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QuestionIn a concrete compression test, usually 150mmx150mmx150mm concrete cube examples are used for testing. Why isn't 100mmx100mmx100mm concrete cube samples used in test in its place of 150mmx150mmx150mm concrete cube samples? AnswerEssentially force supplied by a concrete compression machine is a specific value. For regular concrete strength application, say under 50MPa, the stress produced by a 150mmx150mmx150mm cube is enough for machine to crush the concrete sample. However, but designed concrete strength is 100MPa, under same force (about 2,000kN) supplied by machine, stress in a 150mmx150mmx150mm cube is not enough to crush concrete cube. So, 100mmx100mmx100mm concrete cubes are used instead to increase applied stress to crush concrete cubes. For regular concrete strength, cube size of 150mmx150mmx150mm is before now enough for crushing strength of a machine.
Why are undisturbed samples needed? Describe any one procedure of obtaining undisturbed samples for a multi-storeyed building project. For what purpose are geophysical methods u
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Uses of Stones Stones are used in the following civil engineering constructions are described: (i) Stone masonry which is used for the construction of foundations, , columns
Parallel Pipe Systems or Multipath Pipeline Problems Two or more sections of piping (branches) of different diameters, lengths and/or pipe materials originating and terminating
define
the two sides of a triangle are 17cm and 28 cm long, and the length of the median drawn to the third side is equal to 19.5. find the distance from an endpoint of this median to the
State the term - Relaxation of Stress in Steel If we keep a high-tensile steel wire stretched and maintained at a constant strain, the value of the force in the wire does not
State the term Axial Prestressingin Concrete If the centroid of cross-sectional areas of tendons is at the location of the centroid of the cross-section of the concrete member,
Q. Grouting in segmental linings in tunnels? Grouting is typically carried out under pressure in segmental linings at the time of tunnel construction due to the below reasons:
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