Asphalt emulsions are an ideal way to stabilize bases. The water based emulsion mixes easily with aggregates, and the cured asphalt increases the material’s strength and stability.
Stabilizes, Cements and Waterproofs
Stabilization is defined as, “changing of aggregates by blending materials that increase the load bearing capacity, firmness and resistance to weather or displacement”. The asphalt binds the base together, increasing its strength and ability to resist deformation by the forces of traffic and water. Bases are normally gravel, sand, silt and clay. Some of the factors determining a base’s ability to carry a load include gradation, nature of fines, density, moisture content, drainage and loading rate. These are all considered when designing an emulsion stabilization.
Part of Staged Construction
Stabilization using emulsified asphalt can be the economical first step in upgrading an unpaved road. After completely curing, the stabilized material is often followed by a chip seal to protect the surface and improve macro-texture. Additional courses may be placed as increasing traffic demands dictate.
In-Place or Plant Mixed
The asphalt emulsion can be mixed in-place using a traveling mixer; the materials can be transported and mixed at a central plant; or aggregates may be imported and blended into the existing base.
Successful Stabilization
It’s important to make trial mixes in a laboratory to design the proper mix. Materials are selected for availability and compatibility with the existing base. Contact your local SemMaterials representative for the available systems which have been formulated to work best with local bases and give longer lasting roads, or for other help with finding cost-effective solution for your paving needs.
Click here for information on Fortress® Full Depth Reclamation / Granular Base Stabilization - a new system process for building strength down into pavements.