Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Percentage use of characterization tests. Among the methods, the most used are those classified as direct, which measure changes in material properties. The graph in Figure 5 shows that only 5% of the studies did not apply any method, and this was due to the use of materials considered already established as pozzolanic in the literature or that have been previously studied. However, 25% of the cases used direct and indirect tests together.
