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Why is asphalt mostly used for road paving now?
June 27, 2022
Asphalt is generally used in highway construction now, because the overall performance of asphalt pavement is better than that of hydraulic concrete.
In addition to high-grade roads, asphalt is now basically used on low-grade roads.

First of all, the overall flatness of the asphalt pavement is better than that of the concrete pavement, and the asphalt pavement does not have cross-cutting and longitudinal-cutting seams, so the driving is more comfortable than concrete, and the phenomenon of jumping is not easy to occur.

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Asphalt pavement is durable, corrosion-resistant, and especially resistant to carbon dioxide vapor in the environment, and can automatically coordinate expansion and contraction caused by temperature changes, so it is unnecessary to set expansion joints and shrinkage joints. As the vehicle travels more smoothly, the decibels of the noise produced by bouncing against the road are also reduced.
Concrete has indeed been widely used in the past few years, but when people found that concrete could not withstand the pressure of heavy trucks, they gradually abandoned it. After all, if a large depression appeared on the highway, it would cause serious traffic failures and other problems. Especially after rain and landslides, concrete will take away a large area of sunken land, which is very dangerous. And the maintenance, maintenance and repair of concrete pavement is more complicated than that of asphalt pavement.
Although the overall advantages of asphalt pavement are more than that of concrete pavement, the cost per kilometer is also much higher. Therefore, in the construction of some rural low-grade roads in some underdeveloped areas, economy is often considered.