Estudo de gradientes térmicos e deformações em "whitetopping" ultradelgado. / Thermal gradients and deformations in ultra-thin witetopping.

AUTOR(ES)
DATA DE PUBLICAÇÃO

2001

RESUMO

In this work, several factors affecting behavior and performance of ultra-thin whitetopping were evaluated taking advantage of a full scale experimental pavement, restored by applying such technique. Temperatures and thermal gradients in concrete thin slabs were evaluated by almost one year, comprising al the seasons. Load tests were carried out to allow strains measurements on concrete as well to define the deflection basins on whitetopped pavements. The experimental research has permitted to verify the dependence of thermal gradients on air temperature and solar radiation among other factors. It was observed that the thermal gradients practically do not affect behavior of the thin slabs. Stresses received from load tests compared to finite element generated stresses shown to maintain a good and closed relation. Due to good performance observed along the experiment it became not possible to establish patterns of functional performance. Expressive decrease of deflection level was observed over concrete overlays allowing to infer some load transfer on joints when the slabs are to be laid over non distressed old asphalt pavements.

ASSUNTO(S)

pavimentos de concreto instrumentation load tests thermal gradients gradientes térmicos concrete pavements strain-gage instrumentação provas de carga

ACESSO AO ARTIGO

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