Achieving Sustainabiliy & Safety Through Environmental Control of Dust … · 2018-06-13 · Dust...
Transcript of Achieving Sustainabiliy & Safety Through Environmental Control of Dust … · 2018-06-13 · Dust...
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Achieving Sustainability & Safety Through Environmental Control of
Dust & Sediment with Acrylic Polymer Technology
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Overview
• Introduction to Dust / Key Figures• Sources of Dust / Dust Problems• Traditional Practices for Dust Control• History of Acrylic Polymer Technology• Characteristics of Acrylic Polymers• Sustainable Performance and Safety through DirtGlue
Additives• Applications and their Effectiveness• Cost Competitiveness• A Look Ahead
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Simple Rule
Wherever there is a construction site, military operation,
or just disturbed soil,whenever soil is being moved or
equipment is being used on un-sealed surfaces,
wind and water erosion as well asdust problems occur.
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Key Figures
• 6 billion tons of soil washed or blown away each year(exceeding the “Dust Bowl” years of the 1930’s)
• Constantly 38 million acres at risk to wind or water erosion
• A total of 1.5 million miles of unpaved roads in the U.S. (53% of all roads)
• 3.8 million acres of public roads (not including parking lots, farm lanes, private roads, etc.)
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What is Dust?
• Small particles (0.5 to 50 µm)
• Inorganic (sand, salt, stone dust, fly ash, etc.)or
• Organic (coal dust, grain dust, sawdust, etc.)
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Sources of Dust
• Wind-blown dust from exposed surfaces such as bare land and construction sites
• Dust caused by vehicle/equipment movement along un-sealed roads
• Military operations• Mines and quarries• Roads works• Land development (residential, commercial and
military)• Agriculture and forestry activities
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Dust Problem (1)
• Human health issues
- irritation in upper respiratory tract with dustparticles > 2.5 µm
- damage of epithelial cells in lung and potentialinfiltration into bloodstream with dust particles< 2.5 µm
- additional health risks for people that sufferfrom asthma, bronchitis, emphysema, or otherrespiratory conditions
- potential health problems for infants, children,the elderly and pregnant women.
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Dust Problem (2)
• Operational issues
- increases safety hazards
- additional equipment maintenance
- reduces mission success
- unnecessary training delays
- potential malfunction of electronic and other equipment
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Dust Problem (3)
• Environmental issues
- contaminates groundwater and edible crops
- stunts growth of vegetation
- sediments reduce habitat of aquatic life,ultimately affecting the entire food chain
- loss of valuable soil
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Unsatisfactory Quick Fix (1)
• Water
- extremely short-term solution
- must be applied repeatedly to counterevaporation
- waste of natural resource
- labor intensive
- no stabilization capabilities
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Unsatisfactory Quick Fix (2)
• Chlorides or Salt Brines
- short-term control
- leads to saline contamination of groundwaterand death to plant life
- causes corrosion of equipment
- will wash out with rain
- little stabilization capabilities
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Unsatisfactory Quick Fix (3)
• Petroleum Products (motor oil, cut-back asphalt)
- minimizes re-suspension of fine dustparticles
- leads to heavy contamination of groundwaterand surface streams
- already prohibited in many states
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A Better Solution
Sustainable, durable, environmentally safe dust suppression and sediment control by application of acrylic polymer technology
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Proactive Approach is Preventing the Problem at the Source
• Bonds individual soil particles together making them too large to move either by wind or water erosion
• TSS is minimized
• PM10 and PM2.5 is significantly reduced
• Sustainable protection over a considerable period of time
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Polymers in the Erosion Control Industry
Two main types used in erosion and soil stabilization industry:
- Vinyl Acetates (PVAs, VAEs) and co-polymers (mixed blends of emulsions)
- Latex/Acrylic based emulsions
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Main drawbacks of vinyl based emulsions
• Little to no UV-protection
• Hard to maintain as a hard surface
• High water absorption (20-40%) even after extended curing
• Water swollen polymer results in soft and weak film/crust
• Weaker bond than acrylic films
• Only short-term effect – no sustainability
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How does Acrylic Polymer Technology Work for Soil Stabilization?
• Material Characteristics- Polymer is long chain and high molecular weight material
• Sustainability- Serves as binder to adhere small dust particlestogether
- Forms flexible and firm surface crust as protection againstwind and water erosion
- Does not deplete natural resources
• Safety- As a water-miscible and non-volatile product, once cured,polymer does not evaporate, wash away in rainyconditions, or contaminate the groundwater
- It will not leach through the soil
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Advantages
• Environmentally friendly
• Works with indigenous soil/surface materials
• Superior bonding
• Sticks to itself
• All weather stable
• Water insoluble on curing
• Non-toxic / non-hazardous
• Non-corrosive
• Non-flammable
• Stops wind erosion
• Stops water erosion
• Stabilizes surface and/or subsurface
• Reduces or prevents pollution
• Will not leach out of soil
• Available clear or colored
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Environmental Considerations
Acrylic polymers have been proven to be environmentally safe products.
• Contain no harmful chemical solvents• Do not emit any volatile organic compounds (VOC)• Are non-corrosive and non-flammable• Do not change the pH of the soil• Have no harmful effects on people, plants,
animals, fish, or other aquatic life
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Sustainable Performance through Product Additives developed by
DirtGlue Enterprises• Excellent film-forming properties over a broad temperature
range
• Superb adhesion to fine particles, both inorganic and organic
• Unusual film strength and flexibility over a wide temperature range
• Remarkable chemical, thermal and ultraviolet light stability
• Enhanced hydrophobic characteristics
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Safety Driven Applications
• Treat roads in battle/enemy zones to minimize dust clouds – making it less easy to track troop movements from a distance
• Spray application on large areas where dust particle sensitive equipment such as helicopters, aircraft, weapons, etc. is being used or stored – reduces, if not eliminates equipment failures and reduces time consuming, unplanned maintenance
• Incorporate DirtGlue polymer emulsions into sand or sand bags thereby providing a stable and hardened defense
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More Applications
• Non-traffic surfaces• Light-duty and heavy-duty traffic surfaces• Fuel and ammunition supply routes• Helicopter landing pads• Road/Trail intersections• Bivouac areas• Temporary aircraft taxiways• Training grounds• Field compound areas• Temporary aircraft runways (new or
expansion)• Hardened revetments (more permanency)
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DirtGlue Applications
Surface application
• Wind and water erosion control for storage piles and other non-traffic surfaces
• Erosion control / bank stabilization
• Dust control on dirt and gravel roads
• Tackifier for hydroseeding process
Mixed in applications
• Stabilization of driving surfaces
• Pot hole patching
• Resurfacing of worn out asphalt driveways
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Effectiveness of Acrylic Polymer Technology
10%Petroleum resin #2 (PennzSuppress D)
1%Petroleum resin #1 (Coherex)
20%Lignosulfonate
10% Calcium chloride
20%Magnesium chloride
30% Pine resin
90%Water-based acrylic polymers
Effectiveness at Reducing PM10Emissions
Dust Suppressant
Ref.: Project DUST, Kern County, CA (Mojave Desert)
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Cost Effectiveness
• Long-lasting effectiveness of individual acrylic polymer applications compared to traditional practices
• Efficient application procedures that provide improved productivity of personnel/labor force
• No special equipment (read: investment) needed for successful applications. Standard construction/landscaping equipment sufficient.
• Environmental compliance reduces risk of penalties or costly delays on construction sites
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Further Product Developments based on Acrylic Polymer Technology
• Pot hole repair in connection with DirtGlue Catalyst that allows applications at low temperature and provides fast curing
• Coal pile / ash stabilization
• Concrete Sealer
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Conclusion
• Fugitive dust and erosion are some of the most pressing problems on any disturbed soil in the United States
• Traditional practices produce only limited success and short-term effect
• Acrylic Polymer Technology is a base for superior solutions• DirtGlue polymer additives and refined application
technology yield sustainable performance and safety• New Technology is cost competitive compared to traditional
practices• A variety of additional applications are being developed