It's a cram course on curled floors, efflorescence, or ASR. A spreadsheet program offers assistance with formwork design. Instant access to information that will help you understand building code requirements for concrete. Answers to questions about floor flatness, construction tolerances, or fire ratings. Selected by experts, this information on tightly focused problem areas includes full-text articles from Concrete International, Concrete Construction, manuals, standards, and research papers. American Concrete Institute. 248-848-3700.