Structural Concrete, Vol. 10, no. 4, December 2009
Determination of concrete compressive strength with pullout tests
H. Thun, Luleå University of Technology, Luleå, Sweden
U. Ohlsson, Luleå University of Technology, Luleå, Sweden
L. Elfgren, Luleå University of Technology, Luleå, Sweden
A pullout test using post-installed inserts has been examined as an alternative to drilled cores to determine the in-place concrete compressive strength. Tests have been carried out on eight railway bridges from 1965 to 1980 and on a one year old concrete slab. An empirical strength relationship is proposed between the compressive strength of a drilled core with the diameter and height of 100 mm and the pullout force from the pullout test. It is a power function and the relationship is valid for concrete compressive strengths up to 105 MPa; it gives higher concrete strengths than earlier proposed functions.
