Rajeshkumar M Patel

US Patent:

8349072, Jan 8, 2013

Filed:

Jan 11, 2011

Appl. No.:

13/004303

Inventors:

Glenn Schumacher - Pasadena MD, US
Rajeshkumar Patel - Catonsville MD, US

Assignee:

CeraTech, Inc. - Alexandria VA

International Classification:

C04B 24/06
C04B 24/04
C04B 28/08
C04B 7/12

US Classification:

106708, 106823

Abstract:

Cementitious compositions in which the cementitious properties of fly ash are carefully controlled are described. The cementitious compositions may be substantially free harsh acids and bases such as citric acids (≈pH 2. 2) and alkali metal activators including alkali hydroxides (≈pH 12-14) and metal carbonates (≈pH 11. 6). The use of these harsh chemicals creates acid base reactions during use of the products. Instead of these harsh chemicals, a lactic acid salt based activator is be used as a reaction accelerator. Boric compounds may be used as a retarder in the compositions.

US Patent:

20130160678, Jun 27, 2013

Filed:

Jan 4, 2013

Appl. No.:

13/734732

Inventors:

Glenn SCHUMACHER - Pasadena MD, US
Rajeshkumar PATEL - Catonsville MD, US

International Classification:

C04B 24/06

US Classification:

106708

Abstract:

Cementitious compositions in which the cementitious properties of fly ash are carefully controlled are described. The cementitious compositions may be substantially free harsh acids and bases such as citric acids (≈pH 2.2) and alkali metal activators including alkali hydroxides (≈pH 12-14) and metal carbonates (≈pH 11.6). The use of these harsh chemicals creates acid base reactions during use of the products. Instead of these harsh chemicals, a lactic acid salt based activator is be used as a reaction accelerator. Boric compounds may be used as a retarder in the compositions.