CN103849153B - The preparation method of high-viscosity high-elasticity asphalt and high-viscosity high-elasticity asphalt - Google Patents
The preparation method of high-viscosity high-elasticity asphalt and high-viscosity high-elasticity asphalt Download PDFInfo
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Abstract
The present invention discloses the preparation method of a kind of high-viscosity high-elasticity asphalt and a kind of high-viscosity high-elasticity asphalt. Constructed in accordance go out high-viscosity high-elasticity asphalt, there is high viscosity, snappiness, also there is excellent construction workability, namely while meeting the requirement of Long span bridge resistance to deformation, antifatigue, long service life, also solve the problem of the general construction workability difference of high-viscosity high-elasticity asphalt. The item key of the present invention is that 60 DEG C of viscosity are greater than 80000Pa.s, and 135 DEG C of viscosity are less than 3Pa.s, and softening temperature can reach more than 85 DEG C simultaneously, and also more current domestic the most frequently used similar high-elastic high-viscosity asphalt cost is low more than 20% for its cost.
Description
Technical field
The invention belongs to road engineering design field, particularly relate to the preparation method of a kind of high-viscosity high-elasticity asphalt and a kind of high-viscosity high-elasticity asphalt. The high-viscosity high-elasticity asphalt that the present invention produces 60 DEG C of viscosity are greater than 80000Pa.s, and 135 DEG C of viscosity are less than 3Pa.s, and softening temperature can reach more than 85 DEG C simultaneously.
Background technology
In the face of current bridge deck pavement easily damages, again lays or maintenance difficulty height, easily cause the situations such as traffic jam, modified asphalt and bituminous epoxy to be difficult to satisfied current bridge pave-load layer demand. High-viscosity high-elasticity asphalt has significant effect and application benefit improving in the pavement performance of asphalt, in the paving process of many successful paving bridge floor layers, high-viscosity high-elasticity asphalt is widely used, but the high-viscosity high-elasticity asphalt that traditional technology is produced due to its high temperature viscosity index too high, it is unfavorable for that construction is mixed conjunction, rolled, and add separately the high-viscosity high-elasticity asphalt that rubber powder is produced, its 135 DEG C of viscosity indexes are much larger than 3Pa.s, and construction workability can not get effective solution; Adding separately the high-viscosity high-elasticity asphalt that SBS modifier is produced, 60 DEG C of viscosity indexes are more difficult is greater than 40000Pa.s for it, it is difficult to reach high sticky effect. Therefore it is great to develop a kind of intensity height, rutting resistance novel asphalt material sense strong, high/low temperature good stability.
Summary of the invention
Technical problem to be solved by this invention is to provide one and can prepare and can meet this performance of high-viscosity high-elasticity, turn improves the method for the high-viscosity high-elasticity asphalt of construction workability.
For the problem of matrix pitch and additive compatibility difference, the character of various kinds of substrates pitch has been done big quantitative analysis and debugging by contriver, finally determines to be achieved through the following technical solutions the present invention:
A preparation method for high-viscosity high-elasticity asphalt, comprises following steps:
1) starting material are chosen: choosing each starting material with its weight percentage is: the compatilizer of 6��7%, the rubber grain of 4��5%, the SBS modifier of 5��7%, the viscosity modifier of 2��4%, the stablizer of 0.2��0.4%, and other is matrix pitch;
2) matrix pitch measured in proportion is heated to 185��190 DEG C;
3) adding in above-mentioned matrix pitch in proportion by compatilizer and rubber grain, control temperature, at 185��190 DEG C, stirs with circulation shear said mixture to rubber grain fine uniform;
4) SBS modifier is added in proportion said mixture, control temperature 185��190 DEG C, stir with circulation shear to without obvious particle;
5) viscosity modifier is added in proportion said mixture, control temperature 185��190 DEG C, stir with circulation shear to without obvious particle;
6) stablizer is slowly added in proportion said mixture, control temperature 185��190 DEG C, stir and circulation shear 15��20 minutes, then adopt agitator to stir 1��2h, obtain high-viscosity high-elasticity asphalt. Chemical reaction can be there is in stablizer after adding, make the performance of product more stable, if but disposable add or add that temperature is too low can affect reaction effect, therefore for reaching satisfactory stability effect, stablizer can be divided into four equal portions, slowly add one part every 3min. And determining that stirring 1��2h is even more ideal because reaction can be made to grow under the time long like this, effect is more obvious.
As preferably, above-mentioned steps 1) in choose compatilizer weight percentage be 7%.
As preferably, above-mentioned steps 1) in choose rubber grain weight percentage be 4%.
As preferably, above-mentioned steps 1) in choose SBS modifier weight percentage be 6%.
As preferably, above-mentioned steps 1) in choose viscosity modifier weight percentage be 3%.
As preferably, above-mentioned steps 1) in choose stablizer weight percentage be 0.3%.
As above in method, the order of addition of each raw material considers based on the relation interacted between raw material, is specially:
First we select to add rubber grain in matrix pitch to improve its viscosity index, its viscosity is allowed to meet the sticky requirement of pitch height, adding compatilizer simultaneously and improve consistency, the low-temperature cracking-resistance of rubber grain and matrix pitch, also consistency needed for follow-up interpolation SBS modifier is prepared; Then add SBS modifier, improve the indexs such as the softening temperature of pitch, low-temperature ductility, allow it improve rutting resistance; On the basis that this has begun to take shape high-elastic high-viscosity asphalt, the object regulating asphalt mixture viscosity 135 DEG C, 60 DEG C balances between the two is reached with getting twice the result with half the effort again by adding viscosity modifier, the viscosity thus reaching 135 DEG C is lowered and the viscosity of 60 DEG C is enhanced object, provides necessary condition for final finished product can meet the requirement that high-viscosity high-elasticity turn improves construction workability; Finally add stablizer again to regulate the stable storing performance of this product, it is convenient to this product standing storage so that segregation does not occur in the auxiliary agent of interpolation.
As above each temperature in method is determined after being all through screening, the too low formation being unfavorable for this product of temperature, and related auxiliaries can not dissolve completely, and temperature is too high, and to accelerate these product performance aging, therefore selects this temperature range; Time is also determined according to test situation, and easy grinding is not thorough for time too short interpolation auxiliary agent, and overlong time can destroy its character because of high speed shear.
It is a further object of the present invention to provide a kind of high-viscosity high-elasticity asphalt, this high-viscosity high-elasticity asphalt 60 DEG C of viscosity are greater than 80000Pa.s, and 135 DEG C of viscosity are less than 3Pa.s, and its technical scheme is:
A kind of high-viscosity high-elasticity asphalt, its composition and weight percentage be: the compatilizer of 6��7%, the rubber grain of 4��5%, the SBS modifier of 5��7%, the viscosity modifier of 2��4%, the stablizer of 0.2��0.4%, other is matrix pitch.
As preferably, above-mentioned high-viscosity high-elasticity asphalt, wherein the weight percentage of compatilizer is 7%.
As preferably, above-mentioned high-viscosity high-elasticity asphalt, wherein the weight percentage of rubber grain is 4%.
As preferably, above-mentioned high-viscosity high-elasticity asphalt, wherein the weight percentage of SBS modifier is 6%.
As preferably, above-mentioned high-viscosity high-elasticity asphalt, wherein the weight percentage of viscosity modifier is 3%.
As preferably, above-mentioned high-viscosity high-elasticity asphalt, wherein the weight percentage of stablizer is 0.3%.
As above the final employing of these raw materials and their weight fraction are chosen is all that performance requriements according to high-elastic high-viscosity asphalt is determined by test in a large number, it is all generate the finished product characteristic institute essential condition, the cooperation of these ratios makes the high-elastic high-viscosity asphalt of this invention while ensure that snappiness, high viscosity and excellent construction workability, manufacturing cost is minimum, if adopting other formula or ratio, to cause product cost height, the mixture performance finally made may be poor and undesirable. Especially the interpolation of viscosity modifier ensure that the construction workability energy of this product, the interpolation of compatilizer improves the compatibleness of SBS modifier, rubber powder and matrix pitch, solve the problems such as auxiliary agent segregation, the high-elastic high-viscosity asphalt finally obtained is made to meet technical indicator, reach the service requirements of client, control cost to a certain extent, it is to increase the competitiveness of product in market simultaneously.
Compared with prior art, the invention has the beneficial effects as follows: the present invention adopts rubber powder, the technique that SBS modifier compound is added, have studied the most suitable ratio, add compatilizer simultaneously, viscosity modifier, the auxiliary agents such as stablizer improve the stability in storage of product and high-elastic performance, and overcome the problems such as auxiliary agent segregation, sum up the most suitable technique, thus can go out low temperature viscosity height by batch micro operations, high temperature viscosity is low, intensity height, easily mix conjunction, recovery of elasticity is good and the more current domestic low high-viscosity high-elasticity asphalt product more than 20% of the most frequently used similar high-elastic high-viscosity asphalt cost of cost, the use of this product is to raising bridge deck pavement shock resistance, wear resisting property, anti-fatigue performance, resistance to cleavage and water resistance have important guarantee effect. especially improve 60 DEG C of viscosity, reduce 135 DEG C of viscosity, both met product Rut resistance, antifatigue, this performance of durable high-viscosity high-elasticity, and turn improved construction workability, successfully solve high-viscosity high-elasticity asphalt construction workability this problem of difference. and this product softening temperature index is higher, more than 85 DEG C can be reached, there is good high-temperature stability, elastic recovery capability is strong simultaneously, there is good low-temperature cracking-resistance, it is high quality, it is easy to produce, be easy to the deck paving novel material of construction, for deck paving is provided convenience, more easily realize quality control.
Accompanying drawing explanation
For ease of illustrating, the present invention is described in detail by following specific embodiment and accompanying drawing.
Fig. 1 is the process flow sheet of the preparation method of the present invention.
Embodiment
Embodiment 1
According to the technical process of such as Fig. 1, prepare high-viscosity high-elasticity asphalt:
1) starting material are chosen: choosing each starting material with its weight percentage is: the compatilizer of 6%, the rubber grain of 4%, the SBS of 5%, the viscosity modifier of 2%, the stablizer of 0.4%, and other is matrix pitch;
2) matrix pitch measured in proportion is heated to 185��190 DEG C;
3) adding in above-mentioned matrix pitch in proportion by compatilizer and rubber grain, control temperature, at 185��190 DEG C, stirs with circulation shear said mixture to rubber grain fine uniform;
4) SBS modifier is added in proportion said mixture, control temperature 185��190 DEG C, stir with circulation shear to without obvious particle;
5) viscosity modifier is added in proportion said mixture, control temperature 185��190 DEG C, stir with circulation shear to without obvious particle;
6) stablizer of proper ratio is divided into four equal portions, slowly adds one part in said mixture every 3min, control temperature 185��190 DEG C, stir and circulation shear 15��25 minutes, then adopt agitator to stir 1��2 hour, obtain high-viscosity high-elasticity asphalt.
Embodiment 2
Keeping the preparation method of embodiment 1 constant, the starting material wherein choosing high-viscosity high-elasticity asphalt with its weight percentage are: the compatilizer of 6%, the rubber grain of 5%, the SBS modifier of 7%, the viscosity modifier of 3%, the stablizer of 0.3%, other is matrix pitch.
Embodiment 3
Keeping the preparation method of embodiment 1 constant, the starting material wherein choosing high-viscosity high-elasticity asphalt with its weight percentage are: the compatilizer of 7%, the rubber grain of 4%, the SBS modifier of 6%, the viscosity modifier of 3%, the stablizer of 0.3%, other is matrix pitch.
Embodiment 4
Keeping the preparation method of embodiment 1 constant, the starting material wherein choosing high-viscosity high-elasticity asphalt with its weight percentage are: the compatilizer of 7%, the rubber grain of 5%, the SBS modifier of 5%, the viscosity modifier of 4%, the stablizer of 0.2%, other is matrix pitch.
Quality product detects
The current national correlation department of high-viscosity high-elasticity asphalt technical requirements does not put into effect clear and definite technical specifications, so we temporarily come with reference to contrast according to SBSI��C level technical target of the product, bridge floor special asphalt is exactly high-viscosity high-elasticity asphalt in fact in addition, because of needs difference so title is different:
Comparison industry standard " standard specification for construction and acceptance of highway asphalt pavement " (JTGF40��2004) modifying asphalt SBS class I��C, to as above Product checking result is as follows:
Detecting according to bridge floor special asphalt technical requirements, Product checking data are as follows:
From above data, the product of the present invention meets " standard specification for construction and acceptance of highway asphalt pavement " (JTGF40��2004) modifying asphalt SBS class I��C industry standard completely, also bridge floor special asphalt technical requirements is met completely, especially under the formula of embodiment 3, its 60 DEG C of viscosity (vacuum decompression kapillary) are 102367Pa.s, overproof 40000Pa.s far away so that it is strong with building stones adhesivity; And 135 DEG C of kinetic viscosities are 2.4Pa.s, it is less than the 3.0Pa.s of standard, illustrates that conjunction excellent performance is mixed in construction; And package stability is 1.2 DEG C, lower than the 2.5 of standard DEG C so that the stable storing performance of product is higher.
Compare with domestic and international similar technique
1. product and similar products at home and abroad comparative analysis technical indicator, for existing conventional Japanese TPS high-viscosity high-elasticity asphalt, comparing result is as follows:
By above table it may be seen that this product contrasts external like product (Japan's TPS high-viscosity high-elasticity asphalt), 60 DEG C of viscosity height, strong with building stones adhesivity, 135 DEG C of viscosity are low, and it is excellent that conjunction performance is mixed in construction, the stable storing performance of product is higher, and other index is more or less the same.
2. product and similar products at home and abroad cost compare
At present, the maximum high-viscosity high-elasticity asphalt of domestic use is mainly based on Japan's TPS high-viscosity high-elasticity asphalt, and TPS domestic price is more than 50000 yuan/ton, and volume to be reached about 15%, and every ton of TPS high-viscosity asphalt price is more than 10000 yuan.
The high-viscosity high-elasticity asphalt product that the present invention produces, adding auxiliary agent price far below TPS properties-correcting agent, integral production cost is amounted to and is no more than 8000 yuan/ton, compares cheap about 2000 yuan/ton of TPS high-viscosity high-elasticity asphalt price, in price almost cheap more than 20%, there is very strong competitive edge.
The above, be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, and any change of expecting without creative work or replacement, all should be encompassed within protection scope of the present invention.
Claims (3)
1. the preparation method of a high-viscosity high-elasticity asphalt, it is characterised in that, comprise following steps:
1) starting material are chosen: choosing each starting material with its weight percentage is: the compatilizer of 6��7%, the rubber grain of 4��5%, the SBS modifier of 5��7%, the viscosity modifier of 2��4%, the stablizer of 0.2��0.4%, and other is matrix pitch;
2) matrix pitch measured in proportion is heated to 185��190 DEG C;
3) adding in above-mentioned matrix pitch in proportion by compatilizer and rubber grain, control temperature, at 185��190 DEG C, stirs with circulation shear said mixture to rubber grain fine uniform;
4) SBS modifier is added in proportion said mixture, control temperature 185��190 DEG C, stir with circulation shear to without obvious particle;
5) viscosity modifier is added in proportion said mixture, control temperature 185��190 DEG C, stir with circulation shear to without obvious particle;
6) stablizer is prepared in proportion, and it is divided into four equal portions, slowly add one part to said mixture every 3min, control temperature 185��190 DEG C, stir and circulation shear 15��20 minutes, then adopt agitator to stir 1��2h, obtain high-viscosity high-elasticity asphalt.
2. the preparation method of high-viscosity high-elasticity asphalt according to claim 1, it is characterised in that, described step 1) in choose compatilizer weight percentage be 7%.
3. the preparation method of high-viscosity high-elasticity asphalt according to claim 1, it is characterised in that, described step 1) in choose rubber grain weight percentage be 4%.
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| CN106243746A (en) * | 2016-07-29 | 2016-12-21 | 中海沥青（泰州）有限责任公司 | A kind of ultra-thin wearing layer modified pitch and preparation method thereof |
| CN106221252A (en) * | 2016-08-25 | 2016-12-14 | 南京同力建设集团股份有限公司 | A kind of high viscous composite modified asphalt and preparation method thereof |
| CN106633961A (en) * | 2016-12-19 | 2017-05-10 | 长安大学 | High-viscosity modified asphalt material and preparation method thereof |
| CN106633966A (en) * | 2017-01-16 | 2017-05-10 | 中国海洋石油总公司 | Modified asphalt for ultra-thin wearing course and preparation method of modified asphalt |
| CN108329705B (en) * | 2018-02-09 | 2020-10-23 | 山东星火科学技术研究院 | High-viscosity high-elasticity asphalt and preparation method thereof |
| CN109880384A (en) * | 2019-01-22 | 2019-06-14 | 长安大学 | A kind of composite modified high-viscosity asphalt of environment-friendly type and preparation method |
| CN110564169A (en) * | 2019-09-18 | 2019-12-13 | 杨烨 | Preparation method of high-viscosity high-elasticity asphalt |
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