METHOD FOR FIELD DETERMINATION OF THE CEMENT CONTENT OF CEMENT STABILIZED LAYERS

FAELTMETOD FOER CEMENTHALTERS BESTAEMNING I CEMENTSTABILISERADE LAGER

After a literature survey the ASTM 2901-70 method was selected and its applicability to Swedish conditions was tested. An attempt was made to simplify the method. ASTM 2901-70 (EDTA titration) is based on a chemical analysis of the soil-cement mixture where the calcium content of the mixture is measured and used as a measure of the cement content. The calcium content in Swedish cements amounts to about 60%, varying with the site of manufacture. The EDTA method can be divided into three steps (a) analysis of the road material, i.e. construction of a calibration curve (B) actual testing (C) computation of the result. The accuracy of the method was examined using two known cement contents, 5% and 7%. Then the confidence limits 5,0 plus or minus 0,22 and 7,0 plus or minus 0,23 of duplicate tests were found. An attempt was also made to design a simplified procedure for construction of the calibration curve. The field applicability was tested during the summer of 1975. According to the authors the two methods are fully applicable in field testing. The modified method has a greater applicability due to the simplified, i.e. Less time consuming, method of finding the calibration curve. /TRRL/

  • Corporate Authors:

    Royal Institute of Technology, Sweden

    Valhallavagen 79
    Stockholm,   Sweden  100 44
  • Authors:
    • Jacobsson, L
    • Skoglund, P
  • Publication Date: 1975

Language

  • Swedish

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 48 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00137818
  • Record Type: Publication
  • Source Agency: Swedish National Road and Transport Research Institute (VTI)
  • Report/Paper Numbers: Examensarbete 1975
  • Files: ITRD, TRIS
  • Created Date: Apr 13 1977 12:00AM