A Self-Learning Manual - Institution of Engineers Mauritius

A Self-Learning Manual
Mastering Different Fields of Civil Engineering Works (VC-Q&A Method) Vincent T. H. CHU
difficulty in construction. Moreover, keyways are prone to failure in thin
concrete slabs where they are too large or too close to slab surface.
Fig. Non-keyway joint and keyway joint
10. For a concrete pavement constructed over a box culvert, why is it
important to match the location of transverse joints with boundary of
box culvert?
When a concrete pavement is constructed over a box culvert, it is important
to match the location of transverse joints with boundary of box culvert.
Otherwise, it is likely that full-depth transverse cracks would develop on the
pavement slabs just above the location of boundary of box culvert. In case
a layer of granular sub-base is introduced to place under the pavement
slabs, the sub-base layer serves as crack-arresting layer and the possibility
of development of transverse cracks in concrete pavement is reduced.
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