Polymer modified compsn. of road bitumen and its prepn. method
A technology of road asphalt and polymer, which is applied in the direction of building structure, building components, building insulation materials, etc., can solve the problems of cumbersome process methods and steps, high equipment requirements, and limited processing capacity, and achieve simple production equipment and low investment , the effect of small temperature sensitivity
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[0019] The preparation of modified asphalt can include the following two specific processes:
[0020] A. According to the proportion of the polymer in the modified asphalt, add 2% to 18% of the mother liquor to the hot asphalt at 150°C to 210°C, preferably at 170°C to 190°C, and mix (10 to 180°C) under ordinary stirring ) min, preferably (20-100) min, while stirring, add the composite additive in 2-5 times, wherein the first time is 50% of the total amount of the additive, and the amount added each time is an equal portion of the remaining amount Adding, each addition takes no more than 60 minutes, preferably (5-40) minutes, and the reaction time after each addition is (10-120) minutes, preferably (20-80) minutes after the first addition , After each addition, react for 20-60 minutes. After adding the composite additive for the first time, the reaction temperature can be increased to 170°C-230°C, preferably kept at 175°C-220°C until the reaction is completed.
[0021] B. Fir...
Embodiment 1
[0024] At 175°C, add SBS to a lubricating oil solvent-refined extracted oil, the saturated content in the extracted oil is 36.62% (m), the aromatic content is 42.00% (m), and the colloid is 21.33% (m ), 0.05% (m) of asphaltene, 2.51% (m) of wax content, 50% (m) of SBS and 50% (m) of extracted oil, mixed under ordinary stirring for 3 hours until melted to prepare a mother liquor. Take the mother liquor, which accounts for 10% of the total amount of modified asphalt, and add it to hot asphalt at 175°C. The asphalt has a penetration of 97 1 / 10mm and a softening point of 45.7°C, accounting for 88.8% of the total amount. Stir for 50 minutes. Then add 0.5% composite additive (containing 35% dimorpholine disulfide, 50% lead oxide, and 15% carbon black) with 15min, raise the temperature to 185°C, react for 50min, and finally use the remaining 0.5% composite additive for 5min Add, continue to react after 60min, and test its properties. (The results are shown in Table 1).
Embodiment 2
[0026] At 180°C, add SBS to the vacuum distillate oil of naphthenic crude oil in Liaohe Oilfield. The boiling point range of the distillate oil is 430°C-500°C. Prepared as a stock solution. Take the mother liquor, which accounts for 12% of the total amount of modified asphalt, and add it to the hot asphalt at 180°C. The penetration of the asphalt is 60 1 / 10mm, and the softening point is 49.7°C, accounting for 86.5% (m) of the total amount After stirring for 60 minutes, add half of the composite additive (30% sulfur, 50% zinc oxide, 20% basic calcium carbonate) in 10 minutes, raise the temperature to 215°C, and react for 60 minutes. After this, divide the remaining additives into two equal parts. Add it to the above mixture for 5 minutes each time, and react for 50 minutes until the properties of the modified asphalt are tested. (The results are shown in Table 1).
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