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MIVAN FORMWORK

Presented by, Sagar D Shah

Nirma University

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Overview• Introduction

• Formwork – definition and discussions

• Components and assembly of MIVAN formwork

• Construction with MIVAN

• Work cycle

• Quality enhancements

• Merits and demerits

• Remedies proposed

• Conclusion and Inference

• Bibliography 2

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Introduction• Concept of ALUMINIUM FORMWORK

• Developed by MIVAN GROUPS, MALAYSIA

• Driving force –speed of construction, quality of construction, seismic resistivity, economy

• Good quality construction should not deter the project speed nor should it be uneconomical

“Cost is long forgotten, but the quality is remembered forever”

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Innovation in Construction Technology• Traditional mode of construction - inadequate for mass housing

construction.

• Prone to poor quality control

• Mass housing works – technologies for fast construction to deliver quality, economic and durable structure.

• Pre-cast and cast-in-situ techniques are used for quick construction.

• Use of Aluminum alloy for formwork 4

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What is a Formwork?

• Support for plastic concrete when placed, till it gains half of its design strength .

• Temporary supports and castings

Forms or moulds or shutters are the receptacles in which concrete is placed, so that it will have desired shape or outline when hardened. Once concrete develops the adequate strength to support its own weight they can be taken out. - ACC

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Formwork - Requirements• Sufficiently strong enough

• The joints should be rigid

• Construction lines in the formwork should be true

• Easily removable without damage to itself

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Load Acting On Formwork• Self weight, Wet concrete weight, Live load, Impact of

concrete pour, vibrations.

• Load in bending and shear for frame and joist-370kg/m2.

• Should not deflect more than 0.25 cm.

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MIVAN System• 3S - SYSTEM OF CONSTRUCTION - Speed, Strength, Safety

• Column and beam construction – eliminated

• Walls and slabs are cast in one operation

• Specially designed, easy to handle light weight pre-engineered aluminium forms.

• Rapid construction of multiple units of repetitive type using semi-skilled labours.

• Fitting and erecting the portion of shuttering

• Carrying out concreting of the walls and slabs together.

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MIVAN Formwork• Aluminum alloy panels

• Excellent stiffness-to-weight ratio

• Face or contact surface - 4mm thick plate

• Ribbons 6 mm thick.

• Pin and wedge arrangement system

• Requires no bracing

• High strength wall ties

• Small panels – no heavy equipment

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MIVAN FORMWORK• Heavy lifting eliminated

• Semi skilled labors

• Fast construction suitable for large magnitudes

• Good quality with accurate dimensions

• System components are durable – repetitive

• Monolithic construction

Mivan – 4day cycle

Conventional – 14 to 20 day cycle

• Plastering eliminated completely10

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Comparison – Mivan and Conventional

• More seismic resistance

• Increased durability

• Lesser number of joints – reduced leakages

• Higher carpet area

• Smooth finishing of wall and slab

• Uniform quality of construction

• Negligible maintenance

• Faster completion, conventional stage-to-stage concreting , schedule

for masonry , plastering and finishing.

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Construction with MIVAN• PRE – CONCRETE ACTIVITIES

• Receipt of equipment on site

• Level surveys

• Setting out of formwork

• Control / correction of deviation

• Erect formwork – vertical

• Erect deck formwork

• Setting kickers

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Checks before Concreting• Formwork should be cleaned and coated

• Wall formwork erected to the setting out lines

• Openings are of correct dimensions

• Horizontal formwork are in level

• Deck and beam props are vertical

• Wall ties, pins and wedges are all in position

• Surplus material are cleared

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On Concrete Activities• Checking pins, wedges and wall ties

• Beam / deck props adjacent to drop areas slipping due to

vibration

• Bracing at special areas slipping due to vibration

• Overspill of concrete at window opening

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Post – Concrete Activities• Strike down wall form

• Strike deck form

• Clean, transport and stack formwork

• Strike down kicker formwork

• Strike wall – mounted working platform

• All formwork can be struck after 12 hours

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Software Application For Formwork

• Designed using most optimal panel size , by the use of state-of-art design software.

• Incorporates optimum assembly procedure ,economical panel selection ,hence minimizing capital and operational cost.

• Flexible in design and can take any architectural and structural form such as bay window, staircase etc.

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Beam components

Prop Head

Beam Side Panel

Beam Soffit PanelBeam Soffit Bulkhead

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Deck Components

DeckPanel

Deck Prop

Prop Length

Deck Mid –Beam

Soffit Length

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Other Components

Internal Soffit Corner

External Soffit Corner

External Corner

Internal Corner

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Wall Components

Wall Panel

Rocker

Kicker

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Pin and Wedge System

• Pin

• Stub21

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Formwork Assembly

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Work Cycle• System for scheduling & controlling the work of other connected

construction trades

• Deshuttering of the panels – 12 to 15 hrs

• Positioning brackets & platforms on the level- 10 to 15 hrs

• Deshuttered panels lifted & fixed on floor-7 to 10 hrs

• Kicker & external shutters fixed in 7 hrs

• Shutters are erected in 6-8 hrs

• Reinforcement and – 10 to 12 hrs

• Electrical fittings -10 hrs

• Pouring concrete

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4 Day Cycle

• Day 1: erection of vertical reinforcement bars and one side of the

vertical formwork

• Day 2: erection of the second side of the vertical formwork and

formwork for the slab

• Day 3: fixing reinforcement bars for slabs and casting of walls and

slabs

• Day 4: removal of vertical form work panels after 24hours, props in

place for 7 days, floor slab formwork in place for 2.5 days29

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Design Aspect Of Mivan:

• Conventional RC beam column-In case of lateral load more reinforcement required. Column 20 % strong than beam it support (requirement)

• In RC load bearing wall and slab- structure become monolithic box type –suitable for resisting horizontal load.(shear wall).

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Quality Enhancements• High quality formwork panels - consistency of dimensions

• Level and verticality

• Plastering eliminated

• 3mm to 4mm skin coat enough for pleasant appearance

• 6mm coat for flooring.

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Merits• Total system forms the complete concrete structure• Custom designed to suit project requirements• Unsurpassed construction speed• High quality finish• Cost effective• Panels can be reused up to 250 times• Erected using unskilled labour• Quality and speed - given due consideration along with

economy• Low maintenance due to monolithic structure , hence very

cost effective in long run32

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Limitations• Because of small sizes - finishing lines are seen • Concealed services become difficult• Requires uniform planning and uniform elevations to be cost

effective• Modifications are not possible • Large volume of work is necessary to be cost effective• Spacers, wall ties - seepage, leakages during monsoon• Shrinkage cracks • High heat of hydration – shear walls

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Remedial Measures• Wall ties - create holes in wall after deshuttering

• Box-type construction - shrinkage cracks, near door and window openings in the walls

• Minimize these cracks by providing control strips in the structure which could be concreted after a delay of about 3 to 7 days after major concreting

• The problem of cracking can be avoided by minimizing the heat of hydration by using Flyash

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Conclusion and Inference• Civil engineers not only build but also enhance the quality of life• Creativity and technical skill help to plan, design, construct and

operate the facilities essential to life• MIVAN - cost effective and efficient tool to solve problems of the

mega housing project• MIVAN construction is able to provide high quality construction at

unbelievable speed and at reasonable cost• Effective technology – India

“Cost is long forgotten, but the quality is remembered forever”

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Bibliography

• http://en.wikipedia.org/wiki/Formwork• http://www.reliancescaffolding.com/Wall-Form-works/form-work.a

sp• www.mivan.com• www.mivantelecomms.com/news/?id=42&q

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Thank You