【正文】 atory and paving process in the spot, the optimum ratio of stone to oil was determined to be % after the performance test on the unsolidified sample. The intensity of epoxy asphalt concrete was measured by the Marshall test, splitting test, bending test and pression test, respectively. The test results were pared with Gussasphalt concrete, SMA and densegraded modified asphalt concrete. 石家莊鐵道大學四方學院畢業(yè)論文 4 Stability of the Marshall paring the results of the Marshall test of unsolidified samples with those of the solidified sample (the average room temperature was 15℃ ), the stability of the unsolidified sample increased as the time went on. But that of the solidified samples is greater than the unsolidified ones and this is one of the mon properties of epoxy asphalt concrete, which are different from other mon types of the asphalt mixture. It shows that the treatment at a high temperature has a good influence on the mechanical properties of epoxy asphalt concrete. The performance test shows that the epoxy asphalt concrete has good temperature stability (Table 1). The Marshall stability and splitting performance of the solidified sample are much better than those of the unsolidified ones, indicating that high temperature has played an important role in the formation of binding strength. Therefore, it is favorable to pave the bridge deck at high temperature. Bending contrast test results of SMA and AC modified asphalt samples are shown in Table 2. The bending intensity of epoxy asphalt concrete is MPa, far greater than that of AC modified asphalt. The deformation degree (deflection at the span center) of 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 石家莊鐵道大學四方學院畢業(yè)論文 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) method