CN101864181A - CDE (diatom complex) modified asphalt and preparation method thereof - Google Patents
CDE (diatom complex) modified asphalt and preparation method thereof Download PDFInfo
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- CN101864181A CN101864181A CN200910094357A CN200910094357A CN101864181A CN 101864181 A CN101864181 A CN 101864181A CN 200910094357 A CN200910094357 A CN 200910094357A CN 200910094357 A CN200910094357 A CN 200910094357A CN 101864181 A CN101864181 A CN 101864181A
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Abstract
The invention relates to CDE (diatom complex) modified asphalt used for roads and a preparation method thereof. The modified asphalt is prepared by heating ordinary asphalt to 150-160 DEG C, and then adding a diatom complex asphalt modifier and stirring for 20min to uniformly mix the asphalt and the modifier. The modified asphalt is added to a mixed material of blended asphalt concrete and then heated to 160-165 DEG C to prepare modified asphalt concrete for paving and constructing various road surfaces. After the CDE (diatom complex) modified asphalt is used for a road surface, the asphalt road surface can have no floating or softening at high temperature of 60 DEG C and have no embrittlement at low temperature of 37 DEG C below zero. The modified asphalt obviously improves the high temperature stability and the low temperature crack resistance, improves the flood damage resistance, avoids early damages, and enables the road to have abrasion resistance, skid resistance and semi-gloss so as to improve the road service life and the traveling safety. The modified asphalt product has low price, simple process and convenient operation and is economical, practical and domesticated modified asphalt which is completely an indigenous resource.
Description
Affiliated technical field
The present invention relates to a kind of domestic native resource high performance modified bitumen that is used for road.
Technical background
Pitch is a kind of typical viscoelastic materials, and the quality of its temperature sensitivity and the conformability of allocating into for gathering materials directly influence its road effect.In order to reduce the bituminous temperature sensitivity and to improve its adaptability to gathering materials, improve bituminous high-temperature stability, low-temperature cracking-resistance and water stability, anti-fatigue performance, usually adopt the asphalt modification technology, wherein most widely used is to do asphalt modifier with SBS (stupid ethene-divinyl-stupid ethylene block copolymer), or is processed as the SBS modifying asphalt.Though can significantly improve bituminous high-temperature stability and low-temperature cracking-resistance and water stability, cost an arm and a leg the modified technique complexity with the SBS modifying asphalt, facility investment is big, and easily disintegrate, limited to some extent to the gather materials adaptability of compatibility of bituminous concrete, therefore apply being restricted.
Summary of the invention
The objective of the invention is: provide that a kind of raw material sources are wide, price is low, technology is easy, the road is with modifying asphalt effective, substitute expensive high molecular polymer preparation with the inorganic ore deposit of cheapness.With this compound CDE modifying asphalt, the bituminous adhesivity is good especially, SiO
2＞85%～90% acidity aggregate needn't use antistripping agent, can avoid the pitch early fatigue aging, and adhesivity can reach 5 grades, and 60 ℃ of high temperature are not softening, low temperature-37 ℃ not embrittlement, good endurance.
The present invention is achieved in that it is to heat with the common bitumen for road use of non-modified to mix diatom complex asphalt modifier suitable stirring in corresponding container to 150～160 ℃ and form.
Modified asphalt preparation method of the present invention is: it is qualified to confirm after testing with plain asphalt with the road of non-modified, after in general pitch is heated container, heating required plain asphalt to 150～160 ℃, add diatom complex asphalt modifier (asphalt content) 8%～12%, wherein properties-correcting agent contains diatom bioprotein stone 30%～52%, metakaolinite 12%～15%, sulphur 15%～25% calcium hydroxide 20%～30%, silicate 5%～10%, natural rock asphalt 30%～48%.
This CDE (diatom complex) modified asphalt preparation method is: the road must be qualified through experimental examination with plain asphalt, properties-correcting agent must be dried and be made moisture content≤2%, but in-situ processing is with making with usefulness, to park when can not be in high temperature 〉=120 ℃ long, the time spent must reach a high temperature 〉=stirs 150 ℃～160 ℃ the time.The preparation modified asphalt concrete must be got best bitumen aggregate ratio and the best through the proportioning design experiment and mix dosage and test detection again, and it is good and influence the modifying asphalt actual effect to avoid proportioning.
The modifying asphalt that makes with the present invention has following advantage: (1) raw material sources are wide, and price is lower than SBS, are the domestic native country low-cost resource of gathering materials on the spot entirely, produce and application art all comparatively simple, meet China's actual conditions; (2) can replace equivalent pitch, reduce production costs; (3) composite diatom bioprotein stone adsorptivity is fabulous, and poisonous, the obnoxious flavour that give out in the energy adsorptive pitch heat-processed help the healthy and environment protection of workman; (4) reduce by 20%～35% with the pavement skid resistance of CDE modifying asphalt shop, wear-resisting, inferior light, caloric receptivity, thermal conductivity descends 40%～50%, so temperature sensitivity reduces greatly, causes bellding not in road surface summer, not embrittlement in winter can improve highway work-ing life and traffic safety greatly; (5) main road reaches 4000～6400 times/mm with function technical indicator dynamic stability, is higher than country's " standard " (JTG F40-2004) and requires more than 1～2 times.
Provide embodiments of the invention below, it is not construed as limiting the present invention.
Embodiment
(1) gets AH-70 road heavy traffic paving asphalt 8.8kg, be heated to 160 ℃, add diatom complex asphalt modifier 1.2kg, stir 20min, make modifying asphalt 10kg.Press the thick type close-graded AC-16C asphalt of bitumen aggregate ratio 4.9% preparation, every after measured index such as table 1.
From the test result of table 1 as can be seen, every performance technologies index all is higher than current specifications (JTGF40-2004) specified requirement, illustrates that modifying asphalt is respond well.
AC-16C modified asphalt mixture test-results
Claims (4)
1. one kind is used for CDE (diatom complex) modifying asphalt of road and preparation method thereof, it is characterized in that this modifying asphalt is added the diatomite (DiatomiteEarth vehicle economy) that contains bioprotein stone and allocates metakaolinite into through compound (complex is called for short c) by plain asphalt, sulphur, calcium hydroxide, silicate, five kinds of mineral of natural rock asphalt, make asphalt modifier (abbreviation properties-correcting agent), when heating the common bitumen for road use of non-modified to 150-160 ℃, promptly make CDE (diatom complex) modifying asphalt after being added into the suitable stirring of properties-correcting agent, be called for short the CDE modifying asphalt.
2. according to right 1 described a kind of CDE (diatom complex) modifying asphalt that is used for road and preparation method thereof, it is characterized in that plain asphalt 88%, allocate properties-correcting agent 12% into, properties-correcting agent contains diatom bioprotein stone 30%～52%, metakaolinite 12%～15%, sulphur 15%～25%, calcium hydroxide 20%～30%, silicate 5%～10%, natural rock asphalt 30%～48%.
3. according to right 1 described a kind of CDE (diatom complex) modifying asphalt that is used for road and preparation method thereof, after it is characterized in that plain asphalt adding properties-correcting agent is made the CDE modifying asphalt, bituminous Marshall stability, immersion residual stability, freeze thawing cleavage strength ratio, anti-low-temperature cracking, anti-fatigue performance all are significantly increased, and dynamic stability improves 100%～500%.
4. according to right 1 described a kind of CDE (diatom complex) modifying asphalt that is used for road and preparation method thereof, it is characterized in that to prepare use at the construction field (site), also can cool fast to the use of remote transportation deposit below 100 ℃ in factory process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910094357A CN101864181A (en) | 2009-04-16 | 2009-04-16 | CDE (diatom complex) modified asphalt and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910094357A CN101864181A (en) | 2009-04-16 | 2009-04-16 | CDE (diatom complex) modified asphalt and preparation method thereof |
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| Publication Number | Publication Date |
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| CN101864181A true CN101864181A (en) | 2010-10-20 |
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| CN200910094357A Pending CN101864181A (en) | 2009-04-16 | 2009-04-16 | CDE (diatom complex) modified asphalt and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102849989A (en) * | 2012-09-29 | 2013-01-02 | 长安大学 | Hot-mixed and hot-paved modified asphalt mixture with reduced emission and preparation method of asphalt mixture |
| CN105693126A (en) * | 2016-01-29 | 2016-06-22 | 宝钢发展有限公司 | Asphalt filler containing light burned dolomite lime and preparation method thereof |
| CN109722042A (en) * | 2017-12-19 | 2019-05-07 | 汪德元 | CDE(diatom complex) asphalt modifier and its silicon modified asphalt preparation method |
-
2009
- 2009-04-16 CN CN200910094357A patent/CN101864181A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102849989A (en) * | 2012-09-29 | 2013-01-02 | 长安大学 | Hot-mixed and hot-paved modified asphalt mixture with reduced emission and preparation method of asphalt mixture |
| CN102849989B (en) * | 2012-09-29 | 2014-02-12 | 长安大学 | Hot-mixed and hot-paved modified asphalt mixture with reduced emission and preparation method of asphalt mixture |
| CN105693126A (en) * | 2016-01-29 | 2016-06-22 | 宝钢发展有限公司 | Asphalt filler containing light burned dolomite lime and preparation method thereof |
| CN109722042A (en) * | 2017-12-19 | 2019-05-07 | 汪德元 | CDE(diatom complex) asphalt modifier and its silicon modified asphalt preparation method |
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Addressee: Wang Deyuan Document name: Notification of Publication of the Application for Invention |
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Application publication date: 20101020 |