Building Materials, Third Edition by S.K. Duggal

By S.K. Duggal

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

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Of defectives 5 10 15 0 0 1 10 20 30 0 1 2 Note: In case the lot contains 2000 or less bricks, the sampling shall be subject to agreement between the purchaser and supplier. 3) are taken and are laid flat as shown in Fig. 14. The cumulative dimensions of the bricks should be as discussed in Sec. 5. 5) on the sizes of bricks are fixed by giving maximum and minimum dimensions, not on individual bricks but on batches of 20 bricks chosen at random. It follows from this method of measurement that batches are likely to contain, bricks outside the prescribed limit of tolerance.

19 CLAY TILES Tiles are thin slabs of low melting clays used for various purposes in engineering constructions. These give a very pleasing appearance and good service properties. Roofing tiles, flooring tiles, wall tiles and partition tiles are some of the examples. Due to the considerable mass, labourconsuming manufacture, erection and drainage problems, and appreciable transportation charges, roofing tiles have lost their importance and are recommended locally. The various types of roofing tiles in common use are shown in Fig.

17 (a)), the triangle formed in elevation by producing the inner faces of the tile should have a base of 265 mm and height of 100 mm with a tolerance of ± 5 mm. The tiles shold be not less than 100 mm thick throughout. The ceiling tiles may be of single lug or double lug type as shown in Fig. 17(b). Flooring Tiles The flooring tiles are of three classes–class 1, class 2 and class 3. These are available in following sizes. 150 × 150 × 15mm, 150 × 150 × 20mm, 200 × 200 × 20mm 200 × 200 × 25mm, 250 × 250 × 30mm The average dimensions should not vary by more than ± 5 mm and that for a given area and space the dimensions of individual tile should not vary by more than ± 2 %.

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