what is limestone used for?
In addition, limestone is used as an additive to paint and other products, and a source of calcium carbonate which is used in a great deal of products including antacids.Cooked limestone is used to make Portland cement, the key ingredient in mortars, cements, and concrete.andstone is used as a building stone and it is used as an indicator of erosional and depositional processes by geologists. And, limestone are used as a soil conditioner, in t â¦ he manufacture of glass, in agriculture and even in jewellery.