CN1868954A - Composite gelling material and its preparation method - Google Patents

Composite gelling material and its preparation method Download PDF

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Publication number
CN1868954A
CN1868954A CNA200610019244XA CN200610019244A CN1868954A CN 1868954 A CN1868954 A CN 1868954A CN A200610019244X A CNA200610019244X A CN A200610019244XA CN 200610019244 A CN200610019244 A CN 200610019244A CN 1868954 A CN1868954 A CN 1868954A
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CN
China
Prior art keywords
cement stone
blast
furnace slag
surface area
specific surface
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Application number
CNA200610019244XA
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Chinese (zh)
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CN100391881C (en
Inventor
胡曙光
何永佳
吕林女
丁庆军
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Wuhan University of Technology WUT
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Wuhan University of Technology WUT
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Priority to CNB200610019244XA priority Critical patent/CN100391881C/en
Publication of CN1868954A publication Critical patent/CN1868954A/en
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Publication of CN100391881C publication Critical patent/CN100391881C/en
Expired - Fee Related 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
    • C04B7/00—Hydraulic cements
    • C04B7/24—Cements from oil shales, residues or waste other than slag
    • C04B7/246—Cements from oil shales, residues or waste other than slag from waste building materials, e.g. waste asbestos-cement products, demolition waste
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
    • 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

A composite cementing material is prepared from the calcined cement-stone powder (50-70 Wt%) and the slag of blast furnace (30-50 Wt%). Said calcined cement-stone powder is prepared from the waste concrete through separating cement-stone, calcining at 600-800 deg.C grinding.

Description

A kind of composite gelled material and preparation method thereof
Technical field
The invention belongs to building material field, be specifically related to a kind of composite gelled material and preparation method thereof.
Background technology
The tradition Cement industry is the industry that the energy, resource consumption are huge and carrying capacity of environment is serious, and the complementary gelling material of development of new reduces cement output to a certain extent, reduces the energy, resource consumption and carrying capacity of environment and has crucial meaning.Meanwhile, the a large amount of industrial residue of the annual generation of industries such as metallurgy, electric power, the stacking of these waste residues takies the land resources of a large amount of preciousnesses, easily environment is produced secondary pollution simultaneously, and annual by the surprising discarded concrete of reasons such as old building, engineering structure dismounting generation quantity, throwing aside of these discarded concretes stacked same existence waste land resources, caused environmental pollution problems.Industrial residues such as slag successfully have been applied to as adulterant in the middle of the cement concrete, the Ca (OH) that relies on the cement clinker mineral aquation to be produced 2With them pozzolanic reaction taking place, excite its activity, generates hydrated product such as CSH gel and form gelling ability.For the recycling of discarded concrete, mainly concentrate at present and reclaim coarse aggregate and prepare regenerated aggregate concrete, wherein cement stone component is in the state that does not utilize basically.
Summary of the invention
The object of the present invention is to provide a kind of with low cost, composite gelled material that recovery and reuse of waste is high and preparation method thereof.
To achieve these goals, technical scheme of the present invention is: a kind of composite gelled material, it is characterized in that it mainly is prepared from by calcine cement stone flour and blast-furnace slag, the shared weight percent of each raw material is: calcine cement stone flour 50-70, blast-furnace slag 30-50; Described calcine cement stone flour is calcined 600 ℃ of-800 ℃ of temperature ranges for the cement stone of separating from discarded concrete, and calcination time is 1-2 hour, and grinding is to specific surface area 300-400m again 2/ kg; The specific surface area 450-500m of described blast-furnace slag 2/ kg.
Its activity index of described blast-furnace slag is measured by standard GB/T18046-2000, and 7 days activity indexs are not less than 75%, 28 day activity index and are not less than 95%.
The preparation method of above-mentioned a kind of composite gelled material is characterized in that it comprises the steps:
1), the preparation of calcine cement stone flour: the cement stone that will separate from discarded concrete is calcined 600 ℃ of-800 ℃ of temperature ranges, and calcination time is 1-2 hour, and grinding is to specific surface area 300-400m again 2/ kg;
2), blast-furnace slag is milled to specific surface area 450-500m 2/ kg;
3), be: calcine cement stone flour 50-70, blast-furnace slag 30-50 by the shared weight percent of each raw material; Choose calcine cement stone flour and blast-furnace slag mix product.
Cement stone in the discarded concrete separated after calcine under the certain temperature, be on good terms once more aquation and form gelling ability of the dehydration of acquisition is referred to as regenerative gel material; But exist in a large number by Ca (OH) owing to take off aqueous phase 2The high reactivity f-CaO that produces with the CSH gel decomposition has disadvantageous effect to the serviceability and the endurance quality of regenerative gel material.
The present invention adopts cement stone to calcine 600 ℃ of-800 ℃ of temperature ranges, by Ca (OH) 2Produce a large amount of high reactivities, the f-CaO of polymolecularity with the CSH gel decomposition, generate Ca (OH) with the cement clinker mineral aquation 2The process difference, these f-CaO be that fast hydration generates Ca (OH) after water contacts 2, in composite gelled material, the early stage Ca (OH) that produces fast of aquation 2Promptly the levigated blast-furnace slag is had the intensive excitation, generate hydrated products such as CSH gel with their generation pozzolanic reactions.Meanwhile, imperfect crystal β-C that the thermolysis of CSH gel produces in the cement stone 2S and aluminium is the C that produces of material thermolysis mutually 12A 7All has great hydration and hardening ability Deng material, their hydrated product and levigate blast-furnace slag and Ca (OH) 2Between hydrated product that pozzolanic reaction produced intersect adhesion mutually, form spatial network, strengthen gelling ability.When composite gelled material has solved the dehydration of independent use cement stone dust on the one hand as gelling material by serviceability and endurance quality problem that f-CaO brought; Its gelling ability is better than merely and excites the formed gelling ability of levigate blast-furnace slag with lime on the other hand; Moreover the composite gelled material starting material are solid waste, have the useless advantage of with low cost, energy-conservation profit.
Composite gelled material of the present invention can prepare the cement-based material of low strength grade used as agglutination material, perhaps as concrete admixture.
Embodiment
Embodiment 1:
With the cement stone separated in the discarded concrete (former strength grade is C50) 700 ℃ of calcinings 1.5 hours down, again with its grinding to specific surface area 400m 2/ kg is it and specific surface area 450m 2The levigate ground granulated blast furnace slag of/kg mixed by weight 2: 1, and stirred with mixer, made composite gelled material A, use this composite gelled material as agglutination material, prepared the concrete of low strength grade, concrete mix is shown in Table 1, and the concrete performance of preparation is shown in Table 2:
Table 1 concrete mix (kg/m 3)
Water Composite gelled material A Sand Stone Water reducer
180 450 720 1080 2.7
Wherein:
Water: drinking public water supply
Sand: river sand, fineness modulus 2.6
Stone: Wingdale rubble, 5-25cm continuous grading
High efficiency water reducing agent: polycarboxylic acid series high efficiency water reducing agent, solid content are 35%
Table 2 concrete performance (kg/m 3)
Ultimate compression strength (MPa) The slump (mm)
3d 7d 28d 0h 1h
17.2 22.7 36.8 152 83
Embodiment 2:
With the cement stone separated in the discarded concrete (former strength grade is C50) 750 ℃ of calcinings 1 hour down, again with its grinding to specific surface area 350m 2/ kg is it and specific surface area 450m 2The levigate ground granulated blast furnace slag of/kg mixed by weight 1: 1, and stirred with mixer, made composite gelled material B, use this composite gelled material as adulterant, be used to prepare concrete, concrete mix is shown in Table 3, and the concrete performance of preparation is shown in Table 4:
Table 3 concrete mix (kg/m 3)
Water Cement Composite gelled material B Sand Stone Water reducer
180 315 135 720 1080 2.7
Wherein:
Water: drinking public water supply
Sand: river sand, fineness modulus 2.6
Stone: Wingdale rubble, 5-25cm continuous grading
High efficiency water reducing agent: polycarboxylic acid series high efficiency water reducing agent, solid content are 35%
Table 4 concrete performance (kg/m 3)
Ultimate compression strength (MPa) The slump (mm)
3d 7d 28d 0h 1h
40.2 46.1 58.9 218 183
Embodiment 3:
1, the cement stone of from discarded concrete, separating:
1), the bulk discarded concrete that will remove impurity such as reinforcing bar, wooden unit is broken into the fritter of 10cm-30cm size with jaw crusher, and then become the 3cm-10cm size particles with bevel-type eccentrically weighted shaft crusher in crushing, to be difficult to irony impurity such as manual sorting's tiny reinforcing bar and iron nail with the electromagnetism magnetic separator de-ironing and remove, material particles;
2), material particles is heated to 250 ℃-350 ℃ with vertical oil oven, make it be chilled to normal temperature with wind-force again;
3), cooled material is sent in the middle of the ball mill, between the material particles, between material particles and the steel ball mutually under collision, the rubbing effect, make to adhere to mortar and coarse aggregate is separated from each other, material residence time in ball mill is 3-10min; Material goes out the mill back and with the 5mm vibratory screening apparatus isolating mortar particulate and coarse aggregate is separated from each other out;
4), the mortar particulate of separating is sent into wind again sweep and carry out grinding in the tuber grinder, the residence time is 5-15min in wind is swept tuber grinder; Mortar particulate quartz sand fine aggregate and cement stone under grinding are separated from each other, and cement stone is ground to form fine powder, and under wind effect, cement stone fine powder is discharged with the wind, collect with bag filter, cement stone dust; Quartz sand (being fine aggregate) is then discharged from the mill tail, realizes the separation between fine aggregate and the cement stone.
2, a kind of preparation of composite gelled material, it comprises the steps:
1), the preparation of calcine cement stone flour: the cement stone that will separate from discarded concrete is calcined 600 ℃ of temperature ranges, and calcination time is 2 hours, and grinding is to specific surface area 300m again 2/ kg;
2), blast-furnace slag is milled to specific surface area 450m 2/ kg;
3), be: calcine cement stone flour 60, blast-furnace slag 40 by the shared weight percent of each raw material; Both are mixed make composite gelled material C, use this composite gelled material as agglutination material, prepared the concrete of low strength grade, concrete mix is shown in Table 5, and the concrete performance of preparation is shown in Table 6:
Table 5 concrete mix (kg/m 3)
Water Composite gelled material C Sand Stone Water reducer
180 450 720 1080 2.7
Wherein:
Water: drinking public water supply
Sand: river sand, fineness modulus 2.6
Stone: Wingdale rubble, 5-25cm continuous grading
High efficiency water reducing agent: polycarboxylic acid series high efficiency water reducing agent, solid content are 35%
Table 6 concrete performance (kg/m 3)
Ultimate compression strength (MPa) The slump (mm)
3d 7d 28d 0h 1h
15.8 19.7 32.5 164 93
Embodiment 4:
A kind of preparation of composite gelled material, it comprises the steps:
1), the preparation of calcine cement stone flour: the cement stone that will separate from discarded concrete is calcined 800 ℃ of temperature ranges, and calcination time is 1 hour, and grinding is to specific surface area 400m again 2/ kg;
2), ground granulated blast furnace slag is milled to specific surface area 500m 2/ kg;
3), be: calcine cement stone flour 70, blast-furnace slag 30 by the shared weight percent of each raw material; Choose calcine cement stone flour and blast-furnace slag and mix and make composite gelled material D, use this composite gelled material as adulterant, be used to prepare concrete, concrete mix is shown in Table 7, and the concrete performance of preparation is shown in Table 8:
Table 7 concrete mix (kg/m 3)
Water Cement Composite gelled material D Sand Stone Water reducer
180 315 135 720 1080 2.7
Wherein:
Water: drinking public water supply
Sand: river sand, fineness modulus 2.6
Stone: Wingdale rubble, 5-25cm continuous grading
High efficiency water reducing agent: polycarboxylic acid series high efficiency water reducing agent, solid content are 35%
Table 8 concrete performance (kg/m 3)
Ultimate compression strength (MPa) The slump (mm)
3d 7d 28d 0h 1h
43.5 46.3 57.2 196 143
。

Claims (3)

1. a composite gelled material is characterized in that it mainly is prepared from by calcine cement stone flour and blast-furnace slag, and the shared weight percent of each raw material is: calcine cement stone flour 50-70, blast-furnace slag 30-50; Described calcine cement stone flour is calcined 600 ℃ of-800 ℃ of temperature ranges for the cement stone of separating from discarded concrete, and calcination time is 1-2 hour, and grinding is to specific surface area 300-400m again 2/ kg; The specific surface area 450-500m of described blast-furnace slag 2/ kg.
2. a kind of composite gelled material according to claim 1 is characterized in that: its activity index of described blast-furnace slag is measured by standard GB/T18046-2000, and 7 days activity indexs are not less than 75%, 28 day activity index and are not less than 95%.
3. the preparation method of a kind of composite gelled material as claimed in claim 1 is characterized in that it comprises the steps:
1), the preparation of calcine cement stone flour: the cement stone that will separate from discarded concrete is calcined 600 ℃ of-800 ℃ of temperature ranges, and calcination time is 1-2 hour, and grinding is to specific surface area 300-400m again 2/ kg;
2), blast-furnace slag is milled to specific surface area 450-500m 2/ kg;
3), be: calcine cement stone flour 50-70, blast-furnace slag 30-50 by the shared weight percent of each raw material; Choose calcine cement stone flour and blast-furnace slag mix product.
CNB200610019244XA 2006-06-01 2006-06-01 Composite gelling material and its preparation method Expired - Fee Related CN100391881C (en)

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Cited By (11)

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CN101353245B (en) * 2008-09-18 2012-07-25 北京科技大学 Waste stone dust-containing high performance superfine sand concrete gel material and use method thereof
CN103396020A (en) * 2013-08-13 2013-11-20 尹无忌 Method for using waste concrete as active admixture in cement production
CN103803830A (en) * 2014-01-21 2014-05-21 北京奥润开元环保科技研究院有限公司 Activation treatment method of renewable powder
CN106220009A (en) * 2016-08-16 2016-12-14 仇颖莹 A kind of preparation method of high-specific surface area chamotte powder
CN106904848A (en) * 2017-04-01 2017-06-30 盐城工学院 The method and its product of easy fired belite calcium sulphoaluminate sulphur calcium silicate cement
CN106904847A (en) * 2017-04-12 2017-06-30 中国矿业大学 A kind of method that utilization discarded concrete Behavior of Hardened Cement Paste mutually prepares low fever's complex cement
CN106966617A (en) * 2017-04-01 2017-07-21 盐城工学院 The method of easy fired belite aluminium sulfate sulphur ferrous aluminate sulphur calcium silicate cement clinker
CN111205003A (en) * 2020-01-19 2020-05-29 武汉理工大学 Preparation method of regenerated cementing material
CN111848035A (en) * 2020-07-20 2020-10-30 中建西部建设新材料科技有限公司 Grouting material for connecting reinforcing steel bar sleeve and preparation method and application thereof
CN112079583A (en) * 2020-08-26 2020-12-15 武汉理工大学 Building material product based on rapid carbonization of regenerated cementing material and preparation method thereof
CN112934420A (en) * 2019-10-12 2021-06-11 曾彩霞 Gunny pulp biological fiber blasting crushing centrifuge and blasting method

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JPS5560047A (en) * 1978-10-27 1980-05-06 Nippon Steel Corp Inorganic binder
JPS61238398A (en) * 1985-04-17 1986-10-23 Nippon Jiryoku Senko Kk Preparation of submerged sludge curing material
CN1159248C (en) * 2001-02-14 2004-07-28 胡新杰 Composite cementing material of slag and steel slag
CN1344696A (en) * 2001-10-30 2002-04-17 中国石油大港油田油气勘探开发技术研究中心工艺所 Selectively penetrant cement stone
CN1186134C (en) * 2003-07-08 2005-01-26 王健 Method for treating inorganic solid waste and application
CN1260158C (en) * 2004-11-09 2006-06-21 张立省 New type of ecological cement and its prepn and application

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101353245B (en) * 2008-09-18 2012-07-25 北京科技大学 Waste stone dust-containing high performance superfine sand concrete gel material and use method thereof
CN103396020A (en) * 2013-08-13 2013-11-20 尹无忌 Method for using waste concrete as active admixture in cement production
CN103803830A (en) * 2014-01-21 2014-05-21 北京奥润开元环保科技研究院有限公司 Activation treatment method of renewable powder
CN106220009A (en) * 2016-08-16 2016-12-14 仇颖莹 A kind of preparation method of high-specific surface area chamotte powder
CN106966617A (en) * 2017-04-01 2017-07-21 盐城工学院 The method of easy fired belite aluminium sulfate sulphur ferrous aluminate sulphur calcium silicate cement clinker
CN106904848A (en) * 2017-04-01 2017-06-30 盐城工学院 The method and its product of easy fired belite calcium sulphoaluminate sulphur calcium silicate cement
CN106904848B (en) * 2017-04-01 2019-04-19 盐城工学院 The method and its product of easy fired belite-calcium sulphoaluminate-sulphur calcium silicate cement
CN106966617B (en) * 2017-04-01 2019-04-19 盐城工学院 Easy fired belite-aluminium sulfate-sulphur ferrous aluminate-sulphur calcium silicate cement clinker method
CN106904847A (en) * 2017-04-12 2017-06-30 中国矿业大学 A kind of method that utilization discarded concrete Behavior of Hardened Cement Paste mutually prepares low fever's complex cement
CN112934420A (en) * 2019-10-12 2021-06-11 曾彩霞 Gunny pulp biological fiber blasting crushing centrifuge and blasting method
CN112934420B (en) * 2019-10-12 2023-01-03 曾彩霞 Gunny pulp biological fiber blasting crushing centrifuge and blasting method
CN111205003A (en) * 2020-01-19 2020-05-29 武汉理工大学 Preparation method of regenerated cementing material
CN111848035A (en) * 2020-07-20 2020-10-30 中建西部建设新材料科技有限公司 Grouting material for connecting reinforcing steel bar sleeve and preparation method and application thereof
CN112079583A (en) * 2020-08-26 2020-12-15 武汉理工大学 Building material product based on rapid carbonization of regenerated cementing material and preparation method thereof

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