Effectiveness of Standards for Mitigating Damage in Concrete Due to Materials Deficiencies

Standards are an important part of the process of technology transfer from research and development (R&D) to practice. The purpose of this report is to explore the effectiveness of standards in accomplishing this task for materials properties that cause damage to concrete. The main thesis is that standards do a good job of addressing the main technical issues relating to materials properties, but seemingly less critical issues are sometimes overlooked. This condition sometimes persists for a long time, and sometimes is found to be the basis of chronic problems in practice that can be significant. Standards development for concrete and concrete making materials became a significant process starting around the start of the twentieth century. ASTM (formerly American Society of Testing and Materials), which is the principal standards development organization in the U.S. for cement and concrete materials was organized at about this time. ASTM committee C1 on cement was organized in 1902 and committee C9 on concrete and concrete materials was organized in 1914. The American Association of State Highway Transportation Officials (AASHTO) also develops and manages concrete and concrete materials standards. Many AASHTO standards are based on ASTM standards and some are uniquely AASHTO developed. ACI (formerly American Concrete Institute) is the principal organization that develops and maintains standards on concrete design and construction practice. While all standards are updated on a regular basis, as required by regulations of the managing standards organization, a number of them have gaps in coverage of problems that seem to have persisted for a long time and are the source of chronic problems. The problems caused by these gaps tend be sporadic in nature, but when they do occur, the consequences to the particular structure can be significant with respect costs and/or service life. Some of the problems are general in nature, found commonly in many standards. These include significance of field service records, precision and bias of test methods, sampling, and basis for specification limits. Other problems are specific to details of individual standards. Some examples of these will be presented.

Language

  • English

Media Info

  • Media Type: Digital/other
  • Features: References; Tables;
  • Pagination: 15p
  • Monograph Title: 2014 FAA Worldwide Airport Technology Transfer Conference Proceedings: Innovations in Airport Safety and Pavement Technology

Subject/Index Terms

Filing Info

  • Accession Number: 01538339
  • Record Type: Publication
  • Report/Paper Numbers: P10025
  • Files: TRIS, ATRI, USDOT
  • Created Date: Sep 9 2014 6:33AM