Preparation of active nano calcium carbonate composite modified asphalt material
A technology of composite modified asphalt and nano-calcium carbonate, which is applied in building insulation materials, building components, buildings, etc., can solve the problems of high cost of modified asphalt and expensive elastomers, and improve high temperature performance and dynamic stability , Reduce production cost, good compatibility effect
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Embodiment 1
[0011] Heat 400g of Tepco 70# asphalt at 140°C until it flows completely, then add 16g of SBS (Yanshan Petrochemical 4303) and 20g of active nano calcium carbonate and stir at a low speed for 30 minutes, then add 0.4g of sulfur stabilizer and heat up to 190°C , high-speed shearing for 30 minutes, the composite modified asphalt was obtained, and its properties are shown in Table 1.
Embodiment 2
[0018] Heat 400g of Korean SK70# asphalt at 140°C until it flows completely, then add 16g of SBS (Yanshan Petrochemical 4303) and 12g of active nano calcium carbonate and stir for 30 minutes at low speed, then add 0.4g of sulfur stabilizer and heat up to 190°C, high speed Cut for 30 minutes to obtain composite modified asphalt. Its properties are shown in Table 2.
[0019] Table 2
[0020] Numbering Example 2 Comparative example 2 Asphalt raw material (g) 400 400 SBS(g) 16 16 Active Nano Calcium Carbonate (g) 12 0 Stabilizer (g) 0.4 0.4 Penetration, mm(25℃) 45 49 Penetration index 1.761 1.292 Softening point (℃) 66 62 Ductility, cm(5℃) 24 26 Kinematic viscosity, Pa·s(135℃) 1.71 1.53
Embodiment 3
[0022] Heat 400g of Korean SK70# asphalt at 140°C until it flows completely, then add 16g of SBS (Yanshan Petrochemical 4303) and 20g of active nano calcium carbonate and stir for 30 minutes at low speed, then add 0.4g of sulfur stabilizer and heat up to 190°C, high speed Cut for 30 minutes to obtain composite modified asphalt. Its properties are shown in Table 3.
[0023] table 3
[0024] Numbering Example 3 Comparative example 3 Asphalt raw material (g) 400 400 SBS(g) 16 16 Active Nano Calcium Carbonate (g) 20 0 Stabilizer (g) 0.4 0.4 Penetration, mm(25℃) 43 49 Penetration index 1.781 1.292 Softening point (℃) 69 62 Ductility, cm(5℃) 22 26 Kinematic viscosity, Pa·s(135℃) 1.80 1.53
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