abbindungsverzoegerer containing magnesium phosphate fast abbindende - zementzusammensetzungen.

摘要

Improved magnesium phosphate fast-setting cementitious compositions containing an oxy-boron compound. These compositions form a hardened mass when water is added at ambient temperatures. The incorporation of the oxy-boron compound within these compositions retards the initial setting time, increases the early compressive strength ot the resulting hardened mass by allowing a reduced amount of water to be added to the compositions. These compositions include a solid activator containing a P2O5 material. e.g. ammonium phosphate fertilizer, absorbed onto a porous material, e. g. diatomaceous earth.