Practical cases in the application of the pullout method (LOK-TEST and CAPO-TEST) for in-place compressive strength

Abstract

The pullout methods LOK- TEST and CAPO-TEST for in-place compressive strength are presented with their theoretical analysis’ background and correlations from 30 major studies, made worldwide, showing robust general correlations between pullout force and strength by cylinders or cubes/ cores. The coefficient of variation of the systems are shown, reported in 1984. Practical cases using the systems are described: Case 1. In-Situ compressive strength testing of quarantined precast concrete tunnel lining segments using CAPO-TEST, UK; Case 2. Strength testing with CAPO-TEST on old bridges for further loading, Poland; Case 3. Safe and early form stripping with LOK-TEST, Canada; Case 4. Curing of the cover layer evaluated by pullout and bulk resistivity, Denmark.

Compressive strength assessment of concrete with brick chips using the CAPO-test

“…The assessment may be performed on a pre-existing structure located in any easily accessible location. The technique involved the execution of several steps 2,5,9,21 , the drilling of a 35 mm core to a depth of 28 mm, the utilization of a pullbolt, and the preparation of planed surfaces. The completion of this task required the involvement of three skilled individuals and a significant amount of time.…”

In-Situ Compressive Strength Assessment using CAPO-Test: A Study on Brick Chips based Concrete

“…The assessment may be performed on a pre-existing structure located in any easily accessible location. The technique involved the execution of several steps 2,5,9,20 , the drilling of a 35mm core to a depth of 28mm, the utilization of a pullbolt, and the preparation of planed surfaces. The completion of this task required the involvement of three skilled individuals and a signi cant amount of time.…”