Patent ID: 7241338
Filing Date: 2007-07-10
Classification: C04B,Y02W

Abstract:
1. A pumpable and sprayable, fiber-reinforced, strain hardening hydraulically settable mortar comprising a) at least one of portland cement or pozzolanic cement, b) a strain hardening amount of matrix-interactive reinforcing fibers within the range of 0.1 to less than 4.0 volume percent relative to the volume of the mortar, said matrix interactive reinforcing fibers having a length of from about 4 mm to about 30 mm, a fiber diameter between 10 μm and 150 μm, a modulus of elasticity between 10 GPa and 300 GPa, an interface frictional stress between 0.5 and 3.0 MPa, and interfacial chemical bonding between 0.1 J/m c) at least one non-Newtonian additive selected from the group consisting of calcium aluminate cement and organic non-Newtonian associative thickeners, such that the mortar viscosity during pumping and spraying is lower than the viscosity at low shear: d) water in a weight ratio of 0.2:1 to 0.6:1 based on the weight of the hydraulically settable cement fraction; e) a superplasticizer in an amount of 0.1 weight percent to about 10 weight percent based on the weight of the sprayable and pumpable mortar; f) a viscosity control agent in an amount of from 0.1 weight percent to about 5 weight percent based on the weight of the pumpable and sprayable mortar.