Luqiao surface materials - Epoxy Asphalt to achieve localization

Southeast University research and development of a new type of pavement materials - epoxy asphalt, through the experts' team for many years of unremitting efforts, hard work, and finally get success. Broke the long-term monopoly of this product by the foreign situation, with independent intellectual property rights.

Complete sets of key technology and engineering application of the large span bridge deck paving, won the national science and Technology Progress Award in 2011 two.

The design theory and method of the steel bridge deck pavement of long span bridge has been published, which provides a guide for the application of epoxy asphalt.

Sha Qinglin (academician of the Academy of Engineering China): "the design theory and method of long-span steel bridge deck" author of academician Huang Wei from the American experience, the use of epoxy asphalt binder layer with epoxy asphalt concrete layer, successfully applied to the Nanjing Yangtze River Bridge, the Run Yang bridge, a long-span steel bridge deck, and creatively put forward a complete set of key technologies of steel deck asphalt concrete pavement, has created great economic and social benefits.

This book comprehensively and thoroughly summarizes the design theory and method of this kind of bridge asphalt concrete. It includes the technical index of asphalt concrete, axle load conversion method, static, dynamic and fatigue characteristics, high and low temperature performance and the design and control standard of the steel bridge surface anticorrosive adhesive layer, which is the first time in China. The logic is clear and fluent, combining theory and practice, is an academic work of the rare.

Zhou Haitao (academician of the Academy of Engineering Chinese): "the design theory and method of long-span steel bridge deck is the first country on long-span steel bridge deck design theory and method of the monograph, the arrangement and coherent text, rich in content and theme of the novel.

The book through the comprehensive introduction to key technology of long-span steel bridge deck system, establishment of long-span steel bridge deck design theory and method, especially in Nanjing Yangtze River Bridge, Nanjing Yangtze River Bridge and Runyang Bridge and other domestic big span bridge steel deck paving of the scientific research and engineering practice has accumulated test results a large amount of data and mechanical analysis, provides a rich and detailed information for the writing of this book. The design method of epoxy asphalt concrete composite beam fatigue test method, in this book and the related design control index, both put forward for the first time; simplified calculation analysis of steel deck pavement mechanics formula, the axle load conversion method and optimization method of pavement collected in at home and abroad are put forward for the first time.

The most valuable is that the results of this book has been successfully implemented in the steel bridge deck pavement of many large span bridges in our country.

Domestic epoxy asphalt compared to other products show the advantages of:

Excellent properties of epoxy asphalt concrete:

1, high strength and high stiffness: hot mix epoxy asphalt concrete with high strength, excellent mechanical properties; the Marshall stability can be as high as 45 kN to 80 kN, and general Marshall stability of asphalt concrete is only 8 kN ~ 12 kN, is 5~8 times that of ordinary asphalt concrete, and the current value but roughly. Epoxy asphalt concrete pavement not only has close to the strength of the rigid pavement (compressive strength of more than 40Mpa), but also has a flexible road comfort.

2, good temperature stability: epoxy asphalt is a kind of thermosetting materials, will become soft at high temperature, but will not flow. Epoxy asphalt concrete paving of the Luqiao mask has good high-temperature stability, does not appear in the rut, pushing, bags and other diseases. But at low temperature, but also sub brittle hard, good crack resistance. Three point bending test of epoxy asphalt concrete, load frequency of 10 Hz, the test piece stiffness modulus respectively at different temperature, and compared with ordinary concrete, at 0 DEG C, epoxy asphalt concrete and ordinary asphalt concrete stiffness modulus had little difference, but at 20 DEG C at room temperature is high 3 times, and 40 degrees in the summer high temperature is 8 times that of ordinary asphalt concrete, the higher the temperature is, the bigger difference between the stiffness modulus. This indicates that epoxy asphalt concrete has high strength, and low temperature is not more than the ordinary asphalt concrete is more brittle, but at high temperatures than ordinary asphalt concrete anti deformation ability is much higher, showing good stability.

3, good layer bonding ability: the use of epoxy asphalt paving of the bond layer has a good bonding ability. Under the temperature of 23 C, the elongation of the epoxy asphalt adhesive layer was tested with the elongation of 500 min mm/, the tensile strength was 81 MPa, the elongation at break was 230%.

4, good corrosion resistance: ordinary asphalt concrete bridge deck, such as diesel and other fuel infiltration, will make the asphalt lost bond and loose. Epoxy asphalt concrete is not afraid of the erosion of fuel. The epoxy asphalt concrete Marshall was immersed in diesel oil to observe the change of the test piece. After two weeks of immersion, the specimen without any sharp threshing, loose phenomenon, the specimen is still very hard to test the Marshall stability still reached 30 kN, is 3 times that of ordinary asphalt concrete. Therefore, pavement of long span steel bridge deck, cement deck or highway pavement can avoid diseases caused by automobile oil infiltrated with epoxy asphalt concrete as; at the same time can effectively prevent the winter snow on road salt bridge damage.

5, excellent fatigue performance: epoxy asphalt concrete due to high strength, so under the same load, the performance of a very good resistance to fatigue. 10~30 times of fatigue life of ordinary asphalt concrete. Test results show that the epoxy asphalt pavement layer is equivalent to 15 years after the test of the load.