This report summarizes preliminary site investigations, design criteria and procedures, construction criteria and procedures, and results of initial and final evaluations of an experimental road base utilizing lime kiln dust, fly ash and aggregate. Observed performance has been satisfactory. Compressive strength evaluations indicate exceptional early strength and continued strength gain of the pozzolanic base. Back calculation of specific elastic layer moduli indicate that the moduli of the pozzolanic base material is most likely within a range of 500,000 to 1,000,000 psi.

Based upon observations to date, treated bases enhance overall pavement performance and their use should be continued. It is quite probable that pavement life may be extended at reduced costs.

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The contents of this report reflect the views of the authors , who are responsible for the facts and accuracy of the data presented herein. The contents do not necessarily reflect the official views or policies of the University of Kentucky , the Kentucky Transportation Cabinet, or the Federal Highway Administration. Th is report does not constitute a standard , specification , or regulation. The inclusion of manufacturer names or tradenames are for identification purposes and are not to be considered as endorsements.