Analysis and treatement of defected slabs on grade exposed to moving vehicles

Abstract EN

The slab on grade of a “Gas Station”, along the ring road, Kattamiya, Cairo, had suffered from many apparent and obvious cracks in almost all R.

C.

slabs designated for motor vehicle.

These defects, in gas station, were noticed only three months after the station was opened for public service.

The station suffered from defects in shrinkage joints, particularly in the heavy truck area.

Also, there was clear separation between the curb and slabs, tilting in the perimeter walls in addition to cracks in areas around inspection chambers and relative settlement between the adjacent R.

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slab segments.

The aforementioned defects were monitored and investigated.

In addition, all the available technical reports, data as well as the used stages of construction process, were investigated in order to assess the possible causes of such rapid defects.

A computer analysis for models of the defected slabs using “Finite Element Method” was carried out.

The models assume combined problems of the supporting soil materials underneath the R.

C.

slabs and the thickness and conditions of the reinforced concrete slabs to study the possible causes of the defects and assess its hazardous.

Accordingly, defining methods of treatment and avoiding such problems in future could be suggested.