Discuss the structural components of a flexible pavement.
What will be an ideal response?
A flexible pavement consists of the subgrade, the subbase, the base and
the wearing surface. The subgrade is usually the natural material located along the
horizontal alignment of the pavement and is prepared as a roadbed to serve as the
foundation of the pavement structure. The subbase is located immediately above
the subgrade and consists of material of a superior quality to that which generally
is used for subgrade construction. When the quality of the subgrade material
meets the requirements of the subbase material, the subbase component may be
omitted. The base course lies immediately above the subbase (or subgrade) and
usually consists of granular materials such as crushed stone, crushed or uncrushed
slag, crushed or uncrushed gravel, and sand. The requirements for plasticity,
gradation, and strength increase through the subgrade, subbase, and base courses.
The surface course is the upper course of the road pavement and is constructed
immediately above the base course. The surface course in flexible pavements
usually consists of a mixture of mineral aggregates and asphaltic materials.
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What will be an ideal response?
Diagram and describe the difference between a ceiling that is attached to the building structure and one that is suspended from the building structure.
What will be an ideal response?
A small circle is easy to sketch when you sketch it like a letter "O."
Answer the following statement true (T) or false (F)