Introduction to Mivan Formwork Technology
Mivan Formwork is an innovative formwork system designed for the construction industry. It consists of strong and sturdy aluminum components that offer high strength and durability. Mivan formwork is widely used in the construction of residential units and mass housing projects.
Components of Mivan Formwork System
The Mivan formwork system is made up of several components, including panels, beams, supports, and tie-rods. These components are designed to work together to provide a strong and stable structure during concrete pouring and curing.
Installation Procedure of Mivan Formwork
Mivan formwork is simple to install, making it an efficient and cost-effective solution for construction projects. The installation process involves laying the panels, attaching the beams, and installing the supports and tie-rods. The system can be easily adapted to fit the specific needs of each project, making it a flexible solution for various construction requirements.
Key Features of Mivan Formwork
- High strength and durability
- Simple to install
- Adaptable to different project requirements
- Efficient and cost-effective
- Widely used in residential and mass housing projects
Comparison with Other Formwork Systems
Mivan formwork stands out from other formwork systems due to its high strength, durability, and ease of installation. It is also a more cost-effective solution compared to traditional formwork systems that are made from timber or steel.
Advantages of Mivan Formwork
- Saves time and reduces construction costs
- Provides a strong and stable structure during concrete pouring and curing
- Offers flexibility and adaptability to different project requirements
- Easy to install and remove
- Environmentally friendly as it can be reused multiple times
Disadvantages of Mivan Formwork
- Higher initial cost compared to traditional formwork systems
- Limited to only large scale construction projects
- Requires specialized skills and knowledge for installation and maintenance.
Components of Mivan Formwork
The components of Mivan formwork are divided into 4 types based on the location of use –
Wall Panel: The Foundation of Mivan Formwork
The wall panel is the basic and major component of Mivan formwork, forming the face of the wall. The panels are made from an aluminum sheet that is properly cut to fit the exact size of the wall. The wall panels provide the structure and stability needed during concrete pouring and curing.
Rocker: Supporting the Wall Panels
The rocker is an L-shaped panel that plays a critical role in supporting the wall panels. The rocker has allotment holes for the stub pin, ensuring that the wall panels remain in place during concrete pouring and curing.
Kickers: Providing a Stable Base for Wall Panels
The kickers serve as a ledge, providing support for the wall panels by forming a wall face at the top of the panel. The kickers are designed to be strong and durable, ensuring that the wall panels remain stable during concrete pouring and curing.
Stub Pin: The Joining Component for Wall Components
The stub pin is the joining component for all other wall components in Mivan formwork. It is used to connect the wall panels, rocker, and kickers to create a strong and secure structure during concrete pouring and curing. The stub pin is made from high-quality materials and is designed to be strong and durable.
Beam Side Panel: Forming the Sides of the Beams
The beam side panel is a critical component in Mivan formwork, forming the sides of the beams. The panel is a rectangular structure that is cut to the required size of the beam, providing the stability and structure needed during concrete pouring and curing.
Prop Head and Panel for Soffit Beam: Supporting Unsupported Beams
In beams where there is no support from the bottom, prop heads are used to support the beam. The prop head has a V-shaped head for easy dislodging of the formwork. The soffit beam panel is a rectangular aluminum structure that is placed in the prop head to support the soffit beams during concrete pouring and curing. The combination of the prop head and soffit beam panel provide stability and support, ensuring that the beam remains in place during the concrete curing process.
Deck Panels: The Foundation of the Slab
The deck panels in Mivan formwork provide the foundation for the slab. The deck panels are a horizontal flat surface upon which the slab is cast, ensuring that the slab remains level and stable during concrete pouring and curing.
Deck Prop and Prop Length: Supporting the Load of the Deck
The deck prop is used to support the slab and bears the load coming on the deck panel. The prop lengths are the vertical support for the deck prop and are adjustable to match the height of the slab. This combination of the deck prop and prop length provide the stability and support needed during concrete pouring and curing, ensuring that the slab remains in place.
Soffit Length: Supporting the Edges of the Deck Panels
The soffit length provides support to the edge of the deck panels at the perimeter of the room. The soffit length is designed to be strong and durable, ensuring that the deck panels remain stable during concrete pouring and curing. The soffit length also helps to distribute the weight of the slab evenly, ensuring that the slab remains level and stable during the concrete curing process.
Additional Components for a Complete Formwork System
Along with the wall, beam, and deck components, Mivan formwork also includes additional components such as internal and external soffit corners, exterior and interior corners for wall panels. These components are designed to fit seamlessly with the other components, ensuring a complete and integrated formwork system.
Erecting the Mivan Formwork
The Mivan formwork erection process involves several steps to ensure that the formwork is accurately placed, joined together, and dimensionally correct.
Placement of Aluminum Formwork
Mivan formwork is mainly used in the construction of structures made entirely of concrete. The formwork is cleaned and coated with an approved release agent before it is erected. The wall reinforcing steel is placed with the floor slab, and prefabricated room-sized wall panels and floor slab panels are erected.
Checking Plumb, Level, and Dimensions
Before the concrete is poured, the formwork must be checked to ensure that it is plumb, level, and the correct dimensions. The aluminum alloy slabs must be accurately made to the required sizes. Spaces for windows, ducts, doors, and other features such as staircases, façade panels, and chajjas are also integrated into the formwork during this stage.
Joining the Forms with Pin and Wedge System
The forms are then joined together using the pin and wedge system, which can be dismantled quickly after the concrete structure has hardened. This ensures that the formwork remains in place during the concrete curing process, allowing for a strong and stable concrete structure.
Steps in Pouring Concrete with Mivan Formwork
- Preparation for Concrete Pouring Before pouring the concrete, make sure that the Mivan formwork is cleaned and coated with an approved release agent. The wall reinforcing steel should also be in place with the floor slab.
- Monitoring the Concrete Pouring Process It’s important to have at least two operatives present during the concrete pouring process to check the pins, wedges, and wall ties. This is to ensure that the pour is done smoothly without any issues.
- Avoiding Common Issues during Pouring Special attention should be paid to avoid issues such as dislodging of pins/wedges, slipping of props, or overspill of concrete at openings. This will ensure that the cast formwork maintains its shape while the concrete is setting.
Steps in Striking Mivan Formwork
- Striking the Wall Formwork The wall formwork is the first to be struck, typically after 12 hours of concrete pouring.
- Striking the Deck Formwork The deck formwork is struck next, following the wall formwork.
- Cleaning and Transporting the Formwork The removed formwork is cleaned with scrapers and wire brushes immediately after striking. Once cleaned, it is properly transported and stored for future use.
Features of Mivan Formwork
- Load Carrying Capacity of Mivan Formwork
The Mivan formwork has a load-carrying capacity of 7-8 Tonnes per square meter and is lightweight, weighing around 18-20 kg per square meter.
- Striking Time for Mivan Formwork
The striking time for vertical (wall) formwork is 12 hours after pouring concrete, or when the concrete strength reaches 2N/mm2. The striking time for horizontal (deck) formwork is 36 hours after pouring concrete, or when the concrete strength reaches 10N/mm2.
- Durability of Mivan Formwork
The panels of Mivan formwork are made of structural grade aluminum alloy, making them durable and sturdy. Each component can be reused up to 200 times.
- Cycle Time with Mivan Formwork
The Mivan formwork system allows for fast construction and can help to complete projects more quickly. The average time needed to cast a floor using Mivan formwork is 7 days.
Comparison between Mivan Formwork and Conventional Formwork
| Factors | Conventional Formwork | Mivan Formwork |
|---|---|---|
| Quality | Normal | Superior |
| Speed of Construction | The pace of the construction is slow due to step – by – step completion of different stages of activities is required. Erection of formwork, concreting and de-shuttering is a 2 week cycle. | In this system, the walls and floor are casted together in one continuous operation in matter of few hours and in built accelerated curing overnight enable removable and reuse of forms on daily cycle basis. |
| Aesthetics | In the case of RCC structural formwork of column and beams partition brick wall, the columns and beams show unsightly projections in room interiors. | The room- sized wall panels and ceiling elements cast against steel plates having smooth finishes and interiors have neat and clean lines without unsightly projections in room interiors. |
| External Finishes | Cement plastered brickwork, painted with cement based paint. | Textured/ pattered colored concrete fascia can be provided which does not need frequent repainting. |
| Useful Carpet area as % of Plinth area | Efficiency around 83.5% | Efficiency around 87.5% |
| Consumption of raw materials | Cement: Normal Steel: Less |
Cement: More Steel: High |
| Maintenance | High due to repairs in plaster of wall and ceiling, Repainting and leakages due to plumbing installations. | The walls and ceiling being smooth and high quality concrete repairs for plastering and leakage are at all required frequently. |
Advantages of Mivan Formwork
- Consistent Dimensions High-quality formwork ensures consistency of dimensions and an accurate concrete finish.
- Complete Concrete Structures The total Mivan formwork system forms complete concrete structures, custom designed to suit specific project requirements.
- Fast Construction Speed Mivan formwork offers unsurpassed construction speed, with the ability to cast floor in as little as 7 days.
- Reusable Components The panels of Mivan formwork are made of durable, structural grade aluminum alloy and can be reused up to 250 times.
- Ease of Erection Mivan formwork can be erected using unskilled labor, making the construction process more efficient.
Disadvantages of Mivan Formwork
- Concealed Services Challenges
- Requires Uniform Planning
- Limitations in Modification
- Large Volume of Work Needed
- Formwork Components Can Cause Issues
- Shrinkage Cracks and High Heat of Hydration.