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  • 7/31/2019 Domains alpaha and Mu ,

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    Domains of Permanent Deformation Coefficient Alpha and

    Mu for Local Iraqi Hot Climate Variation

    Ahmad Mahir Mohammed Al-Ani

    University of Baghdad

    Ex. Bitumen Engineer

    07902291942

    [email protected]

    I. Abstract:Permanent Deformation Coefficients, such as alpha () and mu () show

    influence of mixtures properties on flexible pavement probable rut development.Assessment of these coefficients requires a data bank of mixture parameters

    (aggregate type, gradation, binder type, contents and mixtures volumetric),

    temperature and loading conditions. A comprehensive laboratory study was carried

    out on 22 mixtures ranging from fine to coarse with two method of adding lime to

    aggregate which are used in typical hot weather areas of Iraq. The specimens were

    bj d li l di PRLS i d d i i

    mailto:[email protected]:[email protected]:[email protected]
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    bj t d t li l di PRLS i d t t d i t i t t

    0.4

    0.43

    0.46

    0.49

    0.52

    0.55

    0.58

    0.610.64

    0.67

    0.7

    0.73

    0.76

    0.79

    0.82

    0 50 100

    Alpha

    Temperature

    Control W1H-d W1H-w

    0.4

    0.43

    0.46

    0.49

    0.52

    0.55

    0.58

    0.61

    0.64

    0.67

    0.7

    0.73

    0.76

    0 20 40 60 80

    Alpha

    Temperature

    Control W1.5H-d W1.5H-w

    0.4

    0.43

    0.46

    0.49

    0.52

    0.55

    0.58

    0.61

    0.64

    0.67

    0.7

    0.73

    0.76

    0 20 40 60 80

    Alpha

    Temperature

    Control W2H-d W2H-w

    0.4

    0.43

    0.46

    0.49

    0.520.55

    0.58

    0.61

    0.64

    0.67

    0.7

    0.73

    0.76

    0 20 40 60 80

    Alpha

    Temperature

    Control W2.5H-d W2.5H-w

    0.4

    0.43

    0.46

    0.49

    0.52

    0.55

    0.58

    0.61

    0.64

    0.67

    0.7

    0.73

    0.76

    0 50 100

    Alpha

    Temperature

    Control W3H-d W3H-w