Broad Spectrum Absorption-Fluorescence Method for Determining Adsorption Capacity of Fly Ash

Award Information
Agency: Department of Transportation
Branch: N/A
Contract: DTRT5717C10191
Agency Tracking Number: 171FH1002
Amount: $99,998.00
Phase: Phase I
Program: SBIR
Solicitation Topic Code: 171FH1
Solicitation Number: DTRT5717RSBIR1
Timeline
Solicitation Year: 2017
Award Year: 2017
Award Start Date (Proposal Award Date): 2017-05-30
Award End Date (Contract End Date): 2017-11-29
Small Business Information
3645 Kennesaw N Industrial Pkwy., Kennesaw, GA, 30144-1234
DUNS: 025261269
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Yongjun Chen
 Sr. Project Engineer
 (771) 745-5693
 yongjun@phosphortech.com
Business Contact
 Hisham Menkara
Title: Vice President
Phone: (404) 664-5008
Email: hisham@phosphortech.com
Research Institution
N/A
Abstract
Interference of unburned and activated carbon in fly ash with air-entraining admixtures (AEA’s) in fresh concrete mixtures is a major concern in the concrete industry. Therefore, a rapid and accurate measurement of adsorption capacity of fly ash is of great interest to this industry. In this project, a new method is suggested, which can qualitatively and quantitatively measure different surfactants and air-entraining admixtures (AEA’s) adsorbed on fly ash in concrete. Various surfactants (AEA’s) with different fluorescence emission wavelengths and absorbance wavelengths will be demonstrated. By regression analysis of concentrations of various surfactants (AEA’s) to fluorescence and absorbance intensity, new mathematical models of air-entraining admixtures vs. fluorescence intensity or absorbance intensity will be established. Excellent performance of the new method, including large linear range of air-entraining admixture concentration, high sensitivity and selectivity, good repeatability and accuracy, will be confirmed.

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

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