What is PD CEN/TR 17172 - Validation testing program (VTP) on chloride penetration and carbonation about?
PD CEN/TR 17172 is the international standard on building materials that focuses on the procedure for the determination of chloride penetration.
The objective of the PD CEN/TR 17172 consists of testing concrete mixes complying with EN 206 for particularly aggressive environments with the test methods being standardized by TC 51/WG 12 on chloride penetration and carbonation in order to verify their robustness and coherence.
Who is PD CEN/TR 17172 - Validation testing program (VTP) on chloride penetration and carbonation for?
PD CEN/TR 17172 on testing concrete mixes is useful for:
- Builders
- Civil engineers
- Manufacturers of concrete and concrete products
Why should you use PD CEN/TR 17172 - Validation testing program (VTP) on chloride penetration and carbonation?
Chlorides in concrete result in the corrosion of reinforcing steel and the penetrability of concrete are related to the pore structure and connectivity in cement paste, which, in turn, is influenced by the water-cement ratio of the concrete.
PD CEN/TR 17172 specifies the composition of concrete mixes and preparation of concretes and specimens for laboratory test,
A list of laboratories participating in the validation testing program (VTP) on chloride penetration and carbonation in the exercise with the test types perform is given in PD CEN/TR 17172.
Test methods and standards used in the VTP are provided in PD CEN/TR 17172.
According to PD CEN/TR 17172, statistical analysis of the parameters to be calculated are the mean value, the repeatability standard deviation and the reproducibility standard deviation.
Accelerated carbonation test, natural carbonation test, chloride diffusion test and regression coefficients of the profile fitting procedure is determined in PD CEN/TR 17172.
Overall, PD CEN/TR 17172 could help you in operating the mechanisms of penetration of chloride in concrete that provides physical and chemical protection to the reinforcing steel in the environments where the chloride sources are external (seawater, de-icing salts, and salt spray) or internal (chlorides from concrete mixing). In this manner, you can evaluate the resistance of a concrete sample to the penetration of chloride ions.
