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  2. Shell pavement design method - Wikipedia

    en.wikipedia.org/wiki/Shell_pavement_design_method

    The Shell pavement design method was used in many countries for the design of new pavements made of asphalt. [1] First published in 1963, [2] it was the first mechanistic design method, providing a procedure that was no longer based on codification of historic experience but instead that permitted computation of strain levels at key positions in the pavement.

  3. Proctor compaction test - Wikipedia

    en.wikipedia.org/wiki/Proctor_compaction_test

    The original Proctor test, ASTM D698 / AASHTO T99, uses a 4-inch-diameter (100 mm) by 4.584-inch-high (116.4 mm) mold which holds 1/30 cubic feet of soil, and calls for compaction of three separate lifts of soil using 25 blows by a 5.5 lb hammer falling 12 inches, for a compactive effort of 12,375 ft-lbf/ft 3.

  4. Los Angeles abrasion test - Wikipedia

    en.wikipedia.org/wiki/Los_Angeles_abrasion_test

    C 131–03. Standard Test Method for Resistance to Degradation of Small-Size Coarse Aggregate by Abrasion and Impact in the Los Angeles Machine. ASTM International. Lavin, P. (2003). Asphalt Pavements: A Practical Guide to Design, Production and Maintenance for Engineers and Architects. CRC Press. ISBN 978-0-203-45329-2. Woolf, D.; Runner, D ...

  5. American Association of State Highway and Transportation ...

    en.wikipedia.org/wiki/American_Association_of...

    The contract will specify AASHTO Test Designation T 22, "Compressive Strength of Cylindrical Concrete Specimens," as the means of determining compressive strength. The laboratory performing T 22 will be required to be accredited in that test. AASHTO coordinates the numbering of Interstate Highways, U.S. Highways, and U.S. Bicycle Routes.

  6. Present serviceability index - Wikipedia

    en.wikipedia.org/wiki/Present_Serviceability_Index

    AASHO Road Test was a set of experiments carried out by the AASHTO from 1956 to 1961. [4] Unlike the PSR, which was a ride quality rating that required a panel of observers to ride in a car over the pavement of interest, the PSI does not require a panel of experts. Therefore, it was a more practical approach for large-scale pavement networks.

  7. Sand equivalent test - Wikipedia

    en.wikipedia.org/wiki/Sand_equivalent_test

    It is measured by standardized test methods such as ASTM D2419, AASHTO T176, and EN 933–8. [1] The test is used to qualify aggregates for applications where sand is desirable but fines and dust are not. A higher sand equivalent value indicates that there is less clay‐like material in a sample.

  8. AASHO Road Test - Wikipedia

    en.wikipedia.org/wiki/AASHO_Road_Test

    Contemporary historic place marker roadsign at the site. The results from the AASHO road test were used to develop a pavement design guide, first issued in 1961 as the AASHO Interim Guide for the Design of Rigid and Flexible Pavements, with major updates issued in 1972 and 1993.

  9. Direct shear test - Wikipedia

    en.wikipedia.org/wiki/Direct_shear_test

    The U.S. and U.K. standards defining how the test should be performed are ASTM D 3080, AASHTO T236 and BS 1377-7:1990, respectively. For rock the test is generally restricted to rock with (very) low shear strength. The test is, however, standard practice to establish the shear strength properties of discontinuities in rock.