For the following questions answer them individually
For the construction of cement concrete floor, the maximum permissible size of aggregates is
For concreting the surface of the runways, roads and pavements, the aggregate impact value shall not exceed by weight
Consider the following statements regarding aggregates:
Statements:
1. Dry aggregates absorb water from the mixing water and thus affect the workability
2. Aggregates containing surface moisture contribute extra
3. The free moisture content in fine aggregate results in reduction of volume
4. The free moisture content in coarse aggregate results in bulking of volume.
Of these statements:
If the permissible compressive and tensile stresses in a single reinforced beam are 50 kg/cm2 and 1400 kg/cm2 respectively and the modular ratio is 18, the percentage are At of the steel required for an economic section, is
