In: Civil Engineering

Compare the methods of measuring tensile strength by (a) direct tension; (b) splitting tension; (c) flexure.

The direct tension, splitting tension and flexure this three methods are mainly used for measuring tensile strength of concrete.

Direct tension test is used for measuring tensile strength under pure tension condition, splitting tensile strength is done on concrete cylinder as which splits occurs accross the vertical diameter, flexure tensile test is done on rcc beam or slab by centre point load to measure the resistance under bending or yielding.

The direct tension test is used for uniaxial state, the splitting tension is used for multiaxial state and flexure is used for non-uniform state.

Flexure test is more applicable for determination of strain rate effect than direct tension and splitting tension test because in increase of energy i.e kinetic and frictional consumptions in flexure test is more significant.

In Flexure and Splitting tensile strength method mainly ASTM method is followed, where in direct tension tension test there is no recommendations in ASTM.

We’d like to compare 3 analytical methods A, B and C for
measuring the same parameter to determine whether those 3 methods
are equivalent or not.
Perform three separate t tests to compare method A to method B,
method A to method C, and method B to method C using results in the
Table below. If using Minitab, make sure to check “Assume equal
variances” box under “options” for each t-test.
Perform ANOVA and compare the results with the t...

Do some internet research on the properties of composite
materials. a) Compare the tensile strength of a typical
glass fibre reinforced polymer with the tensile strength of a
carbon fibre reinforced polymer. Make sure you the fibre lay-up is
the same in your two examples and that you record what that is in
your answer. Use data tables from reputable engineering or
scientific web pages or material suppliers only and cite your
reference(s).
Answer:.......................................................................................................................
.................................................................................................................................
.................................................................................................................................
.................................................................................................................................
b) Write a...

6.Demonstrate the effect of cold work on the yield strength,
tensile strength, percent elongation, Rockwell B hardness, and
modulus of elasticity of Red Brass for flat products by plotting
these quantities as functions of the percent cold work using
EXCEL. Use English system data obtained from
www.matweb.comfor HXX tempers.

Provide a sketch of how the tensile strength and the hardness of
a simple Fe-C alloy changes as the carbon content is varied.
Details the reasons behind the responses that you have sketched –
ensuring you relate these to the relevant diagrams.

Discuss the variation of tensile strength, elongation, Vickers
hardness and fracture toughness with C (carbon) % for normalised
carbon steels. Write 500 words

An experiment to compare the tension bond strength of polymer
latex modified mortar (Portland cement mortar to which polymer
latex emulsions have been added during mixing) to that of
unmodified mortar resulted in x = 18.15 kgf/cm2
for the modified mortar (m = 42) and y = 16.82
kgf/cm2 for the unmodified mortar (n = 31). Let
μ1 and μ2 be the true
average tension bond strengths for the modified and unmodified
mortars, respectively. Assume that the bond strength distributions...

5. An experiment to compare the tension bond strength of polymer
latex modified mortar (Portland cement mortar to which polymer
latex emulsions have been added during mixing) to that of
unmodified mortar resulted in ¯x = 18.12 kgf/cm 2 for the modified
mortar (m=40) and ¯y = 16.87 kgf/cm 2 for the unmodified mortar (n=
32) . Let µ1, µ2 be the true average tension bond strengths for the
modified and unmodified mortars, respectively. Assume that the bond
strength distributions...

5. An experiment to compare the tension bond strength of polymer
latex modified mortar (Portland cement mortar to which polymer
latex emulsions have been added during mixing) to that of
unmodified mortar resulted in ¯x = 18.12 kgf/cm 2 for the modified
mortar (m=40) and ¯y = 16.87 kgf/cm 2 for the unmodified mortar (n=
32) . Let µ1, µ2 be the true average tension bond strengths for the
modified and unmodified mortars, respectively. Assume that the bond
strength distributions...

An experiment to compare the tension bond strength of polymer
latex modified mortar (Portland cement mortar to which polymer
latex emulsions have been added during mixing) to that of
unmodified mortar resulted in x = 18.18 kgf/cm2
for the modified mortar (m = 42) and y = 16.89
kgf/cm2 for the unmodified mortar (n = 30). Let
μ1 and μ2 be the true
average tension bond strengths for the modified and unmodified
mortars, respectively. Assume that the bond strength distributions...

8). Surface tension: A.is tendency of liquid to maximize surface
area B. decreases with decreasing strength of intermolecular force
C. increases with decreasing strength of intermolecular force D.
all are correct
9) Viscosity: A. decreases with size of molecules B. decreases
with decreasing strength of intermolecular force C. increases with
decreasing temperature D. all are correct
10) Adding salt to water does what? A. lowers freezing point C.
increases ion-dipole interactions B. increases surface tension D.
all are correct
11)...

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