Modified asphalt for road and its preparation method
A technology of modified asphalt and road asphalt, which is applied in building components, building insulation materials, buildings, etc., and can solve the problems of modified asphalt viscosity increase at 135°C, insufficient, and weakened stability
Inactive Publication Date: 2004-05-05
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
However, experiments have shown that for every 1% increase in SBS, the softening point increases by about 2-3°C, and the effect is not obvious. On the contrary, it increases the viscosity of the modified asphalt at 135°C, and also makes the oil that promotes SBS dispersion in the modified asphalt system Parts tend to be insufficient, and the stability of the system is weakened
Method used
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Embodiment 1
[0017] Comparative example 1
Embodiment 2
[0019] Comparative example 2
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Abstract
Description
1. Technical field [0001] The invention relates to modified asphalt and a preparation method thereof, in particular to a modified asphalt for roads with a high softening point and a preparation method thereof. 2. Background technology [0002] Styrene-butadiene-styrene block copolymer (SBS) modified asphalt, as a bonding material for road construction, is mainly used in high-grade road construction. Compared with ordinary road asphalt, its sensitivity to temperature has been significantly improved, mainly in the softening point index has been significantly improved. In the technical specification for high-grade road petroleum asphalt, the softening point is specified as a maximum of 55°C, while in the specification for modified asphalt, the softening point can be higher than 60°C. The pavement can maintain a high viscosity under the ambient temperature of the pavement, and it is not easy to flow, which effectively maintains the stability of the structure of the pavement sur...
Claims
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IPC IPC(8): C08L95/00
Inventor 宁爱民徐青柏吴佩尊陈杰李志军
Owner CHINA PETROLEUM & CHEM CORP