MCI Lab & Field Testing Andrea Hansen Jessi Meyer Matt Drew

Agenda Lab Testing –ASTM G109 –Modified ASTM G109 (Cracked Beam Test) –GC –XPS Field Testing –Wet Mix Testing –Alkalinity –QAC –XPS –GalvaPulse (others) –Fugitive Dye Option

ASTM G109 Standard test method for determining the effects of chemical admixtures on the corrosion of embedded steel reinforcement in concrete exposed to chloride environments.

Cracked Beam Testing Modified ASTM G109 Includes crack as part of initial test set up More true to “real life” More aggressive/faster test method

Gas Chromatography (GC) A separation technique carried out in a packed column. Each peak on the recorder signifies a certain chemical.

Gas Chromatography (GC)

X-Ray Photoelectron Spectroscopy Performed on: –MCI 2020 –MCI 2020 M –MCI 2022 –MCI 2021 Shows MCI actually absorbed onto steel reinforcement Confirmed ability of MCI to displace chlorides.

MCI Slides

XPS analysis after 450 days, Mass Concentration % Sample Etch Time (seconds) Fe 2pO 1sC 1sN 1sCl 2pCa 2pSi 2p Untreated Untreated Untreated Inhibitor A Inhibitor A Inhibitor A Inhibitor B Inhibitor B Inhibitor B

Detection of NS Admixtures in Wet Concrete HACH Silica Test Kit –Model SI-5, Ranges and 0-800mg/L “Wet samples” of concrete –Control –MCI-2005 NS or MCI NS

Gecor 6 - James Instruments Measures RH, temp, HCP, and concrete resistivity Non-destructive polarization technique 100 readings can be stored at a time Weighs 9 pounds Photo from James Instruments Inc Website

GalvaPulse - Germann Instruments Linear Polarization Resistance Half Cell Potentials Smaller and faster than Gecor 6

Galva Pulse Photo from Galva Pulse Manual

Galva Pulse Corrosion Current, µA/cm2 Corrosion Rate, µm/year Corrosion Level Time to Visible Deterioration < 0.5< 5.8PassiveN/A 0.5 to 55.8 to 58Low> 10 years 5 to 1558 to 174Moderate3 to 10 years > 15>174High< 2 years Corrosion rates by Thomas Frolund, 2002 (with GalvaPulse instrument) Chart from GalvaPulse Manual

LPR Corrator Probes - Rohrback Cosasco Systems Photo from Corrator Website Linear Polarization Resistance Electrical Resisitivity Temperature sensor

Model 800 Monitoring Devices Photos from Corrator Website Monitor via small test instruments or remote data collection More Automated CorrData Instruments

Humidity Testing ASTM-F-1869 ASTM-F-2170 ASTM-D-4263 Photo from James Instruments Website

Depth of Carbonation Deep Purple Indicator, German Instruments, Inc. Rainbow Indicator, Germann Instruments, Inc Photos from German Instruments Website

Depth of Carbonation James Instruments, Inc. Carbo Detect ASR Detect Photo taken from German Instruments Website

Sample Preparation

Alkalinity HACH Alkalinity Test –Model AL-AP MG-L –5-400 mg/L –Catalog # Alkalinity Treated > Alkalinity Control

QAC Test EM Quant Test Strips –0-500 mg/l –Cat. #

Equipment & Test Firms Test Firms American Engineering & Testing, MN H.C. Nutting, OH CTL, IL, MD, NH WJE, 20 Offices NDT Equipment Germann Instruments James Instruments Durham Geo Slope Indicator Elcometer Instruments Humboldt Manufacturing