These fractal dimensions were found to be statistcally correlated with the degree of hydration and thus could be used as characteristic parameters.With Shadow you can add perspective correct shadows in front of or behind a layer. This number is called the fractal dimension. The morphology of the different products of hydration observed in cement microstructure was associated with a single number. Finally, the cement microstructure was characterised using the theory of Fractals. This model uses modified conceptual equations based on the classical theory of nucleation and diffusion growth which have been used to describe the development of compressive strength. A model to predict the degree of hydration was developed in this research work. The degree of hydration obtained with backscattered imaging is comparable to the degree of hydration obtained with traditional techniques such as thermogravimetric analysis and specific gravity measurements. A new method to calculate the degree of hydration using backscattered imaging is proposed. The hydrated cement products were quantified with backscattered imaging and the degree of hydration was obtained from this study. These predictive models will form the basis for predicting properties related to the performance and durability of concrete. The hydrated cement products and porosity of the pastes are quantified with the object of developing quantitative models to predict the degree of hydration with relation to the age of the cement paste. This research presents a study of the characterisation of hydrated cement. The current literature indicates that new experimental techniques and methods have been developed for the characterisation of the cement microstructure. The study of cement microstructural parameters such as total porosity, pore size distribution and nature and amount of hydrated products as well as the engineering properties such as permeability, absorption and diffusion have been the main concern of researchers who intended to improve the durability of concrete. These characteristics are influenced by the mixing and curing conditions, particularly the w/c ratio, the curing temperature and the relative humidity, and the degree of hydration. Properties such as permeability and diffusion depend on the microstructural characteristics of hydrated cement. The durability of concrete is intrinsically related to the properties of the cement paste present in a concrete element.

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