United States Department of Transportation
i
Field Implementation of Compacted Concrete Pavement
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2020-05-01
[PDF-4.71 MB]
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Edition:Final Report (June 1, 2019-April 30,2020)
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Abstract:The main objective of this research is to investigate the performance of Compacted Concrete Pavement (CCP) with special design features of surface texture that can reduce construction cost and secure safe and durable surface texture. This research was part of a larger project undertaken by the City of Mexico, Missouri in collaboration with Missouri Department of Transportation (MoDOT). The CCP mixture was evaluated for key fresh properties (unit weight, air content, and Vebe consistency), mechanical properties (compressive strength, flexural strength, and modulus of elasticity), drying shrinkage, and durability (air-void system, freeze thaw resistance, scaling resistance, bulk and surface resistivity). The results of this project aimed to add value to the current state of practice related to the use of CCP, synthesize current technical knowledge, study the potential problems associated with the use of CCP in pavement construction in Missouri, and propose guidelines for best practice related to CCP construction. Test results indicate the reliability of mechanical properties for the investigated CCP material. The compressive and flexural strengths and elastic modulus of the investigated concrete were approximately 4970 psi, 410 psi, and 4120 ksi for cast-in-field samples and 4470 psi, 450 psi, 3550 ksi for core samples, respectively. The drying shrinkage was limited to 60 με after 70 d of testing, indicating low drying shrinkage. The durability tests showed that the CCP mixture can be classified as a mixture with moderate chloride ion permeability and acceptable resistance to de-icing salt scaling. However, the non-air entrained CCP showed poor resistance to freezing and thawing.
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