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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.
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The trigonometric levelling from the surveyor's notes is shown below. The ground elevation of T (ft) is most nearly: Solution: The elevation of point P can be found from: E
Joint filler in concrete expansion joints - a must?? Presence of joint filler is required to the proper functioning of concrete joints however some may doubt its value. For a c
Surface Dressing: Surface dressing is an application of a thin film of bituminous binder followed by a coat of aggregates of single size, rolled into position. Surface dressi
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Q. What do you mean by Depth of Scour? The maximum scour depth in a stream can be ascertained when ever possible by actual sounding at or near the site proposed for the bridge
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