Methods of Clinker Phase Composition Determination

Clinker phase composition has decisive influence on several properties of cement paste, thus also on concrete. The most important are the following  

According to Taylor [218] Bogue s formitlae give to low values in the case of alite and tricalcium aluminate, too high for belite and relatively correct for ferrite phases. More close to reahty results can be obtained with modified by Taylor [218] Bogue s formulae, which take into account the presence of minor components solid solutions in clinker phases. Taylor simplifying assumed that in clinker phases the quantity of minor components are on the level given in Table 2.17. 

The calculation procedure is as follows. According to Bogue calculation CaO content must be corrected for free hme and bond in sulphates or CaCOj. Then, if there is no more accurate data, it can be assumed that 67 % of insoluble residue is composed of Si02 and 33 % of AI2O3. 

Alite is forming usually hexagonal crystals, seldom of the trapezohedron or rhombohedron habitus [221] (Fig. 2.69). This morphology is depending from the 

Behte crystals can form clusters in the places occupied by qirartz grains, and in their core the typical hole can be present (Fig. 2.76). On the quartz grain initially 

---