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Why 2 of gypsum is added to cement?
Gypsum is added to cement to decrease the setting time.
Types of minerals?
There are two basic types of mineral. 1. Macro -- It is the amount mineral needed by the body which is larger than 100 milligrams. Examples: Calcium, phosphorus and magnesium 2. Trace-- It is the amount needed by the body in small amounts Example: Iron 3.Gypsum--a common white or colorless mineral (hydrated calcium sulphate) used to make cements and plasters (especially plaster of Paris) Gypsum is a very soft mineral composed of calcium sulfate dihydrate, with the chemical formula CaSO4·2H2O. A common mineral of evaporates in inland salt playas. Calcium sulphate the raw material (minerals alabaster, satin spar, selenite) used for gypsum plasters, wallboard/drywall; gypsum plaster, unlike cement, expands on setting, does not crack unless there are faults in the backing; must never be mixed with Portland cement.
What is heatrans catch rate?
2 percent
What market shares of Quaker oats in India?
2 percent
What percent of people have acrophobia?
Between 2 and 5 percent of the general population suffer from acrophobia, with twice as many women affected than men.
