Experiences Resulted from Construction of Two-way Post-Tensioned Concrete Pavement

In this paper there are presented results of experimental investigation and preliminary conclusions dealing with the efficiency of early posttensioning concrete pavement. Short section of concrete pavement 3.5 by 20.0 m (11.5 by 65.6 ft) thickness 0.23 m (9 in.) was posttensioned in longitudinal and transverse direction. The total prestressing was realized in one stage after 48 hours from concreting. The unbonded tendons 75 mm (0.6 in.) were tensioned with 200 kN (45 kip) force in both direction. The aim of investigation was the experimental evaluation of temperature and concrete strains distributions during the process of pavement concrete hardening for different environmental condition for period of 13 months. Values of prestressing force distribution were monitoring for 26 days period. For this reason, unbonded tendons were equipped with vibrating wire force transducer Geokon type. The concrete strains as well as temperature changes were recorded with Geokon vibrating wire sensors localized at three levels of the slab thickness in four vertical cross-section.