Standard Test Methods for Determining the Chemical Resistance of Concrete Products to Acid Attack

Importancia y uso:

4.1 As described in Guide C1894, the MICC is considered to be a three-stage process with the reduction in pH (Stage I) (for example, 12.5 > pH > 9-10), the establishment of biofilms which further lowers the pH (Stage II) (for example, 9-10 > pH > 4-6) and eventual deterioration due to biogenic acid exposure (Stage III) (for example, < ~4 pH). This document provides standard test methods to assess the effects of acid in Stage 3 for concrete.

4.2 As described in Guide C1894, acid immersion testing should be used with great caution in specifying concrete as this is a final stage of deterioration and the concrete may not be exposed to the conditions of this test.

4.3 The results obtained by these test methods should serve as a guide in, but not as the sole basis for, selection of a chemical-resistant material for a particular application. No attempt has been made to incorporate into this test method all the various factors that may affect the performance of a material when subjected to actual service.

Subcomité:

C13.03

Referida por:

C1894-22, C1904-22

Volúmen:

04.05

Número ICS:

91.100.30 (Concrete and concrete products)

Palabras clave:

acid attack; chemical-resistant; concrete; microbially-induced concrete corrosion (MICC); mortar; portland cement; wastewater;