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___________ gives excellent exposed concrete surface requiring no further finishing treatment.

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in Construction & Building Materials by (190k points)
___________ gives excellent exposed concrete surface requiring no further finishing treatment.

(a) Timber

(b) Teak wood

(c) Steel

(d) Fibre glass

The question was posed to me in an online quiz.

This key question is from Materials Used for Formwork in portion Arches, Lintels, Stairs and Formwork of Construction & Building Materials

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Right choice is (c) Steel

To explain I would say: The exposed surface obtained by use of timber formwork invariably requires plastering for getting the desired finish of the concrete surface. Steel possesses more strength and is more durable than timber formwork.

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