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首页> 外文期刊>Transportation Research Record >Long-Term Performance of Broken and Seated Pavements
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Long-Term Performance of Broken and Seated Pavements

机译：破损和就座路面的长期性能

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A study was developed to evaluate the effectiveness of breaking and seating (B/S) as a rehabilitation strategy for retarding reflective cracking in asphalt concrete (AC) overlays on jointed reinforced concrete pavements (JRCP). Several test sections were constructed by milling the original AC layer, breaking and seating the concrete slabs, and constructing new AC overlays. Control sections were constructed adjacent to the B/S sections in the same way, but without breaking the underlying concrete slabs. Two types of pavement breakers were used in this study: guillotine and pile hammer. The majority of the concrete slabs were broken into 0.46-m (18-in.) segments. Performance of the test sections was monitored for a total period of 9 years. Breaking the concrete slabs into smaller pieces resulted in a reduction in the flexural strength, an increase in the surface deflection (50% to 100%), and a decrease in area and spreadability (20% to 30%). Within 2 to 4 years, reflection cracks developed over more than 80% of the joints in all the control sections. The B/S sections were relatively free of cracks after 9 years. This result clearly indicates that breaking and seating has been extremely effective in minimizing and delaying reflection cracking. Based on the results of this study, it was concluded that breaking and seating is an effective technique for the rehabilitation of composite pavements (AC over JRCP). It provides an effective solution for the maintenance and rehabilitation of in-service composite pavements.
机译：开展了一项研究，以评估折断和就座（B / S）的有效性，作为缓解节理钢筋混凝土路面（JRCP）上的沥青混凝土（AC）覆盖层中反射裂缝的恢复策略。通过铣削原始的AC层，将混凝土板折断并安置，并构造新的AC覆盖层来构造几个测试部分。以相同的方式在B / S部分附近构造控制部分，但不会破坏下面的混凝土板。在这项研究中使用了两种类型的路面破碎机：断头台和桩锤。大部分混凝土板被分成0.46米（18英寸）的部分。测试部分的性能进行了总共9年的监控。将混凝土板破碎成较小的碎片会导致抗弯强度的降低，表面挠度的增加（50％至100％）以及面积和铺展性的降低（20％至30％）。在2到4年内，在所有控制区域中，超过80％的接缝产生了反射裂缝。 9年后，B / S断面相对没有裂纹。该结果清楚地表明，断裂和固定在最小化和延迟反射裂纹方面非常有效。根据这项研究的结果，得出的结论是，折断和落座是复合路面（AC优于JRCP）的有效修复技术。它为在役复合路面的维护和修复提供了有效的解决方案。

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