CN102863805A - Modified Qingchuan rock asphalt and preparation method thereof - Google Patents
Modified Qingchuan rock asphalt and preparation method thereof Download PDFInfo
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- CN102863805A CN102863805A CN2012103832250A CN201210383225A CN102863805A CN 102863805 A CN102863805 A CN 102863805A CN 2012103832250 A CN2012103832250 A CN 2012103832250A CN 201210383225 A CN201210383225 A CN 201210383225A CN 102863805 A CN102863805 A CN 102863805A
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Abstract
The invention relates to the technical field of asphalt, in particular to a modified Qingchuan rock asphalt and a preparation method thereof. The modified Qingchuan rock asphalt comprises, by weight percentage, 16-20% of Qingchuan rock asphalt and 80-84% of matrix asphalt. The invention further discloses the preparation method of the modified Qingchuan rock asphalt. Various performances of the Qingchuan rock asphalt obtained and mixed materials prepared by the Qingchuan rock asphalt are evidently improved, and particularly dynamic stability is evidently improved. The modified Qingchuan rock asphalt is high in resistance to tracks at the high temperature and quite suitable for areas with heavy-load traffic volume.
Description
Technical field
The invention belongs to field of bitumen technology, particularly a kind of Qing Chuan processes of rock asphalt modified asphalt and preparation technology thereof.
Background technology
At present, the flow deformation of bituminous pavement is modal damage of bituminous pavement phenomenon in the world.According to statistics, in the maintenance statistics on road surface, have approximately 80% to be because the deformation failure that rut causes.For addressing this problem, modifying asphalt arises at the historic moment.Traditional modifying asphalt is directly to add chemical classes properties-correcting agent (such as SBS) to realize in matrix pitch.But traditional properties-correcting agent cost is high, and energy consumption is large, so economic benefit is lower.
Rock asphalt be oil occurring in nature be subject to for a long time earth's crust extruding and form with gradually changing after air, water contact, with the petroleum pitch that natural form exists, wherein often be mixed with a certain proportion of mineral substance.Environment difference by its formation can be divided into lake pitch, rock asphalt, seabed pitch etc.Rock asphalt is that oil is through reaching deposition, the variation in 1 years, the bitumen that generates under the comprehensive action of heat, pressure, oxidation, catalyst, bacterium etc.The physical property of rock asphalt levels off to coal.Wherein the Qing Chuan rock asphalt is a kind of of natural rock asphalt.In China the Longmen Mountain Area of the Northern Sichuan Province of land of plenty good reputation is arranged, extensively be distributed with the Qing Chuan rock asphalt, the reserves of tentatively verifying at present are more than 3,000,000 tons, 1,000 ten thousand tons of prospective reservess.The Qing Chuan rock asphalt be take molecular weight up to 10,000 bituminous matter as the chief component composition, its chemical component is carbon (C) 81.7%, hydrogen (H) 7.5%, oxygen (O) 2.3%, nitrogen (N) 1.95%, sulphur (S) 4.4%, aluminium (Al) 1.1%, silicon (Si) 0.18% and other metals 0.87%, wherein the content of carbon (C), hydrogen (H), oxygen (O), nitrogen (N), sulphur (S) is higher.Because the Qing Chuan rock asphalt results from the special rock fracture, suffered pressure is higher than other rock asphalts with temperature condition, so extent of polymerization is very high, molecular weight is very large, and softening temperature is higher.Therefore, the Qing Chuan rock asphalt has many characteristics that are different from other natural rock asphalts.
Have at present and use rock asphalt, for example rock asphalt improves the technology of matrix pitch performance as properties-correcting agent.Chinese patent application CN 102558884A (date of publication: on July 11st, 2012) disclose a kind of processes of rock asphalt modified asphalt and preparation method thereof.Aforementioned modifying asphalt comprises by weight percentage 85%～90% matrix pitch, 10%～15% natural rock asphalt.Although summarizing, this patent application points out that the employed natural rock asphalt of embodiment can be selected from Trinidad and Tobago's lake pitch (in fact, Trinidad and Tobago's lake pitch is lake pitch), Utah, USA natural rock asphalt and/or Chinese Qing Chuan rock asphalt etc., but this application is not put down in writing the embodiment of concrete application Qing Chuan rock asphalt.And in fact, natural rock asphalt comprises that the performance of Utah, USA natural rock asphalt, Chinese Qing Chuan rock asphalt, the honest rock asphalt of cloth is also incomplete same, and therefore, therefore they add matrix pitch as properties-correcting agent ratio also has different with method.Therefore, the ratio of the natural rock asphalt of aforementioned patent applications record and matrix pitch and be not suitable for the Qing Chuan rock asphalt.Add the modifying asphalt that the Qing Chuan rock asphalt obtains by aforementioned ratio, its performance especially performances such as dynamic stability, water stability, anti-water damage ability is unsatisfactory.
Therefore, be necessary to continue to seek natural rock asphalt modifying asphalt that is applicable to the Qing Chuan rock asphalt and preparation method thereof.
Summary of the invention
Main purpose of the present invention is for the undesirable problem of the Qing Chuan rock asphalt that exists in the above-mentioned prior art and the inappropriate Qing Chuan processes of rock asphalt modified asphalt performance that causes of matrix pitch ratio especially dynamic stability performance, and a kind of Qing Chuan processes of rock asphalt modified asphalt is provided.As the second purpose of the present invention, the invention provides the preparation technology of aforementioned Qing Chuan processes of rock asphalt modified asphalt.
In order to realize the foregoing invention purpose, the technical solution used in the present invention is as follows:
The Qing Chuan processes of rock asphalt modified asphalt is grouped into by the one-tenth of following weight percent:
Qing Chuan rock asphalt 16%～20% matrix pitch 80%～84%.
The contriver has obtained the proportioning of Qing Chuan of the present invention rock asphalt and matrix pitch by large quantity research and screening.Screen the Qing Chuan processes of rock asphalt modified asphalt that obtains by the present invention, its performance obviously improves, especially the dynamic stability of modifying asphalt effectively improves, and further, therefore the performance of the asphalt that is made by Qing Chuan of the present invention processes of rock asphalt modified asphalt also is improved largely.
As preferably, aforementioned Qing Chuan processes of rock asphalt modified asphalt is grouped into by the one-tenth of following weight percent:
Qing Chuan rock asphalt 20% matrix pitch 80%.
By aforementioned preferred, it is optimum that the various aspects of performance of the Qing Chuan processes of rock asphalt modified asphalt that the present invention obtains all reaches.
As preferably, aforementioned Qing Chuan processes of rock asphalt modified asphalt, described matrix pitch are selected from any of AH-70 pitch or AH-90 pitch.
As the second purpose of the present invention, the invention provides the preparation technology of aforementioned Qing Chuan processes of rock asphalt modified asphalt.The preparation technology of Qing Chuan processes of rock asphalt modified asphalt comprises the steps:
(1) the formula ratio matrix pitch is heated to 130～150 ℃;
(2) keep the described temperature of step (1), formula ratio Qing Chuan rock asphalt powder is slowly added in the matrix pitch of step (1), stir while adding, until the Qing Chuan rock asphalt dissolves fully and be uniformly dispersed, and get final product.
Qing Chuan of the present invention processes of rock asphalt modified asphalt can make asphalt as follows: (1) is heated to 190～220 ℃ of temperature with graded broken stone; (2) graded broken stone is carried out dry mixing 5～10S; (3) the Qing Chuan processes of rock asphalt modified asphalt is added in the graded broken stone, adds again breeze, stir 40s at 160～190 ℃, and get final product.
Compared with prior art, the invention has the beneficial effects as follows:
(1) obtain the composition and ratio of Qing Chuan rock asphalt and matrix pitch by screening, the dynamic stability Effective Raise of the Qing Chuan rock asphalt modified asphalt that the present invention obtains, under hot conditions, rutting resistance is strong, is fit to very much the large area of Heavy Traffic amount.
(2) the Qing Chuan rock asphalt modified asphalt residual stability that obtains of the present invention is high, and the compound anti-water damage ability that makes obviously strengthens.Mass loss and penetration ratio index are all relatively good in the thin film heating test, prove that resistance of aging is strong.Softening temperature is high.Hot storage stability is high, and the Qing Chuan rock asphalt is difficult for separating out from matrix pitch.
(3) Qing Chuan of the present invention processes of rock asphalt modified asphalt, preparation technology is simple, does not need dedicated modified equipment, namely can be made into after building-site directly adds the Qing Chuan rock asphalt in the matrix pitch tank by recipe ratio, stirs.
(4) processes of rock asphalt modified asphalt modification cost in Qing Chuan of the present invention is low, and price advantage is obvious, and the economical with materials price can reach 900 yuan/tons.
(5) utilize Qing Chuan of the present invention processes of rock asphalt modified asphalt to prepare compound, the adhesive power of Qing Chuan rock asphalt and mineral aggregate is strong, has improved the antistrip performance of pitch.
Embodiment
Below in conjunction with embodiment foregoing invention content of the present invention is described in further detail.
But this should be interpreted as that the scope of the above-mentioned theme of the present invention only limits to following embodiment.Not breaking away from the above-mentioned technological thought situation of the present invention, according to ordinary skill knowledge and customary means, make various replacements and change, all should comprise within the scope of the invention.
Embodiment 1 present embodiment is prescription and the Preparation Example of Qing Chuan processes of rock asphalt modified asphalt
Qing Chuan processes of rock asphalt modified asphalt 1000kg, wherein: Qing Chuan rock asphalt 200kg, AH-90 pitch 800kg.
The preparation method:
(1) with formula ratio AH-90 asphalt heating to 130 ℃;
(2) keep step (1) temperature, formula ratio Qing Chuan rock asphalt powder is slowly added in AH-90 pitch of step (1), stir while adding, until the Qing Chuan rock asphalt dissolves fully and be uniformly dispersed, and get final product.
Embodiment 2 present embodiments are prescription and the Preparation Example of Qing Chuan processes of rock asphalt modified asphalt
Qing Chuan processes of rock asphalt modified asphalt 1000kg, wherein: Qing Chuan rock asphalt 180kg, AH-90 pitch 820kg.
The preparation method:
(1) with formula ratio AH-90 asphalt heating to 150 ℃;
(2) step (1) temperature slowly adds formula ratio Qing Chuan rock asphalt powder in AH-90 pitch of step (1), stirs while adding, until the Qing Chuan rock asphalt dissolves fully and be uniformly dispersed, and get final product.
Embodiment 3 present embodiments are prescription and the Preparation Example of Qing Chuan processes of rock asphalt modified asphalt
Qing Chuan processes of rock asphalt modified asphalt 1000kg, wherein: Qing Chuan rock asphalt 160kg, AH-70 pitch 840kg.
The preparation method:
(1) with formula ratio AH-70 asphalt heating to 150 ℃;
(2) step (1) temperature slowly adds formula ratio Qing Chuan rock asphalt powder in the AH-70 pitch of step (1), stirs while adding, until the Qing Chuan rock asphalt dissolves fully and be uniformly dispersed, and get final product.
By the following method, the Qing Chuan processes of rock asphalt modified asphalt compound 500kg that obtains:
(1) graded broken stone 455kg is heated to 200 ℃ of temperature;
(2) graded broken stone is carried out dry mixing 10s;
(3) Qing Chuan processes of rock asphalt modified asphalt 26.06 is added in the graded broken stone, adds again breeze 18.94kg, stir 40s at 180 ℃, and get final product.
Test example
Test example 1
This test example is about Qing Chuan processes of rock asphalt modified asphalt Marshall stability test and moving stability test.
Test is divided into five groups, and wherein the 1st group is not added any natural rock asphalt, and the weight percent of the 2nd group of Qing Chuan rock asphalt and matrix pitch is 16%:84%; The weight percent of the 3rd group of Qing Chuan rock asphalt and matrix pitch is 20%:80%; The weight percent of the 4th group of Qing Chuan rock asphalt and matrix pitch is 10%:90%; The weight percent of the 5th group of Qing Chuan rock asphalt and matrix pitch is 15%:85%.Marshall stability test the results are shown in Table 1:
The Marshall stability test of table 1. Qing Chuan processes of rock asphalt modified asphalt
Moving stability test test-results sees Table 2:
The dynamic stability test of table 2. Qing Chuan processes of rock asphalt modified asphalt
By table 1, table 2 result as can be known: (1) is by the weight proportion of screening Qing Chuan rock asphalt and matrix pitch, the Qing Chuan processes of rock asphalt modified asphalt that the present invention obtains is uniformly dispersed, stability obviously increases, therefore can significantly improve the performance of compound, reduce because the various damages on the road surface that vehicle-mounted heavy duty and hot conditions cause; (2) and when Qing Chuan rock asphalt and matrix pitch weight ratio proportioning are outside the selected scope of the present invention, Qing Chuan processes of rock asphalt modified asphalt stable not ideal enough can not adapt to the road surface of heavy duty and hot conditions.
Test example 2
This test example is the freeze thawing split test about Qing Chuan processes of rock asphalt modified asphalt compound.In the following test example, the preparation method of compound is:
(1) graded broken stone is heated to 200 ℃ of temperature;
(2) graded broken stone is carried out dry mixing 10s;
(3) the Qing Chuan processes of rock asphalt modified asphalt is added in the graded broken stone, adds again breeze, stir 40s at 180 ℃, and get final product.
The test grouping is with test example 1.The freeze thawing split test the results are shown in Table 3.
Table 3. freeze thawing split test result
By table 3 result as can be known: the Qing Chuan processes of rock asphalt modified asphalt that (1) the present invention obtains has improved the adhesivity of pitch and building stones, and the water stability of compound improves, and the ability of anti-water damage also improves greatly; (2) and when Qing Chuan rock asphalt and matrix pitch weight ratio proportioning were outside the selected scope of the present invention, the water stability of Qing Chuan processes of rock asphalt modified asphalt compound and anti-water damage ability were not ideal enough.
Claims (4)
1. the Qing Chuan processes of rock asphalt modified asphalt is characterized in that, is grouped into by the one-tenth of following weight percent:
Qing Chuan rock asphalt 16%～20% matrix pitch 80%～84%.
2. Qing Chuan according to claim 1 processes of rock asphalt modified asphalt is characterized in that, is grouped into by the one-tenth of following weight percent:
Qing Chuan rock asphalt 20% matrix pitch 80%.
3. Qing Chuan according to claim 1 processes of rock asphalt modified asphalt is characterized in that described matrix pitch is selected from any of AH-70 pitch or AH-90 pitch.
4. according to claim 1 to the preparation technology of 3 each described Qing Chuan processes of rock asphalt modified asphalts, it is characterized in that, comprise the steps:
(1) the formula ratio matrix pitch is heated to 130～150 ℃;
(2) keep the described temperature of step (1), formula ratio Qing Chuan rock asphalt powder is slowly added in the matrix pitch of step (1), stir while adding, until the Qing Chuan rock asphalt dissolves fully and be uniformly dispersed, and get final product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103832250A CN102863805A (en) | 2012-10-11 | 2012-10-11 | Modified Qingchuan rock asphalt and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103832250A CN102863805A (en) | 2012-10-11 | 2012-10-11 | Modified Qingchuan rock asphalt and preparation method thereof |
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| CN102863805A true CN102863805A (en) | 2013-01-09 |
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| CN2012103832250A Pending CN102863805A (en) | 2012-10-11 | 2012-10-11 | Modified Qingchuan rock asphalt and preparation method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103788666A (en) * | 2013-12-16 | 2014-05-14 | 广西科中大交通科技有限公司 | Bituminous pavement anti-rut agent and preparation method thereof |
| CN103819913A (en) * | 2014-02-21 | 2014-05-28 | 淄博京源新材料科技有限公司 | High-performance modified asphalt, and preparation method and preparation apparatus thereof |
| CN104560089A (en) * | 2013-10-22 | 2015-04-29 | 中国石油化工股份有限公司 | Method for producing asphalt with high softening point |
| CN104560086A (en) * | 2013-10-22 | 2015-04-29 | 中国石油化工股份有限公司 | Preparation method for asphalt with high softening point |
| CN115197581A (en) * | 2022-05-24 | 2022-10-18 | 中交二公局东萌工程有限公司 | Quick-setting asphalt cold-patch material and preparation method thereof |
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| KR20070041659A (en) * | 2005-10-16 | 2007-04-19 | 오은영 | Adhesive composition manufactured mainly from various pitches extracted from fossil fuels |
| CN101445660A (en) * | 2008-11-05 | 2009-06-03 | 河北省通力沥青技术开发有限公司 | Modified asphalt applying rock asphalt, asphalt mixture and preparation method thereof |
| CN102558884A (en) * | 2011-12-28 | 2012-07-11 | 赖炳聪 | Rock asphalt modified asphalt and preparation method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104560089A (en) * | 2013-10-22 | 2015-04-29 | 中国石油化工股份有限公司 | Method for producing asphalt with high softening point |
| CN104560086A (en) * | 2013-10-22 | 2015-04-29 | 中国石油化工股份有限公司 | Preparation method for asphalt with high softening point |
| CN103788666A (en) * | 2013-12-16 | 2014-05-14 | 广西科中大交通科技有限公司 | Bituminous pavement anti-rut agent and preparation method thereof |
| CN103788666B (en) * | 2013-12-16 | 2016-01-20 | 广西科中大交通科技有限公司 | Anti-rut agent for asphalt pavements and preparation method thereof |
| CN103819913A (en) * | 2014-02-21 | 2014-05-28 | 淄博京源新材料科技有限公司 | High-performance modified asphalt, and preparation method and preparation apparatus thereof |
| CN103819913B (en) * | 2014-02-21 | 2016-05-04 | 淄博京源新材料科技有限公司 | High performance modified bitumen and preparation method thereof and device |
| CN115197581A (en) * | 2022-05-24 | 2022-10-18 | 中交二公局东萌工程有限公司 | Quick-setting asphalt cold-patch material and preparation method thereof |
| CN115197581B (en) * | 2022-05-24 | 2023-09-05 | 中交二公局东萌工程有限公司 | Quick-setting asphalt cold-patch material and preparation method thereof |
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Application publication date: 20130109 |