Abstract:
Since the aviation business is continuously growing, the testing of the strength of the airfield pavement structure for safety reason is crucial. The process of identifying the load transfer efficiency (LTE[delta]) of pavements and specifying voids beneath slabs defined in the international standard are time consuming. Therefore, this research aims to study the correlation between the two aforementioned parameters.
The nondestructive tests of the Phuket and Hat Yai airfield pavement have been performed by using Heavy Falling Weight Deflectometer followed the Federal Aviation Administration standard. The tests were conducted at the center of the slabs joint with 220 kN load to identify the LTE[delta] value. On the identical slabs the tests were performed at the slabs corner with 160, 190 and 220 kN load to specify voids and analyze their relation based on the coefficient of determination (R[superscript2]).
Regarding to the results it has been found that when comparing the whole LTE[delta] value, with both cases, voids present and no voids present, the R[superscript2] is very low or show no relation between these two variables. In the case of LTE[delta] is greater than 50% and voids present, the relation of these two variables is increased with R[superscript2] of 0.25. When the LTE[delta] is greater than 70% and voids present, the relation of these two parameters is the most evident with R[superscript2] of 0.60, to summarize this relation mathematically, a simple linear regression analysis has been generated and discussed in this paper.