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

This study presents the findings of an extensive investigation to evaluate the precision and reliability of a non-destructive CAPO test in estimating the in situ compressive strength of concrete made from machine-crushed brick aggregates. To estimate the compressive strength of concrete built from brick and stone aggregates for several target strengths at various ages, the CAPO test, core test, and standard cylinder test were used. The results of the core test and cylinder test are correlated with the CAPO pullout force, demonstrating a strong relationship between pullout force and compressive strength. The results suggest that the CAPO test displays estimated strengths ranging from 5–17% of the cylinder strength and 0–6% of the core strength for concrete containing brick chips. The study validates the CAPO test's reliability in conducting in-situ concrete strength assessments.