Load transfer significantly affects the performance of a concrete pavement. Poor load transfer may result in faulting, transverse cracking, and pumping, as well as reducing the service life of the pavement. Because roller-compacted concrete pavement (RCCP) is constructed without dowel bars, load transfer at its joints or cracks mainly depends on shear transfer capabilities induced by aggregate interlocks and base stiffness. In this paper, we evaluate the deflection-based load transfer efficiency (LTE_δ) across transverse cracks and its influencing variabilities of a full-scale RCCP test section in South Korea, using a falling weight deflectometer (FWD). Two different aggregate gradations with 19- and 13-mm maximum aggregate size were used in RCCP mixtures to capture their effects on LTE_δ. FWD tests were conducted at different times over a year to consider the effects of temperature changes and crack opening size on LTE_δ. Results showed that temperature changes, crack opening size, and aggregate size significantly affect the LTE_δ. Significant reduction of LTE_δ was observed for the RCCP mixture with 13-mm maximum aggregate size. Therefore, using a 19-mm maximum aggregate size in RCCP mixture provides a better LTE_δ and is expected to improve the structural performance of RCCP.

荷载传递会显着影响混凝土路面的性能。不良的载荷传递可能会导致断层，横向裂缝和泵送，并缩短人行道的使用寿命。由于碾压混凝土路面（RCCP）的结构没有销钉，因此其接合处或裂缝处的荷载传递主要取决于骨料互锁和基础刚度引起的剪切传递能力。在本文中，我们评估的挠度为基础的载荷传递效率（LTE _δ跨横向裂纹及在佛罗里达州uencing在韩国全面粗能力测试部分的变异），采用落锤去佛罗里达州ectometer（FWD）。与19-和13毫米的最大集料大小的两个不同集合灰度在RCCP混合物用于捕获其上LTE效果_δ。在一年中的不同时间进行了FWD测试，以考虑温度变化和裂纹开口尺寸对_{LTEδ的影响}。结果表明，温度变化，裂纹开口尺寸和聚集体尺寸显着影响_LTEδ。LTE的显着降低_δ观察到用13毫米最大集料粒径的粗能力混合物。因此，在粗能力混合物使用19毫米的最大集料尺寸提供了更好的LTE _δ并有望提高RCCP的结构性能。