CN104046043A - Composite modified asphalt for coastal granite distribution areas and preparation method thereof - Google Patents
Composite modified asphalt for coastal granite distribution areas and preparation method thereof Download PDFInfo
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- CN104046043A CN104046043A CN201410163594.8A CN201410163594A CN104046043A CN 104046043 A CN104046043 A CN 104046043A CN 201410163594 A CN201410163594 A CN 201410163594A CN 104046043 A CN104046043 A CN 104046043A
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Abstract
The invention relates to composite modified asphalt for coastal granite distribution areas and a preparation method thereof. Raw materials of the composite modified asphalt contain, by weight, 1-10% of nano-calcium carbonate, 3-15% of rock asphalt and the balance matrix asphalt. By the use of the composite modified asphalt, adhesiveness of granite and asphalt and high-temperature performance of asphalt can be raised. The composite modified asphalt is suitable for weather conditions of coastal granite distribution areas in China and local rock distributions. According to the invention, cost is saved; it is beneficial to environmental protection; compatibility of a modifier and asphalt is raised; and aging of the modified asphalt during the preparation process is reduced such that adherence level of granite and asphalt is raised to level five. Thus, granite can widely be applied in engineering.
Description
Technical field
The present invention relates to a kind of coastal grouan Distribution Area specific complex modifying asphalt and preparation method thereof, belong to modified asphalt technology field.
Background technology
China's expanding economy, bring increasing rapidly of China's traffic transport industry, occur that the volume of traffic is large, Heavy Traffic, for the coastal south, rainfall amount is large, and summer temp is relatively high, these transportation conditions and weather condition, cause a lot of highways of south China to occur rut and Moisture Damage phenomenon.Want to improve high temperature and the water stability of asphaltic road-mix surface course, will improve the performance of pitch, improve pitch and the adhesion property of gathering materials.
Coastal areas of southern China area, grouan distribution area is wide, divide by the content of silicon-dioxide, grouan belongs to persilicic rock, with the poor adhesion of pitch, and southern high-temperature, rainy, so poor as the water stability of the asphalt gathering materials with grouan, thereby grouan application is restricted, engineering is with conventional slaked lime as properties-correcting agent now, but adhere to, the highest grade can only reach 3 grades.Grouan is compared with limestone conventional in engineering, and hardness is large, and wear resistance is good, if the grouan of coastland can use as ground surface material, conveniently gathers materials on the spot, and can reduce construction costs, cost-saving, improves Pavement Performance.Simultaneously, the coastal south, summer temp is high, requires higher to the high-temperature behavior of bituminous pavement, for improving grouan and the adhesivity of pitch and the high-temperature behavior of bituminous pavement, it is necessary that research is applicable to the required modifying asphalt of coastal areas of southern China area bituminous pavement.
The Chinese patent literature CN102010610A(patent No.: 201110002327.9) disclose a kind of SBS modifying asphalt, modifying asphalt prepared by this method, in preparation technology, matrix pitch Heating temperature is higher, high-temperature stirring overlong time, and pitch is easily aging, simultaneously, properties-correcting agent SBS price is high, and prepared modifying asphalt price is high, and in engineering, widespread use is restricted.
The Chinese patent literature CN102558884A(patent No.: 201110448887.7) disclose a kind of modifying asphalt; it is the modifying asphalt of preparing as properties-correcting agent with natural rock asphalt; this modifying asphalt; because properties-correcting agent only has rock asphalt; in improving pitch softening point; do not improve improving grouan and asphalt adhesion, thereby this modifying asphalt is not suitable for coastal grouan Distribution Area.
Summary of the invention
For the deficiencies in the prior art; the invention provides a kind of coastal grouan Distribution Area specific complex modifying asphalt; this composite modified asphalt is for the special rock distribution condition in coastal grouan Distribution Area; improve the high-temperature behavior of pitch; improve the adhesivity of grouan and pitch; cost is low simultaneously, in engineering, has wide practical use.
Term explanation:
Coastal grouan Distribution Area, refer in 1 year >=8 DEG C of accumulated temperature more than 4000 DEG C, the annual rainfall tropical and subtropical region that is greater than 800 millimeters, mainly comprise the areas such as Shandong, Fujian, Guangdong, Guangxi in China.
Technical scheme of the present invention is as follows:
A kind of coastal grouan Distribution Area specific complex modifying asphalt, the raw material percent by weight of this composite modified asphalt is as follows:
Nano-calcium carbonate 1～10%;
Rock asphalt 3～15%;
All the other are matrix pitch, and described nano-calcium carbonate is the nano-calcium carbonate after activation, and the particle diameter of the nano-calcium carbonate after activation is 50～200nm.
The present invention is preferred, and the particle diameter of described rock asphalt is 75～150 microns.
The present invention is preferred, and described nano-calcium carbonate addition is: 5～7%.
The present invention is preferred, and described rock asphalt addition is: 5～7%.
The present invention is preferred, and matrix pitch is No. 70 pitches.
The present invention also provides a kind of coastal grouan Distribution Area specific complex modifying asphalt, comprises that step is as follows:
Matrix pitch is heated to 140～170 DEG C; add successively nano-calcium carbonate, rock asphalt; stir 10～30 minutes with the rotating speeds of 300～400 revs/min; then in the baking oven of 130～160 DEG C, be incubated 1～2 hour; stir 10～30 minutes with the rotating speed of 300～400 revs/min again, make coastal grouan Distribution Area specific complex modifying asphalt.
The temperature of matrix pitch heating of the present invention only has 140～170 DEG C, the temperature of growing in baking oven reduces 10-20 DEG C than the temperature of heating, avoid aging at the process medium pitch of preparing modifying asphalt, in baking oven, grown for some time, further improved the consistency of properties-correcting agent and matrix pitch.
The present invention's nano-calcium carbonate used is particle diameter 50～200nm, and particle is little, is uniformly dispersed, nano-calcium carbonate after activation can adsorb grouan surface, make grouan surface present alkalescence, improved the adhesivity of grouan and pitch, adhere to grade and be up to 5 grades.
Nano-calcium carbonate after the present invention's activation is prior art, and Shandong Haize Nano Material Co., Ltd. is on sale.
Advantage of the present invention is as follows:
1, nano-calcium carbonate particles of the present invention is little, easily disperses, and activation treatment has been passed through on surface, better with bitumen compatibility, rock asphalt belongs to rock asphalt, similar to matrix pitch component, so consistency is better, for further improving consistency, grow 1-2 hour in the baking oven the inside of certain temperature.This composite modified asphalt, can improve the adhesivity of grouan and pitch and the high-temperature behavior of pitch, is applicable to the weather condition of China coast grouan Distribution Area and local rock distribution, cost-saving, is conducive to environment protection.
2, the preparation method of composite modified asphalt of the present invention, adopt high-temperature stirring 10～30 minutes, at the temperature than the low 10-20 of whipping temp DEG C, be incubated 1～2 hour, then high-temperature stirring 10～30 minutes, improve the consistency of properties-correcting agent and pitch, reduced aging in preparation process of modifying asphalt simultaneously.
3, composite modified asphalt of the present invention, on the basis that adds rock asphalt, has added nano-calcium carbonate simultaneously, makes the adhesion grade of grouan and pitch bring up to 5 grades, thereby makes the grouan can widespread use in engineering.
Embodiment
Below in conjunction with embodiment, the invention will be further described, but be not limited to this.
Raw material in embodiment: pitch is Shandong 70# pitch, purchased from Qilu Petrochemical Company.After activation, nano-calcium carbonate is purchased from Shandong Haize Nano Material Co., Ltd., and rock asphalt is purchased from the auspicious pitch of Weifang Hao Science and Technology Ltd.
Embodiment 1
By Shandong 70# asphalt heating to 160 DEG C, add 2%(to account for matrix pitch quality percentage) nano-calcium carbonate, add 6%(to account for matrix pitch quality percentage) rock asphalt, high-speed stirring 15 minutes, the baking oven of putting into 150 DEG C is incubated 1 hour, take out rear stirring 15 minutes, prepare composite modified asphalt.32～37 DEG C of temperature, relative air humidity is under 60-70% condition, records the three norms of pitch after the adhesion grade of modifying asphalt and grouan and modification in table 1.
Table 1
Embodiment 2
By Shandong 70# asphalt heating to 160 DEG C, add 4%(to account for matrix pitch quality percentage) nano-calcium carbonate, add 6%(to account for matrix pitch quality percentage) rock asphalt, high-speed stirring 15 minutes, the baking oven of putting into 150 DEG C is incubated 1 hour, take out rear stirring 15 minutes, prepare composite modified asphalt.32～37 DEG C of temperature, relative air humidity is under 60-70% condition, records the three norms of pitch after the adhesion grade of modifying asphalt and grouan and modification in table 2.
Table 2
Embodiment 3
By Shandong 70# asphalt heating to 160 DEG C, add 6%(to account for matrix pitch quality percentage) nano-calcium carbonate, add 6%(to account for matrix pitch quality percentage) rock asphalt, high-speed stirring 15 minutes, the baking oven of putting into 150 DEG C is incubated 1 hour, take out rear stirring 15 minutes, prepare composite modified asphalt.32～37 DEG C of temperature, relative air humidity is under 60-70% condition,
Record the three norms of pitch after the adhesion grade of modifying asphalt and grouan and modification in table 2.
Table 3
From finding out table 1～3 above, along with nano-calcium carbonate calcium contents increases, the adhesion grade of grouan and pitch improves, nano-calcium carbonate after activation can adsorb grouan surface, make grouan surface present alkalescence, improve the adhesivity of grouan and pitch, be 6% at the dosage of nano-calcium carbonate, when the dosage of rock asphalt is 6%, adhesion grade reaches and is up to 5 grades, softening temperature reaches 59 DEG C, improve the adhesivity of grouan and pitch, improved the high-temperature behavior of pitch simultaneously, make modifying asphalt of the present invention be applicable to the weather condition of China coast grouan Distribution Area and local rock distribution.
Rock asphalt of the present invention, produces in batches, and cost is relatively low, and the composite modified asphalt cost preparing is low, for the coastal or wider area of southern coastal grouan distribution area, has broad application prospects.
Claims (6)
1. a coastal grouan Distribution Area specific complex modifying asphalt, the raw material percent by weight of this composite modified asphalt is as follows:
Nano-calcium carbonate 1～10%;
Rock asphalt 3～15%;
All the other are matrix pitch, and described nano-calcium carbonate is the nano-calcium carbonate after activation, and the particle diameter of the nano-calcium carbonate after activation is 50～200nm.
2. coastal grouan according to claim 1 Distribution Area specific complex modifying asphalt, is characterized in that, the particle diameter of described rock asphalt is 75～150 microns.
3. coastal grouan according to claim 1 Distribution Area specific complex modifying asphalt, is characterized in that, described nano-calcium carbonate addition is: 5～7%.
4. coastal grouan according to claim 1 Distribution Area specific complex modifying asphalt, is characterized in that, described rock asphalt addition is: 5～7%.
5. coastal grouan according to claim 1 Distribution Area specific complex modifying asphalt, is characterized in that, matrix pitch is No. 70 pitches.
6. a coastal grouan claimed in claim 1 Distribution Area specific complex modifying asphalt, comprises that step is as follows:
Matrix pitch is heated to 140～170 DEG C; add successively nano-calcium carbonate, rock asphalt; stir 10～30 minutes with the rotating speeds of 300～400 revs/min; then in the baking oven of 130～160 DEG C, be incubated 1～2 hour; stir 10～30 minutes with the rotating speed of 300～400 revs/min again, make coastal grouan Distribution Area specific complex modifying asphalt.
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| CN201410163594.8A CN104046043A (en) | 2014-04-22 | 2014-04-22 | Composite modified asphalt for coastal granite distribution areas and preparation method thereof |
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| CN201410163594.8A CN104046043A (en) | 2014-04-22 | 2014-04-22 | Composite modified asphalt for coastal granite distribution areas and preparation method thereof |
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Citations (6)
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|---|---|---|---|---|
| KR100641021B1 (en) * | 2005-10-19 | 2006-11-01 | 인해엔지니어링(주) | Composition of good water proof and moisture transpiration |
| CN101475333A (en) * | 2008-11-25 | 2009-07-08 | 当阳市公路管理段 | Asphalt antistripping agent |
| CN101481504A (en) * | 2009-01-21 | 2009-07-15 | 山东海泽纳米材料有限公司 | Preparation of active nano calcium carbonate composite modified asphalt material |
| CN101531819A (en) * | 2009-05-05 | 2009-09-16 | 江西赣粤高速公路股份有限公司 | RS2000 anti-rutting modified asphalt processing technic |
| CN102942795A (en) * | 2012-12-03 | 2013-02-27 | 中国路桥工程有限责任公司 | Novel high-performance cooperative system flame retarding asphalt |
| CN103360003A (en) * | 2013-07-10 | 2013-10-23 | 杨林江 | Cement asphalt mortar added with nanometer material |
-
2014
- 2014-04-22 CN CN201410163594.8A patent/CN104046043A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100641021B1 (en) * | 2005-10-19 | 2006-11-01 | 인해엔지니어링(주) | Composition of good water proof and moisture transpiration |
| CN101475333A (en) * | 2008-11-25 | 2009-07-08 | 当阳市公路管理段 | Asphalt antistripping agent |
| CN101481504A (en) * | 2009-01-21 | 2009-07-15 | 山东海泽纳米材料有限公司 | Preparation of active nano calcium carbonate composite modified asphalt material |
| CN101531819A (en) * | 2009-05-05 | 2009-09-16 | 江西赣粤高速公路股份有限公司 | RS2000 anti-rutting modified asphalt processing technic |
| CN102942795A (en) * | 2012-12-03 | 2013-02-27 | 中国路桥工程有限责任公司 | Novel high-performance cooperative system flame retarding asphalt |
| CN103360003A (en) * | 2013-07-10 | 2013-10-23 | 杨林江 | Cement asphalt mortar added with nanometer material |
Non-Patent Citations (5)
| Title |
|---|
| HAO XIUHONG ET.AL: ""A Study on Improving the Adhesiveness between Granite and Asphalt by Nano-scaled Calcium Carbonate"", 《KEY ENGINEERING MATERIALS》, vol. 575576, 30 September 2013 (2013-09-30) * |
| 刘大梁等: "纳米碳酸钙改性沥青研究", 《公路》, no. 06, 30 June 2005 (2005-06-30), pages 145 - 148 * |
| 李雯婵等: "岩沥青改性沥青的正交工艺优化", 《山东交通科技》, no. 05, 25 October 2009 (2009-10-25), pages 20 - 24 * |
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