Details of Aluminum Formwork (Mivan / MFE)
The most effective means available for the construction of high, medium and low rise mass housing R/C structures.
It is a precision-engineered formwork fabricated in Aluminium.
Monolithic pouring. Walls, columns, slabs & beam are poured together.
Speed - Induces a disciplined & systemized approach to construction, which creates a daily work cycle, the essence of the productivity. The productivity generates a overall work cycle, that can achieve 4/5 day per floor outputs or other cycle times to suit your project requirements.
It is flexible in design and can form any architectural or structural configuration, such as stairs, bay windows, curved features, etc.
Quality - When struck the aluminium formwork reveals a good quality fair face onto which a 4–5mm skim coat can be applied for a perfect finish eliminating need of plaster.
Provides an Integrated Scaffolding reducing the cost of your scaffolding requirements.
Ease of handling - The formwork panels are manually handled, generating further savings on heavy equipment and cranage.
Mechanical and electrical installation is simplified where conducts are embedded in the structure and by precise engineering of outlets and service ducts.
Range is 155 US$ per m2 to 225 US$ per m2, most common being 160 US$ per m2 & assumed for cost comparison purpose.
Cost of Aluminum Formwork is 160 US $ per sqm.
Consider 65.00 Rs/US$. Add 25.0 % duties (+ Octroi/Entry Tax/Local Body Tax)
So Total Cost will be app 13,000 Rs/sqm. (160 X 65 X 1.25)
Your project offers 100 uses (for 10 blocks of 10 storey)
Final cost per sqm on item rate basis will be 130 Rs per sqm. ( Rs 13000 Formwork Cost/100 Uses) Depending on quality, traditional formwork (Plywood & Batten) costs between 80 & 150 Rs/sqm
To Workout Built up Area cost :-
For Col-beam-slab structure with simple elevation:
Ratio of Formwork Area to Builtup Area, on thumbrule base will be approximately 3 (It may be as high as 4.5 if elevation is features has double wall, double chhajja etc)
So Cost of Mivan Formwork per sft of builtup Area will be (3 X 13000/10.76) =3625 (One time Cost)
For 100 uses it will be 3625/ 100 = 36.25 Rs/sft of builtup area.
For Wall-slab structure with simple elevation:
Ratio of Formwork Area to Builtup Area, on thumbrule base will be approximately 5.5 (It may be as high as 7 if elevation is features has double wall, double chhajja, etc. Or low cost project where room dimensions are very small)
So Cost of Mivan Formwork per sft of builtup Area will be (5.5 X 13000/10.76) =6645 (One time Cost)
For 100 uses it will be 6645/ 100 = 66.45 Rs/sft of builtup area.
Construction period in above example:
1st Tower 1st slab – 21 days
2nd slab – 18 days
3rd slab – 15 days
4th slab – 12 days
5th slab – 9 days
6th to 25th slab – 140 days (@ 7 days per floor)
Total – 205 days = 7.88 months considering 26 working days per month.
Next each tower (25 slabs) – 175 days = 6.73 months considering 26 working days per month.
Total Period – 7.88 months for 1st tower + 3 X 6.73 months for subsequent towers
= 28.07 months, say 28 months.
Add about 4 months as time to reach typical floor of 1st tower & 6 months for finishing after last floor of 4th tower.
Total construction period will be about 38 months.
Conventionally, for 25 storey building, RCC will take about 2 years for including foundation & 12 months for finishing. That is 36 months. This means even after constructing one block at a time, total construction period is almost same as constructing all 4 towers simultaneously with traditional formwork.