What could have been done when our recent paving job was interrupted by rain? We got the surface covered but the texture was damaged, mainly by the covering.
The American Concrete Paving Association has published a Technical Bulletin, Number 17, called "Concrete Pavements Exposed to Rain During Construction," which offers advice on this subject. Where the texture has been damaged by a protective cover the concrete should be retextured if it has not yet hardened. This should be done even if it exhibits a smooth, sandy appearance. An attempt should be made to produce the specified texture. A membrane curing material should then be applied. No other remedial work is needed. If the surface has suffered enough erosion so that coarse aggregate is exposed it should be reworked by hand methods or, if a paver is being used, by the finishing machine. Fresh concrete containing the same materials and having the same properties as the pavement concrete must be added to maintain an adequate supply in front of the screeds or machine and to assure replacement of the concrete eroded from the surface. The surface should then be textured and cured as specified. If pavement edges have been severely eroded and the concrete has not set, the edges should be repaired by setting side forms and putting in fresh concrete to replace what was eroded. This should be finished prior to texturing and curing. The same bulletin, available for $1 from the American Concrete Paving Association at 1211 West 22nd Street, Oakbrook, Illinois 60523, also gives information on what to do if the concrete has hardened before remedial work can be done.