Shrinkage cracking is one of the primary distresses found in cementitiously stabilized layers (CSL) of pavements. Shrinkage can cause cracking on the surface layer due to the bond between the surface layer and the CSL. Shrnkage of CSL includes autogenous shrinkage due to hydration, drying shrinkage due to loss of moisture, and thermal shrinkage due to low temperature contraction. The current methodology for analysis and performance prediction of CSL pavements in the Mechanistic-Empirical Pavement Design Guide (MEPDG) does not account for the prediction of shrinkage cracking. Given the importance of shrinkage cracking, incorporation of a shrinkage cracking model for CSL into the MEPDG will improve its analysis and design capability. This study uses dimensional analysis to develop a shrinkage cracking model to predict crack spacing and widths for CSL for stabilized fine and coarse-grained soils. The specific functional form of the shrinkage cracking model was developed based on field data as well as pilot-scale laboratory experimental results. It is found that the developed model for shrinkage cracking is effective in predicting shrinkage crack spacing and widths. Further calibration of the shrinkage cracking model is needed using additional field data.

收缩裂缝是在水泥路面稳定层（CSL）中发现的主要问题之一。由于表面层和CSL之间的键合，收缩会导致表面层破裂。CSL的收缩包括由于水合引起的自发收缩，由于水分流失引起的干燥收缩，以及由于低温收缩引起的热收缩。《机械-经验性路面设计指南》（MEPDG）中用于CSL路面分析和性能预测的当前方法并未解决收缩裂缝的预测问题。考虑到收缩裂纹的重要性，将CSL的收缩裂纹模型纳入MEPDG将提高其分析和设计能力。这项研究使用尺寸分析来建立收缩裂缝模型，以预测稳定细土和粗粒土CSL的裂缝间距和宽度。收缩裂缝模型的特定功能形式是根据现场数据以及中试规模的实验室实验结果开发的。发现所建立的收缩裂纹模型在预测收缩裂纹的间距和宽度方面是有效的。需要使用其他现场数据对收缩裂缝模型进行进一步的校准。