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  2. California bearing ratio - Wikipedia

    en.wikipedia.org/wiki/California_bearing_ratio

    The CBR is expressed as a percentage of the actual load causing the penetrations of 2.5 mm or 5.0 mm to the standard loads on crushed stone. A load penetration curve is drawn. The load values on standard crushed stones are 1,370 kgf (13.44 kN) and 2,055 kgf (20.15 kN) at 2.5 mm and 5.0 mm penetrations respectively. [citation needed]

  3. ACN-PCN method - Wikipedia

    en.wikipedia.org/wiki/ACN-PCN_method

    Ultralow strength: characterized by K = 20 MN/m^3 and representing all K values below 25 MN/m^3 for rigid pavements, and by CBR = 3 and representing all CBR values below 4 for flexible pavements D: Maximum allowable tire pressure: Unlimited: no pressure limit W: High: limited to 1.75 MPa X: Medium: limited to 1.25 MPa Y: Low: limited to 0.50 MPa Z

  4. Standard penetration test - Wikipedia

    en.wikipedia.org/wiki/Standard_penetration_test

    Symbol used in drawings Standard penetration test N values from a surficial aquifer in south Florida. The standard penetration test (SPT) is an in-situ dynamic penetration test designed to provide information on the geotechnical engineering properties of soil. This test is the most frequently used subsurface exploration drilling test performed ...

  5. AASHTO Soil Classification System - Wikipedia

    en.wikipedia.org/wiki/AASHTO_Soil_Classification...

    The AASHTO Soil Classification System was developed by the American Association of State Highway and Transportation Officials, and is used as a guide for the classification of soils and soil-aggregate mixtures for highway construction purposes.

  6. Traffic contract - Wikipedia

    en.wikipedia.org/wiki/Traffic_contract

    The CBR service category is used for connections that transport traffic at a constant bit rate, where there is an inherent reliance on time synchronisation between the traffic source and destination. CBR is tailored for any type of data for which the end-systems require predictable response time and a static amount of bandwidth continuously ...

  7. R-value (soils) - Wikipedia

    en.wikipedia.org/wiki/R-value_(soils)

    The R-Value test [1] measures the response of a compacted sample of soil or aggregate to a vertically applied pressure under specific conditions. This test is used by Caltrans for pavement design, replacing the California bearing ratio test. Many other agencies have adopted the California pavement design method, and specify R-Value testing for ...

  8. Constant bitrate - Wikipedia

    en.wikipedia.org/wiki/Constant_bitrate

    Constant bitrate (CBR) is a term used in telecommunications, relating to the quality of service.Compare with variable bitrate. [1]When referring to codecs, constant bit rate encoding means that the rate at which a codec's output data should be consumed is constant.

  9. Tribromofluoromethane - Wikipedia

    en.wikipedia.org/wiki/Tribromofluoromethane

    Toggle the table of contents. Tribromofluoromethane. ... CBr 3 F Molar mass: ... Value Refractive index, n, at 20 ...