Civil site engineers should know the following tips and tricks. Either memorize them or have a list readily available.
Minimum thickness of slab is 125mm.
Absorption of water should not be over 15 percent.
Lapping is unaccepted for the bars that have a diameter of more than 36mm.
Longitudinal reinforcement should be not under 0.8% or in excess of 6% of gross C/S.
For square column, minimum bars is 4 No’s and 6 No’s for circular column.
Lap slices are not recommended for a bar that is larger than 36mm.
PH value of the water should not be under 6.
Dimension tolerance for cubes should be + 2mm.
Densities of Different Types of Construction Materials
Steel = 7850 kg/Cum
Cement = 1440 kg/Cum
Brick = 1682 kg/Cum or 1920 kg/cum
Sand = 1100 to 1600 kg/cum
Water = 1000 kg/cum
R.C.C = 2500 kg/cum (5% of steel)
P.C.C = 2400 kg/cum
Wood = 1100 kg/cum
Crushed Brick = 950-1250 kg/cum
-Concrete Test: Slump test, compression test, split tensile test, soundness etc.
-Soil Test: Core cutter test, compaction test, sand replacement test, triaxial test, consolidation test etc.
-Bitumen Test: Ductility test, softening point test, gravity test, penetration test etc.