博文

目前显示的是 十二月, 2022的博文

What should be paid attention to in the compaction of asphalt pavement?

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 After the asphalt mixture is paved, it enters the compaction process. The compaction of asphalt mixture is an important aspect of asphalt pavement construction, and it is a very important process. In the process of pavement compaction, it must be equipped with sufficient large-tonnage compaction equipment, and try to use the most advanced two-wheel vibration roller. The compaction of asphalt pavement generally includes the following aspects: The initial pressure of the road surface, the re-pressure of the road surface and the final pressure of the road surface. 1. Initial pressure of the road surface The initial pressure is the primary link of road surface compaction. This link is generally carried out directly after the mixture is paved. Slow rolling 2-3 times, the temperature of the initial pressing link is generally kept between 110-140 degrees Celsius. Therefore, as long as the compaction equipment with relatively small tonnage can play a very good effect. Under normal circumstanc

When Did Asphalt Pavement Exist?

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 1. Development history of asphalt pavement: About 600 AD, the first asphalt road was built in Babylon, but the technology was lost soon after. In 1712, taking the discovery of rock asphalt in Switzerland as an opportunity, it was subsequently discovered in Germany, France and other countries. Around 1850, France first used rock asphalt for road pavement. In 1854, a thin-layer asphalt pavement close to the present was built in Paris, which can be called the beginning of hot paved rock asphalt pavement. The rock asphalt used at that time was limestone infiltrated with 6-10% asphalt, which was broken into fine particles, heated, paved and rolled, and the asphalt pavement was formed. The maximum particle size is 2.5mm, and the powder particle size of 0.074mm can reach more than 40%, which became the advanced pavement structure at that time. The United States did not import a large amount of rock asphalt from France and Switzerland until after 1850, and began to build rock asphalt pavement