Municipal construction: joint problems of asphalt pavement

Joint treatment of asphalt concrete pavement by first-class constructor: longitudinal joint: gouging → brushing adhesive layer oil → paving new material to soften the lower layer, then shoveling → rolling over the joint. Transverse joint: check the thickness flatness, remove the part with insufficient layer thickness → remove the muddy water to dry → brush the adhesive layer oil → preheat → spread the material horizontally and roll it vertically. Hot-mix asphalt mixture pavement should be naturally cooled in the paving layer until the surface temperature is lower than 50℃ before it can be opened to traffic. Do not pile soil or mix mortar on the surface. First-class architects recommend excellent road education to make the teaching content more in line with students' learning habits, truly realize the learning purpose and maximize the learning effect. Click to ask questions online.

Staggered joints are divided into transverse staggered joints and longitudinal staggered joints. Grinding is generally a transverse staggered position. Transverse width, left picture and right picture, when paving asphalt pavement, the overlapping position of the upper and lower layers should be staggered by more than 200mm, that is, when paving, the upper and lower layers of the left picture and the right picture cannot be staggered in one position; For example, if the road width is 30m, the width of the bottom bunk can be set to 14.9m on the left and15.1m on the right. When paving the upper floor, the width of the left picture can be set to 15. 1m, and the width of the right picture can be set to 14.9m, so that the transverse staggered joint is 20cm. The hot joint is continuously paved, and the residual temperature of asphalt has not subsided. If it is paved the next day and the asphalt has been rolled and cooled, it will become a cold joint.

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