Quality Assurance Handbook for Rural Roads Volume-I - pmgsy

3. Section-600
(v) Storage of material
Store cement bags on wooden platforms minimum 200 mm above the floor level and
minimum 600 mm above ground level whichever is higher in perfectly dry and water tight
sheds. Stack and store different types of cement separately, in a manner to facilitate their
removal and use in an ordinary manner.
Store lime in weather proof sheds. Store hydrated lime in the same manner as cement and
the period of storage shall not be more than one month
Store bricks in regular tiers as they are unloaded to minimize breakage and defacement.
Stock bricks for use in different situations or different types separately.
Store sand, stone dust, marble dust etc. at proper place so as to prevent contamination of
foreign material due to wind etc. When stacked on ground, do not remove them from stock
pile within 300 mm of the ground.
2 Workmanship and Tolerances
Permissible values of workmanship and tolerances for bricks and brick
masonary are given in Table 600.5
TABLE 600.4: PHYSICAL REQUIREMENTS
Item Requirements
Burnt Clay bricks IS:1077
Clay Flyash bricks IS:13757
Fly ash Grade 1 or 2 of IS:3812
Minimum Compressive Strength Value specified in drawing or 7 MPa whichever is higher
Water absorption Upto 20% by weight (IS:3495 Part 2)
Efflorescence ‘Moderate’ upto 50% of exposed area of brick covered ith a thin
deposit of salt but unaccompanied by powdering or flaking of
Surface (IS:3495 Part 3)
Preferred size 190 x 90 x 90 mm or
230 x 110 x 70 mm
Table 600.5: WORKMANSHIP AND TOLERANCES
Item Permissible Value
Dimensions of Bricks + 5 per cent in size
Compressive Strength of Bricks + 2.5 MPa (No negative tolerance) on value specified or
7 MPa whichever is higher
Thickness of joints for general brick work Not more than 10 mm
Thickness of joints for Arches 5 mm to 15 mm
Plaster furnish Surface thickness, not less than specified thickness by
more than 3 mm.
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