Materials and Structures

, Volume 49, Issue 4, pp 1105–1114 | Cite as

Study of aluminum sulfate and anhydrite on cement hydration process

Original Article


The influences of aluminum sulfate (AS) introduction and dosage on setting time, hydration heat evolution, hydration product type and pore structure of Portland cement were studied, and the influence of AS on concrete strength was investigated also. The results indicate that AS can effectively accelerate setting time of Portland cement and enhance concrete at early age (1 day) strength. AS can promote hydration process of calcium aluminate but inhibit that of calcium silicate. The effect of AS on hydration process becomes more significant along with the increased dosage; and the introduction of AS can promote the formation of AFt. The research results of this paper favor the opinion of the existence of AFt precursor; and the AFt precursor is amorphous AFm which could not be identified by XRD. With anhydrite as setting regulator, the amorphous AFm retention time is prolonged, and the endothermal peaks produced by amorphous AFm during DSC–MS measurement correspond to 80–160 and 830–910 °C, losing H2O and SO2 respectively.


Cement Aluminum sulfate Anhydrite Hydration AFt Amorphous AFm MS 


  1. 1.
    Cheung J, Jeknavorian A, Roberts L et al (2011) Impact of admixtures on the hydration kinetics of Portland cement. Cem Concr Res 41(12):1289–1309CrossRefGoogle Scholar
  2. 2.
    Prudencio LR Jr (1998) Accelerating admixtures for shotcrete. Cem Concr Compos 20(2):213–219CrossRefGoogle Scholar
  3. 3.
    Heikal M (2004) Effect of calcium formate as an accelerator on the physicochemical and mechanical properties of pozzolanic cement pastes. Cem Concr Res 34(6):1051–1056CrossRefGoogle Scholar
  4. 4.
    Şahmaran M, Özkan N, Keskin SB et al (2008) Evaluation of natural zeolite as a viscosity-modifying agent for cement-based grouts. Cem Concr Res 38(7):930–937CrossRefGoogle Scholar
  5. 5.
    Janotka I, Puertas F, Palacios M et al (2010) Metakaolin sand–blended-cement pastes: rheology, hydration process and mechanical properties. Constr Build Mater 24(5):791–802CrossRefGoogle Scholar
  6. 6.
    Pourchet S, Regnaud L, Perez JP et al (2009) Early C3A hydration in the presence of different kinds of calcium sulfate. Cem Concr Res 39(11):989–996CrossRefGoogle Scholar
  7. 7.
    Paglia C, Wombacher F, Böhni H (2001) The influence of alkali-free and alkaline shotcrete accelerators within cement systems: I. characterization of the setting behavior. Cem Concr Res 31(6):913–918CrossRefGoogle Scholar
  8. 8.
    DiNoia TP, Saandberg PJ (2004) Alkali free shotcrete accelerator interactions with cement and admixture, shotcrete: more engineering developments. Taylor & Francis, London, pp 137–144Google Scholar
  9. 9.
    Maltese C, Pistolesi C, Bravo A et al (2007) Effects of setting regulators on the efficiency of an inorganic acid based alkali-free accelerator reacting with a Portland cement. Cem Concr Res 37(4):528–536CrossRefGoogle Scholar
  10. 10.
    Taylor HFW (1997) Cement chemistry, 2nd edn. Thomas Telford, London, pp 150–225CrossRefGoogle Scholar
  11. 11.
    Bullard JW, Jennings HM, Livingston RA et al (2011) Mechanisms of cement hydration. Cem Concr Res 41(12):1208–1223CrossRefGoogle Scholar
  12. 12.
    Quennoz A, Scrivener KL (2012) Hydration of C3A–gypsum systems. Cem Concr Res 42(7):1032–1041CrossRefGoogle Scholar
  13. 13.
    Bensted J (1982) Effects of the clinker–gypsum grinding temperature upon early hydration of Portland cement. Cem Concr Res 12(3):341–348CrossRefGoogle Scholar
  14. 14.
    Minard H, Garrault S, Regnaud L et al (2007) Mechanisms and parameters controlling the tricalcium aluminate reactivity in the presence of gypsum. Cem Concr Res 37(10):1418–1426CrossRefGoogle Scholar
  15. 15.
    Bhatty JI (1991) A review of the application of thermal analysis to cement-admixture systems. Thermochim Acta 189(2):313–350CrossRefGoogle Scholar
  16. 16.
    Ramachandran VS (1988) Thermal analyses of cement components hydrated in the presence of calcium carbonate. Thermochim Acta 127:385–394MathSciNetCrossRefGoogle Scholar
  17. 17.
    Plowman C, Cabrera JG (1984) Mechanism and kinetics of hydration of C3A and C4AF. Extracted from cement. Cem Concr Res 14(2):238–248CrossRefGoogle Scholar
  18. 18.
    Abdelrazig BEI, Bonner DG, Nowell DV et al (1989) Estimation of the degree of hydration in modified ordinary Portland cement pastes by differential scanning calorimetry. Thermochim Acta 145:203–217CrossRefGoogle Scholar
  19. 19.
    Ramachandran VS (1972) Elucidation of the role of chemical admixtures in hydrating cements by DTA technique. Thermochim Acta 4(3):343–366CrossRefGoogle Scholar
  20. 20.
    Kovler K (1998) Setting and hardening of gypsum–Portland cement–silica fume blends, part 2: early strength, DTA, XRD, and SEM observations. Cem Concr Res 28(4):523–531CrossRefGoogle Scholar
  21. 21.
    Odler I, Wonnemann R (1983) Effect of alkalies on Portland cement hydration: I. Alkali oxides incorporated into the crystalline lattice of clinker minerals. Cem Concr Res 13(4):477–482CrossRefGoogle Scholar
  22. 22.
    Pane I, Hansen W (2005) Investigation of blended cement hydration by isothermal calorimetry and thermal analysis. Cem Concr Res 35(6):1155–1164CrossRefGoogle Scholar

Copyright information

© RILEM 2015

Authors and Affiliations

  1. 1.Department of Civil EngineeringTsinghua UniversityBeijingChina
  2. 2.Department of Civil, Construction and Environmental EngineeringIowa State UniversityAmesUSA
  3. 3.Technology Center of China Railway Tunnel Co., LtdLuoyangChina

Personalised recommendations