As a new construction material,foam concrete is applied in the construction of roads and bridges during the roadbed, embankments, offloading replacement, replacement soft soil, abutment fill, bridge back fill, fill deck offloading and other fields, which can effectively reduce the backfill loads in the high fill sections, tunnel and underground continuous passage, reduce stress foundation and foundation uneven settlement, and absorb road impact energy. Lightweight concrete can also effectively solve for soft embankment bridge jumping, alpine region embankment road widening and insulation and other issues, increased road project stability and safety factor.At the same time, cellular lightweight concrete can reduce the project cost and maintenance costs.