Summary Report of Experimental Study on Dehydration Crack Appearing in the Construction of Turpan Civil Airport Cement Concrete Pavement - The Issues and Discussion of Modern Concrete Science - page 200

Fig. 16.2 Dehydration crack
of a certain airport in Xinjiang

Fig. 16.3 Dehydration crack
of a certain airport in Inner
Mongolia

16.2.2 Harmfulness of Dehydration Crack

Detriments of dehydration crack on concrete are variable as length, width, and
depth of dehydration crack are different. According to our

field experience for many
years, it is summarized that detriments of dehydration crack on pavement slab can
be mainly divided into the following situation.

1. Decreasing frost resistance and permeability resistance of concrete drastically.

As dehydration crack is created on concrete surface, a penetrating passage of
outside water to inner concrete has been generated naturally, making frost resis-
tance and impermeability of concrete weak drastically.