Lime (calcium oxide) - Indian Laws - General

Lime (calcium oxide) In Encyclopedia Britannica , 15th Edn, Micropaedia, Vol II, p. 451, the following discussion is to be found under the caption calcium oxide Calcium oxide , commonly known as lime or quick lime, the monoxide of calcium derived from calcium carbonate . . . by purging all of its carbon dioxide content . . . It is a white or grayish white solid with specific gravity ranging from 3.25 to 3.38 and a melting point of 2,580OC. It is produced in large quantities by roasting limestone, chalk or oyster shells under controlled conditions. Lime is one of the oldest products of chemical reaction known to man. It has been used extensively as a building material and as a fertilizer . . . In the earlier edition (1972) of Encyclopedia Britannica , Vol. 14, p. 34, the topic is found under the caption lime In common usage the term lime includes the various chemical or physical forms of quick lime, hydrated lime and hydraulic lime . . . Commercially quick lime is commonly produced by burning carefully graded limestone in rotary kilns, similar to those used in Portland cement manufacture, and in large stationary vertical kilns . . . Hydraulic lime is a type of cementitious lime that will set and harden under water in a manner similar to Portland cement. It is obtained by calcining an impure limestone containing large quantities of silica and alumina so that sufficient calcium silicates and aluminates are formed to give the lime its characteristic hydraulic properties. Hydraulic limes are widely used in Europe for mortars in masonry construction; use in the US, however is limited . . . Uses . . . a large new market exists in the use of lime as a soil stabilising agent in the construction of base courses for modern highways, airport runways and building foundations. In McGraw Hill Encyclopedia of Science and Technology , p. 581, Vol. 7, the following discussion is to be found under the heading Lime (industry) . A general term for the various products of calcined limestone, for example, quick lime and hydrated lime. Principal uses of lime are in mortar, stucco and plaster for the building industry. Hydraulic lime is made from a lime stone containing silica and alumina which, when the stone is calcined at temperature just short of fusion form unhydrated calcium aluminium silicates, allowing the material to set under water. N. SOOPPY HAJI VERSUS STATE OF KERALA (AND OTHER CASES) - 2008 (7) TMI 874 - KERALA HIGH COURT