Abstract: Abstract. Rotary axial percussion drilling is a high-speed drilling technology that has been widely applied. However, the traditional single-impactor arrangement has low drilling efficiency, is prone to intensify drillstring ...

Abstract: The asphalt mixture, AC - 13 C, is aged in an oven for five different periods, and then, stress relaxation tests are conducted at

Abstract: To study the combination principles of structural design and material design in asphalt pavement with semi-rigid bases, the software BISAR3. was used to analyze the load responses in asphalt pavement with two layers of ...