Kenneth O Daugherty

US Patent:

40024830, Jan 11, 1977

Filed:

Jun 12, 1975

Appl. No.:

5/586225

Inventors:

Kenneth E. Daugherty - Lewisville TX
John P. Luker - Comanche TX
Joseph H. Allen - Irving TX
Waldemar A. Klemm - Columbia MD

Assignee:

General Portland, Inc. - Dallas TX

International Classification:

C04B 702

US Classification:

106 89

Abstract:

An improved expansive cement composition is provided which has the increased capability of being able to " grab" steel reinforcement members therewithin as the material is curing and expanding to result in effective stressing of the reinforcement members. This cement is made of particulate argillaceous and calcareous materials, and contains from about 1 to about 70% by weight of free CaO and from about 2 to about 7% by weight of MgO uniformly distributed therein, with the remaining portion being primarily tricalcium silicate and containing substantially no dicalcium silicate. The improved expansive composition can be manufactured by subjecting a conventional Portland cement raw mix, which has been "overlimed" and which contains the added quantity of MgO, to hard burning conditions within a Portland cement kiln such that the silicate materials are reacted with lime to form tricalcium silicate but yet leave from about 1 to about 70% by weight of the free CaO, and from about 2 to about 7% by weight of the MgO in the clinker, and thereafter comminuting the clinker. The composition can be used directly as an expansive cement, or can be mixed with other cements such as Portland cements to impart expansive qualities thereto.

US Patent:

55627439, Oct 8, 1996

Filed:

Apr 12, 1995

Appl. No.:

8/420570

Inventors:

Kenneth E. Daugherty - Lewisville TX
Barney J. Venables - Denton TX
Oscar O. Ohlsson - Naperville IL

Assignee:

University of North Texas - Denton TX
Arch Development Corporation - Chicago IL

International Classification:

C10L 544
C10L 512

US Classification:

44589

Abstract:

A refuse derived fuel (RDF) pellet having about 11% or more particulate calcium hydroxide which is utilized in a combustionable mixture. The pellets are used in a particulate fuel bring a mixture of 10% or more, on a heat equivalent basis, of the RDF pellet which contains calcium hydroxide as a binder, with 50% or more, on a heat equivalent basis, of a sulphur containing coal. Combustion of the mixture is effective to produce an effluent gas from the combustion zone having a reduced SO. sub. 2 and polycyclic aromatic hydrocarbon content of effluent gas from similar combustion materials not containing the calcium hydroxide.

US Patent:

40479617, Sep 13, 1977

Filed:

Jun 10, 1975

Appl. No.:

5/585659

Inventors:

William Eugene Alderete - Irving TX
John Parke Boyer - Dallas TX
Kenneth Earl Daugherty - Lewisville TX
David Lee Johnson - Garland TX

Assignee:

General Portland, Inc. - Dallas TX

International Classification:

C04B 714

US Classification:

106 89

Abstract:

A cement of the same general characteristics of a normal Type I is provided which involves the intergrind of from 1 up to about 25 parts by weight of air-cooled iron blast furnace slag, and from over 75 up to 99 parts by weight of conventional Type I Portland clinker. Traditional set control additives, particularly such as sulfate provided through gypsum, are used in the new cement composition. It is particularly noted that the slag involved is air-cooled, as contrasted to an amorphous material obtained by water quenching. In some respects the new product is better than traditional Type I, and can thus be referred to as an improved Type I.