Nondestructive Concrete Characterization System

Award Information
Agency:
Department of Defense
Branch
Army
Amount:
$99,997.00
Award Year:
2012
Program:
STTR
Phase:
Phase I
Contract:
W911NF-12-C-0088
Agency Tracking Number:
A12A-013-0341
Solicitation Year:
2012
Solicitation Topic Code:
A12a-T013
Solicitation Number:
2012.A
Small Business Information
Troxler Electronic Laboratories
3008 Cornwallis Rd, Research Triangle Pa, NC, 27709-
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
003184322
Principal Investigator:
Robert Troxler
Dir of Advanced Technologies
(919) 485-2240
rtroxler@troxlerlabs.com
Business Contact:
William Troxler
President, CEO
(919) 485-2200
btroxler@troxlerlabs.com
Research Institution:
NCSU
Steve Shannon
Dept. of Nuclear Engineering
1110 Burlington Eng. Labs
Raleigh, NC, 27695-
(919) 515-2301
Nonprofit college or university
Abstract
Currently nuclear-based gauges are the most widely used equipment in the construction industry to measure moisture and density of pavement materials. Such measurements are very accurate, rapid, and non-destructive. Attempts to replace these nuclear methods by non-nuclear methods have shown strong limitations. For this project, we propose to integrate nuclear and seismic technologies to measure the engineering characteristics of concrete such as strength and thickness based on elemental analysis, density, and modulus. The method relies on nuclear neutron induced gamma ray spectroscopic analysis techniques to obtain hydrogen content, water-to-cement ratio (W/C ratio), density, and atomic fingerprints, and seismic wave propagation to obtain modulus, thickness in situ. It is nondestructive and although not instantaneous, is relatively fast. A series of tests and comparisons are to be performed authenticating the theory and a practical method and apparatus is proposed. The proposed system relies on nuclear backscatter techniques and surface wave measurements for nondestructive analysis. Signal processing techniques are incorporated to optimize the solutions and classify the concrete material aiding field analysis of concrete structures. The proposed method is portable and designed for low power consumption. Commercialization possibilities include quality control and maintenance diagnostics of walls, piers, bridges, tunnels and roads.

* information listed above is at the time of submission.

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