Pavement

The Austroads Guide to Pavement Technology Part 4L: Stabilising Binders (AGPT Part 4L) focuses on pavement stabilisation achieved by the addition of stabilisation binders (reference should be made to AGPT Part 4D for more information about mechanical or granular stabilisation). It describes the types of binders most commonly used in the manufacture of stabilised pavement materials either by in situ construction practices or plant-mixed operations. Stabilisation provides engineering benefits and can lead to sustainability benefits as well (e.g. in situ recycling of a pavement reducing the need for non-renewable resources and overall emissions).

Stabilisation may be defined as a process by which the intrinsic properties of a pavement material are altered by the addition of materials to meet performance expectations in its operating, geological and climatic environment. The types of binders described in Part 4L are lime, cement, cementitious pozzolans, bitumen, chemical and synthetic polymers.

Information about the selection of the most appropriate binder type and quantity required for stabilisation of a particular material can be found in the Austroads Guide to Pavement Technology Part 4D – Stabilised Materials. Information about selection and design of pavements and pavement treatments that include stabilised materials can be found in the following parts of the Austroads Guide to Pavement Technology Part 2: Pavement Structural Design; and Part 5: Pavement Evaluation and Treatment Design.