Feasibility of Using Anti-stripping Additives as an Alternative to Hydrated Lime

Moisture damage in asphalt (also known as stripping) can significantly reduce the durability and strength of asphalt pavements, often resulting in expensive repairs. Hydrated lime is widely used in Australia to reduce the moisture susceptibility of asphalt mixes in service; however, potentially more sustainable additives (such as liquid anti-stripping agents) are also widely used internationally to reduce the risk of moisture damage in asphalt pavements.

Austroads has completed a project that investigated the use of alternative anti-stripping additives (other than hydrated lime) to reduce the moisture susceptibility of asphalt mixes in service.

An interim laboratory assessment protocol was developed to assess the effectiveness of different anti-stripping additives.

This webinar with Joe Grobler, Dr Chrysoula Pandelidi and Sean Dorahy presents:

• important factors affecting the moisture susceptibility of asphalt mixes
• commonly used moisture susceptibility test methods
• the main benefits and disadvantages of using hydrated lime or liquid anti-stripping agents
• an interim Austroads laboratory assessment protocol to evaluate the effectiveness of different anti-stripping additives.