I propose creating a standard test method for the evaluation of monomolecular film forming agents used as initial cures, also known to the construction industry as evaporation reducers and more commonly as evaporation retarders.
Keywordsmonomolecular; reducer; retarder; evaporation
Monomolecular film forming agents have been used since the 1920s to reduce the evaporation of water supplies. This technology has been adopted to the concrete industry to act as an evaporation reducer for freshly placed concrete, with many manufactures providing a version on the evaporation retardant. Evaporation retarders are included in ACI best practices as an initial cure with references in ACI 302, 308, and 345, yet there is not a standard test method to quantify their effectiveness. The lack of standardized testing was illustrated in the Federal Highway publication, FHWA-HRT-05-038 from August 2006. After conferring with Cyler Hayes, approximately 15 years ago Mike Morrison and Joel Levenberg began the process creating a testing program around ASTM C1579 with their research initially shared with ASTM in December of 2006 and 2007. I would like to re-explore the possible use of modified ASTM C157, C156, or C1579 to test the effectiveness of monomolecular film forming agents.
The title and scope are in draft form and are under development within this ASTM Committee.Back to Top
Draft Under Development