• Important Chart on Concrete factors like WORKABILITY, SLUMP & COMPACTING.

    by  • March 26, 2014 • concrete • 0 Comments

    CONCRETE FACTORS :

    WORKABILITY, SLUMP & COMPACTING.

    concrete workability measuresWorkability, slump and compacting factor of concretes with 20mm or 40mm maximum size of aggregate.

    Table below shows degree of workability, slump, compacting factor of concrete and suitable uses of that.

    Degree of workability

    Slump (mm)

    Compacting factor

    Use for which concrete is suitable

    Small apparatus

    Large apparatus

    Very low

    0.78

    0.80

    Roads vibrated by power-operated machines. At the more workable end of this group, concrete may be compacted in certain cases with hand-operated machines.

    Low

    25 – 75

    0.85

    0.87

    Roads vibrated by hand-operated machines. At the more workable end of this group, concrete may be manually compacted in roads using aggregate of rounded or irregular shape. Mass concrete foundations without vibration or lightly reinforced sections with vibration.

    Medium

    50-100

    0.92

    0.935

    At the less workable end of this group, manually compacted flat slabs using crushed aggregates. Normal reinforced concrete manually compacted and heavily reinforced sections with vibration.

    High

    100-150

    0.95

    0.96

    For sections with congested reinforcement. Not normally suitable for vibration, for pumping and tremle placing.

    Very high

    Flow table test is more suitable.