Record Display for the EPA National Library Catalog


Main Title Laboratory Assessment of the Permeability and Diffusion Characteristics of Florida Concretes. Phase 1. Methods Development and Testing.
Author Snoddy., R. ;
CORP Author Acurex Corp., Research Triangle Park, NC.;Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab.
Publisher Apr 94
Year Published 1994
Report Number EPA-68-DO-0141; EPA/600/R-94/053;
Stock Number PB94-162781
Additional Subjects Concrete slabs ; Permeability ; Radon ; Florida ; Diffusivity ; Tests ; Porosity ; Slab on ground construction ; Construction management ;
Library Call Number Additional Info Location Last
NTIS  PB94-162781 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 115p
Much of Florida's natural soil and sand recovered from the phosphate mining/beneficiation process there contain significant quantities of radium. Buildings constructed on these high-radium soils have been found to contain elevated radon levels. To decrease elevated indoor radon levels, Florida's legislature instructed its Department of Community Affairs to develop new construction standards for radon-resistant buildings, primarily slab-on-grade constructions. Primary research objectives were as follows: to establish the capability to measure concrete's permeability and diffusivity; to measure these parameters in a small sampling of the typical types of Florida concrete; and, if possible, to correlate the physical parameters of the concrete (mix design, porosity, surface finish, etc.) to the measured diffusion and permeability coefficients.