Introduction to asphalt: It is said that ancient Indians began to use asphalt to repair ships, and by the early 19th century, many people in Trinidad and Tobago began to use asphalt to build roads. The asphalt picked up with wooden sticks is dark and shiny, sticky and smooth, and has very good plasticity. People can't help but admire the magic of nature. However, asphalt lakes often stick to the feet of animals, making them unable to move, so they are also known as "animal killers".