Question

ratio may be increased to 0 45 lor normal ween TABLE V- 3- VOLUME OF COARSE AGGREGATE PER UNIT OF VOLUME OF CONCRETE Maximum size of aggregate in Volume of dry rodded coarse aggregate Per unit volume of concrete for different fineness moduli of sand 2.40 0.50 0.59 0.66 0.71 0.75 0.78 0.82 0.87 2.60 0.48 0.57 0.64 0.69 0.73 0.76 0.80 0.85 2.80 0.46 0.55 0.62 0.67 0.71 0.74 0.78 0.83 3.00 0.44 0.53 0.60 0.65 0.69 0.72 0.76 0.81 Recommended Slumps for Various Types of Construcctions Slump [in] Max Min Concrete Construction Reinforced concrete walls and footings Plain footings, caissons, and substructure walls Beams and reinforced walls Building columns Pavemen and slabs Mass concrete 4 4 2

Answer 1

The above table is about the volume of coarse aggregate required per unit of volume of concrete.

For example. If we want fineness modulus 2.8 and use 1 inch of aggregate size in the mix then we will require

volume of coarse aggregate equals to 0.67 times the volume of concrete.