In joints of precast concrete bridge segments, what are the functions of applying epoxy adhesive?
Epoxy adhesive is applied in these joints for the following purposes according to International Road Federation (1977): (i) It seals […]
Questions and Answers
If a contractor proposes to increase concrete cover beyond contractual specification (i.e. 40mm to 70mm), shall engineers accept the proposal?
In contractual aspect, based on the requirement of General Specification of Civil Engineering Works (1992 Edition), the tolerance of concrete
If on-site slump test fails, should engineers allow the contractor to continue the concreting works?
This is a very classical question raised by many graduate engineers. In fact, there are two schools of thought regarding
If concrete compression test fails, should Schmidt hammer test be adopted as an alternative test to prove the concrete strength?
The Scmidt hammer test is based on the elastic rebound of hammer which presses on concrete surface and it measures the
How to determine the size of elastomeric bearings?
For elastomeric bearing, the vertical load is resisted by its compression while shear resistance of the bearing controls the horizontal
How to determine the size of elastomeric bearings? Read Post »
How do engineer determine the number of cells for concrete box girder bridges?
If the depth of a box girder bridge exceeds 1/6 or 1/5 of the bridge width, then it is recommended
How do engineer determine the number of cells for concrete box girder bridges? Read Post »
General Specification for Civil Engineering Works (1992 Edition) Clause 15.09 specifies that tying wires for reinforcement adjacent to and above Class F4 and F5 finishes should be stainless steel wires. Why?
If plain steel tying wires are used for reinforcement adjacent to Class F4 and F5 finishes, it poses the problem
For long slender structures like beams, propping is required after removal of formwork. Why?
After concreting, the time at which striking of formworks should not be too long, otherwise it would affect the colour
For column reinforcements, why is helical reinforcement sometimes designed instead of normal links?
The use of links for column design in Britain is very popular. However, in U.S.A. engineers tend to use helical