Pre-Cast Concrete Panels for Contingency Rigid Airfield Pavement Damage Repairs

Temperature Sensitivity of Precast Concrete Panels Used for the Repair of Rigid Pavements

“…The FAA recommendations operate with load transfer (LT) values vary from 0 being poor performance to 0.5 being ideal performance. The cut off value for LT in the FAA recommendations is 0.25 (Ashtiani et al 2010). In order to correlate FAA LT value to LTE δ , a closed form relationship between both measures of load transfer efficiency had to be used.…”

“…The aforementioned techniques require removing the entire damaged section of concrete slab. Cast-in-place technique involves placing fresh concrete in the work site, while the precast concrete slab technique involves replacing the damaged section with one or more prefabricated concrete slabs (Ashtiani et al 2010). Although the two techniques can be suitable in meeting the requirements of a sound repaired section, the construction times required to repair the damaged sections diverge among the two techniques.…”

“…Evaluations have also been performed on the usage of precast concrete systems for the repair of flexible airfield taxiways with favorable results (Yue et al 2003). In an effort by the US Air Force Research Laboratory (AFRL), implementable protocols were developed to incorporate precast concrete slabs for the rapid damage repair of military runways (Ashtiani et al 2010). Although evaluations and practice protocols have been performed regarding the usage of precast concrete techniques, environmental parameters such as the influence of temperature fluctuation, humidity, and other environmentally driven stresses are often overlooked in performance evaluations.…”

Three-dimensional modelling of precast concrete pavement repair joints

“…Additional modelling efforts (Hachiya et al, 2001) focused on modelling a specialty precast panel load transfer mechanism. Ashtiani et al (2010) investigated a single-panel repair as a full-slab replacement using Islab2000. However, dowel slots were not modelled as individual components, and panels were assumed to be directly dowelled to the parent PCC.…”

“…This pass level was identified by the US Air Force as acceptable for temporary repairs conducted in an expedient manner. The initial research phase identified a single panel-repair precast system (Ashtiani et al, 2010) developed in 2009 that was capable of supporting F-15 (fighter) aircraft traffic.…”