scope:

Merchandise Details

This engineering bulletin provides the necessary background information for the proper selection and application of subbases and the appropriate consideration of subgrade variables for concrete pavements used for streets, roads, and highways. It emphasizes the major objective of obtaining long-lasting uniform support for a concrete pavement. Subgrade soil material classification and problems (expansion, heaving, etc.) are discussed in detail, along with many various options for stabilized and unstabilized subbases, and the materials of which they are composed. Multiple reasons for avoiding the use of permeable subbases (a.k.a. drainable or open-graded subbases) also are presented.