CN102219446A - Modified emulsified bitumen cement waterproof coating and preparation method thereof - Google Patents
Modified emulsified bitumen cement waterproof coating and preparation method thereof Download PDFInfo
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- CN102219446A CN102219446A CN2011100752974A CN201110075297A CN102219446A CN 102219446 A CN102219446 A CN 102219446A CN 2011100752974 A CN2011100752974 A CN 2011100752974A CN 201110075297 A CN201110075297 A CN 201110075297A CN 102219446 A CN102219446 A CN 102219446A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5076—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with masses bonded by inorganic cements
- C04B41/508—Aluminous cements
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Abstract
The invention relates to a modified emulsified bitumen cement waterproof coating and a preparation method thereof. The waterproof coating comprises a liquid material, dry material powder and water with a construction mix ratio of 100:80 to 150:0 to 2, wherein the liquid material comprises a cationic SBS/SBR/CR modified bitumen emulsion with a solid content of equal to or more than 60%, a thixotropic agentm, a film forming assistant and the like, and the dry material powder comprises cement, an expanding agent, defoamer powder, mineral powder and fine sand with a ratio of 40 to 80:3 to 8: 0.05 to 0.1:50 to 100:0 to 50. According to the preparation method of the coating in the invention, the modified bitumen emulsion and the dry material powder are fully stirred in a high speed mixer, so the uniform waterproof coating with certain thixotropy, fluidity and high stability is prepared, thereby the waterproof coating has the advantages of excellent anti-aging performance, low temperature flexibility and water resistance, and is suitable for waterproof engineering of roofing, ground, tunnel, bridge floor and the like.
Description
Technical field
The invention belongs to the architectural waterproof material technical field of waterproofing works such as building roofing, ground, vault, tunnel and bridge floor, relate in particular to a kind of modified emulsifying asphalt cement waterproof paint with good malleable, low temperature flexibility, resistance to deterioration and water-repellancy.
Background technology
Architectural waterproof material mainly contains waterproof roll and waterproof paint, waterproof roll has polymer membranes and modified asphalt waterproof coiled material two big classes, they all have good use properties, the general barbola work that adopts is constructed, the solvent-borne type binding agent is coated on the buildings basal plane, waterproof roll is spread on the basal plane that scribbles binding agent then, this construction technology requires the basal plane drying, and ponding or humidity must not be arranged, on the other hand, the length and the wide cut of the waterproof roll that batch production is produced are limited, therefore, have overlap joint by its waterproof layer that forms, and seam lap weak node often causes seepage easily; Its three, waterproof roll has certain thickness, for the basal plane of complex geometry or the basal plane of some projections is arranged, the waterproof roll node is more, forms hollowing easily, construction quality and waterproof effect are difficult to guarantee.
Building water-proof paint mainly contains solvent-borne type and water-latex type two big classes, solvent-type waterproofing paint is by macromolecule resin and solvent composition, the waterproof paint of urethane, polyureas material for example, solvent-type waterproofing paint requires high to the ridity of buildings basal plane, and, produce and construction in organic solvent environment and human body polluted and injure not environmental protection; On the other hand, the basal plane great majority of buildings are concrete surfaces, and concrete surface is porous, and therefore, the waterproof membrane that solvent-type waterproofing paint construction back forms is difficult to avoid aperture, has a strong impact on waterproof effect, and difficulty of construction is very big.Water-emulsifying type waterproof coatings can apply at moist basal plane, and very strong penetrating power is arranged on the blown-out concrete basal plane, can infiltrate in the pore of basal plane, and with its obstruction, waterproof effect is better, and construction technology is simpler.At present, be that the water-emulsifying type waterproof coatings of film forming material is more with synthetic resins latex, for example, patent publication No. is that the high intensity elastic water-proofing material of CN1876750A invention adopts ACRYLIC EMULSION and liquid silastic as film forming material; Patent publication No. is that a kind of high molecular emulsion waterproof paint of CN1431262A invention adopts polyacrylic ester and polyethylene vinyl acetate ester emulsion as film forming material; Patent publication No. is that the low polymer cement ratio high performance polymer modified cement waterproofing coating of CN1386809A invention adopts polyacrylic latex as film forming material; Patent publication No. is that the crosslinking polymer cement coating of CN1923926A invention also is to adopt acrylic polymer emulsions as film forming material.This class waterproof paint has better water resistance, but because to adopt synthetic resins latex be main ingredient, cost is higher, and the waterproof membrane that the construction back forms returns breast and swelling easily and influences the weather resistance and the waterproof effect of waterproof membrane under the long term of water.
Summary of the invention
The objective of the invention is to overcome the above-mentioned defective of existing building waterproof paint, a kind of modified emulsifying asphalt cement waterproof paint is provided, it has high malleable, low temperature flexibility, weathering resistance and water resistance.
A large amount of engineering practices prove: oil refinery's industry produce by product---pitch is a kind of excellent waterproof material, and price is lower, and resource is wider.Compare with synthetic resins, the bituminous shortcoming is a temperature sensitivity, and especially low temperature flexibility is relatively poor, is difficult to satisfy service requirements.But this shortcoming can be by significantly improving after the small amount of polymer modification, the pitch after polymer modification not only keep its good water-repellancy, with the cohesiveness of concrete surface, and have high malleable, low temperature flexibility and weathering resistance.Polymkeric substance commonly used has the B-S-B resin, i.e. SBS resin, styrene-butadiene rubber(SBR), chloroprene rubber and polyethylene vinyl acetate multipolymer etc.So commercially available bituminous matter waterproof roll all adopts modifying asphalt production at present.Because the limitation of waterproof roll construction application, the present invention adopts modified pitch emulsion as base-material, prepare a kind of modified emulsifying asphalt cement waterproof paint, its advantage is the limitation that this water-proof material has not only overcome waterproof roll, and overcome the pollution problem of solvent-type waterproofing paint and the shortcoming of polymer latex waterproof paint, be a kind of have premium properties, lower-cost waterproof paint.
Technical scheme of the present invention is as follows:
A kind of modified emulsifying asphalt cement waterproof paint is characterized in that it mainly is made up of modified pitch emulsion, dry mash and water, and the quality share proportioning of its main moiety is 100 parts of modified pitch emulsions, 80～150 parts of dry mash, 0～2 part in water; Wherein modified pitch emulsion comprises any among three kinds of the SBS modified pitch emulsions, SBR modified pitch emulsion, CR modified pitch emulsion; The moiety quality share ratio of dry mash is: 40～80 parts of cement, 3～8 parts of swelling agents, 50～100 parts of 300 order mineral dusts, 0～50 part of 120 order fine sand.
Modified emulsifying asphalt adopts two kinds of technological lines, and the modification of first inner blending method at high temperature mixes SBS resin and matrix pitch and reaction, makes the SBS modifying asphalt, and wherein the addition content of SBS resin accounts for 2～3.5% of asphalt quality.Then, SBS modifying asphalt, cationic emulsification soap lye and water are prepared the SBS modified emulsifying asphalt through colloidal mill, controlling its solid content is 50～65%.It two is outer doping modifications, existing matrix pitch, cationic emulsification soap lye and water is prepared emulsified bitumen through colloidal mill, again with SBR latex or CR latex with emulsified bitumen is mixed in homogenizer must SBR or CR modified pitch emulsion.The organic membrane that is formed by modified pitch emulsion has good malleable and low temperature flexibility, by control SBS resin, SBR or CR latex volume, can make the modifying asphalt film still have snappiness under 0～-40 ℃, and cracking or brittle failure phenomenon can not take place.
Pitch is a kind of organic gel gel material, and it can glued joint mineral dust, sand, stone, not only can improve the intensity and the rigidity of agglutinate, improves dimensional stability, and can reduce cost.Contain 40～50% water in the modified pitch emulsion, if add mineral dust in the modified pitch emulsion waterproof paint, this part water has only by evaporation, and this can influence the quality of formed waterproof membrane.The present invention adopts cement instead of part or whole mineral dust, and on the one hand, cement and water generation hydration reaction consume the water in the waterproof paint; On the other hand, formed gel state hydrate of hydrated cementitious and modifying asphalt form inierpeneirating network structure, water resisting property, weathering resistance and the high temperature resistant property of waterproof membrane have been improved, prevent bad phenomenon such as waterproof membrane is clamminess under swelling and the high temperature by the water long term, thereby increased substantially the technical feature and the waterproof effect of waterproof paint.
In hydrated cementitious and the modified pitch emulsion film process certain volumetric shrinkage is arranged all, this can cause the formed waterproof membrane of waterproof paint exist gauffer or with the basal plane unsticking.For fear of this phenomenon, the present invention has adopted swelling agent, swelling agent with the reaction process of cement-hydrate, water in, can produce certain volumetric expansion, with the volumetric shrinkage in the compensation film process.
In modified pitch emulsion and the solid powder whipping process, can produce more bubble, this can influence density, mechanical property and the waterproof effect of waterproof membrane.For this reason, the present invention or the bubble that also adopts defoamer elimination whipping process to produce, the air content of reduction waterproof paint.
For easy construction and control of construction quality, the present invention adopts the two-pack technical scheme, and solid ingredient material premixs such as cement, mineral dust or sand, solid defoamer are formed dry mash.
Modified pitch emulsion cement waterproof paint of the present invention is made up of modified pitch emulsion and dry mash and water, and its moiety quality share construction proportioning is a modified pitch emulsion: dry mash: water=100 part: 80～150 parts: 0～2 part.The present invention adopts building asphalt to carry out modification as matrix pitch.
The quality share ratio of each moiety of SBS modified pitch emulsion is:
Each moiety quality share ratio of SBR modified pitch emulsion is:
Each moiety quality share ratio of CR modified pitch emulsion is:
Wherein matrix pitch can be building 60 pitches, and the emulsification soap lye is to be mixed by cationic emulsifier, ionogen and water to form.
Each moiety quality share ratio of dry mash is:
The preparation method of modified emulsifying asphalt cement waterproof paint of the present invention is:
(1) preparation method of modified pitch emulsion:
A), the SBS modified pitch emulsion adopts the inner blending method explained hereafter: with in SBS resin, additive and the matrix pitch input reaction kettle, be heated to 160～175 ℃ earlier, the SBS resin fully dissolved be dispersed in the matrix pitch, make the SBS modifying asphalt; With cationic emulsifier, ionogen, thixotropic agent and water mixed the emulsification soap lye, and be heated 60～70 ℃; Then, the SBS modifying asphalt of heat and emulsification soap lye are entered mulser continuously according to 60: 40 ratio, make the SBS modified pitch emulsion, be cooled to 50 ℃, send into hold-up vessel.
B), SBR modified pitch emulsion and CR modified pitch emulsion adopt the outer doping explained hereafter: earlier matrix pitch is heated to 160～175 ℃; With cationic emulsifier, ionogen, thixotropic agent and water mixed the emulsification soap lye, and be heated 60～70 ℃; Then, the matrix pitch of heat and emulsification soap lye are entered mulser continuously according to 60: 40 ratio, make bitumen emulsion, be cooled to 50 ℃; Again SBR emulsion or CR emulsion and bitumen emulsion are mixed in mixing machine, make SBR or CR modified pitch emulsion, send into hold-up vessel.
(2) preparation method of dry mash:
Fine sand, swelling agent, defoamer and mineral dust are added in the twin screw mixing machine successively, mixed 1 minute; Again cement is dropped in the mixing machine, mixed 3～4 minutes, make each constituent materials thorough mixing even, pack every bag of 50kg with bag.
(3) the modified emulsifying asphalt cement waterproof paint adopts the working-yard to mix system:
The working-yard forms waterproof paint with modified pitch emulsion and dry mash in stirrer for mixing, and stirrer can be the vertical-type planetary stirrer, also can be horizontal mortar mixer, preferably the former.Earlier modified pitch emulsion and required water are dropped in the stirrer, stir with 20～30 rev/mins speed, under this stirring velocity, slowly dry mash is dropped in the stirrer, after adding, stirred 3～5 minutes with 100～120 rev/mins speed, solid particulate in the dry mash is well dispersed in the liquid, makes the modified emulsifying asphalt cement waterproof paint.
Performance index according to the waterproof paint of the present invention of above-mentioned preparation technology and proportioning preparation are as shown in table 1.
The performance index of table 1 modified emulsifying asphalt cement waterproof paint of the present invention
Embodiment:
The present invention further specifies as follows in conjunction with specific embodiments:
Embodiment 1～3: the modified emulsifying asphalt cement waterproof paint is by cationic polychloroprene latex (CR, solid content is 50%) and cationic emulsified bitumen (solid content is 60%) mixing formation CR modified pitch emulsion, by the mixed dry mash that gets of cement, swelling agent, fine sand, mineral dust and defoamer.It is composed as follows:
Each moiety quality share proportioning of dry mash is:
Each moiety quality share proportioning of waterproof paint is:
The modified emulsifying asphalt cement waterproof paint of the present invention that makes according to said ratio, its every performance index satisfy the requirement of table 1, and have tensile strength and elongation at break big, with moist concrete basal plane cohesive strength height, anti-water permeate and characteristics such as low temperature flexibility is good, anti-aging and weathering resistance is good, but cold process construction wet trade, easy construction.Take all factors into consideration from technical feature and economy, be embodiment 2 best the composition, and its tensile strength is 2.9MPa, and elongation at break is 250%, and low temperature flexibility is lower than-15 ℃.
Embodiment 4～6: the dry mash that the modified emulsifying asphalt cement waterproof paint mixes by cationic SBS modified emulsifying asphalt (solid content is 60%) with by cement, swelling agent, fine sand, mineral dust and defoamer is through mechanical stirring and mixed.It is composed as follows:
Each moiety quality share proportioning of dry mash is:
Each moiety quality share proportioning of waterproof paint is:
The modified emulsifying asphalt cement waterproof paint of the present invention that makes according to said ratio, its every performance index are except that the requirement of satisfying table 1, outstanding performance characteristics is the rebound degree height of waterproof membrane, especially the stretching rebound degree of the waterproof membrane of embodiment 6 arrives more than 80%, and low temperature flexibility is lower than-15 ℃.
The preparation technology of the SBS modified emulsifying asphalt among the embodiment 4～6 with SBS modified resin and the mixed SBS modifying asphalt that gets of petroleum pitch heating, adopts colloidal mill that the emulsification of SBS modifying asphalt is made the SBS modified emulsifying asphalt earlier then.Consider that from performance the SBS addition content is big more, the performance of waterproof coating is good more.If but further increase SBS modified resin content in the pitch, then the emulsification of modifying asphalt is just very difficult, and the SBS resin is dispersed in the pitch fully, influences its performance on the contrary, therefore, to form be embodiment 6 to the best for preparing waterproof paint with the SBS modified emulsifying asphalt.
Embodiment 7～9: the modified emulsifying asphalt cement waterproof paint is by cationic styrene-butadiene latex (SBR, solid content is 50%) and cationic emulsified bitumen (solid content is 60%) mixing formation SBR modified pitch emulsion, by the mixed dry mash that gets of cement, swelling agent, fine sand, mineral dust and defoamer.It is composed as follows:
Each moiety quality share proportioning of dry mash is:
Each moiety quality share proportioning of waterproof paint is:
The modified emulsifying asphalt cement waterproof paint of the present invention that makes according to said ratio, its every performance index satisfy the requirement of table 1, and have tensile strength and elongation at break big, with moist concrete basal plane cohesive strength height, anti-water permeate and characteristics such as low temperature flexibility is good, anti-aging and weathering resistance is good, but cold process construction wet trade, easy construction.Take all factors into consideration from technical feature and economy, be embodiment 8 best the composition, and its tensile strength is 3.0MPa, and elongation at break is 280%, and low temperature flexibility is lower than-20 ℃.
The composition and the proportioning that provide among above-mentioned all embodiment, mainly the detected result from physical mechanics draws, in practice of construction, also should pay close attention to the workability of waterproof paint, for example, the viscosity of surface drying time, coating etc. are according to actual engineering construction requirement, an amount of thixotropic agent, accelerator for hardening, defoamer etc. can be added, to obtain good workability in waterproof paint.
Claims (9)
1. modified emulsifying asphalt cement waterproof paint is characterized in that it mainly is made up of modified pitch emulsion, dry mash and water, and the quality share proportioning of its main moiety is 100 parts of modified pitch emulsions, 80～150 parts of dry mash, 0～2 part in water; Wherein modified pitch emulsion comprises any among three kinds of the SBS modified pitch emulsions, SBR modified pitch emulsion, CR modified pitch emulsion; The moiety quality share ratio of dry mash is: 40～80 parts of cement, 3～8 parts of swelling agents, 50～100 parts of 300 order mineral dusts, 0～50 part of 120 order fine sand.
2. modified emulsifying asphalt cement waterproof paint according to claim 1, it is characterized in that described modified emulsifying asphalt is cationic SBS modified pitch emulsion, its solid content is 50～60%, the SBS resin accounts for 1～3.5% of asphalt quality, the emulsification soap lye is 1.8～3.0% of a bitumen emulsion, and contains 0.2～1.0% thixotropic agent.
3. modified emulsifying asphalt cement waterproof paint according to claim 1, it is characterized in that described modified emulsifying asphalt is cationic SBR modified pitch emulsion, its solid content is 50～60%, SBR latex is 2～10% of bitumen emulsion quality, the emulsification soap lye is 1.8～3.0% of a bitumen emulsion, and contains the thixotropic agent that accounts for bitumen emulsion quality 0.2～1.0%.
4. modified emulsifying asphalt cement waterproof paint according to claim 1, it is characterized in that described modified emulsifying asphalt is cationic CR modified pitch emulsion, its solid content is 50～60%, CR latex is 2～10% of bitumen emulsion quality, the emulsification soap lye is 1.8～3.0% of a bitumen emulsion quality, and contains the thixotropic agent that accounts for bitumen emulsion quality 0.2～1.0%.
5. modified emulsifying asphalt cement waterproof paint according to claim 1 is characterized in that described cement is one or more in silicate series cement, aluminate-series cement, the sulplo-aluminate series cement.
6. modified emulsifying asphalt cement waterproof paint according to claim 1 is characterized in that described swelling agent is one or more in calcium sulphoaluminate type, magnesium oxide type, calcium oxide type, the calcium aluminum fluoride type swelling agent.
7. modified emulsifying asphalt cement waterproof paint according to claim 1 is characterized in that described mineral filler is limestone powder, light calcium carbonate powder, flyash, talcum powder, particle diameter less than in the fine sand of 0.3mm one or more.
8. modified emulsifying asphalt cement waterproof paint according to claim 1, it is characterized in that in the described dry mash or contain that to account for the dry mash mass ratio be 0.2～1.5% defoamer that defoamer is one or both in silicone based defoamer and the tributyl phosphate.
9. the preparation method of the described modified emulsifying asphalt cement waterproof paint of claim 1 is:
(1) preparation method of modified pitch emulsion:
A), the SBS modified pitch emulsion adopts the inner blending method explained hereafter: with in SBS resin, additive and the matrix pitch input reaction kettle, be heated to 160～175 ℃ earlier, the SBS resin fully dissolved be dispersed in the matrix pitch, make the SBS modifying asphalt; With cationic emulsifier, ionogen, thixotropic agent and water mixed the emulsification soap lye, and be heated 60～70 ℃; Then, the SBS modifying asphalt of heat and emulsification soap lye are entered mulser continuously according to 60: 40 ratio, make the SBS modified pitch emulsion, be cooled to 50 ℃, send into hold-up vessel.
B), SBR modified pitch emulsion and CR modified pitch emulsion adopt the outer doping explained hereafter: earlier matrix pitch is heated to 160～175 ℃; With cationic emulsifier, ionogen, thixotropic agent and water mixed the emulsification soap lye, and be heated 60～70 ℃; Then, the matrix pitch of heat and emulsification soap lye are entered mulser continuously according to 60: 40 ratio, make bitumen emulsion, be cooled to 50 ℃; Again SBR emulsion or CR emulsion and bitumen emulsion are mixed in mixing machine, make SBR or CR modified pitch emulsion, send into hold-up vessel.
(2) preparation method of dry mash:
Fine sand, swelling agent, defoamer and mineral dust are added in the twin screw mixing machine successively, mixed 1 minute; Again cement is dropped in the mixing machine, mixed 3～4 minutes, make each constituent materials thorough mixing even, pack every bag of 50kg with bag.
(3) the modified emulsifying asphalt cement waterproof paint adopts the working-yard to mix system:
The working-yard forms waterproof paint with modified pitch emulsion and dry mash in stirrer for mixing, and stirrer can be the vertical-type planetary stirrer, also can be horizontal mortar mixer, preferably the former.Earlier modified pitch emulsion and required water are dropped in the stirrer, stir with 20～30 rev/mins speed, under this stirring velocity, slowly dry mash is dropped in the stirrer, after adding, stirred 3～5 minutes with 100～120 rev/mins speed, solid particulate in the dry mash is well dispersed in the liquid, makes the modified emulsifying asphalt cement waterproof paint.
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| CN103232715A (en) * | 2013-05-13 | 2013-08-07 | 东南大学 | Nanoscale automobile exhaust absorption type modified emulsified asphalt and preparation method thereof |
| CN103435294A (en) * | 2013-09-02 | 2013-12-11 | 广州珠江黄埔大桥建设有限公司 | Steel bridge pavement steady seal coat material for preventive maintenance |
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| CN104559256A (en) * | 2014-12-30 | 2015-04-29 | 南通福伦利新材料有限公司 | Compound normal temperature asphalt modifier and synthetic method thereof |
| CN104556886A (en) * | 2013-10-15 | 2015-04-29 | 中国石油化工股份有限公司 | Emulsified asphalt cement mortar for CRTS I-type slab ballastless track and preparation method thereof |
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| CN103232715B (en) * | 2013-05-13 | 2015-12-02 | 东南大学 | A kind of nano level absorbing automobile exhaust type modified emulsifying asphalt and collocation method thereof |
| CN103232715A (en) * | 2013-05-13 | 2013-08-07 | 东南大学 | Nanoscale automobile exhaust absorption type modified emulsified asphalt and preparation method thereof |
| CN103435294A (en) * | 2013-09-02 | 2013-12-11 | 广州珠江黄埔大桥建设有限公司 | Steel bridge pavement steady seal coat material for preventive maintenance |
| CN104556886A (en) * | 2013-10-15 | 2015-04-29 | 中国石油化工股份有限公司 | Emulsified asphalt cement mortar for CRTS I-type slab ballastless track and preparation method thereof |
| CN104211356A (en) * | 2014-09-11 | 2014-12-17 | 锦州东方雨虹建筑材料有限责任公司 | Emulsified asphalt modified cement-based waterproof slurry as well as preparation and use method thereof |
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Application publication date: 20111019 |