Table 1 Chinese Building Lime Standard JC/T 481-1992
From: Building limes for cultural heritage conservation in China
Grade | Calcium quicklime | Magnesium quicklime | ||||
|---|---|---|---|---|---|---|
Premium | First-class | Qualified | Premium | First-class | Qualified | |
Content of CaO + MgO,%, no less than | 90 | 85 | 80 | 85 | 80 | 75 |
Content of unslaked residue (5 mm round-hole residue on sieve),%, no more than | 5 | 10 | 15 | 5 | 10 | 15 |
CO2,%, no more than | 5 | 7 | 9 | 6 | 8 | 10 |
Yield of lime hydrate, L/Kg, no less than | 2.8 | 2.3 | 2.0 | 2.8 | 2.3 | 2.0 |