CN102924938A - High-modulus rubber powder composite asphalt modifying agent for regional distribution center (RDC) and preparation method thereof - Google Patents
High-modulus rubber powder composite asphalt modifying agent for regional distribution center (RDC) and preparation method thereof Download PDFInfo
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- CN102924938A CN102924938A CN 201210498701 CN201210498701A CN102924938A CN 102924938 A CN102924938 A CN 102924938A CN 201210498701 CN201210498701 CN 201210498701 CN 201210498701 A CN201210498701 A CN 201210498701A CN 102924938 A CN102924938 A CN 102924938A
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Abstract
The invention discloses high-modulus rubber powder composite asphalt modifying agent for a regional distribution center (RDC) and a preparation method thereof, and relates to a high-performance asphalt modified material for a road. The asphalt modified material is formed by adding proper quantity of excellent rock asphalt into high-loss diatomite which is prepared by blending waste tyre processing rubber powder with coal gangue of coal waste in Yunnan Xianfeng coal mine and compounding a finished product of the asphalt. The processing method comprises the following steps of: pulverizing, grinding and uniformly mixing the four raw materials according to different characteristic requirements. The modifying agent is added into matrix asphalt to increase stiffness modulus, dynamic modulus and permeability of road asphalt, reduce poor stability of the asphalt due to poor dispersion of the rubber powder in the asphalt, obvious networking and poor interfacial compatibility, reduce the phenomenon that the asphalt is stirred at high temperature to give out the toxic and harmful substance of the asphalt smoke, and obviously improve high-temperature stability, low-temperature anti-cracking performance and water stability of the asphalt; and therefore, the high-modulus rubber powder composite asphalt modifying agent is good in comprehensive effect, low in price, wide in adaptability, environment-friendly, energy-saving and high in quality.
Description
Affiliated technical field
The present invention relates to a kind of high-performance modified asphalt material for highway.
Technical background
China will be by the end of the year 2011, the whole nation is built up total mileage of highway and is reached 410.64 ten thousand kilometers, wherein motorway is 8.49 ten thousand kilometers, finished the whole year in 2011 12596.36 hundred million yuan of investments in highway building, 2011 annual bi tumenf orr oad up to grade ratio of selective samples 43.8%, national standard highway is bituminous pavement more than 80%, breaking of pitch surface in early stage is serious for a long time, service life of road surface does not generally reach design requirements, and it is beyond measure to expend highway investment.The way that improves the quality of road asphalt performance is to produce preferably that asphalt modifier prepares modifying asphalt, wherein most widely used is SBS (vinylbenzene---divinyl---styrene block copolymer), expensive because of it, complex process, even still need add stable, antistripping auxiliary material etc. and improve its performance, be difficult to penetration and promotion and use.Therefore, develop cheap price and excellent quality, technique simply even can utilize renewable resource, be conducive to environmental protection and energy saving, the modified asphalt material of better effects if has become the task of top priority that adapts to development in science and technology.The compound diatomite of application of rubber powder, rock asphalt, coal-tar pitch are made novel asphalt material modified enhancing bitumen stiffness modulus and are improved dynamic modulus and strengthen perviousness, emphasis changes rubber powder poor dispersion in pitch, networking obviously, the poor Bituminous stabilized that causes of interface compatibility is poor, 180～200 ℃ of high temperature of tradition stirred and cause easily ageing of asphalt in long-time about 1 hour when particularly changing the making rubber powder modified asphalt, discharge easily " glance coal " and distribute benzopyrene, Dioxins, the a-firpene, the shortcomings such as H2S poisonous and harmful carcinogenic substance.The particle diameter that diatomite is very little and very large specific surface area have good dispersiveness and consistency in pitch, pitch rutting resistance when high temperature is strengthened, stiffness modulus becomes large during low temperature, the diatomite nano microvoid structure makes pitch produce heat insulation thermal resistance and very strong adsorptivity, can reduce hazardous and noxious substances and discharge, can slow down the pitch fatigue aging; Rock asphalt can improve the pitch dynamic modulus; Coal-tar pitch can strengthen the pitch perviousness, is that pitch is used for the indispensable important source material in road surface, and above-listed raw material Application of composite realizes having complementary advantages, and maximizes favourable factors and minimizes unfavourable ones, and makes the obvious reinforcement of the comprehensive pavement performance of pitch namely become feature of the present invention.Use pitch and the asphalt concrete compound of the present invention's preparation, can obviously improve its stability and road effect, its technical indicator can reach country's (JTG F40-2004) standard comprehensively, and the properties-correcting agent price is SBS 1/5th, and processing and application art are simpler.
Summary of the invention
The present invention uses reclaiming resource junked tire and is processed into rubber powder, use simultaneously the Xun Dianxian pioneer of Yunnan Province coal mining and (now piled up tens million of tons as the coal gangue of waste discharge for a long time, not even a blade of grass grows for the accumulation scope, Environmental Ecological Balance is had a strong impact on), make high loss of ignition diatomite through the calcining purification.Above-mentioned renewable resource rubber powder (Rubber powder) and diatomite (Diatomite) are made the present invention's " RDC high-modulus rubber powder composite asphalt modifier " material with rock asphalt, coal-tar pitch compound (Complex), make its multiple can be to the mutual supplement with each other's advantages of can maximizing favourable factors and minimizing unfavourable ones of the raw material of asphalt modification, relatively use certain single starting material to the highway asphalt modification, its over-all properties is greatly improved, and production application energy consumption and cost are obviously descended.
The method that the present invention realizes is:
(1) requiring to pulverize with the junked tire powder is the selective application of 40-80 order fineness scope, and quality standard requires to meet table 1.
Table 1 road rubber powder physical and chemical index (highway scientific research institute of the Ministry of Communications)
(2) the waste coal gangue that discharges with the first-selected Xun Dianxian pioneer of the Yunnan Province coal mining of diatomite, it is mutually better to be rich in the diatom shell product through screening, directly perceived be shallow tone tablet, look ignorant, without soil impurity, there is canescence marine alga design of scattered small flowers and plants person good, natural air drying water ratio≤8%, light weight, relative density 1.00～1.30, through entering 600～800 ℃ of kiln calcining temperature controls, make it reach the elementary high loss of ignition diatomite requirement of purification, modification, activation, dilatation, dehydration, through being crushed to 325 orders, detecting its bulk density and answer≤0.5; Specific surface area 20～60m
2/ g; Diatom shell content about 70%, amorphousness SiO
2Content 〉=65%;
(3) use the high-quality rock asphalt, ash content≤10%;
(4) with high-quality road coal-tar pitch.
More than four kinds of raw materials be by weight: rubber powder 50%-75%; Diatomite 20%-40%, rock asphalt 10-30%, coal-tar pitch 5-10%, mixing and stirring namely gets properties-correcting agent of the present invention.Be lined with the interior encapsulation of the degradable plastics textile bag fore shaft that the waterproofing membrane bag adds the outer cover packing in packing into immediately.Indicate name of product, every bag of weight, operative norm, production unit, address, telephone number, date manufactured, by-product inspection certificate, working instructions, the files such as precaution.
The present invention is used for modifying road asphalt, and consumption is pitch content 8-20%; Compound ratio 4 ‰-10 ‰; It is pitch to be boiled to heat up reach 180 ℃ that wet method is made rubber powder modified asphalt, add properties-correcting agent of the present invention, stir the rubber powder swelling grown, rubber powder high-modulus modifying asphalt, make the construction of can paving the way of asphalt concrete compound with the asphalt concrete mixing equipment is supporting; Dry process rubber powder high-modulus asphalt concrete mixed material, that the asphalt concrete aggregate is heated when reaching 180 ℃, when spraying into 180 ℃ of heated bitumen mixs properties-correcting agent of the present invention being added heat simultaneously mixes, delay time after 1 minute discharging rubber powder high-modulus asphalt concrete mixed material, in-situ processing should be used for the making bituminous pavement immediately, and asphalt concrete can not be deposited cooling and use.
The asphalt modifier that makes with the present invention has following characteristics: (1) raw material sources are wide, waste rubber powder and high loss of ignition diatomite all are to reclaim the sharp useless raw material of resource, be conducive to environmental protection and the eubiosis, the raw produce; raw products price is cheap especially, and the properties-correcting agent product only is 1/5th of high molecular polymer SBS market price.The toxic and harmful that produces when (2) composite nanometer micropore raw material diatomite energy adsorptive pitch and rubber powder are heated, the asphalt concrete caloric receptivity reduces 10-20%, thermal conductivity decline 20-30%, temperature sensitivity reduces greatly, and the heat insulation thermal resistance antifatigue of asphalt concrete resistance of aging improves greatly.(3) test mixture detection Marshall stability obviously improves, and water stability and anti-rut dynamic stability technical indicator improve outstanding especially, and the heavy traffic paving asphalt road surface of the original product construction of the present invention stood intact in 13 years so far.
The below provides the specific embodiment of the invention, and it is not construed as limiting the present invention.
Embodiment
(1) gets 60 order rubber powder 500g; 325 order diatomite 300g; 200 order rock asphalt 140g; 200 order coal-tar pitch 60g; Mix and namely get high-modulus rubber powder composite asphalt modifier 1000g of the present invention.
(2) get AH-70 heavy traffic paving asphalt 8.3kg, be heated to 180 ℃, add asphalt modifier 1.7kg of the present invention, stir 45min, just make modifying asphalt 10kg, press bitumen aggregate ratio 5.3% preparation AC-13C asphalt, content of modifier is pitch 17%, be compound 9 ‰, after measured property indices such as table 2.Can find out that from the test result of table 2 property indices all is higher than current specifications (JTG F40-2004) requirement, illustrates that asphalt modification is respond well.
Table 2AC-13C modified asphalt mixture test-results
(3) with high-modulus rubber powder composite asphalt modifier and AH-70 heavy traffic paving asphalt, bitumen aggregate ratio 5.3%, properties-correcting agent account for 17% of pitch, mix to join to fry and mix the about 8000m of AC-13C asphalt shop Experiment Road 1000m
2, properties is good after tested, has been open to traffic 13 years, and existing road surface is all right without damaged.
Claims (4)
1.RDC high-modulus rubber powder composite asphalt modifier and preparation method thereof, it is characterized in that rubber powder (Rubber powder is called for short R) and diatomite (Diatomite is called for short D), rock asphalt, coal-tar pitch compound (Complex is called for short C), these four kinds of raw materials are made respectively powdery, mixing and stirring, namely get RDC high-modulus rubber powder composite asphalt modifier product of the present invention, be called for short the RDC asphalt modifier; This properties-correcting agent product is added uniform mixing in 180 ℃ of high temperature heated bitumens, make rubber powder produce the degraded swelling in pitch, this prepares RDC high-modulus rubber powder composite modified asphalt for wet method, is called for short the RDC modifying asphalt.
2. according to right 1 described RDC high-modulus rubber powder composite asphalt modifier and preparation method thereof, it is characterized in that by weight application of rubber powder 50～75% diatomite 20～40%, rock asphalt 10～30%, coal-tar pitch 5～10% 4 kind of basic raw material.
3. according to right 1 described RDC high-modulus rubber powder composite asphalt modifier and preparation method thereof, it is characterized in that to prepare at the construction field (site) use, also can use at factory process long distance transportation deposit, can use the wet processes modifying asphalt, also can make the asphalt concrete compound with dry process.
4. according to right 1 described RDC high-modulus rubber powder composite asphalt modifier and preparation method thereof, it is characterized in that wet method is made rubber powder modified asphalt or dry method is made the rubber powder modified asphalt concrete mixed material, Marshall stability, immersion residual stability, freeze thawing Ratio of split strength, dynamic stability, anti-low-temperature cracking, the anti-rut of high temperature and antifatigue ageing resistance all are significantly increased.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103360773A (en) * | 2013-07-18 | 2013-10-23 | 华南理工大学 | Composite asphalt modifier, its preparation method and application |
| CN104478355A (en) * | 2014-11-28 | 2015-04-01 | 深圳市公路交通工程试验检测中心 | Environment-friendly cold-mixing modulus-adjustable pavement material and preparation method thereof |
| CN105400220A (en) * | 2015-11-11 | 2016-03-16 | 西南科技大学 | High-modulus rubber asphalt and preparation method thereof |
| CN106398239A (en) * | 2015-11-27 | 2017-02-15 | 梁清源 | Novel anti-rutting agent and preparation method thereof |
| CN108084722A (en) * | 2017-12-28 | 2018-05-29 | 安徽宏实光机电高科有限公司 | Powder compound modified ageing-resistant pitch of a kind of diatomite-rubber of nano zine oxide filling and preparation method thereof |
| CN108342090A (en) * | 2017-12-20 | 2018-07-31 | 深圳市海绵城市科学研究院 | Diatom test asphalt modifier and its modified composite asphalt and preparation process |
-
2012
- 2012-11-29 CN CN 201210498701 patent/CN102924938A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103360773A (en) * | 2013-07-18 | 2013-10-23 | 华南理工大学 | Composite asphalt modifier, its preparation method and application |
| CN103360773B (en) * | 2013-07-18 | 2015-09-02 | 华南理工大学 | A kind of composite asphalt modifier and preparation method thereof and application |
| CN104478355A (en) * | 2014-11-28 | 2015-04-01 | 深圳市公路交通工程试验检测中心 | Environment-friendly cold-mixing modulus-adjustable pavement material and preparation method thereof |
| CN105400220A (en) * | 2015-11-11 | 2016-03-16 | 西南科技大学 | High-modulus rubber asphalt and preparation method thereof |
| CN106398239A (en) * | 2015-11-27 | 2017-02-15 | 梁清源 | Novel anti-rutting agent and preparation method thereof |
| CN108342090A (en) * | 2017-12-20 | 2018-07-31 | 深圳市海绵城市科学研究院 | Diatom test asphalt modifier and its modified composite asphalt and preparation process |
| CN108084722A (en) * | 2017-12-28 | 2018-05-29 | 安徽宏实光机电高科有限公司 | Powder compound modified ageing-resistant pitch of a kind of diatomite-rubber of nano zine oxide filling and preparation method thereof |
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Application publication date: 20130213 |