2,216
edits
Changes
Jump to navigation
Jump to search
Line 49:
Line 49:
no edit summary
Generally, the [[vegetation]] growing closest to the source will be most strongly affected by salt. Plants actively growing in late winter (when salt levels are highest) are also more significantly affected. So, warm season [[Graminoids: List|grasses]] offer an advantage over cool season grasses, because they emerge later in the spring when excess salt has been flushed away.
Generally, the [[vegetation]] growing closest to the source will be most strongly affected by salt. Plants actively growing in late winter (when salt levels are highest) are also more significantly affected. So, warm season [[Graminoids: List|grasses]] offer an advantage over cool season grasses, because they emerge later in the spring when excess salt has been flushed away.
{{:turf}}
{{:turf}}
==Other Design Features==
Other options that can be considered to reduce the amount of salt that needs to be applied in a parking lot include:
*The use of [[Permeable pavements|permeable pavers]]: these improve drainage and prevent melt water from ponding and refreezing.
*Seasonally closing parking areas: many parking lots have areas that are infrequently used outside of the holiday shopping period. These areas can be closed and not maintained through much of the winter season, reducing both the effort and amount of salt required.
==Additional Work:==
===Parking Lot Friction Testing===
Two of the main considerations contractors face in maintaining parking lots in winter are: what application rate should be used; and what is the level of service expected by the property owner, for which the bare pavement return time is a common measure (this is the amount of time it takes after treatment to achieve a bare surface). To better understand these questions in 2017 the LSRCA obtained a friction tester, with a goal of quantifying the effectiveness of various practices and salt application rates. Here we present some of the findings of this study.
As can be seen in the inset table, the unit for measuring friction is ‘µ’, and the closer to 1.00 the µ value, the safer the surface. A high µ, however, is not the only measure of safety – many smooth indoor floors will have low µ values, in the range of 0.3 to 0.4, and they are generally not considered unsafe. Through this study, we measured the friction of several different surfaces, which received varying treatments.
{|class="wikitable"
|+Friction Values and Related Road Surface Conditions
|-
!Measured Friction Value (µ)
!Road Surface Condition
|-
|0.8 - 1.00
|Dry, New Asphalt
|-
|0.50 - 0.80
|Wet Asphalt
|-
|0.30 - 0.50
|Wet Sand on Ice
|-
|0.25 - 0.30
|Dry Sand on Ice
|-
|0.25 - 0.25
|Dry Ice
|-
|0.05 - 0.15
|Wet Ice
|}
==External links==
==External links==
*[http://www.smartaboutsalt.com/ Smart about Salt]
*[http://www.smartaboutsalt.com/ Smart about Salt]
----
----