what is portland cement ? how is it manufactured ?
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Answer:
- PORTLAND CEMENT
It is a fine powder, produced by heating limestone and clay minerals in a kiln to form clinker, grinding the clinker, and adding 2 to 3 percent of gypsum.
Several types of Portland cement are available. The most common, called ordinary Portland cement (OPC), is grey, but white Portland cement is also available.
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Answer:
The cement which is manufactured from chalk and clay which hardens under water
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