Question

Joint sealing compounds are impermeable ductile materials which are required to ___________________

(a) increase the bond

(b) provide a watertight seal by adhesion to concrete

(c) shorten the water path

(d) avoid the risk of a fault in an embedded water bar

I got this question in an internship interview.

This key question is from Joints Provision and Water Bars in RCC Ducts of Aqueducts in division Cross Drainage Work of Irrigation Engineering

Answer 1

Correct option is (b) provide a watertight seal by adhesion to concrete

Easiest explanation: They are impermeable ductile materials and commonly used materials are based on asphalt, bitumen or coal tar with or without fillers. These are required to provide a water-tight seal by adhesion to the concrete. Water bars are used to increase the bond and shorten the water path.