Interfacial Transition Zone (ITZ) between aggregate particles and cement paste in an old concrete was studied by scanning electron microscope (SEM), electron probe X ray micro analyzer (EPXM) and the energy dispersive X ray analyzer (EDXA).

• 利用扫描电子显微镜 (SEM)、电子探针 (EPXM)和电子能谱仪 (EDXA)对骨料颗粒和水泥浆体界面过渡区 (ITZ)进行了研究。