STP774

    Potential for Asphalt Stabilized Sand Bases in Texas

    Published: Jan 1982


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    Abstract

    Depletion of high quality aggregate sources in concert with inflated transportation costs has created a need for utilization of locally available aggregate sources as base materials. Many state specifications, developed only for asphalt concrete surface courses, preclude the use of low quality aggregates that may be suitable for bases in properly designed pavement systems. Paving mixtures containing poorly graded sands from Texas and asphalt cement or emulsified asphalt are evaluated using results from two laboratory tests: (1) resistance to lateral flow (R-value) before and after moisture treatment, and (2) diametral resilient modulus. Ranges of resilient moduli that have provided successful pavements in Texas are presented. Moduli determined in the laboratory have been correlated to moduli collected in the field by in situ deflection testing.

    Keywords:

    aggregates, concrete, asphalt, sand, pavement, cement


    Author Information:

    Little, DN
    Assistant professor and professor, Texas A&M University, College Station, Tex.

    Button, JW
    Assistant research engineer, Texas Transportation Institute, Texas A&M University, College Station, Tex.

    Epps, JA
    Assistant professor and professor, Texas A&M University, College Station, Tex.


    Paper ID: STP32461S

    Committee/Subcommittee: D04.04

    DOI: 10.1520/STP32461S


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