| SUBJECT |
LAP SPLICING |
MECHANICAL SPLICING |
Development
|
Traditional method of connecting the steel reinforcing bars |
Modern technique of connecting the steel reinforcing bars |
Process
|
Lap splicing requires the overlapping of two parallel bars and hence does not behave in the manner of continuous lengths of reinforcing steel bars
|
Mechanical butt splices are mechanical connections between two pieces of reinforcing steel that enable the bars to behave in a manner similar to continuous lengths of reinforcing steel bars.
|
Cyclic Loading
|
Not considered reliable in conditions of cyclic loading
|
Very reliable in conditions of cyclic loading
|
Dependence on Concrete
|
Requires Concrete to take the tension and load
|
Do not depend on concrete for load transfer
|
Rebar Consumption
|
Rebar consumption is very high and with every higher diameter the rebar consumption increases
|
Mechanical splices join rebar end-to-end, so no extra rebar consumption |
Rebar Limitation
|
Only a limited number or rebars can be joined in one section
|
No such limitation
|
Congestion
|
Overlapping increases the bar congestion and restrict the flow
|
Minimizes Bar Congestion
|
Cyclic performance
|
Poor Cyclic performance
|
Superior cyclic performance
|
| Effect of Concrete deterioration |
Concrete deterioration will inevitably lead to splice failure |
Mechanical splices join rebar end-to-end, providing many of the advantages of a continuous piece of rebar. Therefore Concrete deterioration has no effect on its strength
|
Hidden Costs
|
Many Hidden Costs
|
No Hidden Cost
|
Steel to Concrete Ratio
|
Doubles the Steel to Concrete Ratio
|
Improve steel-to-concrete ratios
|
Column Dimension
|
Requires the use of larger column dimension to accommodate a greater quantity of bars
|
Allows the option of using larger diameter rebar in a smaller column
|
Floor Area
|
Larger column size reduces the floor area
|
Maximizes the floor area by reducing column size
|
Cost Factor
|
Highly expensive
|
Highly Cost Effective and Economical
|
