CN107352928A - Red-mud coal ash high-strength heat preservation building block based on alkali-activated carbonatite and preparation method thereof - Google Patents

Red-mud coal ash high-strength heat preservation building block based on alkali-activated carbonatite and preparation method thereof Download PDF

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Publication number
CN107352928A
CN107352928A CN201710587993.0A CN201710587993A CN107352928A CN 107352928 A CN107352928 A CN 107352928A CN 201710587993 A CN201710587993 A CN 201710587993A CN 107352928 A CN107352928 A CN 107352928A
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China
Prior art keywords
flyash
red mud
building block
alkali
heat preservation
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CN201710587993.0A
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CN107352928B (en
Inventor
张玉
马钢
王占锋
李珠
马昌明
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Hunan Yunzhong Renewable Technology Co ltd
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Taiyuan University of Technology
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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
    • C04B28/10—Lime cements or magnesium oxide 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
    • 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
    • C04B18/02—Agglomerated materials, e.g. artificial aggregates
    • C04B18/023—Fired or melted 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
    • 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
    • C04B18/0409—Waste from the purification of bauxite, e.g. red mud
    • 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
    • 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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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Civil Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

The invention discloses a kind of red-mud coal ash high-strength heat preservation building block based on alkali-activated carbonatite, and using industrial waste flyash, red mud as primary raw material, cement, quick lime are as auxiliary material, and flyash ceramic sand or shale pottery are as insulation material.Its mass percent composition is red mud 18% 40%, flyash 18% 30%, pottery sand 25% 40%, cement 3% 8%, lime 3% 10%, stalk fibre 1% 3%, early strength agent 0.5% 2%, moisture content 10% 15%, 8 36h is aged, using 40MPa pressure formings；It is made by drying, grinding, weighing, dispensing mixing and extrusion forming, standard curing and natural curing technique；The present invention has that moulding process is simple, and normal temperature fast reaction solidification, the advantages of non-sintered, non-evaporating pressure, its product compression strength is high, dry shrinkage resistance is strong, anti-permeability performance is good, and long-term place occurs without scum phenomenon.The present invention can largely utilize industrial waste, save the energy and resource, and cost is low, and energy consumption is small.

Description

Red mud based on alkali-activated carbonatite-flyash high-strength heat preservation building block and preparation method thereof
Technical field
The invention belongs to construction material walling unit field, and it is high-strength to refer specifically to a kind of red mud-flyash based on alkali-activated carbonatite Insulation blocks and preparation method thereof.
Background technology
Flyash is large industrial residue of thermal power generation discharge, and about 200,000,000 tons of flyash of China's year discharge, China directly uses Reach billions of members in the year cost of treated coal ash.With increasingly being furtherd investigate to flyash, people just progressively recognize powder Coal ash is no longer a kind of industrial residue, but a kind of available resource.Flyash is mainly used in backfilling and built the road, for building Build material also can only a small amount of replacing partial cement, the flyash for only accounting for total amount 20% or so is used for construction material, compared to other works Industry waste residue, the utilization rate of flyash and utilization be not horizontal high.Red mud is that one in aluminum oxide production process is refined with bauxite The useless mud of kind insoluble residue, 1 ton of aluminum oxide 1 ~ 2 ton of red mud of discharge is often produced, domestic red mud quantum of output is more than 3,500,000 tons/year.At present Red mud is mostly transported to stockyard by domestic and international alumina producer, wet method of building a dam stockpiling, and the method easily makes near a large amount of spent lyes penetrate into In soil, alkalization of soils is caused.On the other hand, clay brick plays as widely used construction material in production and life Important function.Although various New Building Materials continue to bring out in recent years, clay brick is still the main wall in China at present Material.The development of clay brick largely using damage cultivable soil, consumption non-renewable energy resources and pollution environment as Cost.It is estimated that in the late six decades, because fired clay brick damages 170,000 hectares of arable land, consume coal 7000 in fired clay brick year Ten thousand tons, SO is accompanied by addition2And CO2Etc. the discharge of a large amount of dusty gas.
The content of the invention
The present invention is directed to the existing deficiency that technology be present, and main purpose is to provide a kind of red mud-fine coal based on alkali-activated carbonatite Grey high-strength heat preservation building block and preparation method thereof, have moulding process simple, normal temperature fast reaction solidifies, non-sintered, non-evaporating pressure Advantage, its product compression strength is high, dry shrinkage resistance is strong, anti-permeability performance is good, and long-term place occurs without scum phenomenon；Can also be a large amount of Using industrial waste, the energy and resource are saved, cost is low, and energy consumption is small.
To achieve the above object, the present invention adopts the following technical scheme that：
A kind of red mud based on alkali-activated carbonatite-flyash high-strength heat preservation building block, using industrial waste flyash, red mud as primary raw material, Cement, quick lime are as auxiliary material, and flyash ceramic sand or shale pottery are as insulation material.Its mass percent forms：Red mud 18%-40%, flyash 18%-30%, pottery sand 25%-40%, cement 3%-8%, lime 3%-10%, stalk fibre 1%-3%, early strength agent 0.5%-2%, moisture content 10%-15%；By drying, grinding, weighing, dispensing mixing and 40MPa extrusion forming, standard curing and from Right maintaining process is made；Specific method process is as follows：
（1）, stoving process：Red mud, flyash and pottery sand are dried with dryer, remove free moisture therein；
（2）, grinding process：Weighing dispensing is carried out to mud, flyash and pottery sand by composition of raw materials, these three dispensings are put into ball milling Grinding to specific surface area is carried out in machine and is more than 600m2/kg；Its proportioning is red mud 18%-40%, flyash 18%-30%, pottery sand 25%- 40%；
（3）, raw material proportioning and ageing：Red mud 18%-40%, flyash 18%-30%, pottery sand 25%-40%, cement 3%-8%, lime 3%-10%, stalk fibre 1%-3%, early strength agent 0.5%-2%, water account for the 10%-15% of total mass ratio；Put all raw materials into mixer In be thoroughly mixed, be aged 8-36h under 10-15 DEG C of room temperature environment；
（4）, extrusion forming：Mix is poured into the mold, is molded under the effect of 40MPa forcing presses；
（5）, natural curing：Compressing building block is taken out, is transported to maintenance place natural curing.
Wherein, red mud is industrial residue caused by aluminium industry extraction aluminum oxide, and drying is crushed to its particle diameter and is less than 0.15mm。
Flyash is flyash of the gangue through being collected when broken, milling, Super-fine grinder powder, high temperature or burning processing.
Lime is quick lime.
Cement is Portland cement.
Pottery sand is flyash ceramic sand or shale pottery.
Early strength agent is that 20% iron chloride, 40% sodium carbonate and 40% triethanolamine compound early strength agent.
The present invention according to red mud from sintering process has strong basicity, particle diameter thin and the characteristic containing flourishing pore, utilizes sintering Method red mud is as alkali-activator and flyash production novel high-strength heat insulation block material, and not only Economization on land and the energy, largely disappear The industrial waste such as red mud and flyash is consumed, is reduced environmental pollution；Also clay brick will be overcome to fire faced predicament simultaneously.
Advantages of the present invention is as follows：
1st, using flyash ceramic sand or shale pottery as insulation material, the reduction of building block heat conductivility is made, hence it is evident that improve insulating brick Thermal and insulating performance.
2nd, early strength is high, and later strength can also be up to state standards.
3rd, red mud-flyash based on alkali-activated carbonatite, makes active particle largely reduce, and makes its product more durable, more environmentally friendly.
4th, for insulating brick after the shaping of each construction technology, final strength grade is 26MPa-38MPa, has the spy of high intensity Point.
5th, the present invention has that moulding process is simple, normal temperature fast reaction solidification, the advantages of non-sintered, non-evaporating pressure, its product Compression strength is high, dry shrinkage resistance is strong, anti-permeability performance is good, and long-term place occurs without scum phenomenon.
6th, largely using industrial waste, the saving energy and resource, cost is low, and energy consumption is small, there is obvious economic benefit, environment Benefit and social benefit.
The present invention is reasonable in design, and using industrial waste flyash, red mud as primary raw material, cement, quick lime are as auxiliary material, powder Coal ash pottery sand or shale pottery largely using industrial waste, are saved the energy, protected farmland, reduce pollution, change as insulation material Kind building function, has great economic results in society.
Brief description of the drawings
Fig. 1 represents the preparation method technological process of the present invention.
Embodiment
The specific embodiment of the present invention is described in detail below.
Embodiment 1
250g red muds, 250g flyash, 250g flyash ceramic sands, 50g cement, 50g lime, 20g stalk fibres, 10g is early strong Agent, the mixing of 120g water（After wherein red mud, flyash, haydite are dewatered drying, add water after ball milling and mixed with early strength agent）, Be sufficiently stirred, be aged 24h under 10-15 DEG C of room temperature environment, mix is poured into the mold, 40MPa forcing presses effect under into Type, then compressing building block is taken out, it is transported to maintenance place natural curing.
Embodiment 2
By the early strong diminishing of 200g red muds, 250g flyash, 300g shale potteries, 40g cement, 70g lime, 15g stalk fibres, 8g Agent, the mixing of 110g water（After wherein red mud, flyash, haydite are dewatered drying, add water after ball milling and mixed with early strength agent）, Be sufficiently stirred, be aged 24h under 10-15 DEG C of room temperature environment, mix is poured into the mold, 40MPa forcing presses effect under into Type, then compressing building block is taken out, it is transported to maintenance place natural curing.
Embodiment 3
By 300g red muds, 200g flyash, 300g shale potteries, 60g cement, 50g lime, 20g stalk fibres, 13g early strength agent, 125g water mixes（After wherein red mud, flyash, haydite are dewatered drying, add water after ball milling and mixed with early strength water-reducing agent Close）, it is sufficiently stirred, is aged 24h under 10-15 DEG C of room temperature environment, mix is poured into the mold, is acted in 40MPa forcing presses Lower shaping, then compressing building block is taken out, it is transported to maintenance place natural curing.
Embodiment 4
By 350g red muds, 250g flyash, 350g shale potteries, 55g cement, 80g lime, 25g stalk fibres, 18g early strength agent, 140g water mixes（After wherein red mud, flyash, haydite are dewatered drying, add water after ball milling and mixed with early strength water-reducing agent Close）, it is sufficiently stirred, is aged 24h under 10-15 DEG C of room temperature environment, mix is poured into the mold, is acted in 40MPa forcing presses Lower shaping, then compressing building block is taken out, it is transported to maintenance place natural curing.
With reference to national standard《Test methods for wall bricks》GB/T 2542-2012 are tested and performance detection.By compound Addition water is put into mixer and is sufficiently stirred, and after being aged by digestion time, mix is poured into the mold, in 40MPa forcing presses Effect is lower to be molded, then compressing building block is taken out, and is transported to maintenance place natural curing and be can obtain finished bricks to 28 days.
Table 1 is that each embodiment matches somebody with somebody when Mechanics Performance Testing
National standard is as shown in table 2 below to the reasonable decision content of non-burning brick mechanical property and classification.
The strength grade criterion of table 2
Proportioning according to table 1 is worked it out non-burning brick through the maintenance of 28 days, and outward appearance is clean and tidy, voucher, N/D, and product pressure resistance Degree is high, dry shrinkage resistance is strong, anti-permeability performance is good, and long-term place occurs without scum phenomenon, experimental result represent this it is non-burning brick can Meet intensity requirement of the national standard on MU15, MU20.
The method have the characteristics that using flyash ceramic sand or shale pottery as insulation material, drop building block heat conductivility It is low, hence it is evident that to improve the thermal and insulating performance of insulating brick；Early strength is high, and later strength can also be up to state standards.
The present invention has that moulding process is simple, and normal temperature fast reaction solidification, the advantages of non-sintered, non-evaporating pressure, its product resists Compressive Strength is high, dry shrinkage resistance is strong, anti-permeability performance is good, and long-term place occurs without scum phenomenon.Largely utilize industrial waste, saving The energy and resource, cost is low, and energy consumption is small, there is obvious economic benefit, environmental benefit and social benefit.
It should be noted last that the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, although ginseng It is described in detail according to the embodiment of the present invention, it will be understood by those within the art that, to technical scheme Modify or equivalent substitution, without departure from the spirit and scope of technical scheme, it all should cover claim In protection domain.

Claims (4)

  1. A kind of 1. red mud based on alkali-activated carbonatite-flyash high-strength heat preservation building block, it is characterised in that：Its constituent mass percentage forms For, red mud 18%-40%, flyash 18%-30%, pottery sand 25%-40%, cement 3%-8%, lime 3%-10%, stalk fibre 1%-3%, Early strength agent 0.5%-2%.
  2. 2. the red mud according to claim 1 based on alkali-activated carbonatite-flyash high-strength heat preservation building block, it is characterised in that：It is early strong Water reducer is formed by 20% iron chloride, 40% sodium carbonate and 40% triethanolamine compounding.
  3. 3. the red mud according to claim 1 or 2 based on alkali-activated carbonatite-flyash high-strength heat preservation building block, it is characterised in that：Institute It is industrial residue to state red mud, and drying is crushed to its particle diameter and is less than 0.15mm；
    The flyash is flyash of the gangue through being collected when broken, milling, Super-fine grinder powder, high temperature or burning processing；
    The lime is quick lime；
    The cement is Portland cement；
    The pottery sand is flyash ceramic sand or shale pottery.
  4. 4. a kind of preparation method of the red mud based on alkali-activated carbonatite-flyash high-strength heat preservation building block described in claim 1-3, it is special Sign is：Comprise the following steps：
    （1）, drying：Red mud and flyash are dried with dryer, remove free moisture therein；
    （2）, grinding：Red mud, flyash, pottery sand are put into ball mill progress grinding to specific surface area and are more than 600m2/kg；
    （3）, mixing and ageing：Red mud, flyash, pottery sand, cement, lime, stalk fibre, early strength agent and water fill in mixer Divide and be stirred, 8-36h is aged under 10-15 DEG C of room temperature environment；
    （4）, extrusion forming：Mix is poured into the mold, is molded under the effect of 40MPa forcing presses；
    （5）, natural curing：Compressing building block is taken out, is transported to maintenance place natural curing.
CN201710587993.0A 2017-07-19 2017-07-19 Red mud-fly ash high-strength heat-insulation building block based on alkali excitation and preparation method thereof Active CN107352928B (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109293325A (en) * 2018-11-05 2019-02-01 山东农业大学 A kind of saline-alkali soil biomass brick and preparation method thereof and application
CN112062544A (en) * 2020-08-20 2020-12-11 广东同创科鑫环保有限公司 Modified red mud-based building block and preparation method thereof
CN113024234A (en) * 2021-02-26 2021-06-25 广东前景建筑科技有限公司 Environment-friendly ceramsite brick and production method thereof
CN113087487A (en) * 2021-04-06 2021-07-09 王壹帆 Construction process for red mud coal gangue aggregate pavement base course stabilized by carbide slag and coal ash
CN113185257A (en) * 2021-03-31 2021-07-30 太原理工大学 Solid waste regeneration foamed ceramic material for heat insulation wall and preparation method thereof
CN113909261A (en) * 2021-11-15 2022-01-11 长沙理工大学 Resource utilization method of dewatered dredging bottom mud
CN114804693A (en) * 2022-02-16 2022-07-29 中铝山西新材料有限公司 Solid waste compound fly ash excitant and application thereof
US11958788B2 (en) 2022-05-30 2024-04-16 Hubei University Of Technology Method of preparing alkali activation material by using red mud-based wet grinding and carbon sequestration and application thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1931772A (en) * 2006-08-30 2007-03-21 河南理工大学 No-baking and no-steaming environment protection solid fly ash-cinder brick
US20100193986A1 (en) * 2007-11-08 2010-08-05 Teng Shaobo Processing method for waste residue produced by burning and desulfurizing oil dregs

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1931772A (en) * 2006-08-30 2007-03-21 河南理工大学 No-baking and no-steaming environment protection solid fly ash-cinder brick
US20100193986A1 (en) * 2007-11-08 2010-08-05 Teng Shaobo Processing method for waste residue produced by burning and desulfurizing oil dregs

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109293325A (en) * 2018-11-05 2019-02-01 山东农业大学 A kind of saline-alkali soil biomass brick and preparation method thereof and application
CN112062544A (en) * 2020-08-20 2020-12-11 广东同创科鑫环保有限公司 Modified red mud-based building block and preparation method thereof
CN113024234A (en) * 2021-02-26 2021-06-25 广东前景建筑科技有限公司 Environment-friendly ceramsite brick and production method thereof
CN113185257A (en) * 2021-03-31 2021-07-30 太原理工大学 Solid waste regeneration foamed ceramic material for heat insulation wall and preparation method thereof
CN113087487A (en) * 2021-04-06 2021-07-09 王壹帆 Construction process for red mud coal gangue aggregate pavement base course stabilized by carbide slag and coal ash
CN113909261A (en) * 2021-11-15 2022-01-11 长沙理工大学 Resource utilization method of dewatered dredging bottom mud
CN114804693A (en) * 2022-02-16 2022-07-29 中铝山西新材料有限公司 Solid waste compound fly ash excitant and application thereof
US11958788B2 (en) 2022-05-30 2024-04-16 Hubei University Of Technology Method of preparing alkali activation material by using red mud-based wet grinding and carbon sequestration and application thereof

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