An apparatus for high capacity production of high-fluidity, colloidally mixed cement slurry. Water and cement dust are combined at metered rates by a premixing assembly which discharges into a mixing tub. The high-speed, high-shear pump recirculates the material through the tub to produce...http://www.google.com.au/patents/US5795060?utm_source=gb-gplus-sharePatent US5795060 - Method and apparatus for continuous production of colloidally-mixed cement slurries and foamed cement grouts 
