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What are the possible defaults for precast concrete pipes made by spinning and vertical casting?

Small diameter precast concrete pipes are normally manufactured by spinning method. The spinning method basically makes use of the principle of centrifugal forces which diminishes towards the centre of precast pipe. Hence, problems like the presence of voids and variation of dimension occur frequently and remedial works like filling of voids by cement mortar has to be carried out depending on the severity of deficiency.

Large diameter precast concrete pipes are commonly produced by vertical casting method. In this method the concrete pipes are normally placed upright with spigot staying on top, resting on socket moulds before the freshly-placed concrete has set. There is a possibility of deformation of pipe spigots to form oval shapes.

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This question is taken from book named – A Self Learning Manual – Mastering Different Fields of Civil Engineering Works (VC-Q-A-Method) by Vincent T. H. CHU.

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Kanwarjot Singh

Kanwarjot Singh is the founder of Civil Engineering Portal, a leading civil engineering website which has been awarded as the best online publication by CIDC. He did his BE civil from Thapar University, Patiala and has been working on this website with his team of Civil Engineers.

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