The mud-like mixture contains fly ash, sand, cement, water and a few chemical secret ingredients. Artificial dirt begins as a slurry about the consistency of a very thick pea soup, according to Naik. It is transported and poured much like ready-mixed concrete at the construction site. After the slurry is poured, it begins to harden. In a few hours, it achieves and maintains a consistency that's equivalent to or better than real dirt.
Workers can later dig through the artificial dirt to check repairs,if necessary.
Tires are a prime recycling target primarily because there are so many of them. Naik's idea isn't to put worn out tires back on the road. He wants to put them in the road. Instead of burning old tires, which is what happens to most of them, I'd like to see bits of pulverized tires added to concrete and asphalt used in roadway construction, says Naik. The ragged black bits vary in consistency from coarse to fine and ultra-fine.