Weight for Materials | ||
Material | lb/cft | kg/cu.m. |
Aluvial ground-undistributed | 100 | 1600 |
Asbestos, felt | 9 | 150 |
Asphalt flooring | 137 | 2200 |
Ballast stone | 100 - 120 | 1600 - 1970 |
Bamboo | 23 | 370 |
Bitumen | 65 | 1040 |
Brass | 534 | 8550 |
Bricks : Common Burnt Clay | 100 - 120 | 1600 - 1920 |
Sand Cement | 115 | 1840 |
Sand Lime | 130 | 2080 |
Brick Ballast | 75 | 1200 |
Brick dust (surki) | 63 | 1010 |
Brick masonry | 120 | 1920 |
Cement : Ordinary and Aluminous | 90 | 1440 |
Rapid Hardening | 80 | 1280 |
Cement Concrete plain : Aerated | 16 | 260 |
Brick Aggregate | 115 | 1840 |
Stone Ballast | 140 | 2240 |
Cement Concrete-reinforced with 1% steel | 148 | 2370 |
with 2% steel | 150 | 2420 |
with 3% steel | 160 | 2580 |
Chalk | 100 - 120 | 1600 - 1920 |
Clay : Dry compact | 90 | 1440 |
Damp, compact | 110 | 1760 |
Weight for Materials | ||
Material | lb/cft | kg/cu.m. |
wet, compact | 130 | 2080 |
Coal | 55 - 70 | 880 - 1120 |
Concrete with brick aggregate and lime mortar | 120 | 1920 |
Cuddapash Slabs | 170 | 2720 |
Earth : Dry, loose | 80 | 1280 |
Dry, compact | 97 | 1550 |
Moist, loose | 90 - 100 | 1440 - 1600 |
Diy, compact | 100 - 115 | 1760 - 1840 |
Glass : Crown | 157 | 2510 |
Common | 158 | 2530 |
Fint | 191 | 3060 |
Plass glass | 172 | 2750 |
Gravel | 100 - 125 | 1600 - 2000 |
Gunmetal | 548 | 8780 |
Iron; Pig | 450 | 7200 |
Greycast | 445 | 7130 |
white-cast | 473 - 481 | 7580 - 7720 |
Wrought | 480 | 7700 |
Kerosene | 51 | 820 |
Lime freshly burnt | 60 | 960 |
Limestone-crushed | 80 - 90 | 1280 - 1440 |
Lime-slaked | 40 | 640 |
Mortar : Cement | 130 | 2080 |
Lime | 110 | 1760 |
The Fineness Modules of an aggregate is obtained by adding the Percentages by weight of material retained on a range of nine selected sieves and dividing the result by 100, as illsutrated in the Table below.
Serial No. | Sieve | Total percentage retained by weight | ||
B.S. Sieve No. | Tyler. Sieve No. | Sand | Coarse Aggregate | |
1 | 100 | 100 | 100 | 100 |
2 | 52 | 48 | 80 | 100 |
3 | 25 | 28 | 60 | 100 |
4 | 14 | 14 | 40 | 100 |
5 | 7 | 8 | 20 | 100 |
6 | 3/16" | 4 | 0 | 100 |
7 | 3/8" | 3/8" | 0 | 80 |
8 | 3/4" | 3/4" | 0 | 50 |
9 | 11/2" | 11/2" | 0 | 0 |
Fineness Modulus = Sum of percentages / 100 | 300 / 100 = 3.0 | 730 / 100 = 7.3 | ||
are for fine Aggregate |
The Fineness Modules of an aggregate is obtained by adding the Percentages by weight of material retained on a range of nine selected sieves and dividing the result by 100, as illsutrated in the Table below.
Type of work | Concrete Mix Ratio | Max. size of aggregates (mm) | Water for dry aggregates (liter)* | Water for aggregates condition from dry to moist batch (liter)* | Water for best consistency (liter)* |
Small precast work, fence posts, poles, garden furniture and other work of very thin sections | 1:2:2 | 16 | 20 | 15 to 16 | Soft |
Storage tanks, cisterns, sewers, well knerbs, watertight work, and columns or other structural parts subjected to high stresses | 1:2:3 | 20 | 25 | 19 to 22 | Medium |
Reinforced concrete work, floor slab, beams, columns, arches, stairs etc | 1:2.5:3.5 | 20 | 32 | 23 to 27 | Medium or soft |
Ordinary floors, footpaths, drive ways, steps, roads, pavements | 1:2.5:3.5 | 20 | 23 | 20 to 23 | Stiff |
Building and basement walls, silos, sills, lintels, machine foundations subject to vibration, bridges, dams, piers, etc exposed to action of water and frost foundation concrete for masonry walls | 1:2:4 | 40 | 30 | 23 to 26 | Stiff or Medium |
Culverts, retaining walls, compound walls, ordinary machine bases, etc. | 1:3:5 | 40 | 34 | 26 to 30 | Stiff or Medium |
Mass concrete for heavy walls, lean concrete for levelling course of RCC foundations | 1:3:6 | 63 | 36 | 30 to 32 | Medium |
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