The construction methods of Engineered Cementitious Composites (ECC) are crucial for ensuring the structural performance of ECC pavements, which have demonstrated superior fatigue life and heavy traffic capacity. However, the commonly used rolling compacted (RC) method for pavement has never been explored for RC-ECC pavement. In this study, RC-ECC was developed via theoretical and experimental methods to achieve a compacted ECC during pavement construction. Firstly, a theoretical model for RC-ECC was established based on the stress equilibrium equation of ECC’s green strength development and the roller’s driving stress. Afterwards, the proposed theoretical model was validated by experimental results considering sand/binder ratio, binder types (fly ash, two volcanic ash), and calcium sulphoaluminate cement (CSA) content. The relative settlement and opening time were suggested as critical factors for developing RC-ECC. The maximum allowable relative settlement was conservatively suggested to be 0.1 below 90 min, and 0.05 between 90-150 min, while a minimum relative settlement of 0.01 was proposed to attain a satisfactory compaction quality. To achieve this, a specially customized or light roller (1 ton herein) was preferred. Modest CSA content is required to accelerate green strength development while keeping sufficient opening time for rolling compaction. Volcanic ash-based RC-ECC exhibited longer opening time than fly ash RC-ECC due to its angular morphology. RC-ECC achieved 14-27 % higher MOR than un-compacted ECC, resulting in a thinner thickness and lower embodied carbon on pavement. RC-ECC holds promises for pavement construction; meanwhile, more investigations relating to roller selection, ECC layer thickness, and rolling speed warrant future studies.

中文翻译：

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辊压工程水泥基复合材料 （ECC） 的理论和实验探索

工程水泥基复合材料 （ECC） 的施工方法对于确保 ECC 路面的结构性能至关重要，ECC 路面已表现出卓越的疲劳寿命和重交通能力。然而，RC-ECC 路面从未探索过常用的路面碾压 （RC） 方法。在本研究中，RC-ECC 是通过理论和实验方法开发的，用于在路面施工过程中实现压实的 ECC。首先，基于 ECC 生坯强度发展与压路机驱动应力的应力平衡方程，建立了 RC-ECC 的理论模型;随后，通过考虑砂/粘结剂比、粘结剂类型（飞灰、两种火山灰）和硫铝酸钙水泥 （CSA） 含量的实验结果验证了所提出的理论模型。相对沉降和开放时间被认为是发展 RC-ECC 的关键因素。保守地建议最大允许相对沉降在 90 min 以下为 0.1，在 90-150 min 之间为 0.05，而最小相对沉降为 0.01 以获得令人满意的压实质量。为此，最好使用专门定制的或轻型滚筒（此处为 1 吨）。需要适度的 CSA 含量来加速生坯强度的发展，同时为滚动压实保持足够的开放时间。由于其角度形态，基于火山灰的 RC-ECC 比粉煤灰 RC-ECC 表现出更长的开放时间。RC-ECC 的 MOR 比未压实的 ECC 高 14-27%，从而使路面上的厚度更薄，隐含碳更低。RC-ECC 为路面施工带来了希望;同时，与辊子选择、ECC 层厚度和轧制速度相关的更多研究值得未来的研究。