17-08-2013, 03:06 PM
MIVAN SYSTEM ADVANTAGES DISADVANTAGES
MIVAN SYSTEM.docx (Size: 12.8 KB / Downloads: 22)
Advantages:
Mivan formwork requires relatively less labour
More seismic resistance
Increased durability
Lesser number of joints and reduced leakages
Higher carpet area
Smooth finishing of wall and slab
Uniform quality of construction
Negligible maintenance
Faster completion
Limitations:
Even though there are so many advantages of Mivan formwork the limitations cannot be ignored. However the limitations do not pose any serious problems. They are as follows: -
Because of few small sizes finishing lines are seen on the concrete surfaces
Services after completing become slightly difficult due to the small width of components
It requires uniform planning as well as uniform elevations to be cost effective
The formwork requires number of spacer, wall ties etc. which are placed @ 2ft c/c; these produce problems such as seepage, leakages during monsoon
Due to box-type construction, contraction cracks are likely to appear
Heat of hydration is high due to shear walls
It is rigid in design once placed, as any alteration becomes tough later
Remedial Measures:
It is possible to minimize contraction cracks by providing control strips in the structure which could be concreted with a delay of about 3-7 days after major concreting. The problem of cracking can be avoided by minimizing the heat of hydration by using flash.