Coal asphalt/SBS (Styrene Butadiene Styrene)/waste colloid powder composite modified asphalt and preparation method thereof
A technology of composite modified asphalt and coal tar pitch, which is applied in the direction of building components, building insulation materials, buildings, etc., can solve problems such as difficulty in adapting to high-grade roads, incomplete swelling and dissolution, and high temperature sensitivity, so as to reduce the asphalt ratio and Road construction cost, reduction of reflective cracks on the road surface, and the effect of large micellar particles
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[0029] Example 1
[0030] A coal tar / SBS / waste rubber powder composite modified asphalt and a preparation method thereof. The preparation method is:
[0031] Step 1. Put 73~80wt% petroleum pitch and 4~7wt% medium-temperature coal pitch into the reaction tank, and use peripheral heating to raise the temperature to 160~180℃, and then under the same temperature and 150~300r / min conditions, Add 3~4wt% linear block copolymer, and then shear with a colloid mill for 0.4~0.6h.
[0032] Step 2. Under the temperature conditions of step 1, add 10-16wt% of waste rubber powder to the product obtained in step 1, and then turn on the bottom electric heating device of the reaction tank, and when the bottom temperature rises to 180~200℃, First, stir at 150-300 r / min for 0.4-0.6h, and then shear for 0.4-0.6h with the colloid mill to refine the product after secondary shearing.
[0033] Step 3. This step is carried out at 170~180℃ and 150~300r / min. The product obtained in step 2 is pumped to the devel...
Example Embodiment
[0034] Example 2
[0035] A coal tar / SBS / waste rubber powder composite modified asphalt and a preparation method thereof. The preparation method is:
[0036] Step 1. Put 73~80wt% petroleum pitch and 4~7wt% medium-temperature coal pitch into the reaction tank, and use peripheral heating to raise the temperature to 160~180℃, and then under the same temperature and 150~300r / min conditions, Add 1~2wt% of the star block copolymer, and then shear with a colloid mill for 0.4~0.6h.
[0037] The rest is the same as in Example 1.
Example Embodiment
[0038] Example 3
[0039] A coal tar / SBS / waste rubber powder composite modified asphalt and a preparation method thereof. The preparation method is:
[0040] Step 1. Put 73~80wt% petroleum pitch and 4~7wt% low-temperature coal pitch into the reaction tank, and use peripheral heating to raise the temperature to 160~180℃, and then under the same temperature and 150~300r / min conditions, Add 3~4wt% linear block copolymer, and then shear with a colloid mill for 0.4~0.6h.
[0041] The rest is the same as in Example 1.
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