In three days, the two kilometers of asphalt road was completed.
Asphalt had many advantages over cement. It was easier to lay down, more efficient, and easier to maintain. A cement road needed to be dried for at least a week before it could be used. Cement also swelled. If the difference in temperature was too much, it could crack or break.
On the other hand, asphalt could solidify within a few hours under regular temperature. Cars could go on it in 24 hours.
There weren't many pure asphalt roads anymore because it could produce carcinogens under high temperatures. Now, most asphalt roads used mixed materials. Asphalt was the main ingredient with fiber and other materials mixed in. This reduced the toxins released.
The cost also rose considerably, but Chen Zhao was willing to spend more money.
Large amounts of construction materials were sent to the site.
