The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 03, 1989
Filed:
Jun. 01, 1987
Applicant:
Inventors:
Earl W McDaniel, Oak Ridge, TN (US);
Terry L Sams, Oak Ridge, TN (US);
Othar K Tallent, Oak Ridge, TN (US);
Assignee:
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G21F / ; C04B / ; C04B / ; C04B / ;
U.S. Cl.
CPC ...
252628 ; 106 89 ; 106 97 ; 106118 ;
Abstract
A composition and related process for disposal of hazardous waste streams containing fluoride in cement-based materials is disclosed. The presence of fluoride in waste materials acts as a set retarder and as a result, prevents cement-based grouts from setting. This problem is overcome by the present invention wherein calcium hydroxide is incorporated into the dry-solid portion of the grout mix. The calcium hydroxide renders the fluoride insoluble, allowing the grout to set up and immobilize all hazardous constituents of concern.