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:
Dec. 18, 2018
Filed:
Nov. 23, 2015
University of South Carolina, Columbia, SC (US);
Paul Henry Ziehl, Irmo, SC (US);
Mohamed K. ElBatanouny, Columbia, SC (US);
Matthew K Jones, Columbia, SC (US);
University of South Carolina, Columbia, SC (US);
Abstract
Methods of using acoustic emission (AE) as a condition assessment technique for alkali-silica reaction (ASR) in concrete are provided. ASR is a chemical reaction occurring between alkaline hydroxides within cement past and certain types of amorphous silica found in mineral aggregates. ASR causes an accumulation of internal pressure due to the formation of a hygroscopic gel which leads to expansion and cracking of the concrete. AE is highly sensitive to stress waves emitted from a sudden release of energy such as formation of cracks in concrete. This allows it to capture and identify propagating damage. AE has the potential to detect micro-cracks forming prior to expansion, which can be related to the degree of ASR damage.