X-ray diffraction patterns of hardened cement paste after after 28 days. 1Hs addition content accounts for 0 % (1); 5 % (2); 15 % (3). Notes: CH – portlandite; A – alite; K – calcium silicate hydrate; D – belite; E – ettringite; CC – calcite; G – calcium aluminum silicate hidrate, S – sodium aluminum silicate hidrate, Af – monosulfoaluminate