Jinan asphalt construction manufacturer said that in the actual construction process, the construction process of colored asphalt concrete is not much different from that of ordinary asphalt concrete, but the following aspects need to be noted:
1. Preparation of base course and construction of prime coat: Before laying the lower asphalt mixture, clean the base course to ensure that the base course is slightly dry and clean, free from any loose stones, dust and impurities. Fuel injection. After spreading, it will not flow, penetrate into the base to a certain depth, nor form an oil film. The colored asphalt construction manufacturer said that before paving the upper layer, please clean the surface of the lower layer to ensure that there is no dust, dust and other debris on the surface, and then spray the viscous oil layer.
2. Determination of reference line: after the bottom layer is prepared, measure and set out, mark the thickness of loose asphalt material, and guide the control reference line of the running direction and height of the paver. Published.
3. Mixing and transportation of asphalt mixture: the color asphalt construction manufacturer said that the heating temperature of asphalt should be controlled at 170180 ℃ (the temperature of modified asphalt should be 1020 ℃ higher), and the mineral material should be 1020 ℃ higher than asphalt. The production temperature of asphalt mixture shall be controlled at 150175 ℃. After mixing, the asphalt mixture is uniform without whitening, separation and agglomeration of coarse and fine materials. The asphalt mixture is transported by dump truck. During transportation, the asphalt mixture is covered with waterproof tarpaulin. If the temperature is lower than the requirement, the particles have white spots, segregation, caking, moisture, etc. that do not meet the specification requirements, the mixture will be discarded.
4. Asphalt mixture paving: use asphalt paver with automatic leveling device to pave, and heat the whole slab to 80-100 ° C 30 minutes before paving. The rings of rainwater and sewage inspection wells are covered with steel plates, and the mixture is manually laid nearby and compacted. Ensure that the paving temperature is not lower than 110130 ℃.
5. Joint construction: when the sidewalk is constructed in two sections, natural joints are used for longitudinal joints. Before paving, remove the loose mixture at the interface. In the process of asphalt pavement paving, when the construction needs to be suspended, the lower layer adopts inclined joints and the upper layer adopts flat joints. After the construction of flat joints is completed on the same day, cut, clean and form joints.
6. Rolling asphalt mixture: the transverse joint is rolled before normal rolling. The joint shall be carried out in the direction perpendicular to the lane, and the support plate shall be placed on the longitudinal edge of the pavement, and its length shall be sufficient to make the roller leave the rolling area. The asphalt mixture shall be rolled immediately after being paved. The rolling steps are: initial compaction → recompression → final compaction.
7. Protection and opening of finished products: after the final pressure of the asphalt concrete pavement is completed, when the temperature of the pavement falls to the outdoor temperature, the tools and other debris on the pavement shall be removed before the pavement passes.
In addition, it should be noted that asphalt pavement is easy to penetrate, rut and crack. Maintenance is divided into two aspects: pretreatment and post-maintenance. In the early stage, we should try to select good aggregate, reasonable proportion and reasonable asphalt layer structure design; The maintenance of cracks in the later stage mainly includes spraying emulsified asphalt, grouting and local repair. Come to our website for more matters http://www.ycgjglcl.com consulting service