Download Building Materials, Third Edition by S.K. Duggal PDF

By S.K. Duggal

This booklet highlights: mechanical and actual homes of assorted fabrics with emphasis on power and sturdiness; impression of assorted components on those houses; factors of defects, their prevention and treatments; and, trying out approaches of fabrics. This version comprises: fabrics adjustments in chapters facing cement, concrete, lime etc; up-to-date trying out systems; a number of revision of information and substitutions; and, clever and composite fabrics as a separate bankruptcy. The booklet could function a via textual content for undergraduate scholars of civil engineering, structure and building expertise. practicing engineers, architects and contractors may additionally locate it a beneficial reference resource.

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Round ended and bull nosed bricks (Fig. 13 (a, f)) are used to construct open drains. For door and window jambs, cant brick, also called splay brick, shown in Fig. 13 (b, c), are most suitable. The double cant brick shown in Fig. 13 (c) is used for octagonal pillars. Cornice brick shown in Fig. 13 (d) is used from architectural point of view. 13 (e) shows a compass brick—tapering in both directions along its length—used to construct furnaces. Perforated brick (Fig. 13 (g)) is well burned brick, but is not sound proof.

4. g. wash basins, water closets, etc. Drain pipes and fittings. Road paving materials. Flooring tiles and wall tiles in toilets and kitchens. 25 EARTHENWARE These are made by burning the ordinary clay at low temperature and cooling slowly. To check shrinkage, sand and crushed pottery are mixed with clay. This also increases the toughness, hardness and strength of the ware. Characteristics 1. Soft, porous and weak. 2. Glazed earthenware becomes resistant to weathering action. Uses: Earthenware is used for manufacturing drain pipes, lavatory fittings and light weight partition walls.

2. Improves impermeability and durability. 3. Tends to lower the fusion point of the clay, especially if present as ferrous oxide. 4. Gives strength and hardness. 8 HARMFUL SUBSTANCES IN BRICK EARTH Lime: When a desirable amount of lime is present in the clay, it results in good bricks, but if in excess, it changes the colour of the brick from red to yellow. When lime is present in lumps, it absorbs moisture, swells and causes disintegration of the bricks. Therefore, lime should be present in finely divided state and lumps, if any, should be removed in the beginning itself.

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