CN105968851B - A kind of asphalt modifier and its application - Google Patents

A kind of asphalt modifier and its application Download PDF

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Publication number
CN105968851B
CN105968851B CN201610613907.4A CN201610613907A CN105968851B CN 105968851 B CN105968851 B CN 105968851B CN 201610613907 A CN201610613907 A CN 201610613907A CN 105968851 B CN105968851 B CN 105968851B
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pitch
asphalt modifier
asphalt
modified
modifier
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CN105968851A (en
Inventor
周新星
张翛
刘志胜
薛鹏
张艳聪
彭刚
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Shanxi Province Transport Science Research Institute
Shanxi Jiaoke Highway Survey and Design Institute
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Shanxi Province Transport Science Research Institute
Shanxi Jiaoke Highway Survey and Design Institute
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    • 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
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/34—Silicon-containing compounds
    • C08K3/36—Silica
    • 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
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/02—Elements
    • C08K3/04—Carbon
    • 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
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/08—Stabilised against heat, light or radiation or oxydation

Abstract

The invention belongs to asphalt modification technical fields, it discloses a kind of asphalt modifier and its application, the asphalt modifier is prepared by following methods: being calcined 2 hours at a high temperature of rice hull ash is placed in 550-600 DEG C, then wet grinding 4 hours, drying is to get the asphalt modifier.The raw material of the asphalt modifier is rice hull ash, and rice hull ash is not only from a wealth of sources, but also cheap, and the preparation method of the modifying agent is simple, easy to operate.The modifying agent is used for modified pitch, can not only improve the high-temperature stability of pitch, moreover it is possible to inhibit the release of pitch volatiles.

Description

A kind of asphalt modifier and its application
Technical field
The invention belongs to asphalt modification technical fields, and in particular to a kind of asphalt modifier and its application.
Background technique
Bi tumenf orr oad is in mix, paving process by high temperature action, it is easy to generate pitch volatile organic matter (VOC).It is very big to human injury containing a small amount of toxic substance and fine particle since VOC is a kind of macromolecule organic；Drip The inhibition and absorption of green VOC is concerned.Meanwhile reason asphalt is in use by temperature, illumination, air and drop The influence of the outside environmental elements such as water and the effect of vehicular load and a series of irreversible physics such as volatilization, oxidation occur and become Change and chemical change, make asphaltic nature have greatly changed, the aging of pitch is ubiquitous, and ageing of asphalt problem seriously restricts The service life of pitch.
Existing asphalt modifier does not have due to not having good compatibility between pitch so as to cause modified pitch There is good anti-aging property, and since modifying agent often only has single improvement, it is anti-ageing pitch cannot to be combined The effect for changing and inhibiting volatile matter volatilization, causes the use of asphalt anti-ageing agent and asphaltene inhibitors to be limited by very large.
Summary of the invention
In view of the above existing problems in the prior art, the present invention provides a kind of asphalt modifier and its application, the pitches The raw material of modifying agent is rice hull ash, and rice hull ash is not only from a wealth of sources, but also cheap, and the preparation method letter of the modifying agent It is single, it is easy to operate.
The modifying agent is used for modified pitch, can not only improve the high-temperature stability of pitch, moreover it is possible to inhibit pitch volatiles Release.
Realize technical solution used by above-mentioned purpose of the present invention are as follows:
A kind of asphalt modifier, is prepared by following methods:
It is calcined 2 hours at a high temperature of rice hull ash is placed in 550-600 DEG C, then wet grinding 4 hours, it is dry to get described Asphalt modifier.
Preferably, nanoscale and/or micron order SiO in the asphalt modifier2Mass percentage content be 85%- 90%, the mass percentage content of active carbon is 5%-10%.
Preferably, nanoscale and/or micron order SiO in the asphalt modifier2Mass percentage content be 89%, The mass percentage content of active carbon is 10%.
A kind of application of asphalt modifier in modified pitch.
The method of the asphalt modifier modified pitch is as follows:
Pitch is heated to 135 DEG C, after pitch is in flowable state, the asphalt modifier is added, asphalt modifier Quality is the 0.5%-2% of asphalt quality, and stirring to asphalt modifier is dispersed in pitch.
Preferably, revolving speed when stirring is 500-800 revs/min, and mixing time is 30 minutes.
Preferably, the pitch is AH70 or AH90 pitch, is matrix pitch.
Compared with prior art, the present invention its advantages and advantage are:
1) raw material of the asphalt modifier is rice hull ash, and rice hull ash is the waste that biomass power generation is carried out using rice husk, It is not only from a wealth of sources, cheap and easily-available, but also solve the problems, such as rice hull ash waste pollution environment.
2) preparation method of the asphalt modifier is simple, easy to operate, and preparation cost is low.
3) do not change existing Production Process of Modified Bitumen when the asphalt modifier use, directly replace existing pitch and change Property agent, it is easy to use, convenient for promote.
4) asphalt modifier is used for modified pitch, can not only improve the high-temperature stability of pitch, moreover it is possible to pitch be inhibited to wave Send out the release of object.Experiments have shown that using the resulting modified pitch of asphalt modifier modified pitch, 25 DEG C of needle penetration is obvious Lower than matrix pitch, softening point is apparently higher than matrix pitch, and the concentration of volatile matter is significantly lower than matrix pitch.
Detailed description of the invention
Fig. 1 is the grain size distribution of asphalt modifier prepared by embodiment 1.
Specific embodiment
The present invention is specifically described combined with specific embodiments below.
Rice hull ash used in embodiment 1-4 is to carry out the resulting waste of biomass power generation using rice husk.
Embodiment 1
A kind of asphalt modifier, is prepared by following methods:
It is calcined 2 hours at a high temperature of rice hull ash is placed in 580 DEG C, then adds water wet grinding 4 hours with high speed planetary mills, done It is dry to get the asphalt modifier.Nanoscale and/or micron order SiO in the asphalt modifier2Mass percentage content be 89%, the mass percentage content of active carbon is 10%.
Silica and active carbon are to be measured by XRF (Xray fluorescence spectrometer) to element in asphalt modifier And analysis, to measure the content of silica and active carbon.Nanoscale and the micron order composition of asphalt modifier can pass through grain Diameter is analyzed to obtain, and the grain size distribution of asphalt modifier is as shown in Figure 1, as shown in Figure 1, the partial size of the asphalt modifier is nanometer Grade (1-100nm) and micron order coexist.
Note: nanometer refers to 1-100nm, and it is because test equipment test scope is minimum that nanoscale, which does not occur, in partial size in figure Nanoscale can not occur at all in 100nm, and since nano particle is easily reunited, general dispersion means can not disperse at all, It is exactly nanometer and micron order according to grain diameter in vague definition Fig. 1 of nanometer.
Test the effect test of the asphalt modifier modified pitch of one, the present embodiment
It is illustrated by purposes of the test to the asphalt modifier of the present embodiment.
Test method:
AH70 pitch and AH90 pitch are heated respectively to 135 DEG C, after AH70 pitch and AH90 pitch are in flowable state, respectively Asphalt modifier is added, the quality of two parts of asphalt modifiers is respectively the 0.5% of AH70 pitch and AH90 asphalt quality, stirring 30min, revolving speed are 500-800 revs/min, and two parts of asphalt modifiers are dispersed in respectively in AH70 pitch and AH90 pitch, point Modified pitch A (the modified resulting modified pitch of AH70 pitch of the asphalt modifier of addition AH70 asphalt quality 0.5%) is not obtained With modified pitch B (the modified resulting modified pitch of AH90 pitch of the asphalt modifier of addition AH90 asphalt quality 0.5%).
Test result: by " highway engineering pitch and Asphalt Mixture Experiment regulation " (JTG E20-2011) test matrix drip Green and modified pitch three norms, while using the content of ultraviolet specrophotometer test pitch volatiles, test result is such as Shown in table 1:
The indices test result of 1 four class pitch of table
As shown in Table 1, compared with AH70 pitch, the concentration of volatile matter reduces 84.4% in modified pitch A, softening point 5.3% is improved, 25 DEG C of needle penetration reduces 15.3%；Compared with AH90 pitch, the concentration of volatile matter subtracts in modified pitch B Lack 82.1%, softening point improves 7.0%, and 25 DEG C of needle penetration reduces 18.6%.It can be seen that addition asphalt quality 0.5% asphalt modifier is modified resulting modified pitch to pitch, and needle penetration at 25 DEG C is substantially reduced, softening point Also it is improved, and the concentration of its volatile matter is significantly reduced.
Embodiment 2
A kind of asphalt modifier, is prepared by following methods:
Calcining 2 hours is carried out at a high temperature of rice hull ash is placed in 580 DEG C, then adds water wet grinding 4 small with high speed planetary mills When, it is dry to get the asphalt modifier.Nanoscale and/or micron order SiO in the asphalt modifier2Mass percent Content is 89%, and the mass percentage content of active carbon is 10%.
Test the effect test of the asphalt modifier modified pitch of two, the present embodiment
It is illustrated by purposes of the test to the asphalt modifier of the present embodiment.
Test method:
AH70 pitch and AH90 pitch are heated respectively to 135 DEG C, after AH70 pitch and AH90 pitch are in flowable state, respectively Asphalt modifier is added, the quality of two parts of asphalt modifiers is respectively the 1.0% of AH70 pitch and AH90 asphalt quality, stirring 30min, revolving speed are 500-800 revs/min, and two parts of asphalt modifiers are dispersed in respectively in AH70 pitch and AH90 pitch, point Modified pitch C (the modified resulting modified pitch of AH70 pitch of the asphalt modifier of addition AH70 asphalt quality 1.0%) is not obtained With modified pitch D (the modified resulting modified pitch of AH90 pitch of the asphalt modifier of addition AH90 asphalt quality 1.0%).
Test result: by " highway engineering pitch and Asphalt Mixture Experiment regulation " (JTG E20-2011) test matrix drip Green and modified pitch three norms, while using the content of ultraviolet specrophotometer test pitch volatiles, test result is such as Shown in table 2.
The indices test result of 2 four class pitch of table
As shown in Table 2, compared with AH70 pitch, the concentration of volatile matter reduces 88.9% in modified pitch C, softening point 7.7% is improved, 25 DEG C of needle penetration reduces 22.2%；Compared with AH90 pitch, the concentration of volatile matter subtracts in modified pitch D Lack 82.1%, softening point improves 8.3%, and 25 DEG C of needle penetration reduces 27.8%.It can be seen that addition asphalt quality 1.0% asphalt modifier is modified resulting modified pitch to pitch, and needle penetration at 25 DEG C is substantially reduced, softening point Also it is improved, and the concentration of its volatile matter is significantly reduced.
Embodiment 3
A kind of asphalt modifier, is prepared by following methods:
Calcining 2 hours is carried out at a high temperature of rice hull ash is placed in 580 DEG C, then adds water wet grinding 4 small with high speed planetary mills When, it is dry to get the asphalt modifier.Nanoscale and/or micron order SiO in the asphalt modifier2Mass percent Content is 89%, and the mass percentage content of active carbon is 10%.
Test the effect test of the asphalt modifier modified pitch of three, the present embodiment
It is illustrated by purposes of the test to the asphalt modifier of the present embodiment.
Test method:
AH70 pitch and AH90 pitch are heated respectively to 135 DEG C, after AH70 pitch and AH90 pitch are in flowable state, respectively Asphalt modifier is added, the quality of two parts of asphalt modifiers is respectively the 1.5% of AH70 pitch and AH90 asphalt quality, stirring 30min, revolving speed are 500-800 revs/min, and two parts of asphalt modifiers are dispersed in respectively in AH70 pitch and AH90 pitch, point Modified pitch E (the modified resulting modified pitch of AH70 pitch of the asphalt modifier of addition AH70 asphalt quality 1.5%) is not obtained With modified pitch F (the modified resulting modified pitch of AH90 pitch of the asphalt modifier of addition AH90 asphalt quality 1.5%).
Test result: by " highway engineering pitch and Asphalt Mixture Experiment regulation " (JTG E20-2011) test matrix drip Green and modified pitch three norms, while using the content of ultraviolet specrophotometer test pitch volatiles, test result is such as Shown in table 3.
The indices test result of 3 four class pitch of table
As shown in Table 3, compared with AH70 pitch, the concentration of volatile matter reduces 93.3% in modified pitch E, softening point 10.2% is improved, 25 DEG C of needle penetration reduces 27.8%；Compared with AH90 pitch, the concentration of volatile matter in modified pitch F Reduce 91.1%, softening point improves 13.1%, and 25 DEG C of needle penetration reduces 32.6%.It can be seen that addition pitch The asphalt modifier of quality 1.5% is modified resulting modified pitch to pitch, and needle penetration at 25 DEG C is substantially reduced, soft Change point to be also improved, and the concentration of its volatile matter is significantly reduced.
Embodiment 4
A kind of asphalt modifier, is prepared by following methods:
Calcining 2 hours is carried out at a high temperature of rice hull ash is placed in 580 DEG C, then adds water wet grinding 4 small with high speed planetary mills When, it is dry to get the asphalt modifier.Nanoscale and/or micron order SiO in the asphalt modifier2Mass percent Content is 89%, and the mass percentage content of active carbon is 10%.
Test the effect test of the asphalt modifier modified pitch of four, the present embodiment
It is illustrated by purposes of the test to the asphalt modifier of the present embodiment.
Test method:
AH70 pitch and AH90 pitch are heated respectively to 135 DEG C, after AH70 pitch and AH90 pitch are in flowable state, respectively Asphalt modifier is added, the quality of two parts of asphalt modifiers is respectively the 2.0% of AH70 pitch and AH90 asphalt quality, stirring 30min, revolving speed are 500-800 revs/min, and two parts of asphalt modifiers are dispersed in respectively in AH70 pitch and AH90 pitch, point Modified pitch G (the modified resulting modified pitch of AH70 pitch of the asphalt modifier of addition AH70 asphalt quality 2.0%) is not obtained With modified pitch H (the modified resulting modified pitch of AH90 pitch of the asphalt modifier of addition AH90 asphalt quality 2.0%).
Test result: by " highway engineering pitch and Asphalt Mixture Experiment regulation " (JTG E20-2011) test matrix drip Green and modified pitch three norms, while using the content of ultraviolet specrophotometer test pitch volatiles, test result is such as Shown in table 4.
The indices test result of 4 four class pitch of table
As shown in Table 4, compared with AH70 pitch, the concentration of volatile matter reduces 97.8% in modified pitch G, softening point 11.0% is improved, 25 DEG C of needle penetration reduces 30.6%；Compared with AH90 pitch, the concentration of volatile matter in modified pitch H Reduce 92.9%, softening point improves 13.6%, and 25 DEG C of needle penetration reduces 33.7%.It can be seen that addition pitch The asphalt modifier of quality 2.0% is modified resulting modified pitch to pitch, and needle penetration at 25 DEG C is substantially reduced, soft Change point to be also improved, and the concentration of its volatile matter is significantly reduced.

Claims (4)

1. a kind of asphalt modifier, it is characterised in that be prepared by following methods:
It is calcined 2 hours at a high temperature of rice hull ash is placed in 550-600 DEG C, then wet grinding 4 hours, it is dry to get the drip Green modifying agent；
The rice hull ash is to carry out the resulting waste of biomass power generation using rice husk；
Nanoscale and/or micron order SiO in the asphalt modifier2Mass percentage content be 85%-90%, active carbon Mass percentage content be 5%-10%.
2. asphalt modifier according to claim 1, it is characterised in that: in the asphalt modifier nanoscale and/or Micron order SiO2Mass percentage content be 89%, the mass percentage content of active carbon is 10%.
3. application of the asphalt modifier according to claim 1 in modified pitch, it is characterised in that the pitch changes The method of property agent modified pitch is as follows:
Pitch is heated to 135 DEG C, after pitch is in flowable state, the asphalt modifier, the quality of asphalt modifier is added For the 0.5%-2% of asphalt quality, stirring to asphalt modifier is dispersed in pitch；
Revolving speed when stirring is 500-800 revs/min, and mixing time is 30 minutes.
4. application of the asphalt modifier according to claim 3 in modified pitch, it is characterised in that: the pitch is AH70 or AH90 pitch.
CN201610613907.4A 2016-07-31 2016-07-31 A kind of asphalt modifier and its application Active CN105968851B (en)

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Publication number Priority date Publication date Assignee Title
CN110105779A (en) * 2019-04-30 2019-08-09 大连理工大学 A kind of preparation method of rice hull ash modified pitch
CN111607243A (en) * 2020-07-10 2020-09-01 上海佳砼新材料科技发展有限公司 Environment-friendly odorless asphalt composition and preparation method thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105802262A (en) * 2016-04-05 2016-07-27 长安大学 Application of rice hull ash as asphalt modifier
CN105838091A (en) * 2016-04-05 2016-08-10 长安大学 Application of combination of biomass heavy oil and rice hull ash as asphalt modifier

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105802262A (en) * 2016-04-05 2016-07-27 长安大学 Application of rice hull ash as asphalt modifier
CN105838091A (en) * 2016-04-05 2016-08-10 长安大学 Application of combination of biomass heavy oil and rice hull ash as asphalt modifier

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Evaluation of rice husk ash as filler in hot mix asphalt concrete;Sebnem Sargin et al.;《Construction and Building Materials》;20130803;第48卷;第390-397页 *

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