ALUMINIUM FORMWORK (MIVAN) - DETAILED STUDY, CRITERIA,FEATURES,AND COMPONENT PARTS.

ALUMINIUM FORMWORK (MIVAN FORMWORK)

Mivan-aluminium formwork system developed by one of the construction company from Europe

In 1990, the MIVAN Company Ltd from Malaysia started the manufacturing of such formwork systems.

This technology has empowered and motivated the mass construction projects throughout the world.

The approach of Aluminum technology promotes speed, quality, and construction aspects which is required for a successful completion of mass housing project.

FEATURES-ALUMINIUM FORMWORK

Light weight-Aluminium formwork does not depend upon heavy lifting equipment and can be handled by unskilled labours.

Faster construction-In view of the four-day cycle of casting the floor together with all slabs as against 14-to-20-day cycle in the conventional method, completed RCC structure is available for subsequent finish trades much faster, resulting in a saving of 10 to 15 days per floor in the overall completion period

Simplicity-Form’s stairs in place as part of work cycle and no skilled labours required.

Qualitative construction-Construction carried out by this system has exceptionally good quality with accurate dimensions for all openings to receive windows and doors, right angles at meeting points of wall to wall, wall to floor, wall to ceiling, etc., concrete surface finishes are good to receive painting directly without plaster.

High Repetitions-System components are durable and can be used more than 100 times without sacrificing the quality or correctness of dimensions and surface

Monolithic-The concept of monolithic construction technology is adapted. That means the whole structure along with the slab is castes at a single pour. In order to construct a monolithic structure obviously we require formwork of greater strength, which means the conventional formwork, is not suitable for the construction. Hence, we require an Aluminium formwork. Construction-Monolithic construction of load bearing walls and slabs in concrete produces structurally superior quality with very few constructions joined compared to the conventional column and beam slabs construction combined with filter brick work or block work subsequently covered by plaster.

Economical- Though the initial cost is high, but considering the repetitions and simplicity it proves to be economical.

20 to 30 percent cost of formwork can be recovered as scrap value.

FORMWORK COMPONENTS

The basic element of the formwork is the panel, which is an extruded Aluminium rail section, welded to an Aluminium sheet.

This produces a lightweight panel with an excellent stiffness to weight ratio, yielding minimal deflection under concrete loading.

Panels are manufactured in the size and shape to suit the requirements of specific projects.

The panels are made from high strength Aluminium alloy with a 4 mm thick skin plate and 6mm thick ribbing behind to stiffen the panels.

Once they are assembled, they are subjected to a trial erection in order to eliminate any dimensional or on-site problems.

All the formwork components are received at the site whining three months after they are ordered.

Following are the components that are regularly used in the construction

1. WALL COMPONENTS

2. DECK COMPONENTS

3. OTHER COMPONENTS

these are the three main categories of components in aluminum formwork, now lets discuss the detailed sub components which are very important to know as these are the main components forming the complete aluminum formwork system.

1.  WALL COMPONENTS

1.1. Wall Panel - these are the main panels which form the mould for the walls.

1.2. Rocker-It is a supporting component of wall

1.3. Kicker-It forms the wall face at the top of the panels and acts as a ledge to support

 

 

 

 

 

 

 

 

1.4. Stub pin and wedge-It helps in joining two wall panels. It helps in joining two joints 

 

 

 

 

 

 

 

 

2.  DECK COMPONENTS

2.1. Deck Panel: It forms the horizontal surface for casting of slabs.

 

 

 

 

 

 

 

2.2. Deck Prop-Support’s deck

 

 

 

 

 

 

 

 

 

 

2.3. Deck Mid–Beam: It supports the middle portion of the beam

 

 

 

 

 

 

 

 

2.4. Soffit Length: It provides support to the edge of the deck panels at their perimeter of the room

 

 

 

 

 

 

 

 

 

 2.5. Deck Beam Bar -It is the deck for the beam. This component supports the deck and beam.

 

 

 

 

 

 

 

3. OTHER COMPONENTS

3.1. Internal Soffit Corner: - It forms the vertical internal corner between the walls and the beams, slabs, and the horizontal internal cornice between the walls and the beam slabs and the beam soffit

 

 

 

 

 

 

3.2. External Soffit Corner: It forms the external corner between the components.

 

 

 

 

 

 

3.3. External Corner: - It forms the external corner of the formwork system

 

 

 

 

 

 

 

 

 

 

3.4. Internal Corner: It connects two pieces of vertical formwork pieces at their exterior intersections

3.5. Beam bottom slab panel: it forms the beam bottom of the formwork system. 

 

 

 

 

 

3.6. long pin.

 

 

 

 

 

 

3.7. bolts nuts and washers.

 

 

 

 

3.8. tie-rod 

 

 

 

 

CONSTRUCTION ACTIVITIES WITH ALUMINIUM FORM WORK

The construction activities are divided as pre – concrete activities, during concreting and post concrete activities. They are as follows-

1. Pr-construction Activities

2. On-Concrete Activities

3. Post –concrete activities

lets discuss in brief the steps which are involved or one should remember during the execution or adopting such type of form works

1. Pr-construction Activities

1.1. Receipt of Equipment on Site – The equipment’s is received in the site as ordered.

1.2. Level Surveys – Level checking are made to maintain horizontal level check.

1.3. Setting Out – The setting out of the form work is done.

1.4. Control / Correction of Deviation – Deviation or any correction are carried out.

1.5. Erect Form-work – The form work is erected on site.

1.6. Setting Kickers – kickers are provided over the beam.

2. Pre-Pour check

2.1. Check for level of deck panels and beam bottom.

2.2. Check for Alignment of Verticals.

2.3. Check for Verticality of Columns and Walls.

2.4. Check for room dimensions.

2.5. Check for Outer alignment.

2.6. Check for internal sunk alignment.

2.7. Check for Supporting- Props, Pin wedges for deck, beam sides, Internal corners, outer corners, kicker-panels, rockers etc

3.Post –concrete activities

3.1. Strike Wall Form- It is required to strike down the wall form.

3.2. Strike Deck Form- The deck form is then removed.

3.3. Clean, Transport and stack form work

3.4. Strike Kicker Form-work – The kicker is removed.

3.5. Strike wall – Mounted on a Working Platform the wall is fitted on next floor.

3.6. Erect Wall – Mount Working Platform and the wall is erected. Normally all form work can be struck after 12 hours.

ADVANTAGES OF ALUMINUM FORM WORK 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.

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

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

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

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

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

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

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

Simplified foundation design due to consistent load distribution.

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

LIMITATIONS OF ALUMINIUM FORMWORK

Because of small sizes finishing lines are seen on the concrete surfaces.

Concealed services become difficult due to small thickness of components.

It requires uniform planning as well as uniform elevations to be cost effective.

Modifications are not possible as all members are caste in RCC.

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