Investigation of the possibility of estimating concrete strength by porosity measurements (EN)

Kolias, S (EN)

The possibility of estimating concrete or mortar strength by measuring the total water porosity by a very simple method is investigated. Cube strengths of mortar and concrete specimens are correlated with water porosity measured from 'intact' pieces taken from the failure cones of the crushed cubes. It is shown that it is not possible to acquire a satisfactory correlation of strength and the measured total water porosity of the mortar or concrete mix. However, a very promising correlation (correlation coefficient R>93%) is obtained if the 'calculated average paste porosity' Pp is substituted for the measured total water porosity of the mix Pm . Pp can be determined from the measured porosity Pm of the mix, the porosity of the aggregates and the volumetric proportions of the constituents. For the range of strengths investigated, it can be inferred that the strength class of a cement (OPC 35 or OPC 45) does not significantly influence the correlation, but a slightly different correlation seems to exist for pozzolanic cements. © 1994 RILEM. (EN)

journalArticle (EN)

Concrete aggregates (EN)

Mortar (EN)

Materials Science, Multidisciplinary (EN)

Calculated average paste porosity (EN)

Correlation methods (EN)

Construction & Building Technology (EN)

Engineering, Civil (EN)

Correlation Coefficient (EN)

Cement (EN)

Concrete testing (EN)

Cube strength (EN)

Cements (EN)

Mechanical variables measurement (EN)

Porosity (EN)

Total water porosity measurement (EN)

Lab Tests (EN)

Strength (EN)

Strength of materials (EN)

National Technical University of Athens

Digital Library of National Technical University of Athens | Dspace@NTUA

Κεντρική Βιβλιοθήκη Ε.Μ.Π.

Ιδρυματικό Αποθετήριο

Δημοσιεύσεις μελών Δ.Ε.Π. σε περιοδικά

Materials and Structures (EN)

English

1994 (EN)

http://hdl.handle.net/123456789/11253

0025-5432 (EN)

265 (EN)

27 (EN)

5 (EN)

10.1007/BF02473043 (EN)

ISI:A1994NU03000003 (EN)

272 (EN)

Kluwer Academic Publishers (EN)