For soils & soft rock to ASTM D4373

• This test method covers the determination of carbonate (CaCO3) content of soils and soft rock which can be readily broken down by mechanical effort.
• It is a gasometrical method that utilises a simple portable apparatus.
• The test method is quickly performed for soils containing calcium carbonate.
• The calcium carbonate content of soil is determined by treating a 1-g dried soil specimen with hydrochloric acid (HCl) in an enclosed reactor vessel.
• Carbon dioxide gas is evolved during the reaction between the acid and carbonate fraction of the specimen.
• This pressure is measured with a bourdon tube pressure gauge that is pre-calibrated with reagent grade calcium carbonate.
• This test method is used to determine the presence and quantity of calcium carbonate on a marine soil specimen.
• Calcium carbonates k known cementing agents, are water soluble at PH<7, and are soft on the Mohs’ scale compared to other soil minerals.
• The acrylic chamber is 63.5mm internal diameter x 139.7mm long and sealed with anodised end caps. The unit comes complete with 10psi test gauge, bleed valve and a 20ml cup with handle.
• Please refer to ASTM D-4373 for complete instructions on how to prepare and perform the test for determining the carbonate content of soils and soft rock.
• The device is made from Stainless Steel with an acrylic chamber.
• The pressure gauge can be damaged if the solution is allowed to flow into the gauge opening.
• Keep in mind that when tilting to spill the acid, that care must be taken to prevent this acid from reaching into the pressure gauge opening.
• Clean the device thoroughly after use.

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