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Development of Structural Layer Coefficients of Crumb Rubber-Modified AsphaltMixes from In-situ Deflection Tests

机译:从原位偏转试验开发胶粉改性沥青混合料结构层系数

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This report includes the results of testing Crumb Rubber Modified Asphalt (CRM)to quantify the layer coefficient values for CRM mixes. Several test sections were selected from recenlty constructed CRM pavement. The Falling Weight Deflectometer (FWD) data was collected at 15 meter intervals on each test section during a one month period. The first sensor of the FWD was located at the center of the loading plate with six others at a uniform radial distance of 306 mm apart. Three drops of the FWD load were used for target loadings of 31, 40 and 67KN. Tests were done in the outer wheel path of the travel lane. Cores were retrieved at 33 m intervals on each section to get the layer thickness and to test for resilient modulus in the laboratory. The pavement surface temperatures during test time were also recorded at each test location.

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