CN104909818B - Method of the one kind using water-quenched manganese slag-coal ash for manufacturing for air entrained concrete - Google Patents

Method of the one kind using water-quenched manganese slag-coal ash for manufacturing for air entrained concrete Download PDF

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CN104909818B
CN104909818B CN201510318563.XA CN201510318563A CN104909818B CN 104909818 B CN104909818 B CN 104909818B CN 201510318563 A CN201510318563 A CN 201510318563A CN 104909818 B CN104909818 B CN 104909818B
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water
manganese slag
temperature
entrained concrete
air
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CN104909818A (en
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韦家崭
陈平
刘荣进
赵艳荣
姜晗
杨胜桂
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Guilin University of Technology
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Guilin University of Technology
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use of waste materials as fillers for mortars or concrete

Abstract

The invention discloses a kind of method using water-quenched manganese slag-coal ash for manufacturing for air entrained concrete.Raw material weight percentage:Cement 9% 13%, lime 11% 15%, water-quenched manganese slag 10% 20%, flyash 52% 68%, gypsum 2% 4%, ratio of water to material is 0.50 0.55, and aluminium powder cream is the 0.12% of siccative gross weight.Water-quenched manganese slag-powder ash air-entrained concrete building block through raw material grinding, dispensing, quickly stir, pour into a mould, rest get angry, cut, the process such as steam press maintenance is prepared, steaming pressuring curing process system is:Heating 2 hours is to 185 190 DEG C of temperature, atmospheric pressure reaches 1.2 1.25MPa, constant temperature and pressure 6.5 7 hours simultaneously, decrease temperature and pressure arrives normal temperature and pressure in 2 hours again, and the over dry compression strength for finally giving product reaches more than 2.55MPa, and dry volume density is 478 525kg/m3.The present invention prepares high-quality B05 level air-entrained concrete building block products, and only building materials market does not provide the Aerated concrete products of high-strength light, and also the recycling for water-quenched manganese slag finds a new approach.

Description

Method of the one kind using water-quenched manganese slag-coal ash for manufacturing for air entrained concrete
Technical field
Belong to construction material skill using water-quenched manganese slag-coal ash for manufacturing for the method for air entrained concrete the present invention relates to one kind Art field.
Background technology
With the rapid development of social economy, the consumption and depletion rate of the energy are gradually increasing, energy problem and Environmental problem becomes increasingly conspicuous, and both turn into the major test of 21 century facing mankind.It is reported that arrive the year two thousand twenty, urban and urual areas of whole country room Room building will increase the m of construction area about 30,000,000,0002, building energy consumption accounts for the 30% of China's energy total flow, and development building energy conservation is carved not Rong Huan.According to the energy saving policy in China, the year two thousand twenty was played from 2010, average energy saving will reach 65%, and building energy conservation will turn into Improve the primary aspect of whole society's energy use efficiency.
Air-entrained concrete building block be a kind of stomata uniformly, surfacing, neat, easy construction the light energy conservation of corner angle it is new Type materials for wall, there is lightweight, insulation, heat-insulated, non-ignitable.Mainly using flyash, sand or other industrial residues as original Material(Volume more than 65%), through Feedstock treating, dispensing, stir, get angry, cut, the product made of technique such as conserve, available for generation For traditional clay brick, for building wall, bulk density is 1/3rd of clay brick, and heat-insulating property is clay brick 3~4 times, sound insulation value is 2 times of clay brick, and anti-permeability performance is more than 1 times of clay brick, and the masonry strength of building block is about building block The 80% of self-strength(Common brick is 30%), it is a kind of good construction material with energy-saving heat preserving function.
At the same time, country's related wall reform policy, Building Energy Conservation Policy and environmental protection policy is all encouraged to various industry Waste residue carries out building resource, widelys popularize lightweight, the novel wall material of insulation.Water-quenched manganese slag is as a kind of large Industry Waste Slag, it is the waste residue that high temperature furnace slag that manganeisen, silicomangan discharge in blast furnace ironmaking process is formed through water quenching chilling.Water quenching Manganese slag is distributed widely in the provinces and regions such as Guangxi, Hunan, Liaoning, Guizhou, current national about 20,000,000 tons of water-quenched manganese slag annual emissions, extremely The present, accumulative accumulation was more than 100,000,000 tons.
Chinese invention patent(CN103922652A)Disclose one kind and prepare air entrained concrete using water-quenched manganese slag-sand Method.Chinese invention patent(CN103979997A)Disclose one kind and make aggregate preparation high intensity aerating coagulation using water-quenched manganese slag The method of soil.At present, had no and had been reported that with the compound method for preparing air entrained concrete of flyash using water-quenched manganese slag.
For current water-quenched manganese slag resource utilization rate it is not high the problem of, and national energy-saving walling Correlative plan requirement, It is proposed by water-quenched manganese slag composite fly ash be used for prepare air entrained concrete, there is the characteristics of lateral reactivity using it, by material- The common exciting method of chemistry(Physics grinding activity excitation, lime alkalescence condition activity excitation), water-quenched manganese slag can be given full play to Lateral reactivity, promote water-quenched manganese slag to participate in the hydro-thermal reaction of air entrained concrete, tobermorite is generated, so as to improve product Intensity.While improving manganese slag resource utilization rate, high-quality aerated concrete products are prepared, have both solved pollution of Mn dregs ring Border social status quo, a kind of high-quality energy-saving wall material is provided for building trade again, there is obvious social benefit and economy Benefit.
The content of the invention
The invention aims to solve the problems such as not high current water-quenched manganese slag utilization rate, pollution environment, mixed according to aerating Solidifying soil can make full use of the characteristics of industrial solid castoff, there is provided a kind of that water-quenched manganese slag is substituted into part flyash as siliceous The method that material prepares autoclave aerated concrete building block.
The technology specifically comprises the steps of:
(1)Dispensing by weight percentage:Cement 9%-13%, lime 11%-15%, water-quenched manganese slag 10%-20%, flyash 52%- 68%, gypsum 2%-4%, ratio of water to material 0.50-0.55, aluminium powder cream are the 0.12% of siccative gross weight.
(2)Water-quenched manganese slag is dried to moisture content less than 1%, is put into ball mill grinding to specific surface area 400-450m2/ Kg, flyash are milled to specific surface area 350-400 m in ball mill2/ kg, lime are milled to specific surface area 380-420m2/kg 。
(3)By gypsum, cement and step(2)Resulting water-quenched manganese slag micro mist, flyash are according to step(1)Proportioning it is equal Adding water and stir together 2-3 minutes after even mixing obtains mixed slurry.
(4)By step(2)Resulting lime is added to step(3)4-5 minutes are stirred in gained mixed slurry, then The aluminium powder cream for adding siccative gross weight 0.12% is stirred for 30 seconds, obtains well mixed slurry, then by well mixed material Rapid pour into air-entrained concrete building block mould of slurry is got angry, and Insulation is set in whipping process, ensures entering during slip casting Mould temperature is at 40-45 DEG C.
(5)At a temperature of mould equipped with castable is placed on into 45-50 DEG C conserve 2.5-3 hours, make slurry normally get angry and Thickening, after intensity reaches split requirement, size cuts base substrate on request.
(6)Air-entrained concrete building block mould is removed, and the air-entrained concrete building block cut is delivered in still kettle and carried out Steam press maintenance, steaming pressuring curing process system are:Increasing temperature and pressure 2 hours to 185-190 DEG C of temperature, atmospheric pressure reaches 1.2- 1.25MPa, constant temperature and pressure 6.5-7 hours, then decrease temperature and pressure arrive normal temperature and pressure in 2 hours, that is, obtain air-entrained concrete building block production Product.
Obtained water-quenched manganese slag-coal ash autoclaved air-entrained concrete building block over dry compression strength reach 2.55MPa with On, dry volume density is 478-525kg/m3, meet B05 levels air entrained concrete high-class product as defined in national standard GB11968-2006 and The requirement of certified products.
Present invention utilizes water-quenched manganese slag to have the characteristics of lateral reactivity, passes through the common exciting method of material-chemistry(Physics powder Grind activity excitation, lime alkalescence condition activity excitation), the lateral reactivity of water-quenched manganese slag can be given full play to, promotes water-quenched manganese slag Participate in the hydro-thermal reaction of air entrained concrete, tobermorite is generated, so as to improve product strength.
Embodiment
Embodiment 1:
(1)Dispensing by weight percentage:Cement 9%, lime 11%, water-quenched manganese slag 10%, flyash 68%, gypsum 2%, water material Than for 0.55, aluminium powder cream is the 0.12% of siccative gross weight.
(2)Water-quenched manganese slag is dried to moisture content less than 1%, is put into ball mill grinding to specific surface area 438m2/ kg, powder Coal ash is milled to the m of specific surface area 400 in ball mill2/ kg, lime are milled to specific surface area 413m2/kg 。
(3)By gypsum, cement and step(2)Resulting water-quenched manganese slag micro mist, flyash are according to step(1)Proportioning it is equal After even mixing plus water quickly stirs 3 minutes to obtain mixed slurry together.
(4)By step(2)Resulting pulverized limestone is added to step(3)Quick stirring 5 minutes in gained mixed slurry, so The aluminium powder cream for adding siccative gross weight 0.12% afterwards is stirred for 30 seconds, obtains well mixed slurry, then will be well mixed Slurry is poured into rapidly in air-entrained concrete building block mould and got angry, and sets Insulation in whipping process, when ensureing slip casting Molding temperature is at 43 DEG C.
(5)Conserved 3 hours at a temperature of mould equipped with castable is placed on into 47 DEG C, slurry is normally got angry and is thickened, by force After degree reaches split requirement, size cuts base substrate on request.
(6)Air-entrained concrete building block mould is removed, and the air-entrained concrete building block cut is delivered in still kettle and carried out Steam press maintenance, steaming pressuring curing process system are:Increasing temperature and pressure 2 hours to 190 DEG C of temperature, atmospheric pressure reaches 1.25MPa, constant temperature Constant pressure 7 hours, then decrease temperature and pressure arrive normal temperature and pressure in 2 hours, that is, it is 486kg/m to obtain unit weight3, intensity be 4.45MPa aerating Concrete segment product.
Embodiment 2:
(1)Dispensing by weight percentage:Cement 9%, lime 13%, water-quenched manganese slag 15%, flyash 60%, gypsum 3%, water material Than for 0.53, aluminium powder cream is the 0.12% of siccative gross weight.
(2)Water-quenched manganese slag is dried to moisture content less than 1%, is put into ball mill grinding to specific surface area 445m2/ kg, powder Coal ash is milled to the m of specific surface area 380 in ball mill2/ kg, lime are milled to specific surface area 407m2/kg 。
(3)By gypsum, cement and step(2)Resulting water-quenched manganese slag micro mist, flyash are according to step(1)Proportioning it is equal After even mixing plus water quickly stirs 2.5 minutes to obtain mixed slurry together.
(4)By step(2)Resulting pulverized limestone is added to step(3)Quick 4.5 points of stirring in gained mixed slurry Clock, the aluminium powder cream for then adding siccative gross weight 0.12% are stirred for 30 seconds, obtain well mixed slurry, then will mixing Uniform slurry, which is poured into rapidly in air-entrained concrete building block mould, is got angry, and Insulation is set in whipping process, ensures that slurry pours Molding temperature during note is at 44 DEG C.
(5)Conserved 2.8 hours at a temperature of mould equipped with castable is placed on into 50 DEG C, slurry is normally got angry and is thickened, After intensity reaches split requirement, size cuts base substrate on request.
(6)Air-entrained concrete building block mould is removed, and the air-entrained concrete building block cut is delivered in still kettle and carried out Steam press maintenance, steaming pressuring curing process system are:Increasing temperature and pressure 2 hours to 190 DEG C of temperature, atmospheric pressure reaches 1.25MPa, constant temperature Constant pressure 7 hours, then decrease temperature and pressure arrive normal temperature and pressure in 2 hours, that is, it is 478kg/m to obtain unit weight3, intensity be 3.86MPa aerating Concrete segment product.
Embodiment 3:
(1)Dispensing by weight percentage:Cement 11%, lime 13%, water-quenched manganese slag 20%, flyash 54%, gypsum 2%, water material Than for 0.51, aluminium powder cream is the 0.12% of siccative gross weight.
(2)Water-quenched manganese slag is dried to moisture content less than 1%, is put into ball mill grinding to specific surface area 426m2/ kg, powder Coal ash is milled to the m of specific surface area 371 in ball mill2/ kg, lime are milled to specific surface area 390m2/kg 。
(3)By gypsum, cement and step(2)Resulting water-quenched manganese slag micro mist, flyash are according to step(1)Proportioning it is equal After even mixing plus water quickly stirs 2.5 minutes to obtain mixed slurry together.
(4)By step(2)Resulting pulverized limestone is added to step(3)Quick stirring 4 minutes in gained mixed slurry, Then the aluminium powder cream for adding siccative gross weight 0.12% is stirred for 30 seconds, obtains well mixed slurry, then will be well mixed Slurry pour into rapidly in air-entrained concrete building block mould and get angry, Insulation is set in whipping process, when ensureing slip casting Molding temperature at 40 DEG C.
(5)Conserved 2.5 hours at a temperature of mould equipped with castable is placed on into 45 DEG C, slurry is normally got angry and is thickened, After intensity reaches split requirement, size cuts base substrate on request.
(6)Air-entrained concrete building block mould is removed, and the air-entrained concrete building block cut is delivered in still kettle and carried out Steam press maintenance, steaming pressuring curing process system are:Increasing temperature and pressure reaches 1.2MPa in 2 hours to 185 DEG C of temperature, atmospheric pressure, and constant temperature is permanent Pressure 6.5 hours, then decrease temperature and pressure arrive normal temperature and pressure in 2 hours, that is, it is 510kg/m to obtain unit weight3, intensity be 3.25MPa aerating Concrete segment product.

Claims (1)

1. method of the one kind using water-quenched manganese slag-coal ash for manufacturing for air entrained concrete, it is characterised in that concretely comprise the following steps:
(1)Dispensing by weight percentage:Cement 9%, lime 11%, water-quenched manganese slag 10%, flyash 68%, gypsum 2%, ratio of water to material are 0.50-0.55, aluminium powder cream are the 0.12% of siccative gross weight;
(2)Water-quenched manganese slag is dried to moisture content less than 1%, is put into ball mill grinding to specific surface area 400-450m2/ kg, powder Coal ash is milled to specific surface area 350-400 m in ball mill2/ kg, lime are milled to specific surface area 380-420m2/kg ;
(3)By gypsum, cement and step(2)Resulting water-quenched manganese slag micro mist, flyash are according to step(1)Proportioning uniformly mix Adding water and stir together 2-3 minutes after conjunction obtains mixed slurry;
(4)By step(2)Resulting lime is added to step(3)4-5 minutes are stirred in gained mixed slurry, are then added The aluminium powder cream of siccative gross weight 0.12% is stirred for 30 seconds, obtains well mixed slurry, then that well mixed slurry is fast Speed is poured into air-entrained concrete building block mould and got angry, ensure slip casting when molding temperature at 40-45 DEG C;
(5)2.5-3 hours are conserved at a temperature of mould equipped with castable is placed on into 45-50 DEG C, slurry is normally got angry and is thickened, After intensity reaches split requirement, size cuts base substrate on request;
(6)Air-entrained concrete building block mould is removed, and the air-entrained concrete building block cut is delivered to steam pressure is carried out in still kettle Maintenance, steaming pressuring curing process system are:Increasing temperature and pressure 2 hours to 185-190 DEG C of temperature, atmospheric pressure reaches 1.2-1.25MPa, Constant temperature and pressure 6.5-7 hours, then decrease temperature and pressure arrive normal temperature and pressure in 2 hours, that is, obtain air-entrained concrete building block product.
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CN108947286A (en) * 2017-05-23 2018-12-07 北方民族大学 It is a kind of based on manganese slag, the geo-polymer gel rubber material of flyash and its preparation method and application

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1443727A (en) * 2003-02-27 2003-09-24 穆桢子 High-strength light concrete and its production method
CN103922652A (en) * 2014-03-31 2014-07-16 桂林理工大学 Method of preparing aerated concrete by utilizing water-quenched manganese slag

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1443727A (en) * 2003-02-27 2003-09-24 穆桢子 High-strength light concrete and its production method
CN103922652A (en) * 2014-03-31 2014-07-16 桂林理工大学 Method of preparing aerated concrete by utilizing water-quenched manganese slag

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