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Analysis of Airfield Concrete Pavement with Crack Inducer at Early-Age
- 언어ENG
- URLhttps://db.koreascholar.com/Article/Detail/348266
Tensile stress occurs and random crack develops in concrete pavement slab when it contracts by variation of temperature and humidity. The tensile stress decreases and the random cracks are minimized by saw cutting the slab and inducing the crack with regular spacing. The sawn or formed joint depth must extend to between 1/4 and 1/3 of the pavement depth to ensure the formation of a clean crack. The ‘Crack inducers (Triangular timber)’ have been installed at bottom of concrete slab to minimize concrete disturbance during initial age. In particular, it is often used to relatively thick airfield pavement compared to road. There are slabs of various thicknesses at the airfield, but the crack inducers are often designed to be installed uniformly without analyzed the joint behaviour to slab thickness. In this paper, the installation of crack inducer considering thickness variation is analyzed and applied. As a result, random cracks or joint freezing wasn’t occurred anywhere on the runway.
