Page 29 - RoadCem Manual - PCT BV

Figure 2.6 Simulated expressions of the hydration reactions and associated “wrapping” crystallization effect.
The “wrapping” effect associated with the crystalline products of the hydration reactions, which continue with time are in effect also responsible for the ability of RoadCem modified cement to bind even heavy clays. With cement alone this cannot be done successfully.
The same is true for the binding of other previously non bondable materials such as sludge and different waste streams. In addition to the above, due to the composition of RoadCem, other processes also occur simultaneously and especially with clays and similar materials mainly through cat ion and anion exchange and replacement and charge neutralization as indicated in figure 2.7.
Figure 2.7 Replacement and charge neutralization.
Ion substitution and Charge modification for improved binding of charged particles and increased cat ion exchange capacity also result. Electrochemistry change is induced by addition of RoadCem. It makes it possible to bind different materials even in acidic environments and when combined with the “wrapping effect” this leads to a product which has superior characteristics and performance in accord with the requirements.
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