Construction method for paving expressway with asphalt concrete
A technology of asphalt concrete and construction method, which is applied to the coagulation pavement, roads, roads and other directions of on-site paving, can solve the problems of highway pavement structural deformation, economic loss, safety hazards, etc., to ensure stability, avoid fracture, reduce crack effect
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Embodiment 1
[0025] Prepare materials before construction:
[0026] Asphalt: Grade A petroleum asphalt No. 70;
[0027] Coarse aggregate: gravel particle size is 3-5mm, and the gravel is hard, clean, and does not contain weathered particles;
[0028] Fine aggregate: the particle size of fine aggregate is 1-2mm;
[0029] Filler Ⅰ: Mineral powder obtained by grinding limestone and quartzite, and the mass ratio of limestone and quartzite is 9.9:0.1
[0030] Filler Ⅱ: Limestone slag powder: slag powder obtained by grinding limestone;
[0031] Nylon 66 fiber: length 2-4cm, diameter 0.2-0.5mm;
[0032] Metal fiber: aluminum fiber, length 2-4cm, diameter 0.2-0.5mm.
[0033] (1) Material mixing:
[0034] Material A: Control the temperature of the asphalt at 150-190°C, add coarse aggregate, fine aggregate and nylon 66 fiber during the mixing process, add filler I after stirring evenly, and keep the evenly mixed mixture at 150-170°C The parts by weight of the pitch is 7 parts, the parts by wei...
Embodiment 2
[0042] Asphalt: Grade A petroleum asphalt No. 70;
[0043] Coarse aggregate: gravel particle size is 3-5mm, and the gravel is hard, clean, and does not contain weathered particles;
[0044] Fine aggregate: the particle size of fine aggregate is 1-2mm;
[0045] Filler Ⅰ: Mineral powder obtained by grinding limestone and quartzite, and the mass ratio of limestone and quartzite is 9.9:0.1
[0046] Filler Ⅱ: Limestone slag powder: slag powder obtained by grinding limestone;
[0047] Nylon 66 fiber: length 2-4cm, diameter 0.2-0.5mm;
[0048] Metal fiber: aluminum fiber, length 2-4cm, diameter 0.2-0.5mm.
[0049] (1) Material mixing:
[0050] Material A: Control the temperature of the asphalt at 150-190°C, add coarse aggregate, fine aggregate and nylon 66 fiber during the mixing process, add filler I after stirring evenly, and keep the evenly mixed mixture at 150-170°C The parts by weight of the pitch is 10 parts, the parts by weight of the coarse aggregate is 80 parts, the par...
Embodiment 3
[0057] Asphalt: Grade A petroleum asphalt No. 70;
[0058] Coarse aggregate: gravel particle size is 3-5mm, and the gravel is hard, clean, and does not contain weathered particles;
[0059] Fine aggregate: the particle size of fine aggregate is 1-2mm;
[0060] Filler Ⅰ: mineral powder obtained by grinding limestone and quartzite, and the mass ratio of limestone and quartzite is 9.9:0.1;
[0061] Filler Ⅱ: Limestone slag powder: slag powder obtained by grinding limestone;
[0062] Nylon 66 fiber: length 2-4cm, diameter 0.2-0.5mm;
[0063] Metal fiber: aluminum fiber, length 2-4cm, diameter 0.2-0.5mm.
[0064] (1) Material mixing:
[0065] Material A: Control the temperature of the asphalt at 150-190°C, add coarse aggregate, fine aggregate and nylon 66 fiber during the mixing process, add filler I after stirring evenly, and keep the evenly mixed mixture at 150-170°C The parts by weight of the pitch is 8 parts, the parts by weight of the coarse aggregate is 75 parts, the par...
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