Penetrating Concrete Surface Treatment
Applying penetrating concrete treatment (silane or other penetrating
sealers) to concrete surfaces is beneficial to reduce deicing salts
from penetrating the concrete. When salt reaches the reinforcing steel,
it will corrode and result in spalling concrete. The most effective
means of ensuring performance from silane is proper concrete surface
preparation prior to application. Shot blasting the surface is believed
to be the best surface preparation treatment, then abrasive blasting.
Lastly water blasting is also allowed, but intensity of water must
be sufficient to prepare the surface to absorb the sealer plus the
concrete must be allowed to dry out sufficiently to accept the material which
makes this the least desirable surface treatment. When traffic control
is set up across a bridge for roadway work, it is a good practice
to address the concrete bridge deck while mobilized. Maximum recommended
reapplication interval is ten years.