Discussion on Pavement Crack of Expressway
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1. Common types of cracks
(1) transverse cracks. The transverse joint is the most common crack in the asphalt pavement of freeway. Most of the transverse joints are reflection cracks caused by semi-rigid basement cracking,[url=http://roadroutercrack.com/blog-new/1803.html]Cheap Mobile Devices Pavement Heating Plate[/url] but also include temperature shrinkage cracks. When rainwater infiltrates the pavement structure layer along these cracks, it will shorten the service life of pavement. (2) longitudinal cracks. Divided into top-down surface cracks and bottom-up fatigue cracks. This kind of crack is mainly caused by the non-settlement of the roadbed. When the compaction is not uniform during the construction of the subgrade,[url=http://roadroutercrack.com/blog-new/2848.html]practical asphalt milling machine cost[/url] there will be a phenomenon of local compaction. After the vehicle is opened to traffic, the roadbed will be further compacted. Junction, leading to the formation of longitudinal cracks. (3) network crack. When the base local strength is insufficient, such as less cementing material, aggregate segregation, lack of compaction, as well as subgrade and surface layer of insufficient strength, such as deformation, subsidence, porosity is too large,[url=http://roadroutercrack.com/blog-new/6436.html]Good Road Pavement Grooving and Repairing Scheme[/url] once subject to the role of heavy vehicles The surface layer will be broken into cracks, deformation into a network crack. |
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