CN102815906A - Dual organic modified cement-base expanded perlite fireproof thermal-insulation board and preparation method thereof - Google Patents
Dual organic modified cement-base expanded perlite fireproof thermal-insulation board and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a dual organic modified cement-base expanded perlite fireproof thermal-insulation board and a preparation method thereof. The dual organic modified cement-base expanded perlite fireproof thermal-insulation board mainly comprises the following components in percentage by weight: 50-80% of organic modified expanded perlite, 20-35% of Portland cement, 5-10% of polymer emulsion, 0-3% of active filler and 0.5-1% of additive. The preparation method comprises the following steps: evenly mixing raw materials, adding water, stirring to obtain a semidry material, filling the semidry material into a mold, compacting into a fireproof thermal-insulation board, and finally, carrying out high temperature steam curing for several hours. The dual organic modified cement-base expanded perlite fireproof thermal-insulation board not only has the advantages of strong deformation resistance, favorable crack resistance, shock resistance, favorable weather resistance, long service life, favorable fire resistance (Grade A) and the like in the Portland cement-base expanded perlite inorganic thermal-insulation board, but also has the advantages of high strength, low density and low elastic modulus. The invention has the characteristic of high production efficiency, and can implement large-scale production.
Description
Technical field
The invention belongs to pearlstone fireproof heated board and preparation field thereof, particularly a kind of dual organically-modified cement based pearlstone fireproof heated board and preparation method thereof.
Background technology
In recent years, the domestic architectural exterior insulation material fire that takes place in succession causes serious loss of life and personal injury and property damage.Inflammable flammable architectural exterior insulation material has become one type of new disaster hidden-trouble, and the fire that causes thus has been the multiple impetus.Therefore, the fire safety problem of external wall outer insulation material has become the focus that fire department is paid close attention to.Now in the building energy-saving heat-insulating material of large-scale application, polystyrene foam plate is because light weight, insulation and thermal insulation are good, becomes the external wall outer insulation material of main flow.But the fire savety of its extreme difference, the defective that is prone to aging, easy firing, combustion gas severe toxicity make polystyrene foam plate progressively withdraw from domestic external wall outer insulation material market.In addition, the fire resistance that domestic a plurality of departments put into effect policy requirements external wall outer insulation material reaches the A level, so the inorganic fire warming plate will become the leading role on the external-wall heat-insulation material market from now on.
All mentioned the warming plate of water glass (water glass)-pearlstone system in the existing multinomial inorganic fire warming plate technology; The water tolerance of water glass is very poor; Easily deliquescence and infiltration even it is carried out hydrophobic modified, also can't guarantee water tolerance and the weathering resistance of the midium or long term of water glass (water glass)-pearlstone architecture heat preservation material; Can influence the thermal conductivity and the intensity of lagging material because making moist the accumulation of salt in the surface soil in the humid area, even have potential safety hazard.Name be called " a kind of preparation method of heat-insulating board for building wall ", application number be 200610076199.1 one Chinese patent application and name to be called " a kind of wall insulating sheet materials, its preparation method and application ", application number be 200710143529.9 one Chinese patent application, the inorganic heat preservation sheet material of a kind of cement-pearlstone system is disclosed respectively.But; What use in the above-mentioned patent all is directly to use normal expanded perlite to make the insulation aggregate; In stirring, moulding and aquation initial stage; The hole of normal expanded perlite can absorb the cement and the moisture of a part, influences the hydration process of the fireproof heated board of cement-pearlstone system, finally has influence on mechanical property, water resistance and the heat-insulating property of fireproof heated board.Therefore, need carry out modification, reduce it cement and absorption of water to pearlstone.
Except the selecting for use of heat preserving aggregate, the technology that above-mentioned patent proposes also has the common defective: rigidity is had a surplus, and elasticity is not enough.There is the reduction of bibliographical information thermal insulation mortar Young's modulus to help to reduce dangerous position principle stress extreme value of composite thermal-insulating wall and heat-insulation mortar bed principle stress average under the Xia Redong cryogenic region weather condition; Also can reduce the bond stress between the interface; Reduce the danger (" the thermal insulation mortar Young's modulus is to the influence research of composite thermal-insulating wall thermal stress " of interfacial failure; New Building Materials, 2011.3).By means of the model that document proposed, can obtain after the inorganic heat preservation plate calculated with document category like conclusion, promptly the warming plate Young's modulus is more little good more normal span planted agent.In other words, warming plate will have certain elasticity, have alap backfin ratio, not so under the effect of temperature variation, can make warming plate crackle occur easily, is destroyed with binder interface, significantly reduces warming plate work-ing life and building safety.Therefore, need start with, develop dual organically-modified cement based pearlstone fireproof heated board from the elastomeric modification of heat preserving aggregate and two aspects of elastomeric modification of inorganic heat preservation slab integral.
Summary of the invention
Technical problem to be solved of the present invention provides a kind of dual organically-modified cement based pearlstone fireproof heated board and preparation method thereof, and this fireproof heated board non-deformability is strong, and resistance to cleavage is good; Shock-resistant, good weatherability, long service life; And advantage with HS, high stability, low density, low elastic modulus; Having remedied other inorganic heat preservation plate bodys is that elasticity is not enough, and this method production efficiency is high, and is simple to operate.
A kind of dual organically-modified cement based pearlstone fireproof heated board of the present invention; Its main ingredient comprises by weight ratio: organically-modified pearlstone 50 ~ 80%, silicate cement 20 ~ 35%, polymer emulsion 5 ~ 10%, active filler 0 ~ 3%, additive 0.5 ~ 1%.
It is the disclosed polymer modified expanded perlite of Chinese patent of ZL200710070343.5 (CN101139180B) that described organically-modified pearlstone adopts the patent No., and tap density is 40 ~ 100g/L.
The label of described silicate cement is 42.5 or 52.5.
Described polymer emulsion is pure acrylic acid polymer emulsion or polyvinyl acetate polymer emulsion.
Described active filler is through silex powder materials such as the flyash of 800～1500 mesh sieves choosing, silicon powders.
Described additive is one or more of high efficiency water reducing agent, hydrophober, hardening accelerator, water-holding agent, polypropene staple.
The preparation method of a kind of dual organically-modified cement based pearlstone fireproof heated board of the present invention comprises:
With each raw materials mix evenly after, add entry, obtain half-dried material through stirring, insert then in the mould, be pressed into fireproof heated board again, after the high-temperature steam curing maintenance get final product.
The add-on of described water and solid siccative weight ratio are 0.6:1 ~ 1:1.
Compression ratio in the described pressing process is 1.5 ~ 2.2.
The condition of described high-temperature steam curing maintenance is 80 ~ 100 ℃ temperature and 95 ~ 100% humidity.
Pearlstone has influence on several main performance index such as dry density, intensity and thermal conductivity of inorganic heat preservation plate as the core heat preserving aggregate of inorganic heat preservation plate.Utilize polymer modification pearlstone later, though its tap density only than the normal expanded perlite 6 ~ 10g/L that rises, its many performances have obtained strengthening greatly than normal expanded perlite.The cited test-results of table 1 has fully proved the meliority of organically-modified pearlstone.At first, after the surface coated organic continuous film, the particle of organically-modified pearlstone can have certain elasticity, had reduced the Young's modulus of heat preserving aggregate itself.If carry out organically-modifiedly to originally just having high-intensity expanded perlite granule, then can obtain resistance to compression and folding strength is higher, the warming plate that the volume water absorption rate is lower.Moreover; Because the expanded perlite granule surface is covered after the organic membrane; Particle surface can change hydrophobicity into by original wetting ability, so in moulding process, avoided moisture is sucked in the hole of pearlstone, makes moisture fully be applied to the hydration process of cement; Thereby can reduce moulding and operation water, reduce ratio of water to material.Inferior person; Because cement slurry can not be inhaled in the hole of organically-modified pearlstone,, finally can reduce the dry density of warming plate so both kept the existence of the inner emptying aperture of heat preserving aggregate; Reduce thermal conductivity; Most of cement slurry is all concentrated between particle and the particle, play the cohesive action of cement conscientiously, thereby improve the mechanical property of warming plate.At last, because organically-modified pearlstone has improved particulate elasticity than normal expanded perlite, the overall flexibility of inorganic heat preservation plate is improved, this can obtain conclusion intuitively from the contrast of backfin than data.From table 1, can see, adopt organically-modified pearlstone to make the inorganic heat preservation plate of insulation aggregate than generally being lower than the employing normal expanded perlite as the backfin of the inorganic heat preservation plate of heat preserving aggregate.
Organically-modified pearlstone of table 1 and normal expanded perlite are done the contrast of warming plate
In order to test the life-time service security of inorganic heat preservation plate, we have also introduced to boil and have boiled test, and this is to utilize extreme case to simulate the method for inorganic heat preservation plate life-time service process at short notice.The inorganic heat preservation plate body that adopts organically-modified pearlstone to make the insulation aggregate has revealed than normal expanded perlite warming plate and water glass-better security of pearlstone system inorganic heat preservation plate and stability.Table 2 has shown to boil between the multiple inorganic heat preservation plate and has boiled mechanics property comparison before and after the 2h.The data of the loss of strength rate of three kinds of inorganic heat preservation plates from table can be seen in relatively; Adopting organically-modified pearlstone is that the decline on the mechanical property was minimum after the inorganic heat preservation plate of heat preserving aggregate boiled through boiling of 2h; The loss of strength rate of ultimate compression strength, folding strength and tensile strength is all little many than other two kinds of inorganic heat preservation plates; In other words, inorganic heat preservation plate of the present invention the security of life-time service and stable aspect more reliable than the inorganic heat preservation plate of the disclosed cement of existing patent-pearlstone system inorganic heat preservation plate and water glass-pearlstone system.
Table 2 boils and boils the mechanical property contrast of the three kinds of inorganic heat preservation plates in 2h front and back
Annotate: numbering 1 is the inorganic heat preservation plate of aggregate for organically-modified pearlstone; Numbering 2 is the existing disclosed cement based pearlstone of patent system inorganic heat preservation plate; Numbering 3 is organically-modified water glass-pearlstone system inorganic heat preservation plate
Adopting organically-modified pearlstone is the first heavily modification to cement based pearlstone system inorganic heat preservation plate as heat preserving aggregate; Also be for can with organic modifiers to the modification of inorganic heat preservation slab integral second the weight organically-modified combining, make to have better switching performance between heat preserving aggregate and the consolidating material.
In cement based pearlstone fireproof heated board, add organic modifiers, can improve the over-all properties of inorganic fire warming plate.The characteristics that polymer emulsion can utilize the polymeric long molecular chain in sheet material, to form continuous elastica strengthen the tensile strength and long-term water tolerance of sheet material, reduce the Young's modulus of sheet material, increase sheet material toughness; Polypropene staple can strengthen bonding tensile strength, folding strength and the rupture strength of fireproof heated board; Ratio of water to material when water reducer can reduce the material stirring, thus wc reduced, strengthen the intensity of fireproof heated board, the water ratio during the control moulding; Hydrophober is that hydrophobically modified is carried out on the fireproof heated board surface, reduces the volume water absorption rate of fireproof heated board in the certain period; The effect of water-holding agent and hardening accelerator is respectively and improves the material denseness, improves to be molded into power and the early strength that strengthens fireproof heated board.And the acting in conjunction through organic modifiers; Cement based pearlstone fireproof heated board can improve the adaptability to changes under the stress; Reduce since the stress concentration that causes in season, temperature loading to the destruction of warming plate and warming plate-binder interface; Prolong the actual service life of inorganic heat preservation plate, reduce the potential safety hazard of practical applications.
Because cement based pearlstone inorganic fire warming plate is carried out dual modified reason; So maintenance stage after the inorganic heat preservation sheet metal forming; Common maintenance means have satisfied not the demand of accomplishing the strength development of cement base inorganic warming plate at short notice, therefore through having selected the scheme of high temperature steam curing after a large amount of experiments.High temperature steam curing, be in temperature near 100 ℃, steam humidity is near under 100% the condition cement base inorganic warming plate being carried out maintenance.High temperature steam curing can be quickened the hydration process of dual organically-modified cement based pearlstone fireproof heated board, significantly reduces the inorganic heat preservation plate and reaches the required time of request for utilization intensity, accelerates the mould turnover, improves the production efficiency of inorganic heat preservation plate.The data presentation of table 3 the inorganic heat preservation plate of dry density 250g/L under different curing conditions, obtain same intensity required time.From table 3, can see, the inorganic heat preservation plate of specification of the same race, under different curing conditions, arriving the needed curing time of identical ultimate compression strength has very big difference.Generally speaking, temperature is high more, and humidity is big more, and needed curing time is short more.The inorganic heat preservation plate of high temperature steam curing only needed 8 hours just can reach the ultimate compression strength that just can reach at least 5 days under the normal temperature maintenance; Production efficiency has obtained significantly promoting; The place demand that the inorganic heat preservation sheetpile is put also significantly reduces; Also accelerated the turnaround speed of mould, production cost is significantly reduced.
The inorganic heat preservation plate of table 3 dry density 250g/L is in the strength development time of different curing conditions
| Curing condition | Reach 0.3MPa | Reach 0.4MPa | Reach 0.5MPa | Reach 0.6MPa |
| High-temperature steam | 1h | 2h | 4h | Several hours |
| Normal temperature, 40% humidity | 24h | 4 several hours | 72h | ≥120h |
| 60 ℃, 60% humidity | 16h | 24h | 36h | 4 several hours |
| 90 ℃, 60% humidity | 4h | Several hours | 11h | 14h |
Annotate: intensity refers to the ultimate compression strength of inorganic heat preservation plate.
Through detecting, the dry density of fireproof heated board of the present invention is less than 300g/L, the minimum 180g/L that reaches; Ultimate compression strength is generally 0.4 ~ 1.5MPa, and tensile strength is 0.10 ~ 0.35MPa, and the backfin ratio is less than 3, and its thermal conductivity is between 0.055 ~ 0.070w/mk, and the volume water absorption rate is less than 10%, and Young's modulus is merely 1GPa.
Inorganic fire warming plate of the present invention through dual organically-modified after; Requirement, fire resistance strong except non-deformability, that resistance to cleavage good, shock-resistant, good weatherability, long service life, its each item performance meet building thermal insulation material reach the advantage that Portland cement base swelling perlite inorganic heat preservation plates such as A level have; The advantage that also has HS, high stability, low density, low elastic modulus has remedied other inorganic heat preservation plate bodys and is that elasticity stress resistance not enough, that temperature loading is caused is not enough, life-time service security and stable insufficient shortcoming.Because adopted the maintenance process of high-temperature steam, dual organically-modified inorganic fire warming plate also has the production efficiency height again, and the little characteristics of floor space are stacked in maintenance.
Beneficial effect:
(1) fireproof heated board of the present invention possessed that the non-deformability that Portland cement base swelling perlite inorganic heat preservation plate had is strong, resistance to cleavage good, advantage such as shock-resistant, good weatherability, long service life;
(2) fireproof heated board of the present invention has the advantage of HS, high stability, low density, low elastic modulus, has remedied other inorganic heat preservation plate bodys and be that elasticity stress resistance not enough, that temperature loading is caused is not enough, life-time service security and stable insufficient shortcoming;
(3) production efficiency of the present invention is high, and maintenance stacking floor space is little.
Embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in the restriction scope of the present invention.Should be understood that in addition those skilled in the art can do various changes or modification to the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Embodiment 1
Take by weighing each raw material by following weight: 52.5 label cement 20kg, tap density is the organically-modified pearlstone 70kg of 80g/L, active filler silicon powder 2kg, polymer emulsion 7.4kg, additive high efficiency water reducing agent 0.6kg; After above-mentioned raw materials mixed, add the water of 60kg, stir into half-dried material, insert in the mould, utilize pressing plate equipment to be pressed into fireproof heated board, after high temperature steam curing in several hours, obtain finished product with 1.8 compression ratio through self-dumping mixer.
Embodiment 2
Take by weighing each raw material by following weight: 52.5 label cement 25kg, tap density is the organically-modified pearlstone 65kg of 75g/L, active filler flyash 1kg, polymer emulsion 9kg, additive hardening accelerator 1kg; After above-mentioned raw materials mixed, add the water of 45kg, stir into half-dried material, insert in the mould, utilize pressing plate equipment to be pressed into fireproof heated board, after high temperature steam curing in several hours, obtain finished product with 2.5 compression ratio through self-dumping mixer.
Embodiment 3
Take by weighing each raw material by following weight: 52.5 label cement 15kg, tap density is the organically-modified pearlstone 80kg of 100g/L, polymer emulsion 4.6kg, additive hydrophober 0.4kg; After above-mentioned raw materials mixed, add the water of 55kg, stir into half-dried material, insert in the mould, utilize pressing plate equipment to be pressed into fireproof heated board, after high temperature steam curing in several hours, obtain finished product with 1.5 compression ratio through self-dumping mixer.
Embodiment 4
Take by weighing each raw material by following weight: 42.5 label cement 30kg, tap density is the organically-modified pearlstone 65kg of 90g/L, active filler flyash 2kg, polymer emulsion 9kg, additive polypropene staple 1kg; After above-mentioned raw materials mixed, add the water of 50kg, stir into half-dried material, insert in the mould, utilize pressing plate equipment to be pressed into fireproof heated board, after high temperature steam curing in several hours, obtain finished product with 1.6 compression ratio through self-dumping mixer.
Embodiment 5
Take by weighing each raw material by following weight: 42.5 label cement 25kg, tap density is the organically-modified pearlstone 70kg of 85g/L, active filler 0, polymer emulsion 7.4kg, additive polypropene staple 0.6kg; After above-mentioned raw materials mixed, add the water of 55kg, stir into half-dried material, insert in the mould, utilize pressing plate equipment to be pressed into fireproof heated board, after high temperature steam curing in several hours, obtain finished product with 1.8 compression ratio through self-dumping mixer.
Embodiment 6
Take by weighing each raw material by following weight: 42.5 label cement 20kg, tap density is the organically-modified pearlstone 72kg of 72g/L, active filler 0, polymer emulsion 5.5kg, additive polypropene staple 0.5kg; After above-mentioned raw materials mixed, add the water of 45kg, stir into half-dried material, insert in the mould, utilize pressing plate equipment to be pressed into fireproof heated board, after high temperature steam curing in several hours, obtain finished product with 2.0 compression ratio through self-dumping mixer.
Embodiment 7
Take by weighing each raw material by following weight: 52.5 label cement 24kg, tap density is the organically-modified pearlstone 70kg of 70g/L, active filler 0, polymer emulsion 5.5kg, additive polypropene staple 0.5kg; After above-mentioned raw materials mixed, add the water of 55kg, stir into half-dried material, insert in the mould, utilize pressing plate equipment to be pressed into fireproof heated board, after high temperature steam curing in several hours, obtain finished product with 2.0 compression ratio through self-dumping mixer.
Embodiment 8
Take by weighing each raw material by following weight: 52.5 label cement 20kg, tap density is the organically-modified pearlstone 70kg of 90g/L, active filler silicon powder 2kg, polymer emulsion 7.4kg, additive water-holding agent 0.6kg; After above-mentioned raw materials mixed, add the water of 50kg, stir into half-dried material, insert in the mould, utilize pressing plate equipment to be pressed into fireproof heated board, after high temperature steam curing in several hours, obtain finished product with 1.8 compression ratio through self-dumping mixer.
Embodiment 9
Take by weighing each raw material by following weight: 52.5 label cement 18kg, tap density is the organically-modified pearlstone 73kg of 70g/L, active filler silicon powder 1kg, polymer emulsion 7.5kg, additive polypropene staple 0.5kg; After above-mentioned raw materials mixed, add the water of 45kg, stir into half-dried material, insert in the mould, utilize pressing plate equipment to be pressed into fireproof heated board, after high temperature steam curing in several hours, obtain finished product with 2.0 compression ratio through self-dumping mixer.
Embodiment 10
Take by weighing each raw material by following weight: 42.5 label cement 30kg, tap density is the organically-modified pearlstone 65kg of 60g/L, active filler 0, polymer emulsion 4.6kg, additive high efficiency water reducing agent 0.4kg; After above-mentioned raw materials mixed, add the water of 55kg, stir into half-dried material, insert in the mould, utilize pressing plate equipment to be pressed into fireproof heated board, after high temperature steam curing in several hours, obtain finished product with 2.0 compression ratio through self-dumping mixer.
The fireproof heated board performance test results that table 4 embodiment 1-10 obtains
Claims (10)
1. dual organically-modified cement based pearlstone fireproof heated board; It is characterized in that: the component of described fireproof heated board comprises by weight ratio: organically-modified pearlstone 50 ~ 80%, silicate cement 20 ~ 35%, polymer emulsion 5 ~ 10%, active filler 0 ~ 3%, additive 0.5 ~ 1%; The weight proportion sum of said components is 100%.
2. a kind of dual organically-modified cement based pearlstone fireproof heated board according to claim 1, it is characterized in that: the tap density of described organically-modified pearlstone is 40 ~ 100g/L.
3. a kind of dual organically-modified cement based pearlstone fireproof heated board according to claim 1, it is characterized in that: the label of described silicate cement is 42.5 or 52.5.
4. a kind of dual organically-modified cement based pearlstone fireproof heated board according to claim 1, it is characterized in that: described polymer emulsion is pure acrylic acid polymer emulsion or polyvinyl acetate polymer emulsion.
5. a kind of dual organically-modified cement based pearlstone fireproof heated board according to claim 1 is characterized in that: silex powder materials such as the flyash that described active filler is selected for warp 800～1500 mesh sieves, silicon powder.
6. a kind of dual organically-modified cement based pearlstone fireproof heated board according to claim 1 is characterized in that: described additive is one or more of high efficiency water reducing agent, hydrophober, hardening accelerator, water-holding agent, polypropene staple.
7. like the preparation method of the arbitrary described a kind of dual organically-modified cement based pearlstone fireproof heated board of claim 1-6, comprising:
With each raw materials mix evenly after, add entry, obtain half-dried material through stirring, insert then in the mould, be pressed into fireproof heated board again, after the high-temperature steam curing maintenance get final product.
8. the preparation method of a kind of dual organically-modified cement based pearlstone fireproof heated board according to claim 7 is characterized in that: the add-on of described water and solid siccative weight ratio are 0.6:1 ~ 1:1.
9. the preparation method of a kind of dual organically-modified cement based pearlstone fireproof heated board according to claim 7 is characterized in that: the compression ratio in the described pressing process is 1.5 ~ 2.2.
10. the preparation method of a kind of dual organically-modified cement based pearlstone fireproof heated board according to claim 7 is characterized in that: the condition of described high-temperature steam curing maintenance is 80 ~ 100 ℃ temperature and 95 ~ 100% humidity.
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