The mechanical properties of cement-bonded particleboards, for which cement at ambient temperature (<30 'C) and heated cement of up to 80 'C, respectively, was employed for laboratory-production using the hot-press technology, could only marginally be elevated with the use of sodium water glass, which is normally used for the production of cementbonded particleboards using the cold-press technology.
Among the water soluble substances tested as accelerators, Substitute D achieved a prominent rank. It acted both as an inhibitor during and after mixing of the components and as an accelerator during hot-pressing (double function). Therefore it is possible to improve the mechanical Performance of cement-bonded particleboards on the one hand and on the other hand to compensate strength-losses during their production – especially at higher cement – or ambient temperatures, respectively. It can be assumed the use of Substitute D positively affects itself in place of lithium carbonate on the operating result with the production of cement chip boards. Further research is necessary to investigate to what extent Substitute D can be used with the cold-press technology.