Title: Winter Maintenance Operations Deicers Tony Myhra 8003467237 www'cryotech'com NAACCMA DVD Available
1 Winter Maintenance Operations -
Deicers
Tony Myhra - (800)346-7237
www.cryotech.com
NAAC/CMA DVD Available
2Tony Myhra - (800)346-7237 www.cryotech.com NAAC/
CMA DVD Available
3Deicing Chemicals Available
- Sodium chloride
- Magnesium chloride
- Calcium chloride
- Potassium chloride
- Combinations of all of the above
- Some with inhibitors packages
- Calcium magnesium acetate (CMA)
- Potassium acetate (CF7)
- Anhydrous sodium acetate (NAAC)
4Sodium ChlorideNaCl
- Working temperature - 20F (-7C)
- Eutectic temperature - -6F (-21C)
- Granular - Solid crystal in form
- Can be liquefied to a 23 solution
- Rate of application 200-500/LM
- Can be mixed with abrasives
- Most common deicer
5Magnesium ChlorideMgCl2
- Working temperature - 5F (-15C)
- Eutectic temperature - -28F (-33C)
- Granular hydroscopic
- Liquid to a 25 - 35 solution
- Rate of liquid application 15-35 GAL/LM
- Deice anti ice - prewet
- Aggressive corrosion
- Requires periodic agitation weekly or daily
6Calcium ChlorideCaCl2
- Working temperature - -25F (-31C)
- Eutectic temperature - -51F (-45C)
- Pellet, flake, granular - hydroscopic
- Liquid to a 25 - 35 solution
- Rate of liquid application 15-25 GAL/LM
- Deice anti-ice pre wet
- Requires daily agitation
- Aggressive Corrosion
- Hard on leather shoes and gloves
7Potassium ChlorideKCl
- Working temperature - 25F (-4C)
- Eutectic temperature - 5F (-15C)
- Solid crystal in form
- Rate slightly higher than NaCl
- Deicer mostly commercial use
8Calcium Magnesium Acetate (CMA)
- Working temperature - 20F (-7C)
- Eutectic temperature - -18F (-28C)
- Pelleted - Liquid to a 25 - 30 sol
- Rate of liquid application anti-icing-15-25
GAL/LM Deice 25-60 GAL/LM - (.5-1 gallon/1000 Ft²)
- Rate dry 200-400 LANE MILE (10-25/1000 FT²)
- Deice Anti-ice Pre wet sensitive areas
- Agitation of liquid prior to loading
- Contains no chlorides beware of fake CMA
- Safest deicer for new concrete
9CMA 40
- Working temperature - 20F (-7C)
- Eutectic temperature - -8F (-22C)
- 40 CMA 60 Sodium Chloride
- Spread Same as rock salt - 200 - 500 LANE
MILE - Used to prevent spalling
- Used only where there is no steel in reinforced
concrete. - Lower cost deicer.
10Anhydrous Sodium Acetate (NAAC)
- Working temperature - 0F (-18C)
- Eutectic temperature - -8F (-22C)
- Pelleted only
- Spread 200 - 500 LANE MILE
- 7-20 per 1000 Ft²
- Deicer contains no chloride
- Used in salt sensitive areas airport runways,
bridges, parking garages, doorways, sidewalks,
etc.
11Potassium Acetate Based (KAC) CF7
- Working temperature - -26F (-32C)
- Eutectic temperature - -76F (-60C)
- Liquid 50 solution
- Rate of liquid application 15-3O GAL/LM
- .5 to 1 gallon per 1000 Ft².
- Deice anti-ice pre wet
- No agitation indefinite storage life
- Contains no chloride
- Ideal for Fixed Anti-icing Spray Technology
(FAST)
12Hidden Costs of Deicing
- Cost of salt
- Purchase price
- Storage
- Labor
- Equipment
- Corrosion to structures and vehicles
- Cost of sand
- Purchase price
- Storage
- Labor
- Equipment
- Clean up
- Lawsuits
13Other Hidden Costs
- Cost to public if we dont deice.
- Accidents
- Delays
- Lost business
- Lost production
- Environmental concerns
- Water quality
- Chlorides
- Damage to vegetation and soils
- Air quality
- PM10
- Sand siltration
14Federal Highway Administration
- Search for chloride salt alternatives
- Environment
- Performance
- Low Corrosion
15CMA, NAAC CF7The Problem Solvers
16Acetate Ion
- Chemical formulaCH3COO-
- Low corrosion
- Low toxicity
- Biodegradable
- Long lasting effect
17Raw Material for Acetates
- Acetic Acid
- Acetate ion
- Found in vinegar
- pH changed when reacted base materials
- Biodegradable
-
18Acetate Deicers
- Calcium magnesium acetate (CMA)
- Ca3Mg7(CH3COO)20
- Potassium acetate (KAc)
- CH3COOK
- Anhydrous sodium acetate (NaAc)
- CH3OONa
19Calcium Magnesium Acetate
- Dolomitic lime acetic acid
- yields
- Ca3Mg7(C2H3O2)20
20Calcium Magnesium Acetate
- Since 1979
- Environmentally safe
- Low corrosion
- Safe for concrete
- Effective performance
- Residual effect
- Stores well
- Biodegradable
- Low toxicity
- Costs more to make!
21Cryotech NAACSolid Runway Deicer
- 97 Anhydrous Sodium Acetate
- lt1 corrosion inhibitors
- CH3COO- Na
2297 Anhydrous Sodium Acetate
- Since 1997
- Environmentally safe
- Low corrosion
- Effective performance
- Approved for airports
- Residual effect
- Stores well
- Biodegradable
- Low toxicity
- Costs more to make!
23CF7 Liquid DeicerPotassium Acetate-Based
Acetic Acid Potassium Hydroxide
yields Potassium Acetate Water (plus
proprietary corrosion Inhibitors) HC2H3O2 KOH
gt KC2H3O2 H2O
24Problem Solver
- Environment
- Anti-icing and Deicing
- New bridges, Chloride Contaminated bridges
- Sidewalks, Doorways Parking Structures
- Blending/Inhibitor
- Fixed anti-icing spray technology
- (F.A.S.T.)
25Understanding Deicers
- Must know how to use deicers
- Effectively and how they work.
26What Is Anti-Icing?
- Anti-icing is a snow and ice control measure to
prevent a strong bond between frozen
precipitation or frost and a pavement surface by
timely application of a chemical freezing point
depressant. Proactive approach.
27Anti-icing Expectations
- Snow more easily removed
- Ice may not form or remain slushy
- Lower chemical usage
- Shoveling, plowing, brooming required
- Lower equipment maintenance costs
28What Is De-Icing?
- De-icing is an measure where a deicer is applied
to the top of an accumulation of snow, ice or
frost that is already bonded or formed to the
pavement surface. Reactive approach.
29Equipment
- Using the right equipment
- For effective snow ice control
30New Bridges, Parking Garages, Elevated Walkways
CMA/NAAC/CF7 The problem solver
31FHWA - CMA Study Conclusions
- Concrete w/o rebar
- Little weight loss or spalling
- Concrete with rebar
- No damage
- 4 Year study
- Non-metallics
- Little affect
CMA The problem solver
32Costs of Using Chloride Based Deicers
- Cost of new construction - 20,000-24,000/Space
- Cost to repair chloride damage 3000-4000/space
- Cost of lost revenue while out of service?
- Cost of inconvenience to customers.
- Cost of demolition
- Cost of liability and insurability
- Cant afford chloride deicers damage from
50/space of salt over a 20 year period
33CMA Effect on Chloride Contaminated Concrete
- The Danish corrosion centre, 1990
- CMAseems to delay the onset of corrosion.
- BP research centre, 1989
- Changingto acetate deicer decreases the
corrosion rate of steelby more than a factor of
ten.
34Corrosion Retardation
35Effect of Deicers on ConcreteSpalling of Non
Air-Entrained Structural Concrete
Dept of Transport, UK, 1993
36Concrete Spalling
37Acetate Deicers Summary of Options
- Direct application
- With chloride deicers
- With sand
- Liquid deicer
- Liquid anti-icer
- Liquid pre wetter
38Deicing Chemicals Review
- Sodium chloride
- Magnesium chloride
- Calcium chloride
- Potassium chloride
- Combinations of all of the above
- Some with inhibitors packages
- Calcium magnesium acetate (CMA)
- Potassium acetate (CF7)
- Anhydrous sodium acetate (NAAC)
39Calcium Magnesium Acetate (CMA)
- Working temperature - 20F (-7C)
- Eutectic temperature - -18F (-28C)
- Pelleted - Liquid to a 25 - 30 sol
- Rate of liquid application anti-icing-15-25
GAL/LM Deice 25-60 GAL/LM - Rate dry 200-400 Lane Mile (10-25/1000 Ft²)
- Deice Anti-ice Pre wet sensitive areas
- Agitation of liquid prior to loading liquid.
- Contains no chlorides
- Safest deicer for new concrete
40CMA 40
- Working temperature - 20F (-7C)
- Eutectic temperature - -8F (-22C)
- 40 CMA 60 Sodium Chloride
- Spread 200-500 LANE MILE (10-25/1000 Ft²)
- Used to prevent spalling
- Used only where there is no steel in reinforced
concrete. - Lower cost deicer.
41Anhydrous Sodium Acetate (NAAC)
- Working temperature - 0F (-18C)
- Eutectic temperature - -8F (-22C)
- Pelleted only
- Spread 200-500/Lane Mile (7-20/1000 Ft²)
- Deicer contains no chloride
- Used in salt sensitive areas airport runways,
bridges, parking garages, doorways, sidewalks,
etc.
42Potassium Acetate Based (KAC) CF7
- Working temperature - -26F (-32C)
- Eutectic temperature - -76F (-60C)
- Liquid 50 solution
- Rate of liquid application 15-3O GAL/LM
- .5 1 gallon per 1000 Ft²
- Deice anti-ice pre wet
- No agitation indefinite storage life
- Contains no chloride
- Ideal for Fixed Anti-icing Spray Technology
(FAST)
43Potassium Acetate Based (KAC) CF7
- Working temperature - -26F (-32C)
- Eutectic temperature - -76F (-60C)
- Liquid 50 solution
- Rate of liquid application 15-3O GAL/LM
- .5 1 gallon per 1000 Ft²
- Deice anti-ice pre wet
- No agitation indefinite storage life
- Contains no chloride
- Ideal for Fixed Anti-icing Spray Technology
(FAST)
44Acetate DeicersSummary of Options
- Direct application
- With chloride deicers
- With sand
- Liquid deicer
- Liquid anti-icer
- Liquid pre wetter
45Options for Parking Garage Longevity
- Good Design
- Good Construction Materials
- Good Drainage
- Good Sealers/Membranes - Waterproofing
- Continuous Maintenance Practices
- Avoid Chloride Deicers
- Use Non-Chloride Deicers like NAAC, CMA CF7
46Questions?
Tony Myhra - (800)346-7237 www.cryotech.com NAAC/
CMA DVD Available