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Rapid Assessment of Air Void System in Fresh Concrete

Award Information
Agency: Department of Transportation
Branch: N/A
Contract: 6913G618C100008
Agency Tracking Number: 171FH2005II
Amount: $499,713.00
Phase: Phase II
Program: SBIR
Solicitation Topic Code: 171FH2
Solicitation Number: N/A
Solicitation Year: 2018
Award Year: 2018
Award Start Date (Proposal Award Date): 2018-05-17
Award End Date (Contract End Date): 2020-05-16
Small Business Information
16 Great Hollow Rd.
Hanover, NH 03755
United States
DUNS: 072021041
HUBZone Owned: No
Woman Owned: No
Socially and Economically Disadvantaged: No
Principal Investigator
 David Kynor
 Principal Engineer
 (603) 640-2446
Business Contact
 Michael Izenson
Title: Chief Financial Officer
Phone: (603) 640-2341
Research Institution

Proposal title: Rapid Assessment of Air Void System in Fresh Concrete

Water expansion during freeze-thaw cycles can cause deterioration in concrete, leading to scaling, cracking, and crumbling over a period of years. Resistance to this damage is achieved with a system of voids formed by adding surfactants to the fresh concrete to stabilize air bubbles naturally entrained during mixing. The volume fraction, size, and spacing of these voids are critical. It is important to verify these parameters in fresh concrete as it is delivered to the jobsite. Current pressure-based measurement methods are cumbersome, prone to error, and yield information only on total void fraction—giving no information about void size or spacing. The Creare Air Meter will provide an instant, in-situ measurement of both void fraction and size. This simple, robust, handheld wand can be inserted into any fresh concrete sample and return an accurate result at the touch of a button. This technology will enable realtime monitoring at the jobsite as the concrete is delivered, or even in the forms as it is poured. During the Phase II effort, we will produce a fieldable prototype and conduct a major study to validate its performance.

* Information listed above is at the time of submission. *

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