SBR沥青改性剂123(国外英文资料).docVIP

SBR沥青改性剂123(国外英文资料) Test for design of waterproof design of bridge 1. The introduction With the improvement of business quickly and road grade, highway overpasses and viaduct, negative bending moment of reinforced concrete beam and reinforced concrete bridge panel being repeated load of vehicle vibration and impact, the influence of the mechanical properties such as tensile, shear, and due to the expansion and contraction caused by the temperature, climate change, tend to produce fine cracks caused by bridge deck water seepage or leakage. The corrosion of the steel and the durability of the bridge. Especially the integration of a seam cast-in-situ concrete, although a variety of anti-cracking measures taken in the design and construction, but there is always the weak link, cracks, if do not take waterproof processing, will inevitably reduce the lifespan of the bridge. In order to prolong the service life of bridge, reduce maintenance costs and on the cement concrete bridge deck spraying a layer of waterproof coating, waterproof membrane formation, in order to achieve the purpose of the bridge deck waterproof is very necessary. Gb (5002-96) code for design of highway asphalt pavement and line standard JT014-97 highway asphalt pavement construction and acceptance standard requirements set in concrete of bridge deck pavement of the waterproof layer. The zhanglong expressway is the highway of the national highway 319 zhangzhou to longyan, with a total length of 117.2 km, including the 313.2km of longyan project. The viaduct accounts for 40 per cent of the length of the line and is 3.8 km long. The segment of viaduct maximum longitudinal grade 4.7%, the maximum transverse slope of 7%, pier maximum altitude of 81 meters, maximum span of 155 meters, upper respectively continuous rigid frame bridge, prestressed concrete T beams and slabs structure, etc. Floor system USES cement concrete with the composite structure of asphalt concrete pavement layer, or layer in C40 steel