Comparison of The Compressive Strength and The Microstructure of Metakaolin Metastar and Metakaolin Bangka as Additive in Ordinary Portland CementSotya Astutiningsih, Widyaningsih Sura and Ahmad ZakiyuddinE3S Web Conf., 67 (2018) 03023DOI: https://doi.org/10.1051/e3sconf/20186703023