Use of specified quality of materials is the first requirement in any work.Testing for selection of material to be used is therefore essential.
Bricks
Bricks should have smooth rectangular faces with sharp comer and shall be uniform in colour and gives clear ringing sound when stuck.Bricks may be modular or non-modular but should be of uniform size.For carrying out the tests bricks shall be taken at random according to the size of lot so that they become representative sample.
Bricks and brick tiles shall be classified on the basis of their minimum compressive strength as given below in Table.
Bricks
Bricks should have smooth rectangular faces with sharp comer and shall be uniform in colour and gives clear ringing sound when stuck.Bricks may be modular or non-modular but should be of uniform size.For carrying out the tests bricks shall be taken at random according to the size of lot so that they become representative sample.
Bricks and brick tiles shall be classified on the basis of their minimum compressive strength as given below in Table.
Dimensional tolerance for modular bricks shall usually be within the following limits for 20 bricks
Length 380 cm + 4 cm
Width 180 cm
Height 180 cIn ? 4 cm for 90 mm high bricks
Brick tiles 80 cm + 4 cm + 4 cm for 40 mm high brick tiles
The lot of bricks and brick tiles found satisfactory in respect of visual and dimensional requirements shall next be tested for other properties.Time and quality schedule for conducting tests are given in Table .They are suggestive and can be changed at the discretion of the Engineer in Charge.
Length 380 cm + 4 cm
Width 180 cm
Height 180 cIn ? 4 cm for 90 mm high bricks
Brick tiles 80 cm + 4 cm + 4 cm for 40 mm high brick tiles
The lot of bricks and brick tiles found satisfactory in respect of visual and dimensional requirements shall next be tested for other properties.Time and quality schedule for conducting tests are given in Table .They are suggestive and can be changed at the discretion of the Engineer in Charge.
Stone shall be hard, sound, durable and free from weathering decay and defects like cavities, cracks, flaws, sand holes, injurious veins, patches of loose or soft materials and other similar defects that may adversely affect its strength and appearance.Work Supervision Chefk List
As far as possible stones shall be of uniform colour, quality and texture. &one with round surface shall nqt be used. Percentage of water absorption shall generally not exceed 5% other than specified in Table
As far as possible stones shall be of uniform colour, quality and texture. &one with round surface shall nqt be used. Percentage of water absorption shall generally not exceed 5% other than specified in Table
Tests for compressive strength shall be carried out as laid down in IS: 1121 (Part I)-] 974. Test for water absorption shall be carried out as laid down in IS 1124-1974.
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