**2. Experimental**

The cement compositions used in the study were formulated from an aluminosilicate component selected from a typical metakaolin and two type F fly ashes (380m<sup>2</sup> /kg by Blaine) (**Table 1**) and soluble sodium silicates (M = 2.8 and density = 1400 kg/m<sup>3</sup> ) as an alkaline component. In some cases sodium hydroxide and silica fume were added as supplementary components. In the experiments on thermal behaviour exclusively in the tests held at high temperatures, a ground chamotte with a specific surface area = 410 m<sup>2</sup> /kg by Blaine was used as filler. After curing in an air tight mould at 80°C until solidification, the specimens were then were subjected for 6 hr- curing: in autoclave at 174°C, in steam curing chamber at 80°C, and in drying chamber at 80, 150, and 220°C. The structure formation processes at


**Table 1.**

*Chemical composition of raw materials.*

*Genesis of Structure and Properties of the Zeolite-Like Cement Matrices of the System… DOI: http://dx.doi.org/10.5772/intechopen.97520*

high temperatures were studied on the specimens that then additionally cured for 4 hrs within a temperature interval of 600–1200°C. An interrelation between mechanical properties determined on the specimens of size 2 2 2 cm and the results of examination of a phase composition studied by means of XRD, DTA, and SEM techniques was established.

On the contrary to a traditional approach, under which changes in a pH-value and an aluminosilicate component to alkaline solution ratio were taken as variables, an approach applied in this study was based on a ratio between the main constituent oxides in a reacting mix (mainly, SiO2/Al2O3); it makes more easier to understand the structure formation processes with regard to peculiarities of a synthesized microstructure.
