钢桥类外文翻译--大跨度钢桥桥面上环氧沥青混凝土铺装(编辑修改稿)

钢桥类外文翻译--大跨度钢桥桥面上环氧沥青混凝土铺装(编辑修改稿)内容摘要：

the epoxy asphalt concrete is smaller than that of the other two materials. In addition, at 20℃ the pression intensity is 40 MPa using the uniaxial pression test. Table 1 Results of splitting performance test of solidified epoxy asphalt concrete samples Temperature/℃ Horizontal deformation under maximum load/mm Maximum load/kN Void ratio (%) Splitting intensity /MPa Stiffness modulus /MPa 25 1113 0 2683 15 3774 Table 2 Bending test for different kinds of asphalt mixture (at 15℃) Material Damage strength/MPa Maximum strain Bending stiffness modulus/MPa AC modified asphalt mixture 102 563 SMA 102 355 Epoxy asphalt mixture 103 2574 石家庄铁道大学四方学院毕业论文 5 Deformability and low temperature properties of epoxy asphalt concrete. Low temperature properties and the deformability of the epoxy asphalt concrete asphalt mixture are tested by bending and splitting tests at low temperature. Results of the splitting test at low temperature are shown in Table 3. Contrasted with SMA and AC modified asphalt mixture, epoxy asphalt mixture performs better at the low temperature. With the decrement of the temperatures, the maximum strain of SMA and AC modified asphalt mixtures fell to a greater extent than that of epoxy asphalt (contrasted with the test result at 15℃ ). At 60℃ and 70℃ , the dynamic stability of the AC modified asphalt mixture is 2193 and 695 (times/mm) and that of SMA is 2562 and 694 (times/mm), respectively. For epoxy asphalt concrete, the deformation at 60℃ is almost 0 and the dynamic stability 5460 (times/ mm) at 70℃ . Therefore, both the dynamic stability and the temperature property of epoxy asphalt are much better than those of other two kinds of asphalt mixture. At the same time, epoxy asphalt concrete shows super water stability in the soaking Marshall test. Therefore, epoxy asphalt concrete has a better resistance against water damage. If the thermal shrinkage coefficient of paving layer differs too much from that of the steel plate, cracking and slipping may take place under the temperature stress. Because shrinkage often fails in the lowtemperature area, the temperature for our experiment is set between 15℃ and 5℃ when the lineal shrinkage coefficient of epoxy asphalt concrete is between ( — 105)℃ and ( — 105)℃ for the steel plate. The difference of the shrinkage coefficient for the paving layer and the steal plate is not too large and almost remains 0 especially at low temperature. Researches on indirect tension (splitting) methods in recent years demonstrated that the indirect tension test can be used to describe the fatigue characteristics of the asphalt mixture. Splitting tests on the epoxy asphalt mixture, SMA, Gussasphalt concrete mixture and high grade modified asphalt concrete showed that the fatigue resistance performance of epoxy asphalt is the best. Fatigue performance of epoxy asphalt concrete paving of steel bridge deck can be more accurately reflected when paving layer and the steel plate are considered as a total subject investigated. According to the calculation results of the finite element analysis, maximal tensile stress and tension strain of the paving layer occur on the top of U type rib stiffener (Fig. 2, point A) under traffic load, with their directions vertical to driving course. Ta king point A as the center of a circle, the beam with 300 mm span and 100 mm width is intercepted on the bridge deck. Load and support are shown in Fig. 2. The loading force in 石家庄铁道大学四方学院毕业论文 6 the fatigue test can be equivalently converted based on stress, namely, the maximal tensile stress on the paving layer of plex beam is equal to that on paving layer of the bridge. When the load force of the fatigue test was 5 kN, beam loading wave was sine, and the loading frequency was 10 Hz, the plex beam 2 showed no damage at room temperature of 18℃ over circulatory load with 5 kN, the maximal value for 12020000 times, indicating that the designed epoxy asphalt concrete paving system can meet the traffic and load requirements for 15 years at room temperature. To further test the overload resistant property of the bridge deck, plex beam。