Articles formed by extruding hydraulically settable compositions

Details Articles formed by extruding hydraulically settable compositions Articles formed by extruding hydraulically settable compositions

1995-06-07

1997-08-19

McCamish, Marion E.

Stock material or miscellaneous articles

Hollow or container type article

Glass, ceramic, or sintered, fused, fired, or calcined metal...

2065246, 2065247, 4283124, 4283179, 428703, B32B 1300, B32B 1302

Patent

active

056586248

ABSTRACT:
Hydraulically settable mixtures and methods for extruding such mixtures into a variety of objects which are form-stable in the green state are disclosed. High green strength is achieved by increasing the yield stress of the mixture while maintaining adequate extrudability. Optimizing the particle packing density while including a deficiency of water yields a hydraulically settable mixture which will flow under pressures typically associated with the extrusion of clay or plastic. In addition, a rheology-modifying agent can be added to increase the yield stress of the mixture while not significantly increasing the viscosity. The desired strength properties and other performance criteria of the final hardened extruded product are controlled by adding aggregates, fibers, a hydraulically settable binder, water, and other admixtures.

REFERENCES:
patent: 4353748 (1982-10-01), Birchall et al.
patent: 4410366 (1983-10-01), Birchall et al.
Young, J. Francis, "Marco-Defect-Free Cement: A Review", Mat. Res. Soc. Symp. Proc. vol. 179, pp. 101-121, 1991.

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