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Sleepers (ties) are mostly made up of _______________(a) wood(b) prestressed concrete(c) metal(d) steakI had been asked this question in my homework.Enquiry is from Railway Line topic in division Road Estimating, Sanitary and Water Supply Work of Civil Engineering Drawing

Answer»

Right choice is (b) prestressed concrete

Easiest explanation: Prestressed concrete is a FORM of concrete used in construction which is “pre-stressed” by being placed under compression prior to SUPPORTING any loads beyond its own dead WEIGHT. This compression is produced by the tensioning of high-strength “tendons” located within or adjacent to the concrete volume and is done to improve the PERFORMANCE of the concrete in service.



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