Shuttering materials

Shuttering materials are important in civil engineering

1. WEL - COME

2. Latthe Education Society’s Polytechnic Civil Department

3. This is to certify that 181149 : Shubham Sagar Shirgave . 181155 : Swapnil Yamagar . of the Second semister of diploma in civil Engineering of L.E.S.Polytechnic,Sangli (0043) has completed the micro project satisfactorily in subject Civil Workshop (22208) for the academic year 2018-19 as prescribed in the curriculum.

4. Title Collect the information of shuttering materials & their specification

5. Acknowledgement A sense of triumph is very much justified at the stage of completion of our project. It is pleasure to utilise this opportunity of acknoweledgement to all those people who have helped me to complete our project. It is with pleasure of immense gratitude that we express our most cordial & humble thanks to our research guide Mr. Waghmode Sir for this valuable guidence , keep intrest , perinnial inspiration & everlasting encouragement. we have great pleasure to express our deep sense of indebtedness & heart full of gratitude to Mr.R.A.Charate Sir, principal of L.E.S.plytechnic college, Kupwad . We are highly grateful to , Mr. Waghmode Sir, for giving their valuable time to guide us. We are thankful to all who helped me during the project work. Place : Kupwad Name : Date : Class :

6. Shuttering materials & their specifications…

7. Introduction Formwork is the term given to either temporary or permanent molds into which concrete or similar materials are poured. In the context of concrete construction, the falsework supports the shuttering moulds . The construction of formwork takes time and involves expenditure upto 20 to 25% of the cost of the structure or even more. Design of these temporary structures are made to economic expenditure. The operation of removing the formwork is known as stripping. Stripped formwork can be reused. Reusable forms are known as panel forms and non-usable are called stationary forms . Materials used for the construction of concrete formwork range from traditional materials such as Timber, steel, aluminum, and plywood to nontraditional materials such as fiberglass. The systems used can be a combination of two materials. Wood products are the most widely used material for formwork. The objective of this section is to introduce Timber as an important material for formwork.

8. Timber : Commonly used by the construction industry in the formation of shuttering for casting concrete on site. Often used with plywood and OSB board. The timber used for this type of work is usually lower grade carcasing timber with a planed sawn edge (PSE ). Timber used for shuttering for exposed concrete work should have smooth and even surface on all faces which come in contact with concrete. Normal sizes of members for timber formwork:

9. Size Thickness

10. Bamboo : Bamboo as a building material has high compressive strength and low weight has been one of the most used building material as support for concrete, especially in those locations where it is found in abundance. Bamboo as a building material is conventionally associated with the region of Southeast Asia and South America where climate is best suitable for its cultivation. In many of the nations, bamboo is used to hold up suspension bridges or simply make places of dwelling.

11. Steel : The major advantages of steel sections in formwork are the ability of steel to form longer spans and its indefinite potential for reuse when handled with reasonable care. Steel sections are used in the fabrication of different formwork components, namely: Steel panel forms. Horizontal and vertical shores. Steel pan and dome components used for joist and waffle slabs. Steel pipes for formwork bracing .

12. Other heavy forms and formwork are also made of steel, such as bridge formwork. Steel is used for formwork when other materials are impossible to use because of their low strength. Steel forms are typically patented, and allowable loads are generally published by the manufacturers.

13. Aluminum stems from have lighted weight which reduces handling costs and offsets its higher initial material cost. When compared to steel panels, aluminum panels used for ganged forms weight approximately 50% less. The major problem with aluminum forms is corrosion: Pure aluminum is attacked chemically by wet concrete. Aluminum alloys have proven to be very successful in resisting corrosion. Support trusses fabricated with aluminum alloys have been effectively used for flying forms. These forms are lightweight and allow large lengths of deck forms to be moved easily. Cast aluminum alloy molds have also been used successfully to form ornamental concrete products. Aluminum:

14. Aluminum wall forms have also been used to produce textures on the surfaces of concrete walls. Because the strength of aluminum in handling, tension, and compression is less than the strength of steel, it is necessary to use larger sections when forms are made of aluminum. Because wet concrete can chemically attack aluminum, it is desirable to use aluminum alloys in resisting corrosion from the concrete.

15. Glass fibre reinforced polymer Glass fibres are basically made by mixing silica sand, limestone, folic acid and other minor ingredients. The mix is heated until it melts at about 1260°C. The molten glass is then allowed to flow through fine holes in a platinum plate. The glass strands are cooled, gathered and wound. The fibres are drawn to increase the directional strength. The fibres are then woven into various forms for use in composites. Glass fiber reinforced polymer sheet Based on an aluminium lime borosilicate composition glass produced fibres are considered the predominant reinforcement for polymer matrix composites due to their high electrical insulating properties, low susceptibility to moisture and high mechanical properties. Glass is generally a good impact resistant fibre but weighs more than carbon or aramid. Glass fibres have excellent characteristics equal to or better than steel in certain forms.

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