Compare in-situ Strength of Asphalt Concrete Base (ACB) to Cement Treated Base (CTB).

摘要

This report presents the results of plate bearing tests and deflection measurements comparing the relative in-place strengths of cement treated base (CTB) and asphalt concrete base (ACB). This research was performed to develop a K-value design chart for ACB to supplement the K-value design chart for CTB that is now in use in the California Highway Design Manual. Plate bearing tests were conducted on both ACB and CTB on highway project 05-Mon-1-R80.9/R85.0,and the in-situ K-values were compared with each other and with the current K-value design chart for CTB. The research used the ASTM Standard Plate Bearing Test. Deflection measurements were obtained with the Benkelman beam,the California Traveling Deflectometer,and the Dynaflect on several projects to compare in-situ strengths of various thicknesses of ACB and CTB.