CN110358499B - Wide-area asphalt crack pouring adhesive for high-performance road - Google Patents

Wide-area asphalt crack pouring adhesive for high-performance road Download PDF

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CN110358499B
CN110358499B CN201910399225.1A CN201910399225A CN110358499B CN 110358499 B CN110358499 B CN 110358499B CN 201910399225 A CN201910399225 A CN 201910399225A CN 110358499 B CN110358499 B CN 110358499B
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crack pouring
silica
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CN110358499A (en
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吴亦伦
郝晟
崔永昌
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Harbin Institute of Technology
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/04—Non-macromolecular additives inorganic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/08—Macromolecular additives
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J195/00—Adhesives based on bituminous materials, e.g. asphalt, tar, pitch
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/011—Nanostructured additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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Abstract

The invention discloses a wide-area asphalt crack pouring adhesive for a high-performance road, which is prepared by mixing SBS modified asphalt crack pouring adhesive with modified nano-silica, wherein: the mixing amount of the modified nano silicon dioxide is 5-10% of the total mass of the wide-range asphalt crack pouring adhesive. According to the invention, the nano-silica is modified by using the amino functional group silane coupling agent (KH550), and the mixing ratio of the modified nano-silica crack pouring sealant is determined to improve the temperature adaptation range and the durability of the crack pouring sealant, so that the crack pouring sealant is suitable for regions with large annual temperature difference. The invention effectively solves the problems that the joint sealing glue in the area with large temperature difference change is not durable and is easy to lose efficacy.

Description

Wide-area asphalt crack pouring adhesive for high-performance road
Technical Field
The invention relates to a pavement repairing material, in particular to a wide-area asphalt crack pouring sealant for a road, which is mainly used for repairing pavement cracks in regions with large annual temperature difference and is a high-performance product in a road maintenance material.
Background
With the rapid increase of national highway construction and the increase of medium and heavy vehicles in recent years, the problem of asphalt pavement repair is continuously generated. The seam-filling adhesive used in the market at present has a weak temperature adaptation range, and particularly in northern areas, the seam-filling adhesive is easy to soften, melt and even flow at high temperature in summer, but is easy to crack in winter, and under the action of environmental factors and vehicle load, the failure speed is too high, so that the waste of materials and cost is caused.
Disclosure of Invention
In order to solve the problems, the invention provides the wide-area asphalt crack pouring adhesive for the high-performance road, which has the advantages of wide temperature application range and long service life. According to the invention, the nano-silica is modified by using the amino functional group silane coupling agent (KH550), and the mixing ratio of the modified nano-silica crack pouring sealant is determined to improve the temperature adaptation range and the durability of the crack pouring sealant, so that the crack pouring sealant is suitable for regions with large annual temperature difference.
The purpose of the invention is realized by the following technical scheme:
a wide-area asphalt crack pouring adhesive for a high-performance road is prepared by doping SBS modified asphalt crack pouring adhesive with modified nano-silica, wherein: the doping amount of the modified nano silicon dioxide is 5-10% of the total mass of the wide-area asphalt crack pouring sealant, and the optimal doping amount is 7.5%.
In the invention, the SBS modified asphalt crack pouring adhesive is prepared from rubber powder, an SBS modifier, an SBR modifier, a softener, matrix asphalt, a light stabilizer and an anti-aging agent; the modified nano silicon dioxide is prepared by modifying nano silicon powder by using an amino functional group silane coupling agent, wherein the using amount of the amino functional group silane coupling agent is 5-15% of the mass of the nano silicon powder, and the optimal using amount is 10% of the mass of the nano silicon powder; the best matching mass ratio is rubber powder: SBS modifier: modified nano-silica: SBR modifier: softening agent: matrix asphalt: light stabilizer and antioxidant 15%: 6 percent; 7.5%: 3%: 7%: 60.5 percent to 1 percent.
Compared with the prior art, the invention has the following advantages:
1. according to the characteristics that the silane coupling agent has a good modification function on silicon dioxide and can improve the compatibility of nano silicon dioxide and a colloidal material, the influence of silane coupling agents of different types and different doping amounts on the interaction of the nano silicon dioxide and modified asphalt is researched, and the silane coupling agent of the optimal type is determined to be an amino functional group silane coupling agent (KH550) through a performance detection experiment, wherein the doping amount is 10%.
2. According to the invention, the performance improvement effect of the modified nano-silica is preliminarily evaluated by researching the influence of different doping amounts of the modified nano-silica on the basic performance of the crack pouring sealant. The results show that: with the increase of the doping amount of the nano silicon dioxide, the penetration degree and the elastic recovery rate of the crack pouring adhesive are reduced, the flow value is obviously reduced, and the softening point is increased, but after the doping amount is more than 20%, the indexes of the crack pouring adhesive are not obviously changed.
3. According to the invention, the environment temperature of the dynamic shear rheological experiment is controlled, the experiment is divided into a high-temperature group and a medium-low temperature group, the improvement effect of the modified nano-silica on the performance of the crack pouring adhesive under the high-temperature environment condition and the medium-low temperature environment condition is explored, the dynamic mechanical property contrast analysis experiment of the crack pouring adhesive under different environment temperatures is designed by using a dynamic shear rheometer, and the temperature adaptation range (wide range) of the crack pouring adhesive is evaluated. The experimental results show that: the high-temperature performance of the crack pouring adhesive is obviously superior to that of the common crack pouring adhesive, the high-temperature performance of the crack pouring adhesive can be obviously improved by the modified nano silicon dioxide, the low-temperature performance also meets the requirement, and the application range of the crack pouring adhesive to the temperature is integrally improved.
4. According to the invention, by adopting an orthogonal experimental analysis method and combining the requirement of wide temperature application range, the determined optimal mixture ratio is as follows: rubber powder: SBS: modified nano-silica: SBR: softening agent: matrix asphalt: light stabilizer and antioxidant 15%: 6 percent; 7.5%: 3%: 7%: 60.5%: 1 percent.
5. The invention effectively solves the problems that the joint sealing glue is not durable and is easy to lose efficacy in the large temperature difference areas.
Drawings
FIG. 1 shows the effect of using different types and amounts of silane coupling agents on the penetration of nano-silica pouring sealant.
FIG. 2 is the effect of using different types and amounts of silane coupling agents on the softening point of the nano-silica crack pouring sealant.
FIG. 3 is the effect of using different types and amounts of silane coupling agents on the fluidity of the nano-silica crack pouring sealant.
FIG. 4 is the effect of using different types and amounts of silane coupling agents on the elastic recovery rate of the nano-silica crack pouring sealant.
FIG. 5 shows the effect of different amounts of modified nano-silica on the penetration of joint sealant.
FIG. 6 shows the effect of different amounts of modified nano-silica on the softening point of crack pouring sealant.
FIG. 7 shows the effect of different amounts of modified nano-silica on the elastic recovery rate of crack pouring sealant.
FIG. 8 shows the effect of different amounts of modified nano-silica on the flow value of crack pouring sealant.
Figure 9 is a graph of the effect of different frequencies of the DSR experiment high temperature set on two crack pouring glue experiment parameters.
Figure 10 is a graph of the effect of different temperatures of the DSR experiment high temperature set on two crack sealing glue experiment parameters.
FIG. 11 is a graph of the effect of different frequencies of the low temperature group on two crack pouring glue experimental parameters in a DSR experiment.
FIG. 12 is a graph of the effect of different temperatures of the low temperature group on two crack pouring sealant experimental parameters in a DSR experiment.
Detailed Description
The technical solution of the present invention is further described below with reference to the accompanying drawings, but not limited thereto, and any modification or equivalent replacement of the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention shall be covered by the protection scope of the present invention.
The invention provides a high-performance wide-area asphalt crack pouring adhesive for roads, which is applied to asphalt crack pouring adhesives by utilizing silane coupling agents to modify nano silicon dioxide. The method specifically comprises the following steps:
first, experimental part
1. Raw materials:
no. 90 petroleum asphalt, silane coupling agents (KH550 and KH560), SBS modifiers, SBR modifiers, rubber filling oil, rubber powder and nano silicon dioxide powder.
2. The preparation method of the modified nano silicon dioxide comprises the following steps:
the nano-silica modified by KH550 is abbreviated as KHN550, and the other two types are similar.
(1) The preparation method of the KHN550 comprises the following steps: firstly, putting silicon powder into an oven for drying, then preparing KH550 aqueous solution, taking 1% by mass of coupling agent of the silicon powder, then preparing the solution according to the mass ratio of 1:4 of silane coupling agent to water, stirring by using a glass rod, and completely hydrolyzing the coupling agent after about half an hour, wherein the water is preferably pure water. And then taking a proper amount of dried silicon powder, putting the dried silicon powder into a solid stirrer, spraying the prepared KH550 solution by using a sprayer while stirring, uniformly stirring, putting into a drying oven with the temperature of 105-120 ℃ for drying for later use, and using up the coupling agent within a short time after hydrolysis, wherein the coupling agent is not effective.
(2) The preparation method of KHN560 comprises the following steps: firstly, putting silicon powder into an oven for drying, then preparing KH560 aqueous solution, firstly preparing acidic solution with pH of 3-4 by using acetic acid and water, then taking coupling agent with mass of 1% of silicon powder, then preparing solution according to the mass ratio of silane coupling agent to solution of 1:4, stirring by using a glass rod, and waiting for the coupling agent to be completely hydrolyzed, wherein the water is preferably pure water. And then taking a proper amount of dried silicon powder, putting the dried silicon powder into a solid stirrer, spraying the prepared KH560 solution by using a sprayer while stirring, uniformly stirring, putting into a drying oven with the temperature of 105-120 ℃ for drying for later use, wherein the coupling agent is required to be used up within a short time after being hydrolyzed, otherwise, the coupling agent fails.
3. And (3) testing the performance of the joint sealant:
(1) the modification effect of the silane coupling agent on the nano-silica crack pouring adhesive is researched, reference is made to road surface rubber asphalt crack pouring adhesive (JT/T740-2009), and cone penetration, softening point, fluidity, elastic recovery and low-temperature stretching experiments are carried out, wherein in the 5 indexes, the cone penetration, the softening point and the fluidity are used for evaluating the high-temperature performance of the crack pouring adhesive, the low-temperature stretching is used for evaluating the low-temperature performance of the crack pouring adhesive, and the elastic recovery experiment is used for evaluating the elastic recovery performance.
(2) The influence of the doping amount of the modified nano-silica on the performance of the crack-filling gum base is researched, except for the above 5 experiments, a segregation test is carried out, and the storage stability of the crack-filling gum base is evaluated.
(3) Dynamic shear rheological experiments are carried out by researching the influence of the modified nano silicon dioxide on the temperature adaptation range (wide range) of the crack pouring adhesive. The Dynamic Shear Rheometer (DSR) can comprehensively consider the influence of the loading condition and the temperature on the performance of the cementing material, and designs two environments of a high-temperature group and a medium-low temperature group, so that the dynamic mechanical properties of the crack pouring glue at different temperatures are comprehensively evaluated, and the actual road condition of the crack pouring glue is relatively met.
(4) The experiment is carried out by determining the mixing ratio of the modified nano-silica crack pouring sealant, applying an orthogonal experiment method and selecting 3 evaluation indexes of penetration, elastic recovery rate and softening point.
Second, results and analysis
The experimental results of the low-temperature tensile property are shown in table 1, the results of the segregation experiment are shown in table 2, the experimental parameters of the dynamic shear rheological experimental design are shown in table 3, and the orthogonal table for researching the joint sealant mixing ratio design is shown in table 4.
TABLE 1 Low temperature tensile Properties test results Table
Crack pouring glue Low temperature stretching (-10 ℃ C.) Low temperature stretching (-20 ℃ C.)
H550-10 By passing By passing
H550-5 By passing By passing
T By passing By passing
Table 2 segregation test results
Figure RE-GDA0002168472400000061
Figure RE-GDA0002168472400000071
TABLE 3 DSR Experimental parameters
Figure RE-GDA0002168472400000072
Table 4 orthogonal table for joint sealant mixing ratio design
Figure RE-GDA0002168472400000073
1. The silane coupling agent has the following modification effect on the nano silicon dioxide crack pouring adhesive:
(1) as can be seen from fig. 1-4 and table 1, compared with the common crack pouring sealant, the crack pouring sealant has the advantages that the penetration degree of the crack pouring sealant is reduced, the softening point is increased, the elastic recovery rate is obviously improved, the low-temperature stretching result meets the specification requirement, and the crack pouring sealant becomes higher in viscosity after the modified nano-silica is added. The nano silicon dioxide can be preliminarily judged to improve the high-temperature and low-temperature performances of the crack pouring adhesive, and the feasibility of developing the wide-range asphalt crack pouring adhesive by using the nano silicon dioxide is realized.
(2) The improvement of the performance of the crack pouring sealant by the amino functional group silane coupling agent KH-550 is more remarkable than that of the epoxy functional group silane coupling agent KH-560, wherein the fluidity is obviously reduced compared with KH-560, and the softening point is obviously increased, which shows that the amino functional group silane coupling agent KH-550 has obvious advantages of improving the high-temperature performance of the crack pouring sealant, and the improvement effect of the performance of the crack pouring sealant is more remarkable along with the increase of the dosage of KH-550. Through comprehensive analysis, the silane coupling agent with KH-550 and 10 percent of doping amount is finally selected as the modifier of the nano silicon dioxide.
2. Influence of modified nano silicon dioxide mixing amount on performance of crack pouring gum base
(1) As can be seen from fig. 5-8, as the doping amount of the nano-silica is increased, the penetration degree and the elastic recovery rate of the crack pouring sealant are reduced, the flow value is significantly reduced, and the softening point is increased, which indicates that the higher the doping amount of the nano-silica is, the better the high-temperature performance is, the higher the viscosity is, but after the doping amount is greater than 20%, the change of each index is not obvious, and the modified nano-silica with the doping amount of 20% is primarily determined to be used for carrying out the subsequent dynamic temperature rheological experiment.
(2) According to table 2, the data analysis performed by the software shows that when the significance level α is 0.05, there is no significant difference between the two sets of data, which proves that the processed modified nano-silica crack pouring sealant is not isolated, and the storage stability of the crack pouring sealant meets the requirement.
3. Influence of modified nano-silica on temperature adaptation range (wide range) of crack pouring sealant
The actual road state of the crack pouring glue is considered, the influence of the loading condition and the temperature on the performance of the cementing material can be comprehensively considered by selecting a Dynamic Shear Rheometer (DSR), and the dynamic mechanical property of the crack pouring glue is comprehensively evaluated. In order to detect the characteristic that the modified nano-silica crack pouring sealant is adaptive to a large temperature difference, the experiment is divided into a high-temperature group and a medium-low temperature group, the experimental parameter rules of the modified nano-silica crack pouring sealant and the common crack pouring sealant under the conditions that the environmental control temperature is in a high-temperature range and a medium-low temperature range are respectively explored, the dynamic mechanical properties of the high-temperature and medium-low temperature of the modified nano-silica crack pouring sealant are analyzed through the parameters, and the temperature adaptive range of the modified nano-silica crack pouring sealant is evaluated.
(1) Table 3 is the DSR experimental parameters determined by the analysis. The experimental parameters of the high-temperature group select storage modulus G1, loss modulus G2, complex viscosity eta, and rutting factor G x/sin as experimental parameters for evaluating high-temperature performance, G x is the measurement of total resistance of the material during repeated shear deformation, and is composed of an elastic (recoverable) part G1 and a viscous (non-recoverable) part G2, and is a relative index of the elastic and viscous deformation quantity, and the smaller the material is, the closer the material is to an elastomer, and G/sin is to represent the permanent deformation resistance of the binder. Under the condition of high design temperature, the larger G x/sin is, the better.
And the experimental parameters of the medium and low temperature groups are changed into the rutting factors of the high temperature groups to evaluate the fatigue factors G x sin at the medium and low temperatures to represent the fatigue cracking resistance. A larger G × sin indicates a greater energy loss under repeated loading. Research shows that the fatigue damage or fatigue life of the asphalt mixture has a proportional relationship with the energy loss in the cyclic loading process. Therefore, a smaller value of G × sin represents better fatigue performance. The complex viscosity represents the resistance representation of the crack pouring glue resisting internal flow under the action of dynamic external force, the complex viscosity of the high-temperature group is better, and the complex viscosity of the medium-low temperature group is better.
(2) Analysis of dynamic mechanical properties of high temperature group
As can be seen from fig. 9, with the increase of the experimental frequency, the energy storage and loss modulus of the crack pouring sealant also increase, the modified nano-silica crack pouring sealant has more excellent shear deformation resistance under the high-frequency condition (representing the low-temperature state of the sealant), and the modulus of the modified nano-silica crack pouring sealant is similar to the deformation resistance of the common crack pouring sealant under the low-frequency condition (representing the high-temperature state of the sealant).
Complex viscosity eta of modified nano-silica crack pouring sealant and common crack pouring sealant*The curves are similar, which shows that the nano silicon dioxide has no direct influence on the complex viscosity parameter of the crack pouring adhesive.
The rutting factor of the modified nano-silica crack pouring adhesive integrally accords with the trend of the same increase with frequency, the lower the control temperature is, the larger the rutting factor is, the rutting factor of the modified nano-silica crack pouring adhesive is much higher than that of common crack pouring adhesive with the same frequency at the control temperature of 35 ℃ and 50 ℃, and the rutting factor is slightly higher than that of the common silica crack pouring adhesive at the temperature of 65 ℃ and 80 ℃. The modified nano silicon dioxide can obviously improve the anti-rutting performance of the crack pouring adhesive under the medium-high temperature condition, and the performance is slightly improved under the high temperature condition.
As can be seen from fig. 10, the crack pouring adhesives E1 and E2 decrease with the increase of temperature, and the loss modulus E2 of the modified nano-silica is much higher than that of the common crack pouring adhesive at the same temperature, which indicates that after the modified nano-silica is added, the viscosity of the crack pouring adhesive is improved, and the loss modulus is significantly increased, but the higher the temperature is, the more the improvement effect of the loss modulus is less obvious. Therefore, the modified silicon dioxide can improve the viscosity of the crack pouring adhesive under the medium-high temperature condition.
Complex viscosity eta of crack pouring glue*Decreases with increasing control temperature T. The complex viscosity of the modified nano-silica crack pouring sealant at the same temperature is higher than that of the common crack pouring sealant, which also indicates that the complex viscosity of the modified nano-silica crack pouring sealant can increase the viscosity component of the crack pouring sealant.
The modified nano silicon dioxide has an effect of improving the rut factor of the crack pouring adhesive under the condition of variable temperature, but the improvement effect is reduced along with the increase of the temperature.
In conclusion, under the action of variable frequency, the improvement of the performance of the crack pouring sealant by the modified nano silicon dioxide is mainly concentrated at medium and high temperature, and is slightly improved at high temperature. In the medium-high temperature range, the storage energy and loss modulus of the crack pouring glue are increased, which shows that the deformation resistance is enhanced; the rutting factor is obviously increased, and the rutting resistance is stronger. Under the action of variable temperature, the improvement of the performance of the crack pouring adhesive by the modified nano silicon dioxide is also concentrated in a medium-high temperature range, and the loss modulus and the complex viscosity are increased, which shows that the adhesive components of the crack pouring adhesive are increased, and the track factors are increased. Therefore, the modified nano silicon dioxide can obviously improve the dynamic mechanical property of the crack pouring adhesive in a medium-high temperature range.
(3) Analysis of dynamic mechanical properties of low temperature group
As can be seen from FIG. 11, the modified nano-silica crack pouring sealant has larger E1 and E2 at about 5 ℃ than the common crack pouring sealant at the same frequency, and the E1 and E2 at 20 ℃ are similar to the common crack pouring sealant. The modified nano silicon dioxide increases the anti-deformation capability of the crack pouring adhesive in the medium and low temperature environment. The modified nano silicon dioxide increases the fatigue factor of the crack pouring adhesive at 5 ℃ and increases less at 20 ℃. Therefore, the fatigue resistance of the modified nano-silica can be improved.
As can be seen from fig. 12, the modified nano-silica increases the storage modulus and the loss modulus of the crack pouring sealant at a lower temperature, and increases the complex viscosity, that is, the strength of the crack pouring sealant is increased at a medium-low temperature, and the deformability is weaker. The fatigue factor is increased along with the reduction of the temperature, the modified nano silicon dioxide enables the fatigue factor of the crack pouring adhesive to be increased, and the fatigue resistance performance at low temperature is weaker.
In summary, the influence trend of the modified nano-silica on E1, E2, η ″, of the crack pouring sealant is similar to that of the high temperature group, and is greater than that of the common crack pouring sealant, which can indicate that the parameter property of the modified nano-silica crack pouring sealant has continuity at different temperatures, the viscosity is also high at low temperature, and the low-temperature ductility is weaker than that of the common crack pouring sealant.
(4) Comprehensive evaluation of crack pouring adhesive temperature adaptation range
Through analysis of parameter change rules of the crack pouring glue of the high-temperature group and the medium-low temperature group, the high-temperature dynamic mechanical property of the modified nano-silica is obviously better than that of the common crack pouring glue, particularly the high viscosity and the large rutting factor are found, and the problems of softening, melting, flowing, rutting and the like of the crack pouring glue can be effectively reduced when the modified nano-silica is applied to an actual high-temperature environment, particularly a continuous high-temperature environment. The viscosity and fatigue factor of the crack pouring sealant are still larger than those of the common crack pouring sealant under the low-temperature condition, and the ductility of the crack pouring sealant is reduced, so that the ductility of the crack pouring sealant can be weakened by the 20% of modified nano silicon dioxide, and the viscosity is too high. However, this does not indicate that the low temperature performance is inferior to that of the common joint compound because the good low temperature resistant material needs to be formed by higher strength and larger deformation, but the two cannot be simultaneously increased for the material. The modified nano-silica crack pouring sealant has high strength and relatively small deformation, and the low-temperature stretching of the sealant also meets the standard, so that the sealant has good applicability under the condition of low temperature, and can obtain better low-temperature performance by adjusting the material mixing ratio. In conclusion, the crack pouring adhesive can be effectively applied to regions with large annual temperature difference or day-night temperature difference, and has higher strength and longer service life.
(4) Determining an optimal mix ratio
a. Raw material selection
By combining with the existing research results, 8 materials of No. 90 matrix asphalt, rubber powder, SBS, SBR, a softening agent, a light stabilizer, an anti-aging agent and modified nano silicon dioxide are selected to prepare the crack pouring sealant.
b. Orthogonal parameter analysis
Orthogonal factors and horizontal analysis
On the surface of many researches, the optimal dosage of SBR in rubber asphalt is 3%, the proper dosage of softener is 7%, the dosages of light stabilizer and anti-aging agent are very small, the two dosages mainly influence the aging performance of crack pouring adhesive, and the dosages of SBS, nano-silica and rubber powder can obviously influence the service performance of the crack pouring adhesive, so that asphalt is used as a base material, and the dosages of rubber powder, SBS and nano-silica are used as three factors for analysis.
Under the condition of high temperature, the matrix asphalt is obviously different from rubber asphalt and various mixing amounts of rubber asphalt, the larger the mixing amount of rubber powder is, the larger the viscosity of the asphalt is, the larger the complex modulus is, the stronger the deformation resistance is, but the excessively high mixing amount of the rubber powder can influence the fluidity of the crack pouring rubber, generally the mixing amount of the rubber powder is not more than 20%, and the mixing amount of the rubber powder is selected from three levels of 10%, 15% and 20% by combining the existing experimental results.
The higher the SBS mixing amount is, the better the high-temperature performance of the crack pouring adhesive is, and the SBS mixing amount is generally 4-6%, so that a better effect can be achieved, and the SBS mixing amount is selected from three levels of 4%, 5% and 6%.
The experimental result shows that the doping amount of the nano silicon dioxide is less than 4%, the performance of the crack pouring adhesive is not obviously affected, the doping amount exceeds 15%, the consistency of the crack pouring adhesive is obviously improved, and the fluidity is reduced, so that the doping amount of the nano silicon dioxide is selected from three levels of 5%, 7.5% and 10% according to the characteristic of wide application temperature range.
Analysis of orthogonal experimental indexes
The evaluation indexes of the performance of the joint sealant include penetration, elastic recovery rate, flow value and softening point, and in addition, a low-temperature tensile experiment is required.
The flow values obtained by the fluidity test are all very small and are mostly less than 2mm, and the flow values are 1mm as a unit, and the obtained data differentiation is not enough, so the flow values are not suitable to be used as orthogonal design indexes, so three indexes of cone penetration, elastic recovery rate and softening point are selected as the orthogonal design indexes (the orthogonal table is shown in table 4).
c. Selecting the best mix and ratio
From table 4 and considering the requirement of wide adaptive temperature range, the optimal mixture ratio selected by comprehensive consideration is: rubber powder: SBS: modified nano-silica: SBR: softening agent: matrix asphalt: light stabilizer and antioxidant 15%: 6 percent; 7.5%: 3%: 7%: 60.5%: 1 percent.

Claims (5)

1. The wide-area asphalt crack pouring adhesive for the high-performance road is characterized by being prepared by mixing SBS modified asphalt crack pouring adhesive with modified nano-silica, wherein: the mixing amount of the modified nano silicon dioxide is 5-10% of the total mass of the wide-range asphalt crack pouring adhesive; the modified nano silicon dioxide is prepared by modifying nano silicon powder with an amino functional group silane coupling agent, and the using amount of the amino functional group silane coupling agent is 5-15% of the mass of the nano silicon powder.
2. The wide-area asphalt crack pouring sealant for the high-performance road according to claim 1, wherein the doping amount of the modified nano-silica is 7.5% of the total mass of the wide-area asphalt crack pouring sealant.
3. The wide-range asphalt crack pouring sealant for the high-performance road according to claim 1, wherein the optimal dosage of the amino functional group silane coupling agent is 10% of the mass of the nano silicon powder.
4. The wide-area asphalt crack pouring sealant for the high-performance road according to claim 1, wherein the SBS modified asphalt crack pouring sealant is prepared from rubber powder, an SBS modifier, an SBR modifier, a softener, matrix asphalt, a light stabilizer and an anti-aging agent.
5. The wide-area asphalt crack pouring adhesive for the high-performance road according to claim 4, which is characterized in that the optimal matching mass ratio of the wide-area asphalt crack pouring adhesive is rubber powder: SBS modifier: modified nano-silica: SBR modifier: softening agent: matrix asphalt: light stabilizer and antioxidant = 15%: 6 percent; 7.5%: 3%: 7%: 60.5%: 1 percent.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63199757A (en) * 1987-02-16 1988-08-18 Yoshiyuki Ogushi Lining material containing asphalt emulsion and acrylic ester copolymer
CN102093729A (en) * 2011-01-05 2011-06-15 东南大学 Nano particle modified asphalt and preparation method thereof
CN103421467A (en) * 2013-08-16 2013-12-04 山西喜跃发路桥建筑材料有限公司 High-performance rubber asphalt pouring sealant and preparation method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63199757A (en) * 1987-02-16 1988-08-18 Yoshiyuki Ogushi Lining material containing asphalt emulsion and acrylic ester copolymer
CN102093729A (en) * 2011-01-05 2011-06-15 东南大学 Nano particle modified asphalt and preparation method thereof
CN103421467A (en) * 2013-08-16 2013-12-04 山西喜跃发路桥建筑材料有限公司 High-performance rubber asphalt pouring sealant and preparation method thereof

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