The construction method of fiber reinforced asphalt concrete is basically the same as that of traditional asphalt concrete, which is divided into one process: inspection of incoming materials, selection of mixing equipment, mixing, paving and rolling. Next, Jinan asphalt concrete manufacturer will talk about the mixing requirements of fiber reinforced asphalt concrete.
1. Determine the mix proportion of each tray of hot material bin, calculate the quality of each tray of mixture, calculate the quality of fiber put into each tray of mixture according to the fiber consumption determined by the target mix proportion, and then pack the incoming fibers according to this quality. The packaging bags can be polyethylene plastic bags commonly used in the market. Ensure the accuracy of weighing during subpackaging. The addition of fiber is shown in the schematic diagram:
2. The asphalt mixture shall be trial mixed according to the design asphalt dosage. After trial mixing, samples shall be taken for Marshall test, and the test value shall be compared with the indoor mix proportion test results to verify the rationality of the design asphalt dosage. If necessary, appropriate adjustments can be made:
3. Determine the appropriate mixing time. For ordinary asphalt mixture, the mixing time of each batch of intermittent mixing equipment is 30-60 seconds. The recommended mixing time is 25-30 seconds for dry mixing and 30 seconds for wet mixing. The mixture shall be evenly mixed and the fiber and asphalt mixture shall be well coated;
4. Determine appropriate mixing and factory temperature. The heating temperature of asphalt (all refer to petroleum asphalt, the same below) should be 130 ℃~160 ℃, and the heating should not exceed 6 hours. The heating should be used up on the same day, and should not be repeated, so as to avoid the heating temperature of aging sand and gravel is 140 ℃~170 ℃, and the mineral is not heated. The factory temperature of asphalt mixture should be 130 ℃~160 ℃. When modified asphalt is used, it should be 10 ℃~15 ℃ higher than the upper limit of the above temperature. It is unnecessary to adjust the temperature when adding fiber.
In addition, the asphalt concrete pavement with fiber generally does not form oil spots during the forming process, and the color appearance is basically the same as that of ordinary asphalt concrete pavement. More relevant content will come to our website http://www.ycgjglcl.com Consult and understand!