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首页> 美国政府科技报告 >Nonwoven Geotextile Interlayers for Separating Cementitious Pavement Layers: German Practice and U.S. Field Trails
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Nonwoven Geotextile Interlayers for Separating Cementitious Pavement Layers: German Practice and U.S. Field Trails

机译：用于分离水泥路面层的非织造土工织物夹层：德国实践和美国田径

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Pavement engineering is traditionally a conservative field, but successful pavement engineers will constantly seek out proven innovative concepts with potential to improve pavement performance while reducing costs. Many pavement structures in the United States consist of more than one cementitious layer that requires separation. This could be a new concrete pavement (jointed or continuously reinforced) atop a cementitious base or, becoming increasingly popular, an unbonded concrete overlay. In both cases, an interlayer is often required for separation. While hot-mix asphalt is commonly used for this purpose, associated constructability, cost, and performance issues need to be recognized. The German highway community has more than 25 years of experience using an alternative interlayer made of a nonwoven geotextile. With proper selection and placement, these interlayers have resulted in excellent performance in separating new concrete pavement layers from the cementitious bases commonplace on the German motorway system.

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