m (Pine Resin Pavement moved to Potawot pine resin pavement: Potawot and Appropedia naming convention) |
JaquelynJS (talk | contribs) No edit summary |
||
| Line 1: | Line 1: | ||
{{115inprogress|December 12th, 2008}} | {{115inprogress|December 12th, 2008}} | ||
[[Image:path1.jpg|right|thumb|Potowat pine resin pavement]] | [[Image:path1.jpg|right|thumb|Potowat pine resin pavement Taken by Jaquelyn Shur]] | ||
===Potawot Paths=== | ===Potawot Paths=== | ||
Potawot Health Village is located on 40 acres of land in Arcata, CA. Approximately two miles of paths have been constructed on their land in order for | Potawot Health Village is located on 40 acres of land in Arcata, CA. Approximately two miles of paths have been constructed on their land in order for community enjoyment of the conservation land that surrounds the main facility. Instead of applying conventional asphalt to create walkways, Potawot chose to implement pine resin pavement in order to ease potential impact on the land. | ||
==='''Material Description: Pine Resin Pavement'''=== | ==='''Material Description: Pine Resin Pavement'''=== | ||
'' What is it made of?'' | *'' What is it made of?'' | ||
Pine Resin pavement is a combination of regular aggregate, or crushed rock, sealed together with pine rosin and pitch from pine trees <nowiki>(Product Review, 1999).</nowiki> | Pine Resin pavement is a combination of regular aggregate, or crushed rock, sealed together with pine rosin and pitch from pine trees <nowiki>(Product Review, 1999).</nowiki> | ||
*''How is it Processed'' | |||
This natural alternative to asphalt isn’t mixed and poured hot as regular asphalt is, but instead mixed together through a cold process. Water and the pine emulsion are mixed together and then laid out where it is needed. The mixture is then compacted and left to set using conventional methods, such as steamrollers in larger areas. Installation in Potawot was done by hand labor. (NEED ERIK)Instead of the product setting by cooling, it sets through evaporation of water leaving the mixture. <nowiki>(Product Review, 1999)</nowiki> | |||
Much of the energy required to lay normal asphalt is avoided because the mixture does not have to be heated up, saving precious fossil fuel resources. Also, because the adhesive material is made of tree resin rather than normal asphalt, | *''What is the final product?'' | ||
The final product is similar in appearance to asphalt in texture and thickness but can vary in color. The pine resin transparent and takes the color of the aggregate. | |||
Much of the energy required to lay normal asphalt is avoided because the mixture does not have to be heated up, saving precious fossil fuel resources. Also, because the adhesive material is made of tree resin rather than normal asphalt, the pavement doesn’t contain any VOC’s of PAHs. <nowiki>(Product Review 1999)</nowiki> The final product is similar in appearance to asphalt in texture and thickness but can vary in color. The pine resin is transparent and takes the color of the aggregate. | |||
==='''Durability'''=== | ==='''Durability'''=== | ||
[[Image:pathd2.jpg|left|thumb|Slight cracks in pine resin that had to be | [[Image:pathd2.jpg|left|thumb|Slight cracks in pine resin that had to be fixed''taken by Jaquelyn Shur'']] | ||
The strength of pine resin pavement varies due to the quality of application, site location and actual pine resin product used. NaturalPave XL, a pine resin distributor put it's product to the Marshall Stability Test. This test heats up the pavement to 140 F and then observes how the pavement responds to heavy weight applied. NaturalPAVE XL withstanded "8,000 to 18,000 pounds" <nowiki>(NaturalPAVE XL, 2008).</nowiki> The document also stated that the typical Marshall Stability results for conventional asphalt are generally 4,000 to 6,000 pounds. | The strength of pine resin pavement varies due to the quality of application, site location and actual pine resin product used. NaturalPave XL, a pine resin distributor put it's product to the Marshall Stability Test. This test heats up the pavement to 140 F and then observes how the pavement responds to heavy weight applied. NaturalPAVE XL withstanded "8,000 to 18,000 pounds" <nowiki>(NaturalPAVE XL, 2008).</nowiki> The document also stated that the typical Marshall Stability results for conventional asphalt are generally 4,000 to 6,000 pounds. | ||
| Line 28: | Line 28: | ||
==='''Cost'''=== | ==='''Cost'''=== | ||
According to the EPA, Resin Pavements | According to the EPA, Resin Pavements cost $3/square foot for the material and installation. | ||
According to Potawot numbers,..... | |||
==='''Comparison to Conventional Asphalt'''=== | ==='''Comparison to Conventional Asphalt'''=== | ||
Pine resin pavement is | Pine resin pavement is an appropriate alternative for asphalt. However, asphalt is the conventional way of paving surfaces and may be cheaper and easier in the short run. Asphalt also has many negative externalities associated with it. Since it is a hot mix, it takes energy from fossil fuels to heat it up. Once it is heated it emits harmful air pollutants into the air, such as formaldehyde. <nowiki>(EPA, 2003)</nowiki> Listed below are advantages and disadvantages for using pine resin pavement instead of asphalt. | ||
{| border="1" cellspacing="0" cellpadding="3" align="center" | {| border="1" cellspacing="0" cellpadding="3" align="center" | ||
! Advantages !! Disadvantages | ! Advantages !! Disadvantages | ||
|- | |- | ||
| | | High solar reflectivity: it reflects more sunlight so the pavement absorbs less heat. || Limited to use to low traffic areas | ||
|- | |- | ||
| | | Not composed of petroleum products || High Cost | ||
|- | |- | ||
| | | Materials are natural and renewable || Labor Intensive | ||
|- | |- | ||
| | | Application is not energy intensive || Certain outdoor temperatures are needed for proper finishing | ||
|- | |- | ||
| Emits no air pollution || Technology is new, product and information are hard to find | | Emits no air pollution || Technology is new, product and information are hard to find | ||
| Line 55: | Line 57: | ||
*“Paving Without Asphalt or Concrete”Product Review: Environmental Building News. Nov. 1, 1999. | *“Paving Without Asphalt or Concrete”Product Review: Environmental Building News. Nov. 1, 1999. | ||
*NaturalPAVE® XL “Technical Bulletin-Pavement Preformance Testing.” Soil Stabilization Products Company, Inc. | *NaturalPAVE® XL “Technical Bulletin-Pavement Preformance Testing.” Soil Stabilization Products Company, Inc. | ||
*NaturalPAVE® XL “An aesthetic, environmentally friendly | *NaturalPAVE® XL “An aesthetic, environmentally friendly alternative to asphalt”. Soil Stabilization Products Company, Inc. | ||
*"Resin Pavement: Cool Pavement Product Information" Environmental Protection Agency, US Government.Oct. 2008. [http://www.epa.gov/heatisland/images/extra/level3_pavingproducts.html#9] | *"Resin Pavement: Cool Pavement Product Information" Environmental Protection Agency, US Government.Oct. 2008. [http://www.epa.gov/heatisland/images/extra/level3_pavingproducts.html#9] | ||
"National Emission Standards for Hazardous Air Pollutants: Asphalt Processing and Asphalt Roof Manufacturing" Environmental Protection Agency, US Government Federal Register. May 17, 2003 [http://www.epa.gov/EPA-AIR/2003/May/Day-07/a5624.htm] | *"National Emission Standards for Hazardous Air Pollutants: Asphalt Processing and Asphalt Roof Manufacturing" Environmental Protection Agency, US Government Federal Register. May 17, 2003 [http://www.epa.gov/EPA-AIR/2003/May/Day-07/a5624.htm] | ||
[[Category:Potawot]] | [[Category:Potawot]] | ||
Revision as of 05:16, 20 November 2008
Potawot Paths
Potawot Health Village is located on 40 acres of land in Arcata, CA. Approximately two miles of paths have been constructed on their land in order for community enjoyment of the conservation land that surrounds the main facility. Instead of applying conventional asphalt to create walkways, Potawot chose to implement pine resin pavement in order to ease potential impact on the land.
Material Description: Pine Resin Pavement
- What is it made of?
Pine Resin pavement is a combination of regular aggregate, or crushed rock, sealed together with pine rosin and pitch from pine trees (Product Review, 1999).
- How is it Processed
This natural alternative to asphalt isn’t mixed and poured hot as regular asphalt is, but instead mixed together through a cold process. Water and the pine emulsion are mixed together and then laid out where it is needed. The mixture is then compacted and left to set using conventional methods, such as steamrollers in larger areas. Installation in Potawot was done by hand labor. (NEED ERIK)Instead of the product setting by cooling, it sets through evaporation of water leaving the mixture. (Product Review, 1999)
- What is the final product?
Much of the energy required to lay normal asphalt is avoided because the mixture does not have to be heated up, saving precious fossil fuel resources. Also, because the adhesive material is made of tree resin rather than normal asphalt, the pavement doesn’t contain any VOC’s of PAHs. (Product Review 1999) The final product is similar in appearance to asphalt in texture and thickness but can vary in color. The pine resin is transparent and takes the color of the aggregate.
Durability
The strength of pine resin pavement varies due to the quality of application, site location and actual pine resin product used. NaturalPave XL, a pine resin distributor put it's product to the Marshall Stability Test. This test heats up the pavement to 140 F and then observes how the pavement responds to heavy weight applied. NaturalPAVE XL withstanded "8,000 to 18,000 pounds" (NaturalPAVE XL, 2008). The document also stated that the typical Marshall Stability results for conventional asphalt are generally 4,000 to 6,000 pounds.
Other studies have claimed that resin pavement has three times the compressive strength then that of asphalt and that resin pavement is 'highly water-resistant". (Product Review, 1999)
As impressive as these finding are, the possibility for large scale use seem to be limited to low traffic areas as "cold mix is certainly not for roads subjected to medium to heavy traffic." (Dooley, 2008)
Cost
According to the EPA, Resin Pavements cost $3/square foot for the material and installation.
According to Potawot numbers,.....
Comparison to Conventional Asphalt
Pine resin pavement is an appropriate alternative for asphalt. However, asphalt is the conventional way of paving surfaces and may be cheaper and easier in the short run. Asphalt also has many negative externalities associated with it. Since it is a hot mix, it takes energy from fossil fuels to heat it up. Once it is heated it emits harmful air pollutants into the air, such as formaldehyde. (EPA, 2003) Listed below are advantages and disadvantages for using pine resin pavement instead of asphalt.
| Advantages | Disadvantages |
|---|---|
| High solar reflectivity: it reflects more sunlight so the pavement absorbs less heat. | Limited to use to low traffic areas |
| Not composed of petroleum products | High Cost |
| Materials are natural and renewable | Labor Intensive |
| Application is not energy intensive | Certain outdoor temperatures are needed for proper finishing |
| Emits no air pollution | Technology is new, product and information are hard to find |
| Not composed of Toxic Chemicals | Companies that sell the pine resin don't apply it as well |
References
- Dooley, Erin E. “New Default for Asphalt?” Environmental Health Perspectives vol.116, no 9, pg 379, 2008.
- “Paving Without Asphalt or Concrete”Product Review: Environmental Building News. Nov. 1, 1999.
- NaturalPAVE® XL “Technical Bulletin-Pavement Preformance Testing.” Soil Stabilization Products Company, Inc.
- NaturalPAVE® XL “An aesthetic, environmentally friendly alternative to asphalt”. Soil Stabilization Products Company, Inc.
- "Resin Pavement: Cool Pavement Product Information" Environmental Protection Agency, US Government.Oct. 2008. [1]
- "National Emission Standards for Hazardous Air Pollutants: Asphalt Processing and Asphalt Roof Manufacturing" Environmental Protection Agency, US Government Federal Register. May 17, 2003 [2]