CN105541384A - Ultralight foam concrete and preparing method thereof - Google Patents

Ultralight foam concrete and preparing method thereof Download PDF

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Publication number
CN105541384A
CN105541384A CN201510999989.6A CN201510999989A CN105541384A CN 105541384 A CN105541384 A CN 105541384A CN 201510999989 A CN201510999989 A CN 201510999989A CN 105541384 A CN105541384 A CN 105541384A
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foamed concrete
ultralight foamed
concrete
ultralight
water
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CN105541384B (en
Inventor
何向东
贾兴文
王洪木
蔡静
胡皞
司端科
张新
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Cceg Second Construction Co Ltd
Chongqing University
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Cceg Second Construction Co Ltd
Chongqing University
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions 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
    • C04B28/06Aluminous cements
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/40Porous or lightweight materials
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/20Mortars, concrete or artificial stone characterised by specific physical values for the density
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/30Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
    • C04B2201/32Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength

Abstract

The invention relates to ultralight foam concrete and a preparing method thereof. The ultralight foam concrete is prepared by adopting common Portland cement, quick-to-solid sulphate aluminium cement, sludge of concrete batching plant, polycarboxylate superplasticizer, re-dispersible latex powder, hydroxypropyl methyl cellulose ether, calcium stearate, sintered shale brick powder, polypropylene fiber, hydrogen peroxide, water and the like through stirring, mixing, foaming, pouring, molding, curing and the like. The ultralight foam concrete has the advantages of low cost, high use rate of waste, high foaming efficiency of hydrogen peroxide, and good physical and mechanical properties, and an effect of preparing the ultralight foam concrete by using building garbage and wastes is achieved. The ultralight foam concrete is used for roof thermal insulation, wall body cavity filling and building floor thermal insulation.

Description

A kind of ultralight foamed concrete and preparation method thereof
Technical field
The present invention relates to a kind of ultralight foamed concrete and preparation method thereof, belong to building energy-saving heat-insulating material technical field.
Background technology
Ultralight foamed concrete is often referred to dry density and is not more than 300kg/m 3foamed concrete, but when practical application, ultralight foamed concrete is typically designed to 150-200kg/m 3.The main application of ultralight foamed concrete is as wall cavity packing material for the preparation of structural thermal insulation integration materials for wall, to improve the incubation and thermal insulation function of buildings.Ultralight foamed concrete can also be used for roof heat insulation and flooring insulation, also may be used for foundation filling etc.
At present for the preparation of whipping agent mainly pneumatogen and the chemical foaming agent of ultralight foamed concrete.The most frequently used chemical foaming agent is hydrogen peroxide.When using hydrogen peroxide to prepare ultralight foamed concrete as whipping agent, because decomposing hydrogen dioxide solution speed of response is slower, decomposition efficiency is low, therefore hydrogen peroxide consumption must be increased, admixture 50-60 DEG C hot water is also needed to improve ultralight foamed concrete slurry temperature, thus improve decomposing hydrogen dioxide solution speed of response and efficiency, reduce apparent density and the thermal conductivity of ultralight foamed concrete.But after rising slurry temperature, the restriction of decomposing hydrogen dioxide solution raising rate is accelerated, and causes a large amount of gas overflowing, slip may be caused on the contrary to subside.In addition, raise after slurry temperature also can cause ultralight foamed concrete to harden and produce temperature shrinkage fracture.The a large amount of oxygen produced in order to avoid hydrogen peroxide fast decoupled overflow, and the mode usually adopted in production process is admixture thickening material and suds-stabilizing agent.But increase thickening material and suds-stabilizing agent consumption cause ultralight foamed concrete preparation cost to raise.
The sewage that concrete mixing plant mud produces after mainly rinsing concrete tank and whipping device after filtration with multi stage precipitation after the floc sludge that produces, its main component is unhydrated cement granules, flyash, sand, the pH value of this floc sludge is more than 12.0, therefore, concrete mixing plant mud also has certain activity, just active relatively low.In addition, stirring station mud specific surface area is 3-5 times of ordinary Portland cement, and therefore, it has good filling effect.These mud periodic cleanings out and be deposited in production plant area.At random for the mud cleared is deposited in plant area by a lot of concrete mixing plant, mud air storage gives free rein to drying, not only cause serious dust pollution, the problem of sewage trickling, also cause some stirring stations also to need to expend mud and the waste residue of fund periodic cleaning stacking.Can have a negative impact to its mechanical property because mud is spiked in normal concrete, therefore the mud of stirring station belongs to waste.Because mud is not but used effectively, thus create serious sewage pollution and dust pollution question.
Summary of the invention
In order to avoid the ultralight foamed concrete preparation cost caused because of increase thickening material and suds-stabilizing agent consumption raises problem, the invention provides a kind of ultralight foamed concrete and preparation method thereof, the present invention selects cheap, easy acquisition, be convenient to disperse, there is the adulterant of concrete mixing plant mud as ultralight foamed concrete of certain hydration activity, and select cheap, prepare the catalyzer that simple sintering shale brick powder reacts as decomposing hydrogen dioxide solution.
The present inventor is found by test, and by the concrete mixing plant mud that flocculent precipitate 105-110 in concrete stirring station sedimentation basin DEG C obtains after drying, primary aqueous and ultra-fine grain, specific surface area is 800-1100m 2/ kg, activity index is 65%-70%, and pH value is more than 12.0, and wherein, ultra-fine grain is as the adulterant of ultralight foamed concrete, and water is as mixing water, decreases the consumption of tap water, and pH value more than 12.0 is conducive to hydrogen peroxide foaming.Admixture concrete mixing plant mud and sintering shale brick powder make the mass output rate of ultralight foamed concrete improve 1.2-1.4 doubly, and dry density reduces 20%-30%.
The technical scheme that the present invention solves the problems of the technologies described above is as follows: a kind of ultralight foamed concrete, with parts by weight, is made up of following raw material:
Ordinary Portland cement: 80-120 part
Quick hardening sulphoaluminate cement: 10-40 part
Concrete mixing plant mud: 40-10 part
Polycarboxylate water-reducer: 0.5-1.5 part
Redispersable latex powder: 2-4 part
Hydroxypropyl methyl cellulose ether: 0.1-0.4 part
Polypropylene fibre: 1-3 part
Calcium stearate: 0.2-0.4 part
Sintering shale brick powder: 0.5-2.0 part
Hydrogen peroxide: 6-8 part
Water: 50-80 part.
On the basis of technique scheme, the present invention can also do following improvement.
Further, described ordinary Portland cement is 52.5 grades of ordinary Portland cements.
Adopting the beneficial effect of this step to be 52.5 grades of ordinary Portland cements is enhancement component, mainly as gelatinous material.
Further, described quick hardening sulphoaluminate cement is 42.5 grades of quick hardening sulphoaluminate cements.
Adopting the beneficial effect of this step to be 42.5 grades of quick hardening sulphoaluminate cements is accelerating components, not only has enhancement, can also accelerate slurry setting and harden speed, avoid the mould that collapses, and also accelerates mould turnaround speed simultaneously, enhances productivity.
Further, described concrete mixing plant mud obtains after drying by flocculent precipitate 105-110 in concrete stirring station sedimentation basin DEG C, and the specific surface area of concrete mixing plant mud is 800-1100m 2/ kg.
The beneficial effect of this step is adopted to be that the floc sludge cleaned out in concrete stirring station sedimentation basin contains a large amount of ultra-fine grains, these ultra-fine grain specific surface areas are very high and have certain activity, can as the adulterant of ultralight foamed concrete, there is the effect increasing slurry denseness and stability, also be conducive to improving ultralight foamed concrete later strength, along with the increase of concrete mixing plant mud volume, because ultra-fine grain specific surface area is large and density is little, ultralight foamed concrete slurry volume will enlarge markedly, thus be conducive to the dry density reducing ultralight foamed concrete.
Further, described polycarboxylate water-reducer is ethers polycarboxylic acid water reducing agent, and solid content is 20%.
Adopt the beneficial effect of this step to be that ethers polycarboxylic acid water reducing agent plays raising fresh paste mobility and reduces mixing water consumption, reduce the effect of dry density.
Further, described redispersable latex powder is Vinyl Acetate Copolymer-ethylene copolymer latex powder (VAE).
Adopting the beneficial effect of this step to be Vinyl Acetate Copolymer-ethylene copolymer latex powder (VAE) is water-soluble redispersible powder, is that one can strengthen slurry force of cohesion, cohesive force and flexible organic gel gel material.
Further, the viscosity of described hydroxypropyl methyl cellulose ether (HPMC) is 100,000 Pa 〃 s.
The beneficial effect of this step is adopted to be that hydroxypropyl methyl cellulose ether plays the effect significantly strengthening slurry cohesiveness, water-retentivity, thickening property and stability.
Further, described polypropylene fibre is polypropylene monofil cut staple.
Adopt the beneficial effect of this step to be that polypropylene monofil cut staple plays the folding strength improving ultralight foamed concrete, strengthen the splitting resistance effect of ultralight foamed concrete.
Further, described sintering shale brick powder is that sintering shale brick is crossed 75 tm screen after crushed and obtain, and the building waste sintering shale brick that brick structures removes afterwards gained taken from by sintering shale brick.
The beneficial effect of this step is adopted to be containing Fe in sintering shale brick powder 2o 3, have katalysis to decomposing hydrogen dioxide solution.
Further, the mass concentration of described hydrogen peroxide is 30%.
Adopt the beneficial effect of this step be hydrogen peroxide as chemical foaming agent, decomposition produces oxygen, and oxygen is wrapped in slip and forms a large amount of holes, thus formed foamed concrete.
Further, described water is tap water, and during use tap water, summer need not heat, and needs winter to ensure that water temperature is 20-30 DEG C.
Adopt the beneficial effect of this step to be that the tap water of 20-30 DEG C can not cause decomposing hydrogen dioxide solution raising rate to be accelerated, after ultralight foamed concrete also can not be caused to harden, produce temperature shrinkage fracture.The effect of water is that wetting powder body material forms slurry.
The present invention also provides a kind of preparation method of above-mentioned ultralight foamed concrete, comprising:
1) ordinary Portland cement, quick hardening sulphoaluminate cement, polycarboxylate water-reducer, redispersable latex powder, hydroxypropyl methyl cellulose ether, polypropylene fibre, calcium stearate and sintering shale brick powder is got, stirring and evenly mixing, add water again, stir after forming flow-like slurry stand-by, twice is stirred instrument is forced mixer, and each churning time is 30 seconds;
2) concrete mixing plant mud being joined 1) in the flow-like slurry that obtains, forced mixer stirs 60 seconds, obtains slurry;
3) hydrogen peroxide being joined 2) in the slurry that obtains, high speed agitator stirs 15-30 second, starts to form (referring to that slurry starts the moment occurring that volume increases), obtain mixture to bubble;
4) by 3) mixture that obtains be poured into normal temperature in mould leave standstill 1d after form removal or be poured in materials for wall cavity, be then placed on maintenance 28d under normal temperature laboratory, obtain ultralight foamed concrete.
1) in, because the amount ratio of hydroxypropyl methyl cellulose ether and calcium stearate is less, add after adopting the projection electronic weighing of weighing precision 0.1g and make its deal accurate.
4) in, shaping and maintaining process all belongs to general knowledge known in this field.
During the invention process, without the need to adopting special whipping device and preparation of construction, easy construction, preparation cost is low, and the ultralight foamed concrete that ultralight foamed concrete dry density is prepared than prior art reduces 20%-30%.Ultralight foamed concrete early strength after sclerosis is high, and 3d ultimate compression strength reaches 0.3MPa; Later strength also increases to some extent, and 28d ultimate compression strength reaches 0.6MPa; Dry density 160-180kg/m 3, water-intake rate is less than 20%, product index in construction industry standard JG/T407-2013 " self-insulating concrete composite block " for the requirement of foamed concrete.When the present invention is for the production of heat preservation plate material, thermal insulative building blocks and bottling wall cavity, can meet the demands in conjunction with conventional construction technology, and the bonding strength of the basic unit such as ultralight foamed concrete and concrete, shale brick, building block, stone material is higher, not easily occurs hollowing, ftracture and the qualitative problems of construction such as to come off.
The invention has the beneficial effects as follows:
(1) major gelled material that the present invention is used is ordinary Portland cement, utilize in addition in concrete mixing plant production process produce but be difficult to utilize floc sludge as adulterant, raw materials wide material sources, cheap, therefore ultralight foamed concrete raw material preparation cost obviously reduces, easy to utilize; Utilize floc sludge as adulterant, be conducive to improving slurry denseness and foam stability energy, be also conducive to improving later strength simultaneously.
(2) the sintering shale brick powder adopted plays the effect of catalyzer, guarantee that hydrogen peroxide decomposes comparatively completely in slurry, thus effectively reduce the dry density of ultralight foamed concrete, make ultralight foamed concrete have good heat-insulating property, dry density is lower than 200kg/m 3, thermal conductivity is lower than 0.060W/ (m 〃 K), and ultimate compression strength reaches 0.6MPa.
(3) by additives such as admixture redispersable latex powder, methylhydroxypropylcellulose ethers, significantly improve the rheological of ultralight foamed concrete, improve denseness and the foam stability energy of slurry, with the intensity and the water tolerance that also improve ultralight foamed concrete.Admixture polypropylene fibre contributes to the folding strength and the splitting resistance that improve ultralight foamed concrete.
(4) admixture calcium stearate not only can improve the foam stability of ultralight foamed concrete slurry, also the water-intake rate of the ultralight foamed concrete after sclerosis can be reduced, for improving bubble stability and extending the bubble-break cycle, make generate ultralight foamed concrete internal void evenly, aperture is less, reduce its dry density and thermal conductivity, reduce water-intake rate and can guarantee that its thermal conductivity in use can not enlarge markedly, thus improve its thermal and insulating performance.
(5) through overtesting, the ultralight foamed concrete that the present invention obtains, dry density is lower than 200kg/m 3, ultimate compression strength reaches 0.5-0.6MPa, and folding strength reaches 0.3MPa, is a kind of lagging material of high-strength light.
(6), during the invention process, each concrete steps remain ordinary process, are highly susceptible to factorial construction.
Embodiment
Be described principle of the present invention and feature below, example, only for explaining the present invention, is not intended to limit scope of the present invention.
Embodiment 1
The material component adopted in the present embodiment and the volume of mixing ratio as follows:
52.5 grades of ordinary Portland cement: 120kg
42.5 grades of quick hardening sulphoaluminate cement: 20kg
Concrete mixing plant mud: 40kg
Solid content is the ethers polycarboxylic acid water reducing agent of 20%: 0.5kg
Vinyl Acetate Copolymer-ethylene copolymer latex powder (VAE): 2kg
Viscosity is the hydroxypropyl methyl cellulose ether (HPMC) of 100,000 Pas: 0.1kg
Polypropylene monofil cut staple: 1kg
Calcium stearate: 0.2kg
Sintering shale brick powder: 1.0kg
The hydrogen peroxide of mass concentration 30.0%: 6kg
Tap water: 80kg
Wherein, described sintering shale brick powder be sintering shale brick after crushed cross 75 tm screen obtain, described concrete mixing plant mud by flocculent precipitate 105-110 in concrete stirring station sedimentation basin DEG C oven dry after obtain, specific surface area is 800-1100m 2/ kg.
Employing following steps obtain:
A, get 52.5 grades of ordinary Portland cements, 42.5 grades of quick hardening sulphoaluminate cements, ethers polycarboxylic acid water reducing agent, Vinyl Acetate Copolymer-ethylene copolymer latex powder, hydroxypropyl methyl cellulose ether, polypropylene monofil cut staple, calcium stearate and sintering shale brick powder, be uniformly mixed, add tap water again, stir after forming flow-like slurry stand-by, twice is stirred instrument is forced mixer, and each churning time is 30 seconds;
B, to be joined by concrete mixing plant mud in flow-like slurry that a step obtains, forced mixer stirs 60 seconds, obtains slurry;
C, to be joined by hydrogen peroxide in slurry that b step obtains, high speed agitator stirs 15-30 second, starts to be formed, obtain mixture to bubble;
D, mixture step c obtained are poured into form removal after 1d in mould, are then placed on maintenance 28d under normal temperature laboratory, obtain the ultralight foamed concrete with good physical mechanical property.
Embodiment 2
The material component adopted in the present embodiment and the volume of mixing ratio as follows:
52.5 grades of ordinary Portland cement: 100kg
42.5 grades of quick hardening sulphoaluminate cement: 30kg
Concrete mixing plant mud: 60kg
Solid content is the ethers polycarboxylic acid water reducing agent of 20%: 1.0kg
Vinyl Acetate Copolymer-ethylene copolymer latex powder (VAE): 2.5kg
Viscosity is the hydroxypropyl methyl cellulose ether (HPMC) of 100,000 Pas: 0.2kg
Polypropylene monofil cut staple: 1.5kg
Calcium stearate: 0.3kg
Sintering shale brick powder: 1.5kg
The hydrogen peroxide of mass concentration 30.0%: 6.5kg
Tap water: 60kg
Wherein, described sintering shale brick powder be sintering shale brick after crushed cross 75 tm screen obtain, described concrete mixing plant mud by flocculent precipitate 105-110 in concrete stirring station sedimentation basin DEG C oven dry after obtain, specific surface area is 800-1100m 2/ kg.
In the present embodiment, concrete preparation process is identical with embodiment 1.
Embodiment 3
The material component adopted in the present embodiment and the volume of mixing ratio as follows:
52.5 grades of ordinary Portland cement: 100kg
42.5 grades of quick hardening sulphoaluminate cement: 40kg
Concrete mixing plant mud: 80kg
Solid content is the ethers polycarboxylic acid water reducing agent of 20%: 1.0kg
Vinyl Acetate Copolymer-ethylene copolymer latex powder (VAE): 3.0kg
Viscosity is the hydroxypropyl methyl cellulose ether (HPMC) of 100,000 Pas: 0.2kg
Polypropylene monofil cut staple: 1.5kg
Calcium stearate: 0.3kg
Sintering shale brick powder: 1.5kg
The hydrogen peroxide of mass concentration 30.0%: 7kg
Tap water: 60kg
Wherein, described sintering shale brick powder be sintering shale brick after crushed cross 75 tm screen obtain, described concrete mixing plant mud by flocculent precipitate 105-110 in concrete stirring station sedimentation basin DEG C oven dry after obtain, specific surface area is 800-1100m 2/ kg.
In the present embodiment, concrete preparation process is identical with embodiment 1.
Embodiment 4
The material component adopted in the present embodiment and the volume of mixing ratio as follows:
52.5 grades of ordinary Portland cement: 90kg
42.5 grades of quick hardening sulphoaluminate cement: 40kg
Concrete mixing plant mud: 80kg
Solid content is the ethers polycarboxylic acid water reducing agent of 20%: 1.25kg
Vinyl Acetate Copolymer-ethylene copolymer latex powder (VAE): 3.0kg
Viscosity is the hydroxypropyl methyl cellulose ether (HPMC) of 100,000 Pas: 0.3kg
Polypropylene monofil cut staple: 2.0kg
Calcium stearate: 0.3kg
Sintering shale brick powder: 1.5kg
The hydrogen peroxide of mass concentration 30.0%: 7kg
Tap water: 50kg
Wherein, described sintering shale brick powder be sintering shale brick after crushed cross 75 tm screen obtain, described concrete mixing plant mud by flocculent precipitate 105-110 in concrete stirring station sedimentation basin DEG C oven dry after obtain, specific surface area is 800-1100m 2/ kg.
In the present embodiment, concrete preparation process is identical with embodiment 1.
Embodiment 5
The material component adopted in the present embodiment and the volume of mixing ratio as follows:
52.5 grades of ordinary Portland cement: 80kg
42.5 grades of quick hardening sulphoaluminate cement: 40kg
Concrete mixing plant mud: 100kg
Solid content is the ethers polycarboxylic acid water reducing agent of 20%: 1.5kg
Vinyl Acetate Copolymer-ethylene copolymer latex powder (VAE): 3kg
Viscosity is the hydroxypropyl methyl cellulose ether (HPMC) of 100,000 Pas: 0.4kg
Polypropylene monofil cut staple: 2kg
Calcium stearate: 0.4kg
Sintering shale brick powder: 2.0kg
The hydrogen peroxide of mass concentration 30.0%: 8kg
Tap water: 40kg
Wherein, described sintering shale brick powder be sintering shale brick after crushed cross 75 tm screen obtain, described concrete mixing plant mud by flocculent precipitate 105-110 in concrete stirring station sedimentation basin DEG C oven dry after obtain, specific surface area is 800-1100m 2/ kg.
In the present embodiment, concrete preparation process is identical with embodiment 1.
Experimental result
By embodiment 1, embodiment 3 and the embodiment 5 requirement shaping test piece according to national standard " foamed concrete " (JG/T266-2011), test mechanical property, thermal conductivity and water-intake rate.Experimental technique and result as follows:
1) mensuration of the ultimate compression strength of test specimen is with reference to " foamed concrete " (JG/T266-2011), and test-results is in table 1.
Mechanical property/the MPa of the ultralight foamed concrete of table 1
2) dry density of ultralight foamed concrete and Measured Results of Thermal Conductivity are with reference to " foamed concrete " (JG/T266-2011), and test-results is in table 2.
The dry density of the ultralight foamed concrete of table 2 and thermal conductivity
3) water-intake rate of ultralight foamed concrete measures with reference to " foamed concrete " (JG/T266-2011), and test-results is in table 3.
The water-intake rate (%) of the ultralight foamed concrete of table 3
The length of time 28d
Embodiment 1 15.8
Embodiment 3 18.6
Embodiment 5 16.9
Can find out according to above testing data, ultralight foamed concrete prepared by the present invention meets the performance requriements about ultralight foamed concrete in national standard JG/T407-2013 " self-insulating concrete composite block ", and dry density is 160 ~ 200kg/m 3, 28d ultimate compression strength Schwellenwert is 0.50MPa, exceedes dry density 300kg/m in industry standard 3foamed concrete ultimate compression strength should be greater than the requirement of 0.3MPa, thermal conductivity is also less than 0.060W/ (m 〃 K).And, the ultralight foamed concrete water-intake rate that the present invention relates to is less, along with the increase of calcium stearate volume, the water-intake rate of ultralight foamed concrete reduces gradually, illustrate the present invention not easily to absorb water in actual use and cause thermal property to reduce, contribute to the heat-insulating property improving ultralight foamed concrete, avoid ultralight foamed concrete and in use produce the risk that temperature-caused shrinkage and heat-insulating property obviously decline because water-intake rate is high.
Wherein, the thermal conductivity of embodiment 3 is minimum, and thermal property is best, is suitable for requiring high building to heat-insulating property; Embodiment 1 mechanical property is best, and early strength is also best, contributes to accelerating speed of application; Embodiment 5 economy is best, and its mechanical property, thermal property are very good, can as the optimum mix of actual production.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (10)

1. a ultralight foamed concrete, is characterized in that, with parts by weight, is made up of following raw material:
Ordinary Portland cement: 80-120 part
Quick hardening sulphoaluminate cement: 10-40 part
Concrete mixing plant mud: 40-10 part
Polycarboxylate water-reducer: 0.5-1.5 part
Redispersable latex powder: 2-4 part
Hydroxypropyl methyl cellulose ether: 0.1-0.4 part
Polypropylene fibre: 1-3 part
Calcium stearate: 0.2-0.4 part
Sintering shale brick powder: 0.5-2.0 part
Hydrogen peroxide: 6-8 part
Water: 50-80 part.
2. ultralight foamed concrete according to claim 1, is characterized in that, described ordinary Portland cement is 52.5 grades of ordinary Portland cements; Described quick hardening sulphoaluminate cement is 42.5 grades of quick hardening sulphoaluminate cements.
3. ultralight foamed concrete according to claim 1, is characterized in that, described concrete mixing plant mud obtains after drying by flocculent precipitate 105-110 in concrete stirring station sedimentation basin DEG C, and the specific surface area of concrete mixing plant mud is 800-1100m 2/ kg.
4. ultralight foamed concrete according to claim 1, is characterized in that, described polycarboxylate water-reducer is ethers polycarboxylic acid water reducing agent, and solid content is 20%.
5. ultralight foamed concrete according to claim 1, is characterized in that, described redispersable latex powder is Vinyl Acetate Copolymer-ethylene copolymer latex powder.
6. ultralight foamed concrete according to claim 1, is characterized in that, the viscosity of described hydroxypropyl methyl cellulose ether is 100,000 Pa 〃 s.
7. ultralight foamed concrete according to claim 1, is characterized in that, described polypropylene fibre is polypropylene monofil cut staple.
8. ultralight foamed concrete according to claim 1, is characterized in that, described sintering shale brick powder be sintering shale brick after crushed cross 75 tm screen obtain.
9. ultralight foamed concrete according to claim 1, is characterized in that, the mass concentration of described hydrogen peroxide is 30%; Described water is tap water, and during use tap water, summer need not heat, and needs winter to ensure that water temperature is 20-30 DEG C.
10. a preparation method for ultralight foamed concrete as claimed in claim 1, is characterized in that, comprising:
1) ordinary Portland cement, quick hardening sulphoaluminate cement, polycarboxylate water-reducer, redispersable latex powder, hydroxypropyl methyl cellulose ether, polypropylene fibre, calcium stearate and sintering shale brick powder is got, stirring and evenly mixing, add water again, stir after forming flow-like slurry stand-by, twice is stirred instrument is forced mixer, and each churning time is 30 seconds;
2) concrete mixing plant mud being joined 1) in the flow-like slurry that obtains, forced mixer stirs 60 seconds, obtains slurry;
3) hydrogen peroxide being joined 2) in the slurry that obtains, high speed agitator stirs 15-30 second, starts to be formed, obtain mixture to bubble;
4) by 3) mixture that obtains be poured into normal temperature in mould leave standstill 1d after form removal or be poured in materials for wall cavity, be then placed on maintenance 28d under normal temperature laboratory, obtain ultralight foamed concrete.
CN201510999989.6A 2015-12-28 2015-12-28 A kind of ultralight foam concrete and preparation method thereof Active CN105541384B (en)

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CN106186744A (en) * 2016-07-01 2016-12-07 卓达新材料科技集团威海股份有限公司 A kind of novel morning strong foam cement
CN106985277A (en) * 2017-04-29 2017-07-28 吉林建筑大学 A kind of accurate preparation method of celluar concrete prefabricated components
CN107324735A (en) * 2017-07-13 2017-11-07 重庆大学 A kind of ultralight foam concrete and preparation method thereof
CN108863235A (en) * 2018-07-27 2018-11-23 锦州宇博保温建材有限公司 Foam concrete self-heat preservation outer wall building block
CN109400100A (en) * 2017-02-19 2019-03-01 钟钰 A kind of manufacturing method of cement base bubble partition board
CN109734401A (en) * 2019-03-13 2019-05-10 浙江工业大学 A kind of air-entrained concrete building block and preparation method thereof prepared using iron tailings as raw material
CN109928774A (en) * 2019-04-30 2019-06-25 嵊州市金龙混凝土有限公司 A kind of regeneration concrete
CN110156406A (en) * 2019-06-28 2019-08-23 广西科技大学 Utilize the method for discarded sintering shale brick powder production brick powder concrete
CN110386796A (en) * 2019-08-01 2019-10-29 江苏建鸿环保材料科技有限公司 A kind of A grades of heat preservation board raw material, A grades of insulation boards and preparation method
CN112209641A (en) * 2020-10-29 2021-01-12 陇南祁连山水泥有限公司 Method for preparing cement by using waste sintered shale
CN112321222A (en) * 2020-10-12 2021-02-05 绍兴文理学院 Ultrahigh-performance concrete prepared from tap water plant sludge powder
CN112341241A (en) * 2020-11-30 2021-02-09 浙江开元新型墙体材料有限公司 Ultra-low dry density autoclaved aerated concrete and production method thereof
CN112521112A (en) * 2020-12-02 2021-03-19 中国十九冶集团有限公司 Low-density foam concrete and preparation method thereof
CN114213075A (en) * 2021-11-10 2022-03-22 广州大学 Recycled brick powder foam concrete prepared by slurry substitution method and preparation method thereof

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Publication number Priority date Publication date Assignee Title
CN106186744A (en) * 2016-07-01 2016-12-07 卓达新材料科技集团威海股份有限公司 A kind of novel morning strong foam cement
CN109400100A (en) * 2017-02-19 2019-03-01 钟钰 A kind of manufacturing method of cement base bubble partition board
CN106985277A (en) * 2017-04-29 2017-07-28 吉林建筑大学 A kind of accurate preparation method of celluar concrete prefabricated components
CN107324735A (en) * 2017-07-13 2017-11-07 重庆大学 A kind of ultralight foam concrete and preparation method thereof
CN107324735B (en) * 2017-07-13 2020-01-03 重庆大学 Ultra-light foam concrete and preparation method thereof
CN108863235A (en) * 2018-07-27 2018-11-23 锦州宇博保温建材有限公司 Foam concrete self-heat preservation outer wall building block
CN109734401A (en) * 2019-03-13 2019-05-10 浙江工业大学 A kind of air-entrained concrete building block and preparation method thereof prepared using iron tailings as raw material
CN109928774A (en) * 2019-04-30 2019-06-25 嵊州市金龙混凝土有限公司 A kind of regeneration concrete
CN110156406B (en) * 2019-06-28 2021-10-22 广西科技大学 Method for manufacturing brick powder concrete by using waste sintered shale brick powder
CN110156406A (en) * 2019-06-28 2019-08-23 广西科技大学 Utilize the method for discarded sintering shale brick powder production brick powder concrete
CN110386796A (en) * 2019-08-01 2019-10-29 江苏建鸿环保材料科技有限公司 A kind of A grades of heat preservation board raw material, A grades of insulation boards and preparation method
CN112321222A (en) * 2020-10-12 2021-02-05 绍兴文理学院 Ultrahigh-performance concrete prepared from tap water plant sludge powder
CN112209641A (en) * 2020-10-29 2021-01-12 陇南祁连山水泥有限公司 Method for preparing cement by using waste sintered shale
CN112341241A (en) * 2020-11-30 2021-02-09 浙江开元新型墙体材料有限公司 Ultra-low dry density autoclaved aerated concrete and production method thereof
CN112521112A (en) * 2020-12-02 2021-03-19 中国十九冶集团有限公司 Low-density foam concrete and preparation method thereof
CN114213075A (en) * 2021-11-10 2022-03-22 广州大学 Recycled brick powder foam concrete prepared by slurry substitution method and preparation method thereof

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