Evaluation of different modulus input on the mechanical responses of asphalt pavement based on field measurements

Characteristics and analysis of dynamic strain response on typical asphalt pavement using Fiber Bragg Grating sensing technology

Dynamic Response and Fatigue Damage of Asphalt Pavement Under Multiple Coupling Factors

The challenge of constructing roads on frozen ground in cold climes has long been acknowledged on a global scale. As a result, particular requirements for pavement materials and structures have been developed to address the special construction and usage conditions for highway pavement.
 The influence of frozen soil change features on pavement materials in cold places is utilized to research the fluctuation law of subgrade temperature field under cement concrete and asphalt pavements because subgrade and pavement illnesses frequently occur in permafrost locations. The residual
 tensile strength of regular emulsified asphalt dropped to 50% after 7 days of continuous immersion, while that of high-performance modified emulsified asphalt only reached 75%. However, the residual tensile strength of water-borne epoxy resin emulsified asphalt remained over 90%. Regardless
 of how smooth or uneven the contact surface is, the results show that water-borne epoxy resin emulsified asphalt has good adhesive qualities. However, the water-borne epoxy resin emulsified asphalt still retained over 90% of its original tensile strength. Regardless of how smooth or uneven
 the contact surface is, the results show that water-borne epoxy resin emulsified asphalt has good adhesive qualities.

Study on the Influence of Frozen Soil Change Characteristics on Pavement Materials in Cold Region

Load response and fatigue life of cement-stabilized macadam base structure considering dynamic and static load differences and tension-compression modulus differences

In order to reveal the changing law of the mechanical response of asphalt pavements under the action of vehicle load and provide references for the design of durable pavements, three typical asphalt pavement structures with flexible base (S1), combined base (S2), and semi-rigid base (S3) were selected to perform field strain tests under static and dynamic load using the fiber Bragg grating optical sensing technology. The changing characteristics of the strain field along the horizontal and depth directions of pavements were analyzed. The results indicate that the most unfavorable asphalt pavement layers were the upper-middle surface layer and the lower base layer. In addition, the most unfavorable loading positions on the surface layer and the base layer were the center of wheel load and the gap center between two wheels, respectively. The most unfavorable layer of the surface layers gradually moved from the lower layer to the upper layer with the increase of base layer modulus. The power function relationships between structural layer strain and vehicle speed were revealed. The semi-rigid base asphalt pavement was the most durable pavement type, since its strain value was lower compared to those of the other structures.

Borges Cabrera Milkos

Papers

Field measurement of strain response for typical asphalt pavement