Stoichiometry of slag cement hydration

Comparison of the average proportions, compositions and densities of the phases present in the material formed in situ from the slag with correspond- 

For any specified drying condition, the calculated water contents arc lower and the porosities higher than those of pure Portland cement pastes, and this appears to be true in varying degrees of composite cements in general. Experimental observations support this conclusion. Non-evapor-able water contents of 2-year-old pastes of w/s ratio 0.5 typically decrease with slag content from around 23% for pure Portland cements to 10 13 for cements with 90% of slag (C42). For the paste to which Table 9.4 refers, the observed non-evaporable water content was 17.7% (H49). Porosities and their relations to physical properties are discussed in Section 9.7. 

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