AUTHOR=Wang Lei , Chen E. , Ruan Shaoqin , Tang Shengwen TITLE=Editorial: New Technologies for Investigating Microstructures and Enhancing Performance of Cementitious Materials JOURNAL=Frontiers in Materials VOLUME=8 YEAR=2021 URL=https://www.frontiersin.org/journals/materials/articles/10.3389/fmats.2021.669862 DOI=10.3389/fmats.2021.669862 ISSN=2296-8016