Concrete Mix Design
                    For ensuring quality of concrete, use  
                  
                  
                  
                    Which of the following is correct?
Proper proportioning of concrete, ensures
1. Water tightness of the structure
2. Desired durability
3.Resistance to water
                  
                  Proper proportioning of concrete, ensures
1. Water tightness of the structure
2. Desired durability
3.Resistance to water
                    The grade of concrete not recommended by I.S. : 456, is
                  
                  
                  
                    The risk of segregation is more for
                  
                  
                  
                    The maximum amount of dust which may be permitted in aggregates is
                  
                  
                  