Apple iPhone X Review By Maawa World


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Properties of Bricks

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MUD MORTAR

Clay lumps are collected and are wetted with water and allowed to mature for 1 or 2 days. It is kneeded well until it attains required consistancy. Sometimes fibrous materials like gobber is added in the mix. It prevents cracks in the plaster. If plaster is to be used for outer walls, it is sprayed or painted with bitumen. It is cheap mortar. Its durability is less. It is normally used for the construction of temporary sheds and cheap houses in rural areas.
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LIME

LIME It is an important binding material used in building construction. Lime has been used as the material of construction from ancient time. When it is mixed with sand it provides lime mortar and when mixed with sand and coarse aggregate, it forms lime concrete. Types of Limes and their Properties The limes are classified as fat lime, hydraulic lime and poor lime: (i) Fat lime: It is composed of 95 percentage of calcium oxide. When water is added, it slakes vigorously and its volume increases to 2 to 2 1/2 times. It is white in colour. Its properties are: (a) hardens slowly (b) has high degree of plasticity (c) sets slowly in the presence of air (d) white in colour (e) slakes vigorously. (ii) Hydraulic lime: It contains clay and ferrous oxide. Depending upon the percentage of clay present, the hydraulic lime is divided into the following three types: (a) Feebly hydraulic lime (5 to 10% clay content) (b) Moderately hydraulic lime (11 to 20% clay content) (c) Emin...
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