CN102010166B - Method for preparing micro expanded inorganic heat insulation mortar - Google Patents

Method for preparing micro expanded inorganic heat insulation mortar Download PDF

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Publication number
CN102010166B
CN102010166B CN201010548815A CN201010548815A CN102010166B CN 102010166 B CN102010166 B CN 102010166B CN 201010548815 A CN201010548815 A CN 201010548815A CN 201010548815 A CN201010548815 A CN 201010548815A CN 102010166 B CN102010166 B CN 102010166B
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insulation mortar
mortar
thermal insulation
heat
water
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CN102010166A (en
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熊凤鸣
贾兴文
周俊
王智
康毅
熊永林
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CHONGQING SIBEIKEN ENERGY-SAVING TECHNOLOGY DEVELOPMENT CO LTD
Chongqing University
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CHONGQING SIBEIKEN ENERGY-SAVING TECHNOLOGY DEVELOPMENT 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
    • C04B28/04Portland cements
    • 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 method for preparing micro expanded inorganic heat insulation mortar. Materials such as common silicate cement, desulfuration ash, calcium carbonate powder, re-dispersible latex powder, hydroxypropyl methyl cellulose ether, wood fiber, polypropylene fiber, surfactant, foam stabilizer, water, vitrified micro bubbles and the like are adopted; and the mortar is obtained by adopting the steps of stirring, mixing, shaping, curing and the like. The method has the advantages of low cost, early micro expansion, low later linear shrinkage rate, fire resistance, durability and the like, is easy to construct, and achieves good effect of preparing the I-type building heat insulation mortar by using the III-class vitrified micro bubbles.

Description

A kind of microdilatancy inorganic heat insulation mortar preparation method
Technical field
The invention belongs to the building energy-saving heat-insulating material technical field, be specifically related to a kind of inorganic heat insulation mortar class material that is used for external wall.
Background technology
The building enclosure insulation is divided into external thermal insulation system and exterior wall internal insulation system usually, and at present, new building mainly adopts External Thermal Insulation System.External Thermal Insulation System mainly contains following 4 types: polyurethane external wall heat insulation system, expansion vitrification bead heat-preserving mortar building heat insulation system are steeped in glue powder polyphenyl granule exterior wall outer heat preservation system, expansion polyphenyl plate thinly plastered external insulation system of outer wall, existing eruption.
Glue powder polyphenyl particle is made up of rubber powder material, granular polystyrene light-weight aggregate and cement premixing, and on-the-spot blunge can use, and its heat-insulating property is better, and construction is simple.But the working-yard adopts two component forms to be difficult to controlling quality, and the adhesive polystyrene granule heat-insulating mortar water tolerance is relatively poor, and the thermal property of thermal insulation mortar obviously reduces behind the chance water; And the granular polystyrene unstable properties, be affected by thermal expansion and contraction, yielding, easy of crack even come off when adhesive polystyrene granule heat-insulating mortar is used for external wall outer insulation, actual service life is shorter, is difficult to reach the design service life in 25 years.In addition, granular polystyrene density is very little, when the weather construction that wind is arranged, also can cause serious environmental to pollute.Therefore, a lot of areas have banned use of adhesive polystyrene granule heat-insulating mortar as wall heat insulation material.
The expansion polyphenyl plate thinly plastered external insulation system of outer wall has superior thermal and insulating performance, excellent water tolerance can and resistance to compression, shock resistance, can effectively solve the be full of cracks and the leakage problems of body of wall.This system can avoid producing heat bridge, significantly reduces indoor heat energy through the exterior wall loss, and energy-saving effect is obvious, the disadvantageous effect that also can avoid expansion polyphenyl granule heat-insulating mortar wet trade to bring simultaneously.But operation is comparatively loaded down with trivial details during this system construction, and construction technology is comparatively complicated, and the styrofoam seam crossing is easy to generate seepage, thereby causes the heat-insulation system thermal property to descend.
Existing eruption is steeped the polyurethane external wall heat insulation system and is had waterproof thermal-insulated function, and polyurathamc is the polymer thermosetting polymer, and its thermal conductivity is 0.025 ~ 0.035W/ (mK); Take polyurethane coating technology; Because hard foam spraying polyurethane and materials for wall cohesive strength height, need not any tackiness agent and anchoring piece, can form the successive thermal insulation layer; Guaranteed the acting in conjunction of lagging material and body of wall and effectively blocked heat bridge, the thermal property of also effectively having avoided seepage to cause simultaneously reduces.
Above-mentioned 3 kinds of heat-insulation systems have the excellent insulating performance, thereby are widely used in the external wall outer insulation of all kinds of buildings, but these 3 kinds of heat-insulation systems all belong to the organic materials heat-insulation system, aspect fire resistance, have birth defect.On February 9th, 2009 central television station cultural center; February 20 Guangzhou Fu Licheng; The new China Science and Technology Hall in Beijing on April 6; April 19 was encircled mansion in 50 layers in Nanjing, and big fire occurs for polyphenylene heat insulation slab or polyurathamc because of igniting in succession, caused enormous economic loss; Also caused the query of various circles of society to organic heat-insulating system applies securities such as expansion polyphenyl plate thinly plastered external insulation system of outer wall, existing eruption bubble polyurethane external wall heat insulations thus, these two kinds of heat-insulation systems have clearly been forbidden in public building even covil construction, using in some areas." the covil construction outer heat preservation system and the decoration of exterior wall fire prevention temporary provisions " of the Ministry of Public Security, house and town and country construction cloth promulgated by the ministries or commissions of the Central Government have been made new requirement to the fire safety problem of building heat preservation; The fire resistance of building heat preservation is guaranteed in these new technical requirementss; But increase the difficulty of construction and the cost of engineering largely, to a certain degree limit the application of organic heat-insulating system.
Under above-mentioned background, a lot of provinces and cities begin to widely popularize wall self-insulation and inorganic heat insulation mortar.In inorganic heat insulation mortar, using more at present is the thermal insulation mortar that utilizes glass bead and prepared by pearlite, and especially expansion vitrification bead heat-preserving mortar exterior wall heat insulation system begins to be applied in a lot of provinces and cities.Glass bead is the particulate state non-metallic minerals light heat-insulating material with inner porous, glomeration body that is formed through fragmentation, screening, the vitreous of the instantaneous roasting after of high temperature by vitreous slags such as pitchstones.High-performances such as glass bead has that lightweight, thermal conductivity are little, waterproof, high-low temperature resistant, physicochemical property are stable.The tap density of glass bead is generally 80 ~ 160kg/m 3, thermal conductivity is generally 0.035 ~ 0.070 W/ (mK), and along with the increase of tap density, thermal conductivity also increases gradually.The expansion vitrification bead heat-preserving mortar is aggregate with the expanded and vitrified small ball; Wherein add materials such as cement, Mierocrystalline cellulose and latex powder; On-the-spot only the need whitewashed into heat-insulation system behind the adding suitable quantity of water mix; Have that heat insulation, insulation, easy construction, resistance to compression and cohesive strength are high, weather resistance is good, waterproof, do not burn, meet high temperature and can not distribute characteristics such as volatile gases, be suitable as very much the construction wall lagging material.
In the glass bead production process; Usually employing prolongs warm up time, improves the vitreous rate that the mode of burning the temperature that expands improves glass bead; Thereby make glass bead have higher closed-cell porosity and lower volume water absorption rate; The mode that perhaps adopts hydrophobic to handle reduces the volume water absorption rate of glass bead, so just can prepare the thermal insulation mortar that satisfies the building energy conservation requirement.According to national building material industry standard " expanded and vitrified small ball " (JC/T 1042-2007), the glass bead that existing market is sold is mainly the III class, and tap density is 120 ~ 160kg/m 3, some in addition higher, and the volume water absorption rate has also surpassed 45% the upper limit of building material industry standard regulation.Along with the increase of glass bead tap density and volume water absorption rate, the dry density of kervit microbead insulated sand slurry also can significantly increase.With tap density 120 ~ 160kg/m 3, volume water absorption rate 50% glass bead, under the prerequisite that satisfies the casting requirement, the dry density of the kervit microbead insulated sand slurry of preparing is generally 350 ~ 400kg/m 3, thermal conductivity is greater than 0.12W/ (mK), and the mass output rate ratio of the apparent volume of kervit microbead insulated sand slurry mixture (the glass bead particulate stacking volume with) is lower than 70% especially.According to the regulation of national standard " building heat-insulating mortar " (GB/T 20473-2006), the thermal conductivity of I type building heat-insulating mortar is answered≤0.070W/ (mK), and the thermal conductivity of II type building heat-insulating mortar is answered≤0.085W/ (mK).Therefore, utilize the glass bead of selling in the market can't prepare thermal conductivity and satisfy the building heat-insulating mortar that national standard requires.So some researchists adopt glass bead surface hydrophobic technology to reduce its volume water absorption rate, reduce the dry density and the thermal conductivity of thermal insulation mortar.But surperficial hydrophobic technology is still immature at present; And feasibility is relatively poor; Can't solve the still very high common fault of the high and broken back water-intake rate of percentage of damage in the glass bead mix process effectively, cause the hydrophobic process failure, thermal insulation mortar dry density and thermal conductivity are enlarged markedly.In addition, adopt wet work during the kervit microbead insulated sand slurry construction, influence the environment of working-yard, and can produce bigger dry shrinkage behind the wall on the mortar, cause thermal insulation mortar to produce the crack, make the easy seepage of moisture, cause the heat-insulation system thermal property to descend.
So how to adopt lower cost to make various aspects of performance, the better building insulating layer of fire performance particularly, becoming this area has a difficult problem to be solved.
Summary of the invention
To the deficiency of above-mentioned prior art, the primary technical problem that solves of the present invention is, provide a kind of cost lower, be easy to construct, early stage microdilatancy, later stage linear shrinkage ratio are low, the high-strength light inorganic heat insulation mortar of resistivity against fire and good endurance.
In order to solve the problems of the technologies described above, adopted following technical scheme among the present invention:
A kind of microdilatancy inorganic heat insulation mortar preparation method, its characteristics are, have adopted the material of following proportioning ratio:
Ordinary Portland cement: 600 ~ 800kg
Desulfurized ash: 100 ~ 300kg
Dry powder: 50 ~ 100kg
Redispersable latex powder: 15 ~ 20kg
Hydroxypropyl methyl cellulose ether: 3 ~ 8kg
Wood fibre: 3 ~ 6kg
Polypropylene fibre: 2 ~ 5kg
Tensio-active agent: 6 ~ 16kg
Suds-stabilizing agent: 1 ~ 2.5kg
Water: 600 ~ 1200kg
Glass bead: 6 ~ 12m 3
The employing following steps make: a, the silicate cement with the said ratio ratio, desulfurized ash, dry powder, redispersable latex powder, hydroxypropyl methyl cellulose ether, wood fibre and polypropylene fibre mix, and be for use behind the water stirring formation flow-like slurry of adding part ratio; B, with the tensio-active agent and the suds-stabilizing agent of said ratio ratio, add water according to 20 ~ 30 times of weighings of tensio-active agent quality, being stirred to bubble, to form the back in a large number for use; C, the mixture that a step and b step are obtained mix and stir, and the glass bead that adds said proportioning ratio then stirs, and forms the thermal insulation mortar slip of good fluidity; D, the thermal insulation mortar slip casting that the c step is obtained or spurt in the mould obtains.The thermal insulation mortar that obtains like this has the microdilatancy characteristic.Desulfurized ash is as expansion component, can guarantee that inorganic heat insulation mortar has early stage microdilatancy, characteristic that the later stage linear shrinkage ratio is low.Tensio-active agent be spiked into have thickening in the thermal insulation mortar, lubricated effect, can reduce the breakage rate of glass bead in the mix process effectively.
In the present technique scheme, ordinary Portland cement mainly is as gelatinous material, preferentially adopts 42.5 grades of ordinary Portland cements to make better effects if.Described desulfurized ash is meant the circulating fluid bed boiler desulfurization ash, and its staple is chainotte matter mineral, alpha-quartz, free calcium oxide and II-CaSO 4In the present technique scheme; Adopting desulfurized ash, is the hydraulicity and the micro-expansibility in order to utilize desulfurized ash, can improve thermal insulation mortar 28d ultimate compression strength effectively; Can significantly reduce simultaneously the linear shrinkage ratio of thermal insulation mortar; Along with the increase of desulfurized ash volume, linear shrinkage ratio also reduces gradually, helps improving the splitting resistance of thermal insulation mortar.Said dry powder is a heavy calcium carbonate powder, adopts dry powder can play raising here and newly mixes the mobile effect of thermal insulation mortar.Said redispersable latex powder is water-soluble redispersible powder, is a kind ofly can strengthen thermal insulation mortar force of cohesion, bonding force and flexible organic gel gel material.Said hydroxypropyl methyl cellulose ether has another name called Mierocrystalline cellulose hydroxypropylmethyl ether, is used for can playing the effect of remarkable enhancing thermal insulation mortar cohesiveness, water-retentivity, thickening property and stability here.Said wood fibre is meant that timber through the organic wadding fibrous material of handling and processing obtains, is used for here, can play to strengthen thermal insulation mortar splitting resistance and the effect that improves denseness.Said polypropylene fibre is used for can playing the folding strength that improves thermal insulation mortar here, strengthens the effect of the splitting resistance of thermal insulation mortar.Said tensio-active agent is meant to form the adsorption sector facial mask, reduces capillary material; The preferred non-ionics that adopts in the present technique scheme; Non-ionics has wetting and dissemination, and can catch a large amount of air when in water-cementitious material system, stirring, the gelling material slurry is stirred after; Form the great water-air filled cavity of air content-cementitious material system; Because water-air filled cavity has good ball lubrication, significantly reduces the breakage rate of glass bead in the mix process, and significantly shortens the vitrification micropearl morttar churning time; Make vitrification micropearl morttar stir the back and just can form the fabulous light mortar system that is similar to little foam of rheological, make thermal insulation mortar moulding more easily through the short period of time.Simultaneously the dispersion water-reduction of tensio-active agent also guarantee fine powder materials such as latex powder, wood fibre more easy and uniform be dispersed in the kervit microbead insulated sand slurry system; And make the lubricated and parcel glass bead that slurry can be good; Improve the mechanical property and the water tolerance of thermal insulation mortar, reduced the water-intake rate of thermal insulation mortar.In the technical scheme, suds-stabilizing agent is used to improve bubble stability and prolongs the bubble-break cycle, makes that the thermal insulation layer internal void that generates is more, reduces its dry density and thermal conductivity.Utilize tensio-active agent and suds-stabilizing agent can make the mass output rate of kervit microbead insulated sand slurry bring up to 1.1 ~ 1.2.
Simultaneously, in a step of present technique scheme, generally adopt the forced mixer dry mixing that powder material was mixed.Said " water that adds the part ratio " is meant that specifically the water the inside that adds said proportioning ratio total amount deducts the proportional after the adding water yield among the step b.After adding entry, generally stir after 30 seconds and can form the flow-like slurry.In the b step of present technique scheme, the tensio-active agent of adding and suds-stabilizing agent be because amount is fewer, can adopt to add behind the projection electronic weighing of weighing precision 0.1g to make its deal accurate.Described " bubble forms in a large number " is meant that bubble formation speed reaches the highest moment.Preferably adopt high speed agitator to stir after 120 ~ 180 seconds during concrete the stirring, its bubble is formed in a large number, can shorten churning time like this.In the c step, after the mixture that a step and b step are obtained mixes, generally stir and to make it even in 30 seconds, add general the stirring 60 seconds behind the glass bead, can form good thermal insulation mortar slip.Generally speaking, after the thermal insulation mortar slip casting was in the mould, leaving standstill after 1 day at normal temperatures was collapsible die in the d step; After the form removal, thermal insulation mortar is placed on maintenance gets final product under the normal temperature laboratory.
When the present invention implements, need not to adopt special whipping device and preparation of construction, easy construction; Material cost is low, and the glass bead breakage rate is low, and the thermal insulation mortar mass output rate is up to 1.1 ~ 1.2; And the thermal insulation mortar after the sclerosis has the microdilatancy characteristic in early days; And dried linear shrinkage ratio of later stage is extremely low, is merely 10% ~ 20% of national standard " building heat-insulating mortar " (GB/T 20473-2006) limit value, and splitting resistance is good.When the present invention is used for external wall outer insulation; Construction technology in conjunction with conventional can meet the demands; Insulation layer thickness only needs 2 ~ 3cm, and the bonding strength of basic units such as thermal insulation mortar and concrete, shale brick, building block, stone material is higher, qualitative problems of construction such as not being prone to hollowing, ftractureing and coming off.
In sum, the present invention mainly possesses following advantage:
(1) the used main gelling material of the present invention is an ordinary Portland cement, utilizes the industrial solid castoff desulfurized ash as adulterant in addition, used starting material wide material sources, cheap, so the thermal insulation mortar raw materials cost is low, easy to utilize; Utilize the thermal insulation mortar of glass bead preparation, have the advantage that incendivity is low, fire resistance rating is high, chance high temperature can not distribute volatile gases and toxic and harmful.
Can catch a large amount of air when the tensio-active agent that (2) adopts stirs in water, thereby reduce the dry density of thermal insulation mortar effectively, make kervit microbead insulated sand slurry have good heat-insulating property, dry density is lower than 300kg/m 3, thermal conductivity is lower than 0.070 W/ (mK), and ultimate compression strength is higher than 0.6MPa.
(3) tensio-active agent has good ball lubrication through the water-air filled cavity-cementitious material system that stirs back formation in water; Can significantly reduce the breakage rate of glass bead in the mix process, the mass output rate of the kervit microbead insulated sand slurry ratio of the apparent volume of kervit microbead insulated sand slurry mixture (the glass bead particulate stacking volume with) brings up to 1.1 ~ 1.2.After the glass bead breakage rate reduces, can significantly improve the parameters in series such as dry density and thermal conductivity of thermal insulation mortar.
(4) after the admixture desulfurized ash; Utilize the anhydrite that contains in the desulfurized ash when sclerosis, to have the characteristics of microdilatancy; Make thermal insulation mortar also have the characteristics of microdilatancy during length of time morning, and the drying shrinkage value in later stage obviously reduce, along with the raising of desulfurized ash volume; Thermal insulation mortar 28d helps to improve the splitting resistance of thermal insulation mortar during the length of time even can microdilatancy.In addition, because desulfurized ash has certain hydraulicity, help to improve the later strength of thermal insulation mortar during as adulterant.In the thermal insulation mortar after the admixture desulfurized ash, the 28d and the ultimate compression strength in 90d length of time are compared with the thermal insulation mortar of admixture desulfurized ash not can improve 10% ~ 20%.The feasible thermal insulation mortar good endurance that makes.
(5) through additives such as admixture redispersable latex powder, methylhydroxypropylcellulose ether, wood fibres, can significantly improve the rheological of thermal insulation mortar, improve the intensity and the water tolerance of thermal insulation mortar, and help to reduce the water-intake rate of thermal insulation mortar.The admixture polypropylene fibre helps to improve the folding strength of thermal insulation mortar, improves the splitting resistance of thermal insulation mortar.
(6) through overtesting, the thermal insulation mortar that the present invention makes, ultimate compression strength can reach 0.6 ~ 1.0MPa, and folding strength can reach 0.3 ~ 0.4MPa, and dry density is lower than 300 kg/m 3, be a kind of thermal insulation layer of high-strength light.
When (7) the present invention implemented, each concrete steps remained ordinary process, is highly susceptible to building operation.
(8) simultaneously, through verification experimental verification, when the present invention implements, can adopt tap density greater than 120kg/m 3The III class glass bead glass bead of common sale (in the market), adopt common process, prepare dry density less than 300kg/m 3, thermal conductivity≤0.070W/ (mK) I type building heat-insulating mortar, and the prescribed value of thermal insulation mortar linear shrinkage ratio this index in the national standard " building heat-insulating mortar " (GB/T 20473-2006).Reached the good result of utilizing III class glass bead to prepare I type building heat-insulating mortar.
Embodiment
Below in conjunction with embodiment and experimental verification data the present invention is done further detailed description.
During practical implementation,
Embodiment 1
The volume of material component that adopts in the present embodiment and cooperation ratio thereof is following:
42.5 level ordinary Portland cement: 600kg
Desulfurized ash: 300kg
Dry powder: 77kg
Redispersable latex powder (EVA): 15kg
Hydroxypropyl methyl cellulose ether (HPMC): 3kg
Wood fibre: 3kg
Polypropylene fibre: 2kg
Saponin/TSM non-ionics: 6kg
Dimethyl dodecyl amine oxide suds-stabilizing agent: 1kg
Water: 600kg
Glass bead: 6m 3
And adopt and to be prepared as follows step and to make: a, the silicate cement with the said ratio ratio, desulfurized ash, dry powder, redispersable latex powder, hydroxypropyl methyl cellulose ether, wood fibre and polypropylene fibre mix, the water that adds the part ratio stir form behind the flow-like slurry for use; B, with the tensio-active agent and the suds-stabilizing agent of said ratio ratio, add water according to 20 ~ 30 times of weighings of tensio-active agent quality, being stirred to bubble, to form the back in a large number for use; C, the mixture that a step and b step are obtained mix and stir, and the glass bead that adds said proportioning ratio then stirs, and forms the thermal insulation mortar slip of good fluidity; D, the thermal insulation mortar slip casting that the c step is obtained or spurt in the mould obtains.
Embodiment 2
The volume of material component that adopts in the present embodiment and cooperation ratio thereof is following:
42.5 level ordinary Portland cement: 700kg
Desulfurized ash: 225kg
Dry powder: 50kg
Redispersable latex powder (EVA): 15kg
Hydroxypropyl methyl cellulose ether (HPMC): 4kg
Wood fibre: 3kg
Polypropylene fibre: 3kg
Saponin/TSM non-ionics: 8kg
Dimethyl dodecyl amine oxide suds-stabilizing agent: 1.5kg
Water: 900kg
Glass bead: 8m3
Concrete preparation process is identical with embodiment 1 in the present embodiment.
Embodiment 3
The volume of material component that adopts in the present embodiment and cooperation ratio thereof is following:
42.5 level ordinary Portland cement: 700kg
Desulfurized ash: 170kg
Dry powder: 100kg
Redispersable latex powder (EVA): 18kg
Hydroxypropyl methyl cellulose ether (HPMC): 5kg
Wood fibre: 4kg
Polypropylene fibre: 3kg
Saponin/TSM non-ionics: 7kg
Dimethyl dodecyl amine oxide suds-stabilizing agent: 1.5kg
Water: 1100kg
Glass bead: 10m 3
Concrete preparation process is identical with embodiment 1 in the present embodiment.
Embodiment 4
The volume of material component that adopts in the present embodiment and cooperation ratio thereof is following:
42.5 level ordinary Portland cement: 800kg
Desulfurized ash: 100kg
Dry powder: 65kg
Redispersable latex powder (EVA): 20kg
Hydroxypropyl methyl cellulose ether (HPMC): 6kg
Wood fibre: 5kg
Polypropylene fibre: 4kg
Saponin/TSM non-ionics: 10kg
Dimethyl dodecyl amine oxide suds-stabilizing agent: 2kg
Water: 1100kg
Glass bead: 10m 3
Concrete preparation process is identical with embodiment 1 in the present embodiment.
Embodiment 5
The volume of material component that adopts in the present embodiment and cooperation ratio thereof is following:
42.5 level ordinary Portland cement: 800kg
Desulfurized ash: 111kg
Dry powder: 50kg
Redispersable latex powder (EVA): 20kg
Hydroxypropyl methyl cellulose ether (HPMC): 8kg
Wood fibre: 6kg
Polypropylene fibre: 5kg
Saponin/TSM non-ionics: 12kg
Dimethyl dodecyl amine oxide suds-stabilizing agent: 2.5kg
Water: 1200kg
Glass bead: 12m 3
Concrete preparation process is identical with embodiment 1 in the present embodiment.
Experimental result
Embodiment 1, embodiment 3 and embodiment 5 are made shaping test piece according to the requirement of national standard " building heat-insulating mortar " (GB/T20473-2006), test mechanical property, thermal conductivity and dry shrinkage.Experimental technique and result are following:
1) mensuration of the folding strength of test specimen and ultimate compression strength is with reference to " building mortar basic performance tests method " (JGJ70-2009), and test-results is seen table 1.
Mechanical property/the MPa of table 1 kervit microbead insulated sand slurry
2) linear shrinkage ratio of kervit microbead insulated sand slurry is measured with reference to " building mortar basic performance tests method " (JGJ70-2009), and test-results is seen table 2.
The linear shrinkage ratio of table 2 kervit microbead insulated sand slurry (%)
The length of time 3d 7d 14d 28d
Embodiment 1 0.003 -0.006 -0.020 -0.031
Embodiment 3 0.003 -0.008 -0.029 -0.037
Embodiment 5 0.001 -0.015 -0.027 -0.050
Annotate: negative value is a shrinkage value, on the occasion of being swell value; National standard " building heat-insulating mortar " (GB/T20473-2006) regulation thermal insulation mortar linear shrinkage ratio peak should be greater than 0.3%.
3) dry density of kervit microbead insulated sand slurry and thermal conductivity are measured with reference to " building heat-insulating mortar " (GB/T20473-2006), and test-results is seen table 3.
The dry density of table 3 kervit microbead insulated sand slurry and thermal conductivity
Embodiment Dry density (kg/m 3) Thermal conductivity (W/ (mK))
1 296 0.069
3 265 0.066
5 240 0.064
Can find out that according to above testing data the kervit microbead insulated sand slurry that the present invention relates to satisfies the performance requriements of I type building heat-insulating mortar in the national standard " building heat-insulating mortar " (GB/T20473-2006), dry density is 240~300kg/m 3, 28d ultimate compression strength Schwellenwert is 0.60MPa, and the ultimate compression strength that surpasses the I type building heat-insulating mortar of national Specification should be greater than the requirement of 0.2MPa, and thermal conductivity is also less than 0.070 W/ (mK).And; 0.3% the peak that the kervit microbead insulated sand slurry linear shrinkage ratio that the present invention relates to requires much smaller than national standard, along with the increase of desulfurized ash volume, linear shrinkage ratio can be low to moderate 0.02%; Explain that splitting resistance of the present invention is fine; Be difficult in actual use producing the dry shrinkage crack, help to improve the heat-insulating property of thermal insulation mortar, avoided thermal insulation mortar in use to produce the risk that seepage causes heat-insulating property obviously to descend because of cracking.
Wherein the thermal conductivity of embodiment 5 is minimum, and thermal property is best, is suitable for heat-insulating property is required high building; Embodiment 1 mechanical property is best, and early strength is also best, helps to accelerate speed of application; Embodiment 3 economy are best, and its mechanical property, thermal property are very good, can be used as the optimum mix of actual production.

Claims (1)

1. a microdilatancy inorganic heat insulation mortar preparation method is characterized in that, has adopted the material of following proportioning:
Ordinary Portland cement: 600 ~ 800kg
Desulfurized ash: 100 ~ 300kg
Dry powder: 50 ~ 100kg
Redispersable latex powder: 15 ~ 20kg
Hydroxypropyl methyl cellulose ether: 3 ~ 8kg
Wood fibre: 3 ~ 6kg
Polypropylene fibre: 2 ~ 5kg
Tensio-active agent: 6 ~ 16kg
Suds-stabilizing agent: 1 ~ 2.5kg
Water: 600 ~ 1200kg
Glass bead: 6 ~ 12m 3
The employing following steps make: a, the ordinary Portland cement with said ratio, desulfurized ash, dry powder, redispersable latex powder, hydroxypropyl methyl cellulose ether, wood fibre and polypropylene fibre mix; For use behind the water stirring formation flow-like slurry of adding part ratio; Described desulfurized ash is meant the circulating fluid bed boiler desulfurization ash, and its staple is chainotte matter mineral, alpha-quartz, free calcium oxide and II-CaSO 4B, with the tensio-active agent and the suds-stabilizing agent of said ratio, add water according to 20 ~ 30 times of weighings of tensio-active agent quality, being stirred to bubble, to form the back in a large number for use; C, the mixture that a step and b step are obtained mix and stir, and the glass bead that adds said proportioning then stirs, and forms the thermal insulation mortar slip of good fluidity; D, the thermal insulation mortar slip casting that the c step is obtained or spurt in the mould obtains.
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