Summary of the invention
One of purpose of the present invention is exactly to propose a kind of hgh-performance emulsified modified asphalt that overcomes above-mentioned shortcoming;
Another object of the present invention is to propose the preparation method of above-mentioned hgh-performance emulsified modified asphalt;
A further object of the invention is to propose the purposes of above-mentioned hgh-performance emulsified modified asphalt.
Hgh-performance emulsified modified asphalt of the present invention comprises matrix pitch, emulsifying agent and properties-correcting agent Sasobit, and wherein emulsifying agent and the properties-correcting agent add-on in matrix pitch with the weight percent meter of matrix pitch, is respectively 0.1~5% and 1~10%.
Said properties-correcting agent Sasobit is that South Africa Sha Suo company (Sasol Wax (South Africa) is Ltd (Pty)) produces among the present invention, and its content accounts for 1~10% of matrix pitch weight, is preferably 3~5%.
Said emulsifying agent is INDULIN DF62, the INDULINDF42 etc. that U.S. MeadWestvaco company produces among the present invention, is preferably INDULIN DF42, and its content accounts for 0.1~5% of matrix pitch weight, is preferably 0.2~0.3%.
The preparation method of said hgh-performance emulsified modified asphalt is as follows among the present invention:
A, preparation Sasobit modifying asphalt: matrix pitch is heated to heat melts state, add the properties-correcting agent Sasobit of above-mentioned content then, Sasobit is dispersed in the pitch that heat melts;
B, preparation soap lye: the emulsifying agent of above-mentioned content is added to the water, is heated to 45~90 ℃, wherein the content of water is 25~50% of soap lye and modifying asphalt gross weight;
C, above-mentioned modifying asphalt for preparing and soap lye are passed through emulsifying device.
Said heat is melted state generally at 110 ℃~155 ℃ in the step 1, when passing through the emulsifying device of step 3, and the modifying asphalt temperature T of step 1
1Temperature T with step 2 soap lye
2Should satisfy: T
1+ T
2≤ 200 ℃.
Sasobit modifying asphalt described in the step 3 and soap lye are with weight percent 50%~75%: 50%~25% by emulsifying device, and said emulsifying device refers to colloidal mill, homogenizer etc.
The prepared hgh-performance emulsified modified asphalt of the present invention is used as sticking layer oil or screening seal coat.
Beneficial effect of the present invention: hgh-performance emulsified modified asphalt excellent road performance provided by the invention, every technical indicator all obviously is better than common emulsified bitumen, solved that sticking layer oil bond effect commonly used is bad, the technical problem of the easy bellding of screening seal coat and intensity low (especially hot strength is low), can obviously improve interlaminar bonding power during as sticking layer oil, can obviously improve the ability of seal intensity and resistance to deformation thereof when being used for screening seal coat, have good application prospects.This emulsified modified asphalt is very easily prepared and is produced, and its emulsifying process is the same with common matrix pitch, and emulsifying effectiveness is fabulous.
Embodiment
Further specify the present invention below in conjunction with the modified emulsifying asphalt production example, rather than limit the scope of the invention.
Embodiment 1
Shell70# pitch is heated to 110~155 ℃, makes it to be heat and melt state, add then and count 5% Sasobit properties-correcting agent with the weight of matrix pitch, stirred and make it evenly mixed.
The Xiang Shuizhong adding is counted 0.3% emulsifying agent INDULIN DF42 with the weight of matrix pitch, and adds hydrochloric acid adjusting emulsifier solution acid number, makes about PH=2, stirs, and is warming up to 45~90 ℃.
The Sasobit modifying asphalt of above-mentioned preparation and emulsifier aqueous solution (soap lye) are got final product by colloidal mill with weight percent 60%: 40%.Its performance sees Table 1.
Embodiment 2
Shell70# pitch is heated to 110~155 ℃, makes it to be heat and melt state, add then and count 3% Sasobit properties-correcting agent with the weight of matrix pitch, stirred and make it evenly mixed.
The Xiang Shuizhong adding is counted 0.2% emulsifying agent INDULIN DF42 with the weight of matrix pitch, and adds hydrochloric acid adjusting emulsifier solution acid number, makes about PH=2, stirs, and is warming up to 45~90 ℃.
The Sasobit modifying asphalt of above-mentioned preparation and emulsifier aqueous solution (soap lye) are got final product by colloidal mill with weight percent 60%: 40%.Its performance sees Table 1.
Embodiment 3
Shell70# pitch is heated to 110~155 ℃, makes it to be heat and melt state, add then and count 10% Sasobit properties-correcting agent with the weight of matrix pitch, stirred and make it evenly mixed.
The Xiang Shuizhong adding is counted 5% emulsifying agent INDULIN DF42 with the quality of matrix pitch, and adds hydrochloric acid adjusting emulsifier solution acid number, makes about PH=2, stirs, and is warming up to 45~90 ℃.
The Sasobit modifying asphalt of above-mentioned preparation and emulsifier aqueous solution (soap lye) are got final product by colloidal mill with mass percent 75%: 25%.Its performance sees Table 1.
Embodiment 4
Shell70# pitch is heated to 110~155 ℃, makes it to be heat and melt state, add then and count 1% Sasobit properties-correcting agent with the quality of matrix pitch, stirred and make it evenly mixed.
The Xiang Shuizhong adding is counted 0.1% emulsifying agent INDULIN DF42 with the quality of matrix pitch, and adds hydrochloric acid adjusting emulsifier solution acid number, makes about PH=2, stirs, and is warming up to 45~90 ℃.
The Sasobit modifying asphalt of above-mentioned preparation and emulsifier aqueous solution (soap lye) are got final product by colloidal mill with mass percent 50%: 50%.Its performance sees Table 1.
Comparative Examples 1
Shell70# pitch is heated to 110~155 ℃, makes it to be heat and melt state.
The Xiang Shuizhong adding is counted 0.2% emulsifying agent INDULIN DF42 with the quality of matrix pitch, and adds hydrochloric acid adjusting emulsifier solution acid number, makes about PH=2, stirs, and is warming up to 45~90 ℃.
Above-mentioned pitch and emulsifier aqueous solution (soap lye) are got final product by colloidal mill with mass percent 60%: 40%.Its performance sees Table 1.
Table 1
Project | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Comparative Examples 1 |
Sasobit, % (accounting for the matrix pitch quality) | 5.0 | 3.0 | 10 | 1 | 0 |
The evaporation residue softening temperature, ℃ | 89 | 69 | 95 | 51 | 49 |
Evaporation residue BBR index test temperature :-12 ℃ | S,Mpa | 195 | 176 | 287 | 152 | 146 |
m | 0.334 | 0.374 | 0.301 | 0.401 | 0.426 |
Evaporation residue DSR index G*/sin δ, Pa | 64℃ | 4721.8 | 3151.8 | 5396.5 | 2281.2 | 2163.5 |
70℃ | 2447.6 | 1639.04 | 2795.8 | 1131.6 | 1078.6 |
The evaporation residue viscosities il, pa.s | 64℃ | 472.1 | 315.1 | 539.7 | 288.1 | 216.3 |
52℃ | 2159.3 | 1587.4 | 2857.8 | 1135.3 | 820 |
Adhesivity wraps area (%) | >90 | >85 | >95 | >80 | 80 |
Testing method: 1, evaporation residue softening temperature, ℃: ASTM D36, Chinese T 0606-2000
2, evaporation residue BBR index S, Mpa, m:AASHTO:TP1-98
3, evaporation residue DSR index G*/sin δ, Pa:AASHTO TP5-93
4, evaporation residue viscosities il, pa.s:AASHTO TP5-93
5, adhesivity wraps area (%): T0654-1993
As can be seen from Table 1:
This emulsified modified asphalt evaporation residue is compared with corresponding common emulsified asphalt evaporation residue (Comparative Examples 1), can increase softening temperature and reach more than 40 ℃; By DSR and BBR index as can be seen, embodiment 1, embodiment 2, embodiment 3 and embodiment 4 have improved high-temperature behavior and its low-temperature performance is good, but the comprehensive better effects if of improving of embodiment 1 and 2 pairs of high and low temperature performances of embodiment.
The evaporation residue viscosities il of embodiment 1, embodiment 2, embodiment 3 and embodiment 4 also has the high-temperature denatured ability of resisting preferably apparently higher than Comparative Examples 1 even this emulsified modified asphalt is described under comparatively high temps.
The modified emulsifying asphalt of embodiment 1, embodiment 2, embodiment 3 and embodiment 4 and the adhesivity of mineral aggregate obviously are better than Comparative Examples 1, illustrate that this emulsified modified asphalt has good adhesive force.