4373 | Astm D

is produced in a sealed container, the resulting pressure increase is directly proportional to the amount of carbonate in the sample. Equipment and Procedure

This test method covers the quantitative determination of the carbonate content (primarily calcium carbonate, CaCO₃) in soils, using a gasometric method. It is suitable for both fine-grained and coarse-grained soils, as well as soft rock and aggregate materials. astm d 4373

[ CaCO_3 + 2HCl \rightarrow CaCl_2 + H_2O + CO_2 \uparrow ] is produced in a sealed container, the resulting

[ \textCarbonate (%) = \frac\textCO_2 \text pressure/volume reading\textDry soil mass \times \textCalibration factor ] is produced in a sealed container

Or directly from a pre-established calibration curve using pure CaCO₃.

D4373 – 14 (or current active version: 2021)