and other temporary road construction methods. 1. Earth Road Construction. … · Bituminous Road; Bitumen is the key material in this method. This method is the most preferred due to its flexibility. It made of four layers of bitumen. The bottom layer is the thickest and the subsequent three layers keep on thinning as the get to the top. One major advantage is its elasticity as it tends to acquire the shape of load above it.2 天前 · ADVERTISEMENTS: Materials Used for the Construction of Roads: Methods
