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Modified bitumen and bituminous mixture
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A technology of asphalt mixture and modified asphalt, which is applied in the direction of building insulation materials, building components, buildings, etc., can solve the problems of insufficient asphalt content and high price, achieve reduced penetration, improve high temperature stability, and have a wide range of applications Effect
Active Publication Date: 2012-04-25
SHANGHAI ROAD & BRIDGE (GRP) CO LTD +1
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Problems solved by technology
At present, Trinidad Lake asphalt (TLA) and North American rock asphalt (such as UINTAHITE) are widely used in the world, but their prices are relatively expensive (about 6000-7000 yuan / ton)
In recent years, natural asphalt rocks have also been found on the seabed of Buton Island, Indonesia, in the South Pacific, referred to as BMA (Butonite MasticAsphalt) seabed asphalt (Butonite seabed asphalt), the price is relatively low (about 2600 yuan / ton), but its asphalt content It is not as good as the above-mentioned lake asphalt and rock asphalt (TLA 50-55%, UINTAHITE 90%, BMA 25-30%). Whether it can improve the performance of asphalt mixture, especially whether it can be applied to domestic heavy-duty roads or pavement materials for special occasions, remains to be seen. unknown
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Embodiment 1～13
[0016] Embodiment 1~13 modified asphalt of the present invention
[0017] formula:
[0018] Example BMA Base bitumen type SBR SBS 1 10％ South Korea 70#, 90% 2 20％ South Korea 70#, 80% 3 25％ South Korea 70#, 75% 4 30％ South Korea 70#, 70% 5 40％ Korea 70#, 60% 6 20％ Taizhou 90#, 80% 7 20％ South Korea 70#, 76% 4％ 8 25％ South Korea 70#, 71% 4％ 9 20％ Taizhou 70#, 80% 10 20％ Taizhou 70#, 73% 7％ 11 20％ Taizhou 70#, 66% 14％ 12 20％ Shell 70#, 76% 4％ 13 25％ Shell 70#, 71% 4％
[0019] Above-mentioned embodiments 1~6, 9~11 only need to simply stir each component in 150~170 ℃ of temperature range and can prepare; -2004) stipulates to prepare the finished SBS modified asphalt, and then add BMA to the SBS modified asphalt and simply stir at a temperature range of 150-170°C to prepare it.
[0020] The above percentages are the weight pe...
Embodiment 14～15
[0021] Embodiment 14-15 Modified asphalt mixture of the present invention
[0022] According to the AC-13I gradation, 5.7% of the modified asphalt of Example 2 or Example 3 and 94.3% of the pellets (90.3% aggregate+4% mineral powder) are automatically mixed by an asphalt mixer: first the modified Asphalt and aggregates are heated separately (modified asphalt is heated to 160-170°C, aggregate is heated to 190-220°C), and then according to the proportion of each component, aggregate is added first, then asphalt and mineral powder, and mixed for 60 seconds. It is also possible to heat the aggregate to 160-170°C first, add BMA and stir for 10-20 seconds, then add base petroleum asphalt in proportion, and the wet mixing time is not less than 40 seconds.
Embodiment 16～17
[0023] Embodiments 16-17 Modified asphalt mixture of the present invention
[0024] According to AK-13A, 5.3% of the modified asphalt of Example 12 or Example 13 and 94.7% of pellets (90.7% aggregate+4% mineral powder) were mixed, and the preparation method was the same as that of Examples 14-15.
[0025] The above percentages are all percentages by weight.
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Abstract
The invention discloses modified asphalt which comprises base asphalt and modifier, wherein, the modifier comprises Butonite mastic asphalt (BMA) which accounts for 10 to 40 percent of the weight of the base asphalt. The invention also provides an asphalt mixture containing the modified asphalt. The penetration degree of the modified asphalt is reduced and the softening point is risen, which indicate that the high-temperature stability of the asphalt is improved and the temperature sensitivity is reduced; and particularly the mixed use of modifiers such as SBR, SBS and so on, has modified synergic effect. The asphalt mixture has broad applicable range, and better high-temperature stability, anti-rutting performance, anti-cracking performance and anti-water-damage ability.
Description
technical field [0001] The invention relates to the field of asphalt materials, in particular to a modified asphalt and an asphalt mixture containing the same. Background technique [0002] With the construction and development of expressways in my country, the improvement of road grades, the surge in traffic volume and the acceleration of driving speeds have put forward higher requirements for the quality of the road surface. Basic requirements of the road. At present, the asphalt used in the asphalt mixture used in high-grade roads is mostly modified asphalt mixed with modifiers and other fillers in ordinary asphalt. Modifiers commonly used in domestic and foreign factories are: rubber SBR (styrene-butadiene rubber); resin EVA, PE; thermoplasticelastomer SBS (styrene-butadiene-styrenethermoplasticelastomer or styrene-butadiene-styrene thermoplasticelastomer) ) and other PS and natural asphalt, etc. Among them, natural asphalt and matrix asphalt have very good compati...
Claims
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Application Information
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