Comparison of In-Situ Strengths and Quality Tests <of Concrete)

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TypeTechnical Report
Series titleTechnical translation (National Research Council of Canada); no. TT-1857
Physical description15 p.
Subjectfield tests; strength after 28 days (concrete); concrete (materials); concrete (techniques); Concrete; essai en place; resistance a 28 jours (beton); beton ( materiau); beton (technique)
AbstractInvestigations were carried out on structures and components at more than 20 construction sites and storage yards of precasting factories meeting normal standard requirements with regard to accuracy in production and placement of concrete. It resulted therefrom that in most of the structures investigated the structural strengths after 28 days attained on an average the theoretical concrete quality; fractile values were below by about 20 to 30%. It has been explained that the specification required in DIN 1045 E with regard to structural strengths can, with some accuracy, be maintained without any difficulty, but that it should suitably be completed by stating a fractile. On the basis of the test results it was recommended to modify the specified strength of higher concrete qualities stated in DIN 1045 E as a constant value beta [R] = 0.7 . beta W[28].
Publication date
PublisherNational Research Council Canada
AffiliationNational Research Council Canada
Peer reviewedNo
NRC numberNRC-IRC-405
NPARC number20358593
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Record identifiere58b4014-8b39-42af-948b-c9065af887f7
Record created2012-07-20
Record modified2017-06-29
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