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Significant improvements have been made in base stabilization practice that include design specifications and methodology, experience with the selection of stabilizing additives, and equipment for distribution and uniform blending of additives. For the rehabilitation of existing pavements the stabilization of base material has delivered performance as good as or better than reconstruction at a reduced cost. Many additive products exist to stabilize base materials for roadway construction, but it is not always clear which additive is the right one to use. This guidebook intends to focus on stabilization for new construction and Stabilized Full Depth Reclamation (SFDR) and to help with the selection of suitable nonproprietary stabilization additives for individual specific project(s).

Base stabilization entails mixing a stabilizing additive into an acceptable base aggregate material, imported with or without recycled material or from reclaimed hot-mix asphalt (HMA), creating a new bound pavement layer. The fundamental value of stabilizing base materials is achieving similar pavement structures more economically. Stabilizing base aggregates can allow pavement designers to develop stronger, deeper pavement structures with reduced subcut depths and thinner surfacing lifts of HMA.

Report 2019RIC04 is a course on Lightly Surfaced Roads (LSR) with the stated objectives of: -Understand Lightly Surface Road (LSR) concept -Understand the advantages and disadvantages of LSR’s -Know the LSR applications -Understand keys to a successful LSR -Be familiar with some LSR failures and ways to avoid them -Understand the LSR treatment options -Be familiar with some online selection tools