New developments in understanding the chemistry of cement hydration

Portland cement is based on calcium silicates with lesser amounts.of calcium aluminates. Its reaction with water, which is responsible for strength development, is a complex process involving the precipitation of hydration products in colloidal gel and crystalline forms. This paper describes the microstructural development of the hydrates the structure of colloidal C—S—H gel, which is the main hydration product, the kinetics of hydration and the aqueous solution chemistry of cement pastes and pastes made with pure C3S. Theories relating to the mechanism of cement hydration are examined and these are discussed in terms of studies of the effect of accelerating and retarding admixtures for cement.

[1]  J. F. Young,et al.  A review of the mechanisms of set-retardation in portland cement pastes containing organic admixtures , 1972 .

[2]  Noreen L. Thomas,et al.  Calcium and silicon concentrations in solution during the early hydration of portland cement and tricalcium silicate , 1981 .

[3]  S. Diamond.  A critical comparison of mercury porosimetry and capillary condensation pore size distributions of portland cement pastes , 1971 .

[4]  H. Taylor,et al.  A multi-method study of C3S hydration , 1978 .

[5]  A. Hellawell,et al.  The hydration of Portland cement , 1978, Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences.

[6]  N. L. Thomas,et al.  Studies of the growth of “silicate gardens” and related phenomena , 1980 .

[7]  L. S. Wells,et al.  Study of the system CaO-SiO2-H2O at 30 C and of the reaction of water on the anhydrous calcium silicates , 1934 .

[8]  J. E. Bailey,et al.  On the hydration of Portland cement , 1978, Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences.

[9]  P. Barret,et al.  Filter dissolution of C3S as a function of the lime concentration in a limited amount of lime water , 1980 .

[10]  J. Birchall,et al.  Some general considerations of a membrane/osmosis model for portland cement hydration , 1980 .

[11]  R. Aldous.  The hydraulic behaviour of rhombohedral alite , 1983 .

[12]  N. L. Thomas,et al.  The effect of lead nitrate on the early hydration of portland cement , 1981 .

[13]  M. Collepardi,et al.  Morphology and surface properties of hydrated tricalcium silicate pastes , 1972 .

[14]  S. Brunauer,et al.  Pore structure analysis without a pore shape model , 1967 .

[15]  C. Windsor,et al.  A small-angle neutron scattering study of cement porosities , 1982 .

[16]  M. Daimon,et al.  Morphological study on hydration of tricalcium silicate , 1971 .