n Journal of the South African Institution of Civil Engineering = Joernaal van die Suid-Afrikaanse Instituut van Siviele Ingenieurswese - Inter-laboratory proficiency evaluations between several Gauteng-based concrete and aggregate testing laboratories : technical paper

Volume 44, Issue 1
  • ISSN : 1021-2019



The South African National Accreditation System requires accredited civil engineering laboratories to participate in inter-laboratory precision evaluations of the tests for which they are accredited. Results are presented for evaluation of a number of common aggregate and concrete tests conducted by seven laboratories which have participated in an evaluation programme for some time. The data were analysed and proposals have been made to assist civil engineering laboratories to assess the precision of their test results.

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