Coursed Rubble Masonry Coursed Rubble Masonry is the form of masonry which is commonly adopted in the construction of residential buildings public buildings, piers and abutments for ordinary bridges. Considering the dressing and finishing of the stones, it is further sub-divided ...
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Tagged As: masonry, Stone Masonry
Random Rubble Masonry Random Rubble Masonry is slightly superior to uncoursed rubble masonry. In this form the stones used in the work are hammer or chisel-dressed. The stones are not suitably shaped or finished and as such the elevation of this type of stone masonry shows irregu...
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Tagged As: masonry, Stone Masonry
Uncoursed Rubble Masonry Uncoursed Rubble Masonry is the poorest form of stone masonry. The stones to be used for the work are directly obtained from the quarry, after merely knocking off weak corner and edges with the mason’s hammer. The stones are carefully laid so as to brea...
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Tagged As: masonry, Stone Masonry
IRS-T 40 Special Grade Cement The IRS-T 40 Cement is a special type of cement which is mainly used in railway works only. This special cement is manufactured under the specifications that are approved by the ministry of Indian Railways. This cement contains high volume of C3S con...
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Tagged As: IRS-T 40 Cement, Types of Cement
Plaster of Paris Plaster of Paris is calcined gypsum. Mixed with ordinary lime it is used for repairing holes and cracks in wooden or plastered surfaces, and for making moulds and ornamental works. When mixed with water its swells slightly and sets rapidly. Gypsum is natural calc...
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Tagged As: Plaster of Paris, POP
Tests for Strength of Lime Mortars Two bricks are joined flat in a cross fashion one over the other with 12 mm mortar joint. Bricks are thoroughly soaked in water before joining and cured for 7 days after they are jointed. Load required to separate them at joint gives the adhesiv...
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Tagged As: Lime, Lime Mortars
Lime Mortars Lime mortars require grinding to slake the unslaked particles and to make an intimate mixture of the materials. Lime/surkhi mortars are ground in two operations, first only the lime and surkhi are ground together and then sand is added and again ground. For big jobs ...
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Tagged As: Lime, Lime Mortars
Shell Lime Shell lime freshly slaked is used for polished plaster and white washing. It comes under the catagory of ‘fat limes’.
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Tagged As: Lime, Shell Lime
Poor Lime (or) Lean Lime Poor lime also called Meagre or Lean lime, contains from 10 to 40 per cent impurities insoluble in acids such as sand and stones, takes longer to slake, does not increase in bulk, to such an extent (less than twice) as pure lime and has inferior plasticit...
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Tagged As: Lean Lime, Lime, Poor Lime
Burning of Lime Limestone is burnt in clamps or kilns. Fuel used is generally, coal-dust or fire-wood. Cowdung or litter should not be used with kankar. A clamp consists of a heap of limestone and coal stacked in alternate layers and is used for burning only small quantities of l...
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Tagged As: Burning of Lime, Lime
