This document discusses different types of bitumen, asphalt, and tar used in civil engineering materials. It provides details on: - Bitumen is derived from petroleum distillation and exists in liquid, semi-solid or solid forms. Its main uses include making flexible pavements for roads and waterproofing buildings. The main types of bitumen are straight-run, blown, emulsion, cut-back, and plastic bitumen. - Asphalt is a mixture of bitumen and inert materials left after petroleum distillation. It is used mainly in road construction. The two types are natural asphalt found in lakes/rocks, and residual asphalt from petroleum distillation.