Displaced Fine Particulates Technical Note: DFP – Displaced Fine Particulates Since the introduction of coal fly ash into many of the new concrete mix designs, fine particulates are troweled into the surface where they have the probability of being displaced from the concrete. This is especially evident when any adhesive type material is applied to…
“How to Minimize Shrinkage” Originally published in Concrete Contractor Written by: Kim Basham, PhD PE Drying shrinkage is the root cause of random cracking in unreinforced concrete floors. Drying shrinkage is caused by a loss of moisture from the concrete. It occurs after concrete hardens and continues months and even years depending on the slab…
Polyurea Life Expectancy Discussion A question has recently been asked as to the life expectancy of a polyurea spray elastomer system as it relates to an application in an immersed saltwater environment. While this question is really not new to the technology, it seems that there has not been any published data or information to…
QUV Weatherometer Testing: (ASTM G 53) QUV Weatherometer accelerated testing (ASTM G 53) has been used as a tool to evaluate the performance of polyurea spray elastomer systems. By using this technique, one can observe the physical affects of simulated sunlight on the surface properties of the exposed elastomer as well as physical property retention.…
FSS 45DC™: Direct Food Contact Certification Coating Extraction Tests SAMPLE DESCRIPTION: The Client submitted a cured black polyurea coating identified as FSS 45DC™. REQUEST: Determine compliance of the coating to 21CFR 175.300 for contact with nonacid aqueous food products, under high temperature heat-sterilized use conditions. METHOD: The sample was subjected to the extraction test outlined in…
VF 340™: Class I Flame Resistant Certification ACCREDITATION: To ISO/IEC 17025 for a defined Scope of Testing by the International Accreditation Service SPECIFICATIONS OF ORDER: Determine the Flame Spread and Smoke Developed Indices based upon a single test conducted in accordance with ASTM E 84-12c, as per VersaFlex Inc. Purchase Order No. L062813-JW1 and Exova…
FSS 50DM™: Direct Food Contact Certification Determine compliance of the coating to FDA extraction tests for Condition B use with Type II food SAMPLE DESCRIPTION: The Client submitted twelve 1/2 pint jars coated with VersaFlex FSS 50DM™, Project 13-0089. REQUEST: Determine compliance of the coating to FDA extraction tests for Condition B use with type…
VF 380™ Approval from Florida Department of Environmental Protection RE: DEP Approval of the VersaFlex VF-380™ [and PV-380*] coatings, File No. EQ-686 The Bureau of Petroleum Storage Systems as concluded its review of the Equipment Approval request dated September 24, 2007, that was submitted for the above referenced coatings pursuant to Rule 62-762.851, Florida Administrative…
“Big Changes for Texas Tanks” By: Stephanie Marie Chizik Originally published in: Download full PDF as it appeared in Coatings Pro Magazine What do you get when you take a major pipeline company and add in two deteriorating storage tanks and a mandatory shut-down during restoration? You get a tight deadline, a fast fix,…