Preparation method of compound modified asphalt
A compound modified asphalt and compound modification technology, applied in the field of road engineering materials, can solve the problems of strict construction conditions, long maintenance time, water seepage on the road surface, etc., and achieve good economic benefits, excellent flame retardant and smoke suppression, and good road use performance effect
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Embodiment 1
[0023] The preparation method of the present embodiment composite modified asphalt comprises the following steps:
[0024] Step 1. Weigh various mineral powders in the following mass percentages: 59.4% of sillimanite powder, 39.2% of andalusite powder, and 1.4% of andesite powder; then mix the weighed various mineral powders evenly to obtain a mixed powder; The particle size of sillimanite powder, andalusite powder and andesite powder is 37μm~74μm;
[0025] Step 2, adding the dispersant to the mixed powder described in step 1 and mixing uniformly to obtain the mixed powder after dispersion treatment; the dispersant is the isopropanol solution of stearamide, and the isopropanol of the stearamide is The mass ratio of rigid amide and isopropanol in the solution is 1: 1.2; the addition of the dispersant is 0.5% of the mixed powder mass;
[0026] Step 3, adding the surfactant to the mixed powder after the dispersion treatment described in step 2 and mixing evenly to obtain the mix...
Embodiment 2
[0030] The preparation method of the present embodiment composite modified asphalt comprises the following steps:
[0031] Step 1. Weigh various mineral powders in the following mass percentages: 23% of sillimanite powder, 76.1% of andalusite powder, and 0.9% of andesite powder; then mix the weighed various mineral powders evenly to obtain a mixed powder; The particle size of sillimanite powder, andalusite powder and andesite powder is 61μm~165μm;
[0032] Step 2, adding the dispersant to the mixed powder described in step 1 and mixing uniformly to obtain the mixed powder after dispersion treatment; the dispersant is the isopropanol solution of stearamide, and the isopropanol of the stearamide is The mass ratio of rigid amide and isopropanol in the solution is 1:1; the addition of the dispersant is 0.8% of the mixed powder mass;
[0033] Step 3, adding the surfactant to the mixed powder after the dispersion treatment described in step 2 and mixing evenly to obtain the mixed p...
Embodiment 3
[0037] The preparation method of the present embodiment composite modified asphalt comprises the following steps:
[0038] Step 1. Weigh various mineral powders in the following mass percentages: 43% of sillimanite powder, 56% of andalusite powder, and 1% of andesite powder; then mix the weighed various mineral powders evenly to obtain a mixed powder; The particle size of sillimanite powder, andalusite powder and andesite powder is 150μm~212μm;
[0039] Step 2, adding the dispersant to the mixed powder described in step 1 and mixing uniformly to obtain the mixed powder after dispersion treatment; the dispersant is the isopropanol solution of stearamide, and the isopropanol solution of the stearamide The mass ratio of rigid amide and isopropanol in the solution is 1: 1.5; the addition of the dispersant is 0.6% of the mixed powder mass;
[0040]Step 3, adding the surfactant to the mixed powder after the dispersion treatment described in step 2 and mixing evenly to obtain the mi...
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