The author would like to thank the NIST/industry Virtual Cement and Concrete Testing Laboratory (VCCTL) consortium for funding in support of several of the enhancements to the cement hydration and microstructure development computer programs comprising CEMHYD3D v3.0. He would also like to thank Dr. Xiuping Feng (formerly a guest researcher in NIST/BFRL) for her assistance with laboratory measurements in support of the pore solution and slag reactivity additions to CEMHYD3D v 3.0.