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Comparison - Aluminum Formwork VS Conventional Formwork

 

 

Advantages of aluminium formwork over conventional construction

 

  1. More seismic resistance: - The box type construction provides more seismic resistance to the structure.

  2. Increased durability: - The durability of a complete concrete structure is more than conventional brick bat masonry.

  3.  Lesser number of joints thereby reducing the leakages and enhancing the durability.

  4. Higher carpet area- Due to shear walls the walls are thin thus increasing area.

  5. Integral and smooth finishing of wall and slab- Smooth finish of aluminium can be seen vividly on walls.

  6. Uniform quality of construction – Uniform grade of concrete is used.

  7. Negligible maintenance – Strong built up of concrete needs no maintenance.

  8. Faster completion – Unsurpassed construction speed can be achieved due to light    weight of forms

  9. Lesser manual labour- Less labour  is required for carrying formworks.

  10. Simplified foundation design due to consistent load distribution.

  11. The natural density of concrete wall result in better sound transmission coefficient.

Table 2.1

RELATIVE COMPARISON OF IN – SITU “ALUMINIUM FORM” SYSTEM WITH

CONVENTIONAL CONSTRUCTION

Sr. No

FACTOR

CONVENTIONAL

IN – SITU ALUMINIUM FORM SYSTEM

REMARKS

1

Quality

Normal

Superior.                                     In – Situ casting of whole structure and transverse walls done in a continuous operation, using controlled concrete mixers obtained from central batching, mixing plants and mechanically placed through concrete buckets using crane and compacted in leak proof moulds using high frequency vibrators   

Superior quality in “System housing”

2

Speed of construction.

The pace of construction is slow due to step – by – step completion of different stages of activity the masonry is required to be laid brick by brick. Erection of formwork, concreting and deshuttering forms is a two – week cycle. The plastering and other finishing activities can commence only thereafter.

In this system, the walls and floors are cast together in one continuous operation in matter of few hours and in built accelerated curing overnight enable removal and re-use of forms on daily cycle basis.

System construction

is

much faster.

3

Aesthetics.

In the case of RCC structural framework of column and beams with partition brick walls is used for construction, the columns and beams show unsightly projections in room interiors.

The Room – Sized wall panels and the ceiling elements cast against steel plates have smooth finishing and the interiors have neat and clean lines without unsightly projections in various corners. The walls and ceilings also have smooth even surfaces, which only need colour/white wash

 

4

External finishes.

Cement plastered brickwork, painted with cement – based paint. Finishing needs painting every in three years.

Textured / pattern coloured concrete facia can be provided. This will need no frequent repainting.

Permanent facia finishes feasible with minor extra initial cost

 5

Useful carpet area as % of plinth area.

Efficiency around 83.5%

Efficiency around 87.5%

More efficient utilization of land for useful living space.

6

Consumption of basic raw materials

 

 

Cement.

 

 

 

 

 

 

 

 

Reinforcing Steel

 

 

 

 

Normal

 

 

 

 

 

 

 

 

Reinforcing steel required is less as compared to the in situ construction as RCC framework uses brick wall as alternative

 

 

 

 

 

Consumption somewhat more than that used in conventional structures.

 

 

 

 

 

 

It may, however will be slightly more than corresponding load – bearing brick wall construction for which, requirements of IS 456 have to be followed for system housing.

 

 

 

 

Although greater consumption strength and durability is also more

 

 

 

Steel requirement is more, as it is required for the shear wall construction. But shear wall construction increases safety against earthquake.

7

Maintenance

In maintenance cost, the major expenditure is involved due to :                    

·   Repairs and maintenance of plaster of walls / ceiling etc.

·   Painting of outer and inner walls.

Leakages due to plumbing and sanitation installation.

The walls and ceiling being smooth and high quality concrete repairs for plastering and leakage’s are not at all required frequently.

It can be concluded that maintenance cost is negligible.

 

 

 

Comparison between Aluminium Formwork and Conventional Formwork

 

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