CN103113751B - A kind of adhesion coating cation-modified emulsified bitumen and preparation method thereof - Google Patents
A kind of adhesion coating cation-modified emulsified bitumen and preparation method thereof Download PDFInfo
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Abstract
The invention provides a kind of adhesion coating cation-modified emulsified bitumen and preparation method thereof, its composition comprises matrix pitch, SBS modifier, emulsifying agent, water, PH conditioning agent, organic stabilizer and inorganic stabilizers; Preparation process adopts colloidal mill emulsification to obtain the finished product by the proportioning and processing temperature controlling material; Prepared emulsified bitumen solid content is low, high temperature performance is excellent, recovery of elasticity and adhesive property is strong, good stability, and softening temperature and recovery of elasticity all can reach more than 70, far away higher than the index of general modified emulsifying asphalt; The present invention adopts extraordinary emulsifying agent and properties-correcting agent, not only makes modifying asphalt be easy to emulsification, and the modified emulsifying asphalt performance of preparation is good; And adopt compound stabilizer, improve emulsion-stabilizing performance.
Description
Technical field
The present invention relates to cation-modified emulsified bitumen of a kind of road adhesion coating and preparation method thereof.
Background technology
China " standard specification for construction and acceptance of highway asphalt pavement " (JTGF40-2004) specifies: two-layer equation or three-layer type heat are mixed between the brea bed of hot petrolize mixture pavement, on cement concrete pavement, Asphalt Stabilized Crushed Stone Basement or old asphalt pavement layer, repaving asphalt coat all answers spread sticking layer oil, and proposes concrete regulation to the index of sticking layer oil.If sticking layer oil can not provide good cohesive force, bituminous pavement interlayer will be made to occur slippage, gather around the diseases such as bag, the globality on havoc road surface and structure stress, especially at places such as high temperature season longitudinal gradient, bends, this phenomenon is particularly evident.
Research abroad for modified emulsifying asphalt concentrates on the aspect such as slurry seal and micro-surface area mostly, the recent development of slurry seal in recent years utilizes polymer modification emulsified bitumen making slurry seal, international slurry seal association promulgates the document such as " the ISSAA143-1996-modified emulsified asphalt slurry seal job instruction " of revision, " the modified emulsified asphalt slurry seal working specification " of Federal Highway office of DOT promulgation, has all promoted the application of modified emulsifying asphalt on road.The external sticking layer oil application of Reporting survey analysis and condition of construction, be applied to adhesion coating about modified emulsifying asphalt and relate to less.
The present sticking material of China uses more mainly common emulsified asphalt and SBR modified emulsifying asphalt, and the evaporation residue softening temperature of these two kinds of emulsified bitumens and recovery of elasticity lower, high-temperature behavior is not satisfactory, is difficult to meet the requirement of the cohesive strength under special environment condition.Some road work person develops a kind of cohesiveness modified emulsifying asphalt relatively preferably for this reason.Its critical process for mix the agent of a certain proportion of (about 4% ~ 12%) latex modified in pitch, as SBR latex, liquid SBS modified dose etc., adopt the technique of limit modification limit emulsification to prepare emulsified bitumen, general proportioning is pitch: water: latex=60:35:6.A kind of technique is also had exactly matrix pitch first to be made modifying asphalt and then emulsification, but general when SBS volume is greater than 4%, and pitch is difficult to emulsification.The emulsified bitumen performance prepared of above two kinds of techniques comparatively common emulsified asphalt will be got well, but does not also reach the requirement of hgh-performance emulsified pitch, and especially softening temperature and recovery of elasticity reach more than 70 and be difficult to, and solid content is higher, has a certain impact to construction.
Summary of the invention
The object of the present invention is to provide a kind of high-performance adhesion coating cation-modified emulsified bitumen and preparation method thereof.
For achieving the above object, present invention employs following technical scheme.
The cation-modified emulsified bitumen of a kind of adhesion coating, this emulsified bitumen comprises following composition by mass percent, and the mass percent sum of each composition equals 100%:
Matrix pitch: 45 ~ 55%
SBS modifier: 1.5 ~ 4%
Cationic emulsifier: 1.2 ~ 2.0%
Water: 45 ~ 50%
Organic stabilizer: 0.1 ~ 0.3%
Inorganic stabilizers: 0.1 ~ 0.3%
PH conditioning agent: 1.0 ~ 2%
Linking agent: 0.1 ~ 0.125%
, described SBS modifier is linear styrene-butadiene-styrene block copolymer (Shell Co. Ltd's production), and the inlay character of SBS modifier is 10/90 ~ 20/80, and molecular weight is 80,000 ~ 90,000.
Described matrix pitch is bi tumenf orr oad.
Described cationic emulsifier is the mixture of octadecyltrimethylammonium salt, cetyltrimethyl ammonium salt and hexadecyl Edamine, the real big gram of cationic emulsifier DF-62 produced of such as virtue dimension.
Described organic stabilizer is one or both in polyvinyl alcohol or methylcellulose gum.
Described inorganic stabilizers is one or both in calcium chloride or ammonium chloride.
Described PH conditioning agent is one or both in concentrated hydrochloric acid or the vitriol oil.
Described linking agent is polysulfide or peroxide.
The above-mentioned adhesion coating preparation method of cation-modified emulsified bitumen, comprises the following steps:
1) matrix pitch is heated to melt and dissolved at 140 ~ 150 DEG C, then in matrix pitch, SBS modifier is added, stir 40 ~ 50 minutes after adding SBS modifier, stir post-heating to 160 ~ 180 DEG C, then shear 30 ~ 40 minutes with high-speed shearing machine, shears rotating speed is 3000 ~ 5000r/min, then be cooled to 140 ~ 150 DEG C, after cooling, add linking agent again, then continue shearing 10 ~ 15 minutes, obtain modifying asphalt, be incubated for subsequent use;
2) after step 1), soap lye is mixed with after cationic emulsifier, organic stabilizer, inorganic stabilizers, water and PH conditioning agent being mixed in proportion, pH controls between 2 ~ 3, after soap lye being heated to 50 ~ 70 DEG C, insulation modifying asphalt for subsequent use is slowly poured in soap lye, limit bevelling stirs, prevent foam, then use colloidal mill mixing and emulsifying, obtain the cation-modified emulsified asphalt product of adhesion coating.
Beneficial effect of the present invention is:
1, the SBS modifier that the present invention adopts is linear structure, and molecular weight is little, and more general star-like and type SBS properties-correcting agent is easy to emulsification, and modifiedly has good castering action to asphalt performance.
The present invention adopt emulsifier effective, especially emulsified modified asphalt, the emulsified bitumen of preparation is even, storage stability good, and emulsified bitumen residue index comparatively former state pitch be improved to some extent, with the obvious advantage.
Due to above feature, modified emulsifying asphalt high temperature performance prepared by the present invention and elastic recovery capability strong, when using as adhesion coating pitch, adhesive property is improved greatly, cohesive strength comparatively SBR modified emulsifying asphalt improves 30 ~ 40%, de-emulsification speed is fast, ensure that the continuity of site operation, and have good waterproof action.
2, preparation process of the present invention is by controlling proportioning and the processing temperature of raw material, adopts colloidal mill emulsification to obtain the finished product; Prepared emulsified bitumen solid content is low, high temperature performance is excellent, recovery of elasticity and adhesive property is strong, good stability, and softening temperature and recovery of elasticity all can reach more than 70, far away higher than the index of general modified emulsifying asphalt; The emulsifying agent that the present invention adopts and properties-correcting agent, not only make modifying asphalt be easy to emulsification, and the modified emulsifying asphalt performance of preparation is good; The present invention adopts compound stabilizer, improves emulsion-stabilizing performance.
3, production cost of the present invention is compared with prior art substantially suitable, but the modified emulsifying asphalt superior performance of preparation, obviously can improve the disease that bituminous pavement interlayer causes due to imperfect bonding, there is significant Social benefit and economic benefit.
4, production technique of the present invention is simple, and adopt conventional asphalt modification and emulsifying process just can realize above-mentioned advantage, practical, result of use is excellent, is easy to apply.
Embodiment
Below in conjunction with embodiment, the invention will be further described.
Embodiment 1 is described to produce the cation-modified emulsified bitumen of 500g adhesion coating:
First 230g SK90 bi tumenf orr oad is taken, then in the SK90 bi tumenf orr oad under hot melt state (140 ~ 150 DEG C), add 9g SBS modifier (linear styrene-divinyl-styrene block copolymer that Shell Co. Ltd produces, inlay character is 10/90 ~ 20/80, molecular weight is 80,000 ~ 90,000), mechanical stirring after 40 minutes by asphalt heating to 160 ~ 170 DEG C, then shear 30 minutes in modified device (shears), shears rotating speed is 4000r/min, then 140 ~ 150 DEG C are cooled to, (by Jinan, heavy cross-channel bridge Engineering Co., Ltd provides to add 0.5g linking agent after cooling again, model LZ-STAB-03), continue shearing 10 minutes, obtained modifying asphalt, by modifying asphalt heat preservation for standby use at 140 ~ 150 DEG C of preparation.Take 245g water, 7.5g cationic emulsifier (cationic emulsifier is the real big gram of cationic emulsifier DF-62 produced of virtue dimension), 1g calcium chloride, soap lye is made after 1g polyvinyl alcohol and 6g concentrated hydrochloric acid (massfraction 37.5%) mixing, after the soap lye prepared is heated to 50 ~ 70 DEG C, the modifying asphalt of heat preservation for standby use is slowly poured in soap lye while stirring, then in bitumen emulsifying plant (colloidal mill), carrying out emulsification, (colloidal mill rotating speed is 5000r/min, emulsification times 5min), get product cation-modified emulsified bitumen sticking layer oil, products obtained therefrom meets the adhesion coating cationic emulsified bitumen technical indicator of JTG F40-2004 code requirement, leading indicator is in table 1.
Embodiment 2 is described to produce the cation-modified emulsified bitumen of 400g adhesion coating
First 190g Esso No. 70 bi tumenf orr oads are taken, then in Esso No. 70 bi tumenf orr oads under hot melt state (140 ~ 150 DEG C), add 7gSBS properties-correcting agent (linear styrene-divinyl-styrene block copolymer that Shell Co. Ltd produces, inlay character is 10/90 ~ 20/80, molecular weight is 80,000 ~ 90,000), mechanical stirring after 40 minutes by asphalt heating to 160 ~ 170 DEG C, then shear 30 minutes in modified device (shears), shears rotating speed is 4000r/min, then 140 ~ 150 DEG C are cooled to, (by Jinan, heavy cross-channel bridge Engineering Co., Ltd provides to add 0.4g linking agent after cooling again, model LZ-STAB-03), continue shearing 10 minutes, obtained modifying asphalt, by modifying asphalt heat preservation for standby use at 140 ~ 150 DEG C of preparation.Take 190g water, 6g cationic emulsifier (cationic emulsifier is the real big gram of cationic emulsifier DF-62 produced of virtue dimension), 0.8g calcium chloride, soap lye is made after 0.8g polyvinyl alcohol and 5g concentrated hydrochloric acid (massfraction 37.5%) mixing, after the soap lye prepared is heated to 50 ~ 70 DEG C, the modifying asphalt of heat preservation for standby use is slowly poured in soap lye while stirring, then in bitumen emulsifying plant (colloidal mill), carrying out emulsification, (colloidal mill rotating speed is 5000r/min, emulsification times 5min), the cation-modified emulsified bitumen sticking layer oil of the high-performance that gets product, products obtained therefrom meets the adhesion coating cationic emulsified bitumen technical indicator of JTGF40-2004 code requirement, leading indicator is in table 1.
The cation-modified emulsified asphalt product leading indicator of table 1 adhesion coating high-performance
Bonding strength test process and result
Test adopts the GF all-purpose road interlayer force test system (number of patent application 201020272652.8 of Chang An University's independent research, May 4 2011 day for announcing), the Coating combination mode of test test specimen is: AC-16 cutting optimal+sticking layer oil+AC13 asphalt uplayer.Asphalt adopts double-deck rut sheet metal forming, and the shaping placement of cutting optimal is after one day, and surperficial spread sticking layer oil in the layer below, pitch breakdown of emulsion aftershaping upper layer to be emulsified, emulsified bitumen spread quantity is about 0.8kg/m
2.1d core boring sampling (core diameter is about 101.6mm) is placed after double-deck rut sheet metal forming, at 25 DEG C, insulation carries out shearing test in 4 hours, test loading rate is 50mm/min, vertical load 0.7MPa, maximum shear load when destroying using test specimen is as the index evaluating bond strength between layers, test is tested as a comparison with SBR modified emulsifying asphalt, ordinary hot pitch, common emulsified asphalt, SAMI stress absorbing layer under adopting similarity condition, the results are shown in Table 2.
Table 2 sticking layer oil high-performance cation-modified emulsified bitumen shearing test intensity results
Listed embodiment is the object further illustrated, the raw material ratio of the cation-modified emulsified bitumen of adhesion coating high-performance is also not only confined to described in embodiment, the selecting to test of properties-correcting agent, pitch model, emulsifying agent, stablizer, linking agent is determined, specifically adjusts according to the requirement of site operation and surface layer structure type degree.
Claims (6)
1. the cation-modified emulsified bitumen of adhesion coating, is characterized in that: this emulsified bitumen comprises following composition by mass percent:
Matrix pitch: 45 ~ 55%
SBS modifier: 1.5 ~ 4%
Cationic emulsifier: 1.2 ~ 2.0%
Water: 45 ~ 50%
Organic stabilizer: 0.1 ~ 0.3%
Inorganic stabilizers: 0.1 ~ 0.3%
PH adjusting agent: 1.0 ~ 2%
Linking agent: 0.1 ~ 0.125%
, described SBS modifier is linear styrene-divinyl-styrene block copolymer, and the inlay character of SBS modifier is 10/90 ~ 20/80, and molecular weight is 80,000 ~ 90,000; Described cationic emulsifier is cationic emulsifier DF-62; Described linking agent is polysulfide or peroxide, and each composition quality percentage ratio sum is 100%.
2. the cation-modified emulsified bitumen of a kind of adhesion coating according to claim 1, is characterized in that: described matrix pitch is bi tumenf orr oad.
3. the cation-modified emulsified bitumen of a kind of adhesion coating according to claim 1, is characterized in that: described organic stabilizer is one or both in polyvinyl alcohol or methylcellulose gum.
4. the cation-modified emulsified bitumen of a kind of adhesion coating according to claim 1, is characterized in that: described inorganic stabilizers is one or both in calcium chloride or ammonium chloride.
5. the cation-modified emulsified bitumen of a kind of adhesion coating according to claim 1, is characterized in that: described pH adjusting agent is one or both in concentrated hydrochloric acid or the vitriol oil.
6. an adhesion coating preparation method for cation-modified emulsified bitumen as claimed in claim 1, is characterized in that: comprise the following steps:
1) matrix pitch is heated to melt and dissolved at 140 ~ 150 DEG C, then in matrix pitch, SBS modifier is added, stir 40 ~ 50 minutes after adding SBS modifier, stir post-heating to 160 ~ 180 DEG C, then shear 30 ~ 40 minutes with shears, shears rotating speed is 3000 ~ 5000r/min, then be cooled to 140 ~ 150 DEG C, after cooling, add linking agent again, then continue shearing 10 ~ 15 minutes, obtain modifying asphalt, be incubated for subsequent use;
2) through step 1) after, soap lye is mixed with after cationic emulsifier, organic stabilizer, inorganic stabilizers, water and pH adjusting agent being mixed, after soap lye being heated to 50 ~ 70 DEG C, modifying asphalt is poured in soap lye, then use colloidal mill mixing and emulsifying, obtain the cation-modified emulsified bitumen of adhesion coating.
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| CN103965492B (en) * | 2014-04-23 | 2016-05-25 | 安徽路达泰克沥青新材料有限公司 | The preparation method of crosslinked at low temperature emulsified SBS modified asphalt additive |
| CN105696434A (en) * | 2014-11-25 | 2016-06-22 | 北京市政路桥管理养护集团有限公司 | Bituminous binder for carpet bituminous mixture pavement and application thereof |
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