What is the correlation between the Available CaO% in Quicklime, CaO and the CaO% Equivalent in Hydrated Lime, Ca(OH)2?
The term Available Lime refers to the percent of CaO in a sample that is available as CaO. Because quicklime is produced from the heating of calcium carbonate that occurs in nature, it will have some impurities that are dictated by the nature of the geological deposit. Also, in the process of producing quicklime there will always be some calcium carbonate core due to having to heat irregularly shaped and varying sized rocks of limestone. In some chemical testing of lime the CaO in the calcium carbonate core is included and is referred to as the Total CaO. This percentage is generally higher than the Available CaO since it includes the CaO that is chemically bonded in the calcium carbonate core. The “Rapid Sugar Test” for available lime, either the ASTM C-25 or AWWA B202 version, is usually the chemical test that is used to determine the available lime in a sample of quicklime or hydrated lime. In a theoretically pure sample of quicklime, devoid of all naturally occurring impurities, an
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- What are the STCC, CAS and EPA reference numbers for quicklime (Calcium Oxide-CaO) and hydrated lime Calcium Hydroxide-Ca(OH) 2)?
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