3 sentences

1. 工人们正在街道上铺设沥青。

   gōng​rén men zhèng​zài jiē​dào shàng pū​shè lì​qīng.

   Workers are paving the street with asphalt.

   Source: Dong Chinese Dictionary

2. 这条新修建的公路正在铺设沥青路面。

   zhè tiáo xīn xiū​jiàn de gōng​lù zhèng​zài pū​shè lì​qīng lù​miàn.

   Asphalt paving is being applied to this newly built highway.

   Source: Dong Chinese Dictionary

3. 在铺设沥青之前，必须确保路面的基层已经夯实。

   zài pū​shè lì​qīng zhī​qián, bì​xū què​bǎo lù​miàn de jī​céng yǐ​jīng hāng​shí.

   Before laying the asphalt, it must be ensured that the subgrade of the road has been compacted.

   Source: Dong Chinese Dictionary