ASTM C267-1982: Standard Test Methods for Chemical Resistance of Mortars, Grouts, and Monolithic Surfacings and Polymer Concretes

ASTM C267-1982 outlines standard test methods to evaluate the chemical resistance of mortars, grouts, monolithic surfacings, and polymer concretes when exposed to various chemical environments. The test procedure generally involves the following steps:

1. Sample Preparation

• Prepare specimens of the test material according to the standard dimensions and curing conditions specified in the standard.
• The samples must be properly cured to ensure they reach the desired mechanical properties before exposure to chemicals.

2. Selection of Chemical Reagents

• The specimens are exposed to a variety of chemical solutions, which may include acids, alkalis, solvents, and other aggressive substances depending on the intended application of the material.

3. Immersion and Exposure

• The test specimens are immersed or partially immersed in the selected chemical reagents.
• The exposure time varies and is determined based on the specific test requirements. Common durations include 7 days, 28 days, or longer.

4. Evaluation Criteria

After the exposure period, the specimens are assessed for changes in:

• Weight Loss or Gain – Determined by weighing the specimens before and after exposure.
• Dimensional Changes – Measured to evaluate expansion, contraction, or surface degradation.
• Surface Condition – Visual inspection for signs of cracking, softening, discoloration, or other surface changes.
• Strength Testing – Mechanical strength tests (compressive, flexural, or tensile strength) may be performed before and after chemical exposure to assess the material's degradation.

5. Data Recording and Reporting

• The test results, including weight changes, visual observations, and mechanical property variations, are recorded and analyzed.
• Results are compared to control samples to determine the level of chemical resistance.

Conclusion

ASTM C267-1982 provides a standardized method to assess the durability of construction materials when exposed to harsh chemical environments. The test helps engineers and material scientists select appropriate materials for applications requiring high chemical resistance.

Would you like further details on specific chemicals or testing conditions, please comment below.