Cement asphalt emulsion composites (CAEC) are gradually being valued by pavement researchers because of its environment-friendly properties. However, there are still great difficulties in producing high-performance CAEC at present. Dolomite powder (DLM) has been proved in providing promising improvement effects on cement-based materials as an auxiliary cementitious material. Therefore, DLM was introduced into CAEC in this work for the purposes of improving the properties of CAEC. The hydration characteristics, pore structure, mechanical properties, flexural properties, work performance and volume stability of CAEC were thoroughly studied and discussed. Results show that DLM can increase the early hydration rate of cement according to the fact of the left shift of the heat flow peak of CAEC with DLM. However, the increase in the proportion of cement replaced by DLM is the key factor for the reduction of the cumulative hydration heat and the deterioration of the mechanical properties of CAEC. In addition, DLM can reduce the fluidity of CAEC due to its high specific surface area and the apparent angularity surface. Besides, DLM can refine the pore structure and improve the volume stability of CAEC because of the expansion stress provided by brucite and the filling effect of the micro powders. In general, 8%–12% of DLM is recommended as the optimal dosage in CAEC considering the pore structure characteristics, mechanical properties, flexural properties and volume stability of CAEC.

水泥沥青乳液复合材料（CAEC）由于其环保性能逐渐受到路面研究人员的重视。但是，目前生产高性能CAEC还存在很大的困难。白云石粉（DLM）已被证明作为辅助胶凝材料对水泥基材料具有良好的改进效果。因此，在这项工作中将 DLM 引入 CAEC 以改善 CAEC 的性能。对CAEC的水化特性、孔结构、力学性能、弯曲性能、工作性能和体积稳定性进行了深入研究和讨论。结果表明，DLM可以增加早期水合作用根据 CAEC 与 DLM 的热流峰值左移的事实，水泥的速率。但DLM替代水泥比例的增加是累积水化热降低和CAEC力学性能恶化的关键因素。此外，DLM 由于其高比表面积和明显的棱角表面，可以降低 CAEC 的流动性。此外，由于水镁石提供的膨胀应力和微粉的填充作用，DLM可以细化孔结构，提高CAEC的体积稳定性。一般来说，考虑到CAEC的孔结构特征、力学性能、弯曲性能和体积稳定性，推荐8%~12%的DLM作为CAEC的最佳用量。