Why do we only build cement roads instead of asphalt roads in rural areas? Experts summarize 3 reasons
With the country's vigorous development of rural cultural economy, the economic construction of our country's rural areas is in full swing, and the "dirty, chaotic and poor" rural areas in our past impressions have also undergone earth-shaking changes. The dirt roads where agricultural vehicles used to go through the "sandstorm" for three days have all turned into smooth and bright concrete roads, but have you ever thought about why only concrete roads are built in rural areas, not asphalt roads? Let's hear what the experts have to say.
In everyone's opinion, the neat black pavement of the asphalt road is very smooth after rolling, and after the markings are painted, it looks more high-end and atmospheric. In comparison, the cement road appears monotonous and rigid in color. Why not build asphalt roads, experts summarize the following 3 reasons.
- Technical problems: As we all know, most of the rural areas have underdeveloped electric power, and the roads in the villages are also generally only 3m-5m. This severely limits the original conditions for the construction of asphalt roads. It is difficult for such narrow roads to meet the minimum requirements for mechanical paving and compaction such as pavers, smooth rollers, and paving machines in the city. At the same time, the paving of asphalt roads requires It is difficult to meet the paving conditions for the smooth roadbed conditions of the undisturbed rural roads with potholes and bumps.
Cost issue: Due to the continuous improvement of the quality requirements of urban roads in China over the years, the cost of asphalt in China is gradually increasing. In comparison, the cost of a ton of cement is now around 3500-4500, depending on the regional price, and the cost of a ton of cement is only a few hundred yuan. At the same time, in terms of freight, asphalt materials are far from origin and have a long transportation distance, which is a considerable expense compared to cement that can be purchased everywhere. Such a huge cost is also an important reason for building cement roads. .
Environmental issues: In China, rural areas are generally located in relatively remote and open places, as villages mainly focus on agricultural economic development. The environment that meets the farming conditions is a decisive factor that restricts the paving of asphalt roads. The softer soil in most rural areas is likely to cause subsidence or transverse and longitudinal cracks in the asphalt pavement. Especially in mountainous and rural areas, the temperature difference is large and it is easy to freeze. The thermal conductivity of pavement materials is a very critical constraint. Under various environmental conditions, cement pavement is obviously better.
Based on the above 3 points, rural roads are more suitable for building cement roads rather than asphalt roads. What are your opinions on the experts' 3 reasons?