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Water Retaining Concrete

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I am designing retaining walls which will form the edges of a lagoon. The
first two walls we poured have cracks which go completely through the wall.
The cracks appear to be shrinkage cracks. The mix design uses 4000 psi
concrete with flyash, super P and well graded aggregate. The walls are
between 10 and 20 ft. high and 2 ft. thick. Vertical steel is # 7 @ 12 back
side and  #5 at 12 water side. Horz. steel is # 5 @ 12 both faces. Crack
control joints are located at 25 ft. O/C. This follows ACI 350
recommendations. I am worried about the damage to the rebar from the
chlorinated water moving through the cracks. We do not intend to waterproof
the lagoon but we do need to insure the structural integrity of the wall.
The existing cracks are from .002" wide to .035" wide and will be injected
but I have a lot of wall left to pour. If any one knows of a good authority
on cast in place concrete for water retention I would be interested.