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首页> 外文期刊>Bulletin des Laboratoires des Ponts et Chaussees >Comportement de la moquettte en beton a hautes performances sous sollicitations thermiques et trafic accelere
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Comportement de la moquettte en beton a hautes performances sous sollicitations thermiques et trafic accelere

机译：高性能混凝土地毯在热应力和加速交通下的行为

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摘要

"High-performance concrete carpet"is an innovative concept in the area of hydraulic pavement materials and consists of associating a relatively thick and usually cracked base layer with a thin, reinforced high-performance concrete wearing course that does not bond to its support. This pa vement may be assumed vulnerable to two types of deterioration: buckling of the wearing course during hot weather periods, and damage due to truck traffic. In order to better evaluate these risks, a 10 m x 1.50 m test section was built at the LCPC Research Center in Nantes. Section deformations were monitored during an entire year and a million truck-type loading cycles (with a 6.5-ton twinning) were imposed using the so-called "Fabac Machine"linear fatigue device. A theoretical computation, partially validated by in situ deformation measurements, would suggest a maximum compression of 3.4 MPa, which represents a value largely insufficient to cause elastic instability given the typical radius of curvature for new pavements. Furthermore, the deterioration observed during fatigue loading was limited to three transverse, narrow and non-propagating cracks. At this stage of the work program, it can thus be concluded that the concept seems promising and that pursuing its development by means of a full-scale jobsite experiment would constitute the next worthwhile step.
机译：“高性能混凝土地毯”是液压路面材料领域的一个创新概念，它包括将相对较厚且通常开裂的基础层与不与支撑物粘结的薄而增强的高性能混凝土耐磨层相关联。可以假定这种状态容易受到两种类型的损坏：在炎热天气期间穿着过程的屈曲，以及由于卡车交通造成的损坏。为了更好地评估这些风险，在南特的LCPC研究中心建造了一个10 m x 1.50 m的测试段。整年都对断面变形进行了监测，并使用所谓的“ Fabac Machine”线性疲劳装置施加了一百万辆卡车式装载周期（带有6.5吨双胎）。通过原位变形测量得到部分验证的理论计算表明，最大压缩为3.4 MPa，考虑到新路面的典型曲率半径，该压缩值在很大程度上不足以引起弹性不稳定性。此外，在疲劳载荷过程中观察到的劣化仅限于三个横向，狭窄和非扩展的裂纹。因此，在工作方案的现阶段，可以得出结论，这一概念似乎很有希望，而通过全面的现场试验来追求其发展将是下一个有价值的步骤。

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