Procedures for development of CBR design curves

final report

by A. Taboza Pereira

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Published 1977 by Dept. of Defense, Dept. of the Army, Corps of Engineers, Waterways Experiment Station, Soils and Pavements Laboratory in Vicksburg, Miss .
Written in English

Subjects:

• Pavements -- Design and construction.

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Edition Notes

Other titles	California bearing ratio design curves.
Statement	by A. Taboza Pereira.
Series	Instruction report - Waterways Experiment Station ; S-77-1
Contributions	United States. Army. Corps of Engineers., Waterways Experiment Station (U.S.).
The Physical Object
Pagination	57, A13, [22] p. :
Number of Pages	57
ID Numbers
Open Library	OL17646758M

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  R = radius of circular curve in meters. If velocity is in KMPH then e + f = V 2 / R. Super Elevation formula: The above formula is used only to calculate one of the missing value either e or f or V or R for design purpose consider the below procedure. Design procedure of Superelevation / Banking of road: Design procedure includes following steps. Design CBR in cut The design CBR of the subgrade in a cut should be the 10 percentile CBR encountered within the material depth. STRUCTURAL DESIGN METHODS Design methods for paved streets There are a number of design methods of varying complexity at the disposal of the designer. Some of these are purely empirical and others incorporate.

  Theory: California Bearing Ratio test was invented by California State Highway Department. This test is used to design the thickness of the flexible pavement. CBR value signifies the strength characteristics of the soil sub-grade which is compacted to the MDD using the OMC. The samples used for the testing are prepared in the laboratory. B. Performance curves are created for each of thecondition indices. They predict how a pavement will behave over time. There can be as few as one performance curve for each condition index, or as many as one performance curve for each combination of condition index and analysis section. C. A list of Treatment Alternatives must be developed. This shape indicates that a correction is case, you must first adjust the zero point of the curve. Figure illustrates the procedure you should use to adjust the zero point. First, draw a line that is tangent to the steepest portion of the concave curve and extend the tangent to .

Use of Dynamic Cone Penetrometer in Subgrade and Base Acceptance 5. Report Date April 6. Performing Organization Code 7. Author(s) Shin Wu, Shad Sargand 8. Performing Organization Report No. Work Unit No. (TRAIS) 9. Performing Organization Name and Address Ohio Research Institute for Transportation and the Environment (ORITE) File Size: 1MB. produce thickness design curves for portland cement concrete pavements. Research has indicated that a general conic equation can be used to satisfactorily estimate the work, as calculated by the Chevron N-layered program, at the bottom of the portland cement concrete slab under an kip single axleload. The California Bearing Ratio (CBR) is a measure of the supporting value of the subgrade. It is not unique and other tests such as the R-Value test and the Triaxial are used occasionally. It is however by far the most commonly used in Pavement Design. The CBR test should be used with soil at the calculated equilibrium moisture content.