Abstract
The performance of Portland Cement Concrete pavement depends on the support provided by layers under the concrete slab. Considering the importance of slab support on concrete pavement performance, a good quality assurance testing is needed for the construction of layers under the concrete slab. Deflection measurements on stabilized base could provide sound quality assurance testing. A threshold deflection value for construction acceptance was developed from the analysis of the field deflection data as well as theoretical analysis. Based on the information obtained, a protocol for quality assurance testing for base and subgrade construction was developed.
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