Abstract: A cementitious composition which when mixed with water is capable of setting rapidly into a hard mass of high compressive strength without substantial shrinkage during setting and early hardening, which exhibits reduced long-term shrinkage, and which possesses a high degree of impermeability to liquid and vapor, is composed of a particulate mixture of portland cement, a calcined gypsum, and high alumina cement. Alternatively, such a cementitious composition can be composed of a particulate mixture of a high alumina cement and pressure calcined gypsum. Additional components such as surface active agents, gas generating or releasing agents and aggregate can be employed, if desired, for the selective improvement of specific properties.
Type:
Grant
Filed:
May 4, 1978
Date of Patent:
June 5, 1979
Assignee:
U.S. Grout Corporation
Inventors:
Robert W. Gaines, Dennison F. Fiala, Henry N. Babcock
Abstract: A cementitious composition which when mixed with water is capable of setting rapidly into a hard mass of high compressive strength without substantial shrinkage during setting and early hardening, which exhibits reduced long-term shrinkage, and which possesses a high degree of impermeability to liquid and vapor, is composed of a particulate mixture of portland cement, a calcined gypsum, and high alumina cement. Alternatively, such a cementitious composition can be composed of a particulate mixture of a high alumina cement and pressure calcined gypsum. Additional components such as surface active agents, gas generating or releasing agents and aggregate can be employed, if desired, for the selective improvement of specific properties.
Type:
Grant
Filed:
December 6, 1974
Date of Patent:
August 30, 1977
Assignee:
U.S. Grout Corporation
Inventors:
Robert W. Gaines, Dennison F. Fiala, Henry Nash Babcock