Modified asphalt composition and production process thereof
A technology of modified asphalt and composition, which is applied in the treatment of dyed low-molecular organic compounds, dyed high-molecular organic compounds, building structures, etc., and can solve the problems of limited addition, difficult materials to handle, and high price of SBS.
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[0045] Example 1:
[0046] Step 1: Preparation of modified asphalt masterbatch.
[0047] The ratio of modified asphalt master batch (total weight is 100):
[0048] Asphalt 50 parts by weight
[0049] Core-shell modified filler 50 parts by weight
[0050] Asphalt selects Jiangyin 70# asphalt, core-shell modifier uses kaolin as inorganic particles, particle size is 2-20μm, shell polymer is SBS, and the weight ratio of inorganic filler to polymer is 80:20. Disperse and mix with a high-shear emulsifier, the mixing temperature is 150-180℃, the time is 60min, and the mixing speed is 4500 rpm.
[0051] Step 2: Preparation of reactive masterbatch
[0052] Distribution ratio of each group:
[0053] Asphalt 95 (parts by weight)
[0054] Sulfur 5 (parts by weight)
[0055] The asphalt is Jiangyin 70# asphalt, the sulfur is general industrial grade, the mixing temperature is 100℃, the high shear emulsifier is used, the mixing time is 20 minutes, and the mixing speed is 2500 rpm.
[0056] Step 3: Prepara...
Example Embodiment
[0058] Example 2:
[0059] The modified asphalt masterbatch and reactive masterbatch were prepared by the same method in Example 1. According to the weight ratio: 100 parts of asphalt, 20 parts of modified asphalt masterbatch, 5 parts of reactive masterbatch, placed in ordinary asphalt mixing device Medium stirring, temperature 190°C, reaction for 20 minutes, to obtain asphalt composition.
Example Embodiment
[0060] Example 3:
[0061] Step 1: Preparation of modified asphalt master batch
[0062] Modified asphalt master batch distribution ratio (total weight part is 100):
[0063] Asphalt 50 (parts by weight)
[0064] Core-shell modifier 40 (parts by weight)
[0065] SBS 10 (parts by weight)
[0066] The asphalt and core-shell modifier used are the same as in Example 1, and the SBS is Yuehua product XH-792. Use a high-shear emulsifier to mix, the mixing temperature is 150-180°C, the mixing time is 60min, and the mixing speed is 4500 rpm.
[0067] Step 2: Preparation of reactive masterbatch
[0068] The preparation of the reactive masterbatch is the same as in Example 1.
[0069] Step 3: Preparation of asphalt composition
[0070] According to weight ratio: 100 parts of asphalt, 15 parts of modified asphalt masterbatch, and 3 parts of reactive masterbatch are mixed in an ordinary asphalt mixing device at a temperature of 195°C and reacted for 30 minutes to obtain a modified asphalt composition.
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