsums, 25 kilograms of natural alumstones, 25 kilograms in alum mud, 50 kilograms of calcined alunites, processing obtains 510 kilograms of II type swelling agents with embodiment 1.
3, get 150 kilograms in flyash, 180 kilograms of dehydrated gyp-s, 60 kilograms of natural alumstones, 35 kilograms in alum mud, 25 kilograms of calcined alunites, processing obtains 440 kilograms of III type swelling agents with embodiment 1.
4, get 180 kilograms in slag, 200 kilograms of dihydrate gypsums, 100 kilograms of natural alumstones, 20 kilograms in alum mud, 20 kilograms of calcined alunites, processing obtains 520 kilograms of IV type swelling agents with embodiment 1.
Among the above embodiment, the chemical ingredients of various raw materials is seen attached list.
(1) alum slag
Title SiO 2Al 2O 3Fe 2O 3SO 3MgO CaO K 2O Na 2O
％ 45～55 20～30 1～3 1.5～5 0.2～0.8 1～1.5 1～2 0.2～0.8
(2) coal gangue
Title SiO 2Al 2O 3Fe 2O 3CaO MgO K 2O Na 2O SO 3
％ 40～50 20～25 1～2 5～8 1.0～2.5 0.1～0.25 1～2％
(3) flyash
Title SiO 2Al 2O 3Fe 2O 3CaO MgO K 2O Na 2O
％ 45～55 25～33 8～8 1～2 0.5～1.7 1～1.2 0.1～0.25
(4) slag
Title SiO 2Al 2O 3Fe 2O 3CaO MgO K 2O Na 2O
％ 35～40 7～12 2～4 40～45 3～8 0.4～0.8 0.3～0.5
(5) alum mud
Title SiO 2Al 2O 3Fe 2O 3MgO SO 2K 2O Na 2O
％ 30～35 30～40 1～2 0.03～0.05 15～25 3～4.5 0.2～0.3
(6) calcined alunite
Title SO 3Al 2O 3SiO 2Fe 2O 3MgO CaO K 2O Na 2O
％ 14～18 14～25 45～55 1～4 0.2～1.5 1～3 3.5～6 0.2～0.5
(7) natural alumstone
Title SiO 2Al 2O 3Fe 2O 3CaO MgO SO 3K 2O Na 2O
％ 45～50 10～22 2.5～3.5 1.5～2 0.2～0.8 14～18 3～4 0.7～0.9

Claims (1)

1, the low alkali alumite plumping agent of a kind of series is formed through ball milling by the same expanding material of industrial residue, strongthener and early strong material mixing, and it is characterized in that: the weight percent of each component is:
Industrial residue: 25～50%
Dehydrated gyp-or dihydrate gypsum: 30～50%
Natural alumstone: 5～20%
Alum mud and calcined alunite: 5～15%.
Described industrial residue is any in alum slag, coal gangue, flyash and the slag.
CN94120191A 1994-12-31 1994-12-31 Series paper alkali alumite plumping agent Expired - Fee Related CN1044362C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN94120191A CN1044362C (en) 1994-12-31 1994-12-31 Series paper alkali alumite plumping agent

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN94120191A CN1044362C (en) 1994-12-31 1994-12-31 Series paper alkali alumite plumping agent

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CN1125701A CN1125701A (en) 1996-07-03
CN1044362C true CN1044362C (en) 1999-07-28

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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1116242C (en) * 1998-12-31 2003-07-30 金树青 Low-base and low-dosage swelling agent for concrete
CN1332906C (en) * 2005-04-15 2007-08-22 湘潭建科工贸有限公司 Method for preparing expansion agent for composite type concrete
CN105271884A (en) * 2015-11-04 2016-01-27 江苏名和集团有限公司 Cement expansive material produced by using waste resources
CN108947295A (en) * 2018-09-12 2018-12-07 十堰市郧阳区成林工贸有限责任公司 Low-alkali concrete swelling agent and the preparation method and application thereof
CN114455904B (en) * 2022-01-10 2023-06-02 南京迈越材料科技有限公司 Shrinkage compensation composite material based on modified alunite tailings and preparation method thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1048535A (en) * 1989-07-03 1991-01-16 山东省莒南县水泥厂 Expansion self-stressed agent

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1048535A (en) * 1989-07-03 1991-01-16 山东省莒南县水泥厂 Expansion self-stressed agent

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
建材实用配方手册 1991.5.1 河海大学出版社，姚冶邦 *
建材实用配方手册 1991.5.1 河海大学出版社，姚冶邦;膨胀混凝土 1990.1.1 铁道出版社吴中伟 *
膨胀混凝土 1990.1.1 铁道出版社吴中伟 *

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