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					Iowa - Winter 2009/10
     Salt Brine in Iowa

• How Long
• Why
• Experiences –
  Ours and others!
• Moving Forward
      IDOT Snapshot (2004-2005)

•   Salt used- 185,682 tons
•   Salt used per lane mile- 7.67 tons
•   Salt brine used- 10,061,969
•   Sand used- 8,850 tons
•   Calcium Chloride- 53,691 gallons
•   Statewide average snowfall- 19
      IDOT Snapshot (2009-2010)

•   Salt used- 244,828 tons
•   Salt used per lane mile- 9.84 tons
•   Salt brine used- 17,990,565
•   Sand used- 41,106 tons
•   Calcium Chloride- 81,906 gallons
•   Statewide average snowfall- 31.5
    2009 Annual cost to produce 100,000
           gallons of salt brine
            (assume 3,500 gal per hour)

•   Labor @ $25/hr              $725
•   Building                     875
•   Water                        775
•   Salt                         1325
•   Electricity                  750
•   Storage tanks                 60
•   Brine maker                  750
•   Total annual cost           $5,260

• Cost per gallon               $0.0526
         Application Rates and Guides

                     Salt Brine

•   Frost treatment- 30 gal per ln/ml (113.6 litres/km)
•   Anti-icing- at least 50 gal per ln/ml (197 litres/km)
•   *Blended – reduce rates by 20%
•   Pavement temperature -15F (10F*)and rising
•   Do not apply if winds are forecasted to be above
    15 mph per hour when loose snow is present (IDOT)
•   Weather forecast is trigger for application
Making Salt Brine
WDM Brine Maker
Brine Storage Tanks
St. Cloud, MN
          Blending Salt Brine

• Add tools to your
    arsenal
•   Improved residual
    value
•   Reduces Corrosion
•   Lower working
    temperatures
     Chemicals in the “Blend”

                     Very low cost


• SALT BRINE         Dries quickly
                     Very effective at pavement temperatures
                     above 20° F
                     Readily available


• CALCIUM            Fairly low cost

 CHLORIDE            Very effective at low temperatures
                     Exothermic
                     Hydroscopic



• DE-ICE 55/Fusion   Effective at low temperatures

 (Beet Juice)        Great residual effect
                     Non-Chloride
                     Corrosion Inhibitor
                   “SUPER MIX”


             Components


Salt Brine         80%
Calcium Chloride 10%
De-Ice 55          10%
 USING SUPER MIX IN ANTI-ICING



PRO-ACTIVE
TREATMENT
 PRIOR TO
 AN EVENT
Salt Brine 24 Hours After
       Application
Salt Brine 48 Hours After
       Application
SUPERMIX - AFTER ONE WEEK
                     SUPER MIX
                   PERFORMANCE
                       PRE – WET APPLICATIONS
                     FEBRUARY 4TH AND 5TH 2005




A SUNDAY MORNING, PAVEMENT    WET PAVEMENT       PAVEMENT TEMP. F
   TEMP. 5 DEGREES AT 7AM                          MIX WORKING
DE-ICING
3-29-09 STORM




7 INCHES OF WET SNOW
   Using straight liquids
Same storm, rural area also using straight
                liquids




                3-29-09 STORM
     Tested Blends

85 % Salt      80% Salt       87% Salt
Brine          Brine          Brine
10 % GeoMelt   15 % GeoMelt   10% GeoMelt
5 % Calcium    5 % Calcium    3% Calcium
80% Salt       80% Salt       83% Salt
Brine          Brine          Brine
10% GeoMelt    20% GeoMelt    13% GeoMelt
10% Calcium                   2% Calcium
80% Salt     50% Salt         More to
Brine        Brine            Come!
12 % GeoMelt 50% GeoMelt
8 % Calcium
L
a
b

T
e
s
t
i
n
Swedish
Visitors
               Argentina




Tastes Great/Less Filling!
   THE TRIP
February – March
      2008




   WE SAW
AND WE LEARNED
EXPERIMENTAL SALT BRINE PLANT
•ADDITION OF CALCIUM
CHLORIDE
                    ANALISYS IN OUR LABS.

                                                BRINES
                                              Cloruro de
                                                  Calcio                80% NaCl /                 90% NaCl /
                     Sal Natural                   puro                    20%CaCl2                  10%CaCl2
                    09/03/20
Fecha                     09   09/03/2009   10/03/2009   10/03/2009   12/03/2009   12/03/2009   12/03/2009   12/03/2009



Densidad (gr/mL)    1,197      1,197        1,183        1,183        1,122        1,122        1,149        1,149

pH                     9           9           11           11            9            9           11           11

Temperatura (ºC)      23          23           50           50           25           25           25           25
Punto de
   congelaminento
   (ªC)             -13,1       -12,6         -25          -24         -15,4        -15,1        -14,0        -14,2

Cloruros (g/L)      39,2        37,8           39         39,4
CDOT’s Latest Research
       Project
  The
Future!

				
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posted:8/14/2011
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