Brick Masonry with Cement Mortar
Masonry is the building of structures from individual units laid in and bound together by mortar; the term masonry can also refer to the units themselves. The common materials of masonry construction are brick, stone such as marble, granite, travertine, limestone, concrete block, glass block and tile. Masonry is generally a highly durable form of construction. Brick masonry construction involves use of high quality materials in construction. Use of low grade materials in construction or mortar mix in inappropriate ratio can affect the quality of construction.
In our earlier articles, we discussed different types of specifications and purpose of specifications, RCC specifications in detail. We will be discussing specifications for Coursed Rubble Masonry (CRS) and Specifications for Plain Cement Concrete (PCC) in our further articles. In this article, we are going discuss or rather list out all the specifications that are to be given for “Brick Masonry in Cement Mortar”.
Specifications for Brick masonry in Cement Mortar
- The bricks shall be of first class, regular in shape, size and colour.
- The bricks should be free from flaws, cracks and lumps of any kind.
- Shall have minimum crushing strength 10.5N/mm2.
- The bricks shall not absorb the water more than one sixth of the weight of the brick.
- The sand used shall be medium coarse, clean, sharp, free from clay, mica and other organic matter.
- The cement used shall satisfy the requirement of Bureau of Indian Standard.
- The mortar is designated in specified proportion of cement and sand. The materials are weighed or measured and mixed on watertight platform after allowing bulkage of sand.
- Bricks before laying shall be thoroughly soaked in water.
- The bricks laid truly horizontal in course with frogs upwards.
- The brickwork shall be raised 1m in height at a strength all round the building.
- Only fresh mortar within ½ hour for cement mortar, the time of adding water shall be used.
- During rains, no brickwork is carried out when special arrangements are made.
- The brickwork shall be kept wet for atleast 10 days.