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Q: You have to construct a building underwater. Identify the kind of lime that should be used in such a scenario.
  • A. Raw Lime
  • B. Hydraulic Lime
  • C. Quick Lime
  • D. Salt Lime
Correct Answer: Option B - Hydraulic lime – It is a product obtained by moderate burning of raw lime stone which contains small proportions of clay 5–30% and iron oxide in chemical. Combination with the calcium content [CaO + MgO] 70–80% with MgO less than 5%. • It has ability to set under water in thick damp condition with no air circulation. • Used in foundation of underwater work.
B. Hydraulic lime – It is a product obtained by moderate burning of raw lime stone which contains small proportions of clay 5–30% and iron oxide in chemical. Combination with the calcium content [CaO + MgO] 70–80% with MgO less than 5%. • It has ability to set under water in thick damp condition with no air circulation. • Used in foundation of underwater work.

Explanations:

Hydraulic lime – It is a product obtained by moderate burning of raw lime stone which contains small proportions of clay 5–30% and iron oxide in chemical. Combination with the calcium content [CaO + MgO] 70–80% with MgO less than 5%. • It has ability to set under water in thick damp condition with no air circulation. • Used in foundation of underwater work.