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Q. Asphalt mix design - durability vs. stability?
The main aim of asphalt mix design is to achieve a mix with economical blending of aggregates with asphalt to achieve the following:
(i) Workability to facilitate easy placement of bituminous materials without experiencing segregation;
(ii) Sufficient stability so that under traffic loads the pavement won't undergo distortion and displacement
(iii) Durability by having sufficient asphalt
(iv) Sufficient air voids
In asphalt mix design, high durability is generally attained at the expense of low stability. Therefore a balance has to be stricken between durability and stability requirements.
Roads in Hilly Areas: (a) The alignment selected should attain the changes in elevation by adopting the ruling gradient to the maximum length. Limiting and exceptional
how to use the revit program
Explain Some Points regarding to Hardness 1) Hardness removal using lime and soda is based on the solubility reactions of calcium carbonate, CaCO 3 and magnesium hydroxide, Mg
Explain the Critical Flow Critical flow occurs where the flow depth is at the critical depth. One location in an open channel is where the flow is approaching a free outfall.
Temporary bench marks
What is Partial Prestressing It is a form of prestressing in which tensile stresses are permitted, upto a limited extent, in concrete under working loads. As the permitted tens
Given: pretensioned rectangular beam b=6" h=20" f'c=4000psi f'ci=3000psi fti=.165ksi fts=.38ksi fci=1.8ksi fcs=1.8ksi R=0.80 Required: (a)Pi and e to maximize Md+
Q. What do you mean by Plain elastomeric pads? Plain pads are used for light or moderate loadings. Plain pads have a tendency to bulge under heavy loadings. In order to reduce
Q. Effect of Footing Size on Stress Zone? The modulus of elasticity of the soil may be determined by plotting stress-strain diagram based on triaxial test or plate load test.
Acid Test: This test is usually carried out on sand stones to examine the presence of calcium carbonate that weakens the weather resisting quality. In this particular test,
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