If it is not solved well in the construction process, it will not only affect the construction quality and project cost of asphalt pavement, but also bring a high cost to the later use and maintenance of asphalt pavement, resulting in a waste of a lot of funds. Therefore, the asphalt pavement diseases should be carefully analyzed in the actual project, such as the treatment of asphalt mixture after aggregate segregation and temperature segregation.
Treatment method of asphalt mixture before rolling and forming.
① When coarse aggregate concentration occurs in the partially paved asphalt mixture in blocks, refueling can be used. The thickness and compactness of the loosely paved asphalt mixture after refueling should be consistent with the original loosely paved layer. Even if the segregation part has been preliminarily rolled, it should still be partially excavated; ② If there is a large area of banded coarse aggregate concentration, the method of manual mixing can be used, but it is not suitable in windy weather with low temperature; If it has been preliminarily rolled, the fine mixture can be added manually to embed the fine material into the gap of large aggregate.
Technical treatment of asphalt mixture after temperature segregation
① For a large area of low temperature area, and the low temperature in the low temperature area is lower than 110 ~ 120 ℃, the paved asphalt mixture shall be refuelled; ② For small areas with low pavement temperature, and the low temperature in the low-temperature area is higher than 110 ~ 120 ℃, the low-temperature area can be specially treated by increasing the number of rolling passes. During the rolling process, the amount of water sprayed on the roller must be strictly controlled to prevent the temperature drop of asphalt mixture from being aggravated by watering, so that its compactness meets the requirements.
In addition, Jinan asphalt concrete manufacturer will talk about the treatment method of the formed pavement:
① Conduct pavement water seepage test at the part where the coarse aggregate is concentrated. If the water seepage coefficient is too large, treatment should be considered; ② For surface or local block segregation, emulsified asphalt tack coat oil can be sprayed, and then an appropriate amount of stone chips can be spread for proper rolling. Remove excess stone chips after rolling to ensure surface flatness; ③ For the strip and large area segregation parts, the compactness inspection shall be carried out. In case of serious nonconformity, the cutting machine shall be used to cut vertically according to the marked range, and the newly mixed asphalt mixture shall be added for compaction.
The above is all about the problems and precautions introduced to you today. I hope it can help you. If you want to know more, you can contact us by phone or follow our website http://www.ycgjglcl.com , our staff will contact you in time.