According to International Programme on Chemical Safety (IPCS), density of Portland Cement is: 2.7 – 3.2 g/cm³. source: IPCS
Young’s modulus or elastic modulus (E): ≈ 50 GPa. Source: E-modulus
Acknowledgement: Thanks go to Mr. Volker Mintzlaff, Martin-Luther University Halle-Wittenberg.