Improved Specifications and Protocols for Acceptance Tests on Processing Additions in Cement Manufacturing

Processing additions," such as granulated blast furnace slag, limestone, and fly ash, are interground with clinker in the manufacture of some portland cements to improve the efficiency of the manufacturing process. These additions also may improve product quality, reduce carbon dioxide emissions and energy requirements during the cement manufacturing process, and provide other economic and environmental benefits. However, there has been considerable debate recently about the effects of such additions on cement and concrete properties and on the performance and durability of the highway pavements and structures in which these materials are used. In addition, current cement specifications do not address, in a consistent manner, the use of such additions in cement manufacturing. Although a great deal of research has been performed on the effects of portland cement characteristics on concrete properties and durability, only limited research has dealt with the effects of incorporating inorganic processing additions. There are no clear conclusions concerning the effects of using processing additions in the manufacturing process on the performance and durability of highway pavements and structures. Further research is needed to assess these effects, to develop recommendations to help improve cement specifications and test protocols with regard to the use of such processing additions, and to develop guidance on the use of these cements in highway concrete. The objective of this research is to recommend potential improvements to specifications and test protocols to determine the acceptability of cements with processing additions. This research will deal with inorganic processing additions (i.e., it will not deal with organic grinding aids commonly used in cement manufacture).

Language

  • English

Project

  • Status: Completed
  • Funding: $649924.00
  • Contract Numbers:

    Project 18-11

  • Sponsor Organizations:

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590

    American Association of State Highway and Transportation Officials (AASHTO)

    444 North Capitol Street, NW
    Washington, DC  United States  20001

    National Cooperative Highway Research Program

    Transportation Research Board
    500 Fifth Street, NW
    Washington, DC  United States  20001
  • Project Managers:

    Hanna, Amir

  • Performing Organizations:

    Construction Technology Laboratories, Incorporated

    5420 Old Orchard Road
    Skokie, IL  United States  60077-4321
  • Principal Investigators:

    Taylor, Peter

  • Start Date: 20030228
  • Expected Completion Date: 0
  • Actual Completion Date: 20070930
  • Source Data: RiP Project 6519

Subject/Index Terms

Filing Info

  • Accession Number: 01460984
  • Record Type: Research project
  • Source Agency: National Cooperative Highway Research Program
  • Contract Numbers: Project 18-11
  • Files: RiP, USDOT
  • Created Date: Jan 3 2013 1:36PM