CN104327524A - Warm-mixed type water damage resisting asphalt pavement reinforcing agent and preparation method thereof - Google Patents
Warm-mixed type water damage resisting asphalt pavement reinforcing agent and preparation method thereof Download PDFInfo
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- CN104327524A CN104327524A CN201410688004.3A CN201410688004A CN104327524A CN 104327524 A CN104327524 A CN 104327524A CN 201410688004 A CN201410688004 A CN 201410688004A CN 104327524 A CN104327524 A CN 104327524A
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Abstract
The invention discloses a warm-mixed type water damage resisting asphalt pavement reinforcing agent which comprises the following components in percentage by mass: 30-60 percent of low molecular weight polyethylene, 30-60 percent of polyethylene oxide, 0-10 percent of an interface compatibilizer and 0-3 percent of an inorganic reinforcing agent. The interface compatibilizer is used for reducing interface energy between the asphalt pavement reinforcing agent and asphalt and aggregate so that the coating capability between an asphalt cementing material and the aggregate is greatly increased and the water damage resistance of an asphalt mixture is improved; when the temperature is reduced below a melting point of the asphalt pavement reinforcing agent, plastic components in the asphalt pavement reinforcing agent are separated out by crystallization; due to a nucleation effect of the inorganic reinforcing agent, the plastic components separated out by crystallization grow radially by taking the inorganic reinforcing agent as center; due to a compatibilization effect of the interface compatibilizer, the plastic components form a good adhered netlike structure with the asphalt and the aggregate, so that the high-temperature stability and high-temperature anti-track performance of the asphalt mixture are greatly improved.
Description
Technical field
The present invention relates to a kind of bituminous pavement additive, particularly relate to a kind of warm mix type water resistant and damage bituminous pavement toughener and concrete preparation method thereof.
Background technology
Usually, the design service life of newly-built road is 10 ~ 15 years, but along with canalized traffic and heavy duty, constantly the increasing the weight of of overload problems, the actual service life of bituminous pavement greatly reduces, especially at the special road section such as Heavy Traffic, Large Longitudinal Slope, bituminous pavement military service just starts to occur rut for 3 ~ 5 years, gathers around bag, cheats many diseases such as groove, crack, Moisture Damage, has a strong impact on the traffic safety of people.
At present, hot-mix asphalt mixture remains mainstream technology during traffic construction, due to the mix of hot-mix asphalt mixture and compacting temperature usually up to 150 DEG C ~ 190 DEG C, easily make ageing of asphalt, affect the pavement performance of asphalt; Construction at high temperature must bring a large amount of energy consumptions simultaneously, is unfavorable for the sustainable development of energy-saving and emission-reduction, environmental protection; And asphalt can discharge a large amount of CO, CO in construction at high temperature process
2, SO
2and NO
xdeng obnoxious flavour, not only cause environmental pollution, also high risks is brought to the healthy of workmen.
In general, can by adding all kinds of properties-correcting agent or additive in pitch or asphalt, as: SBS, rubber powder, anti-rut agent, warm-mixing agent, antistripping agent etc., improve the high/low temperature stability, construction workability, anti-water damage property etc. of bituminous pavement.But, the performance of current all kinds of bituminous pavement additive is all comparatively single, usual a kind of additive only effectively can be punished for one or both pavement diseases, and while a kind of disease of solution, often disadvantageous effect is caused to other pavement performances, such as: high molecular PE class anti-rut agent, in raising bituminous pavement high-temperature stability simultaneously, road surface low-temperature performance and anti-water damage property can be reduced; Although SBS modifying asphalt can improve the high temperature performance of bituminous pavement simultaneously, but must improve mix and the compaction moulding temperature of compound, cause the significantly increase of energy consumption.In addition, the additive product of stable performance mostly in the market is imported product, expensive, is unfavorable for promoting the use of on a large scale.
For above problem, researchist constantly attempts and the function of additive is changed to multifunctional and composite type direction by single type, such as, Niu Yanhui etc. have developed a kind of complete high-performance modified dose of effect, can improve the high-temperature behavior of asphalt, low-temperature performance and anti-water damage property simultaneously; Hong Jinxiang etc. develop a kind of high-modulus asphalt properties-correcting agent with warm mix effect, while the Rut resistance, anti-shear performance of raising bituminous pavement, the viscosity of pitch also can be made significantly to reduce, thus the compaction temperature of asphalt is reduced by 20 ~ 30 DEG C.
But, the research of current multifunctional and composite type bituminous pavement additive is also in the starting stage, the concrete result of use of each product is still in the middle of practice, especially there is warm mix effect and composite type pitch road surface additive with low cost is also very rare, because the defect that above-mentioned existing composite type pitch road surface additive exists, the present inventor is based on being engaged in this type of product design research practical experience abundant for many years and expertise, and coordinate the utilization of scientific principle, actively in addition research and innovation, be intended to propose a kind of novel warm mix type water resistant and damage asphalt road surface reinforcing material, for energy-saving and emission-reduction, prolonging service life of pavement, support personnel's life security, there is important practical significance.
Summary of the invention
Main purpose of the present invention is, overcome the defect that existing warm mix type water resistant damages bituminous pavement toughener and preparation method thereof existence, and provide a kind of novel warm mix type water resistant to damage bituminous pavement toughener and preparation method thereof, while raising high-temperature stability, reduce mix and the compacting temperature of asphalt, thus be more suitable for practicality, and there is the utility value in industry.
The object of the invention to solve the technical problems realizes by the following technical solutions, and a kind of warm mix type water resistant proposed according to the present invention damages bituminous pavement toughener, and comprise following each component, wherein each component is in mass percentage,
Further, aforesaid warm mix type water resistant damages bituminous pavement toughener, and the weight-average molecular weight of described low molecular weight polyethylene is 1000 ~ 5000, and fusing point is 80 DEG C ~ 120 DEG C; Select the polyethylene that molecular weight is little, fusing point is lower, be conducive to Realization of Product warm mix effect, but if molecular weight is too small, disadvantageous effect can be brought to the high-temperature stability of product.
Further, aforesaid warm mix type water resistant damages bituminous pavement toughener, and the fusing point of described polyethylene oxide is 110 DEG C ~ 140 DEG C.
Further, aforesaid warm mix type water resistant damages bituminous pavement toughener, and described Interfacial compatibilization agent is one or both and two or more mixtures in ethylene-vinyl acetate, hard pitch particle, maleic anhydride graft Low Density Polyethylene, maleic anhydride graft high density polyethylene(HDPE).
Further, aforesaid warm mix type water resistant damages bituminous pavement toughener, described inorganic strengthening agent is one or both and two or more mixtures in nano-calcium carbonate, inorganic potter's clay, nano silicon, the size range of wherein said inorganic strengthening agent controls to be optimal selection within 1 μm, if granularity is excessive, fluidity of molten can be caused to be deteriorated, to affect final utilization performance.
Warm mix type water resistant damages a preparation method for bituminous pavement toughener, and the method comprises the steps,
Step 1): take low molecular weight polyethylene, polyethylene oxide, Interfacial compatibilization agent and toughener in proportion, and at room temperature mix, obtain compound;
Step 2): compound is dropped into forcing machine, blended;
Step 3): mixture is cooled to room temperature after forcing machine is extruded, and grinds, and obtains target product.
Further, aforesaid warm mix type water resistant damages the preparation method of bituminous pavement toughener, described step 2) blending temperature be 130 ~ 160 DEG C.
Further, aforesaid warm mix type water resistant damages the preparation method of bituminous pavement toughener, and described forcing machine is twin screw extruder, and screw speed is 80 ~ 110rpm.
By technique scheme, warm mix type water resistant of the present invention is damaged bituminous pavement toughener and preparation method thereof and is at least had following advantages:
Each formula materials is carried out thermal response fusion by reactive extrursion is blended by the present invention, the polyethylene oxide of low melting point and low molecular weight polyethylene is utilized to reduce the fusing point of final bituminous pavement toughener, and then reduce the viscosity of pitch, thus make asphalt can lower mix, compacting temperature be issued to mix hot windrow part with heat under identical compactness, can low 20 DEG C compared with hot-mix asphalt mixture ~ 30 DEG C in the shaping Warm-Mix Bitumen Mixture of warm mix combined pressure reality condition; Meanwhile, utilize Interfacial compatibilization agent to reduce bituminous pavement toughener and pitch and interfacial energy between gathering materials, thus make bituminous cements and the ability that wraps between gathering materials improves greatly, and therefore improve the anti-water damage property of asphalt; The raising of agglutinate and an adhesive power that gathers materials also is conducive to the compacting of asphalt, thus plays certain synergy to warm compaction in compound; When temperature is down under bituminous pavement toughener fusing point, plastic component crystallization in bituminous pavement toughener, due to the nucleating effect of inorganic strengthening agent, plastic component radiation growth centered by inorganic strengthening agent of crystallization, and because of the compatibilization of Interfacial compatibilization agent with pitch and gather materials and form the reticulated structure of bonds well, thus significantly improve high-temperature stability and the high temperature anti-rut behavior of asphalt.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to better understand technique means of the present invention, and can be implemented according to the content of specification sheets, be described in detail as follows below with preferred embodiment of the present invention.
Embodiment
For further setting forth the present invention for the technique means reaching predetermined goal of the invention and take and effect, bituminous pavement toughener and preparation method thereof and embodiment, feature and effect thereof are damaged to the warm mix type water resistant proposed according to the present invention, be described in detail as follows, each material wherein used is commercially available material.
Embodiment 1
Warm mix type water resistant of the present invention damages bituminous pavement toughener, is made up of each component of following mass parts:
Wherein, the weight-average molecular weight of low molecular weight polyethylene is 2500, and fusing point is 99 DEG C, and the fusing point of polyethylene oxide is 131 DEG C, and Interfacial compatibilization agent is ethylene-vinyl acetate, and wherein the content of vinyl acetate between to for plastic is 18%, and inorganic strengthening agent is nano-calcium carbonate.
Preparation process is as follows:
Above starting material are at room temperature mixed in proportion, drops into twin screw extruder, control blending temperature at 130 DEG C, screw speed 85rpm, mixture is cooled to room temperature after forcing machine is extruded, and grinds, and namely obtains warm mix type water resistant of the present invention and damages bituminous pavement toughener.
Embodiment 2
Warm mix type water resistant of the present invention damages bituminous pavement toughener, is made up of each component of following mass parts:
Wherein, the weight-average molecular weight of low molecular weight polyethylene is 3000, fusing point is 85.6 ~ 106.5 DEG C, the fusing point of polyethylene oxide is 113 DEG C, Interfacial compatibilization agent is the mixture of hard pitch particle and ethylene-vinyl acetate, wherein the mass ratio of hard pitch particle and ethylene-vinyl acetate is 3:2, and inorganic strengthening agent is nano-calcium carbonate and the inorganic potter's clay mixture according to mass ratio 1:1.
Preparation process is as follows:
Above starting material are mixed in proportion at normal temperatures, drops into twin screw extruder, control blending temperature at 155 DEG C, screw speed 90rpm, mixture is cooled to room temperature after forcing machine is extruded, and grinds, and namely obtains warm mix type water resistant of the present invention and damages bituminous pavement toughener.
Embodiment 3
Warm mix type water resistant of the present invention damages bituminous pavement toughener, is made up of each component of following mass parts:
Wherein the weight-average molecular weight of low molecular weight polyethylene is 2500, and fusing point is 100 DEG C, and the fusing point of polyethylene oxide is 131 DEG C, and Interfacial compatibilization agent is hard pitch particle, and inorganic strengthening agent is nano-calcium carbonate.
Preparation process is as follows:
At room temperature mixed in proportion by above starting material, drop into twin screw extruder, controlling blending temperature is 145 DEG C, screw speed 100rpm, mixture is cooled to room temperature after forcing machine is extruded, and grinds, and namely obtains warm mix type water resistant of the present invention and damages bituminous pavement toughener.
Checking example 1
The warm mix type water resistant that Example 1,2,3 prepares respectively damages bituminous pavement toughener, two imperial 70# matrix pitch is added into by 7% volume, stir under 145 DEG C of conditions, sample respectively, test is added with the viscosity of bituminous material respectively 60 DEG C, 135 DEG C, 155 DEG C, 175 DEG C time of toughener, and test-results lists in table 1.
Table 1
| Bituminous pavement toughener | Embodiment 1 | Embodiment 2 | Embodiment 3 | 70# matrix pitch |
| 60 DEG C of viscosity (Pas) | ＞25000 | ＞25000 | ＞25000 | 226 |
| 135 DEG C of viscosity (Pas) | 0.34 | 0.38 | 0.33 | 0.42 |
| 155 DEG C of viscosity (Pas) | 0.16 | 0.18 | 0.15 | 0.17 |
| 175 DEG C of viscosity (Pas) | 0.08 | 0.09 | 0.07 | 0.08 |
Test proves that the warm mix type water resistant adopting the present invention to prepare damages bituminous pavement toughener, effectively can improve 60 DEG C of viscosity of pitch, simultaneously, effectively can reduce pitch 135 DEG C of viscosity, the warm mix type water resistant that visible employing the present invention prepares damages bituminous pavement toughener, is conducive to the high temperature anti-rut behavior improving asphalt, is also conducive to the mix and the compacting temperature that reduce asphalt simultaneously, improve construction workability, reach the effect of middle warm mix combined pressure reality, energy-saving and emission-reduction.
Checking example 2
Example 1 respectively, 2, the 3 warm mix type water resistants prepared damage bituminous pavement toughener, adopt two imperial 70# matrix pitch, limestone building stones, according to Sup-20 grating, bituminous pavement toughener volume accounts for 0.4% of asphalt, compaction moulding asphalt under 115 DEG C of conditions, be designated as embodiment A respectively, Embodiment B, Embodiment C, test it high, low-temperature performance and anti-water damage property, and contrast with the 70# matrix pitch compound (compacting temperature 145 DEG C) of non-admixture bituminous pavement toughener and SBS modified asphalt mixture (compacting temperature 165 DEG C), test-results lists in table 2.
Table 2
Proved by application test, the warm mix type water resistant adopting the present invention to prepare damages bituminous pavement toughener, can in low 30 DEG C compared with hot-mix asphalt mixture warm mix combined pressure reality condition compacted under Warm-Mix Bitumen Mixture, and the high temperature anti-rut behavior of compound comparatively hot-mix asphalt mixture be improved largely, anti-water damage property also has lifting, simultaneously, low-temperature performance also meets highway in China Asphalt Pavement Construction Technique specification (JTG F40-2004) requirement, can not cause disadvantageous effect to compound low-temperature performance.
The above, it is only preferred embodiment of the present invention, not any pro forma restriction is done to the present invention, although the present invention discloses as above with preferred embodiment, but and be not used to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, make a little change when the technology contents of above-mentioned announcement can be utilized or be modified to the Equivalent embodiments of equivalent variations, in every case be the content not departing from technical solution of the present invention, according to any simple modification that technical spirit of the present invention is done above embodiment, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (9)
1. warm mix type water resistant damages bituminous pavement toughener, it is characterized in that: comprise following each component, wherein each component is in mass percentage,
2. warm mix type water resistant according to claim 1 damages bituminous pavement toughener, and it is characterized in that: the weight-average molecular weight of described low molecular weight polyethylene is 1000 ~ 5000, fusing point is 80 DEG C ~ 120 DEG C.
3. warm mix type water resistant according to claim 1 damages bituminous pavement toughener, it is characterized in that: the fusing point of described polyethylene oxide is 110 DEG C ~ 140 DEG C.
4. warm mix type water resistant according to claim 1 damages bituminous pavement toughener, it is characterized in that: described Interfacial compatibilization agent is one or both and two or more mixtures in ethylene-vinyl acetate, hard pitch particle, maleic anhydride graft Low Density Polyethylene, maleic anhydride graft high density polyethylene(HDPE).
5. warm mix type water resistant according to claim 1 damages bituminous pavement toughener, it is characterized in that: described inorganic strengthening agent is one or both and two or more mixtures in nano-calcium carbonate, inorganic potter's clay, nano silicon.
6. warm mix type water resistant according to claim 5 damages bituminous pavement toughener, it is characterized in that: the granularity < of described inorganic strengthening agent 1 μm.
7. warm mix type water resistant damages a preparation method for bituminous pavement toughener, it is characterized in that: the method comprises the steps,
Step 1): take low molecular weight polyethylene, polyethylene oxide, Interfacial compatibilization agent and toughener in proportion, and at room temperature mix, obtain compound;
Step 2): compound is dropped into forcing machine, blended;
Step 3): mixture is cooled to room temperature after forcing machine is extruded, and grinds, and obtains target product.
8. warm mix type water resistant according to claim 7 damages the preparation method of bituminous pavement toughener, it is characterized in that: described step 2) blending temperature be 130 ~ 160 DEG C.
9. warm mix type water resistant according to claim 7 damages the preparation method of bituminous pavement toughener, and it is characterized in that: described forcing machine is twin screw extruder, screw speed is 80 ~ 110rpm.
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| CN113652000A (en) * | 2021-08-02 | 2021-11-16 | 浙江大学 | Asphalt anti-stripping agent containing bionic material and asphalt preparation method thereof |
| CN113896449A (en) * | 2021-11-03 | 2022-01-07 | 深圳恒隆源交通科技有限公司 | Road strength agent and asphalt mixture containing same |
| CN115678295A (en) * | 2021-07-27 | 2023-02-03 | 中国石油化工股份有限公司 | Anti-stripping agent and preparation method and application thereof |
| CN115678293A (en) * | 2021-07-27 | 2023-02-03 | 中国石油化工股份有限公司 | Anti-stripping agent and preparation method and application thereof |
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Cited By (9)
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| CN107226640A (en) * | 2017-06-05 | 2017-10-03 | 长沙理工大学 | A kind of color emulsified asphalt compound and preparation method thereof |
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| CN115678293A (en) * | 2021-07-27 | 2023-02-03 | 中国石油化工股份有限公司 | Anti-stripping agent and preparation method and application thereof |
| CN115678293B (en) * | 2021-07-27 | 2023-09-01 | 中国石油化工股份有限公司 | Anti-stripping agent and preparation method and application thereof |
| CN115678295B (en) * | 2021-07-27 | 2023-09-01 | 中国石油化工股份有限公司 | Anti-stripping agent and preparation method and application thereof |
| CN113652000A (en) * | 2021-08-02 | 2021-11-16 | 浙江大学 | Asphalt anti-stripping agent containing bionic material and asphalt preparation method thereof |
| CN113896449A (en) * | 2021-11-03 | 2022-01-07 | 深圳恒隆源交通科技有限公司 | Road strength agent and asphalt mixture containing same |
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