Evaluation of Several Types of Curing and Protective Materials for Concrete. Part I. Laboratory and Outdoor Exposure Preliminary to Field Trials

摘要

Numerous proprietary products which are claimed to improve durability have been marketed as protective coatings, curing agents or combinations of the two. The end purpose of the project was to evaluate the performance of several of these materials under field conditions. Discussed is the research which consisted of preliminary evaluation testing to select the materials to be placed in the field. White pigmented resin, white polyethylene, and chlorinated rubber curing compounds were tested in combination with linseed oil protective coatings and a monomolecular film for their effects in retarding evaporation during the early stages of hydration. Based upon the data and discussion presented in the report it was concluded that: Properly entrained air is overwhelmingly the most effective defense against scaling caused by deicing chemicals; When insufficient entrained air is obtained, linseed oil treatments delay the onset of scaling; Linseed oil treatments are effective when applied to concrete previously cured with resin based curing membrane; Chlorinated rubber used as a combination curing and protective sealant is not effective on poorly air entrained concrete; The monomolecular evaporation retarding film showed some beneficial effects on resistance to scaling of non-air entrained concrete. (Author)