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This report presents a mechanistic approach and procedures for determining layer coefficients to characterize the in-situ behaviors of rubblized pavements. This procedure was developed based on the 1993 AASHTO Pavement Design Guide utilizing Falling Weight Deflectometer (FWD) testing and in-place simulation using back-calculation layer modulus. In order to evaluate the rubblized pavement systematically, twelve constructed pavement sections were tested extensively by FWD testing annually after construction. The FWD data was processed using the proposed mechanistic procedure. In addition, statistical analysis was conducted to compare the pavement structure parameters each year, including layer coefficient and in-situ resilient modulus using Analysis of Variance (ANOVA) and Z-tests. In the ANOVA, the comparison of the structure capacities derived from the field FWD tests with those from the mechanistic procedure supports the null hypothesis, which concluded there is no difference between the structural numbers from these two methods. Also, statistically, the layer coefficients in each year are significantly different. The insitu resilient moduli for each year varied significantly. The results from Z-tests show that for Hot Mixed Asphalt (HMA) layers, the layer coefficient confidence interval could be as high as 0.70 and as low as 0.38. For the base layers, the layer coefficient confidence interval could be as high as 0.25 and as low as 0.16. A layer coefficient of 0.42 is recommended for HMA and 0.22 for the rubblized layer for the design of HMA overlay on rubblized PCC pavement. DD: For most professional documents, lines are singlespaced. But at this draft stage, readability is important, so the document is double-spaced. Also notice how the section headings are clear. This is important for such a long document. ORG: The abstract is well written: it explains what the document achieves, provides some background, overviews research goals and methods, and it presents results. Most abstracts are written last even though they are the first thing audiences read.

Mechanistic Evaluation of Rubblized PCC Pavements