Snow and Ice Control: Guidelines for Materials and Methods (2004) / Chapter Skim
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Pages 18-25
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From page 18... ...
They are used in anti-icing, in deicing, in mixing with abrasives, and in the production of liquid ice control chemicals. Anti-icing with Solid Ice Control Chemicals Solid chemicals have been used for many years in antiicing operations.
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From page 19... ...
can be found in Attachment 1. Mixing Solid Ice Control Chemicals with Abrasives The mixing of solid chemicals with abrasives has been a popular practice for many years.
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Table 8 demonstrates the relationship between discharge rates and application rates. LIQUID ICE CONTROL CHEMICALS Liquid chemicals serve a number of functions in snow and ice control operations.
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Pretreating for and Treating Frost, Black Ice, and Icing with Liquid Chemicals This tactic provides arguably the best use of liquid ice control chemicals. A 23-percent solution of liquid NaCl applied at 40 to 60 gal/LM (or equivalent effective amount of other chemical)
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From page 22... ...
Liquid chemicals are more sensitive to pavement temperature, dilution, and ice/pavement bond than solid chemicals. Analytical results were generated during the study to define the time to freeze of chemical brines as a function of application rate, pavement temperature, and rate and moisture content of precipitation.
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From page 23... ...
WE/snowfall rate for a pavement temperature range of 20°F to 27°F using 23-percent concentration liquid NaCl. Figure 3.
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From page 24... ...
The equivalent application rates for each of the five ice control chemicals are given in Table A-6 of Attachment 1 for a range of pavement temperatures. The application rates are normalized to 100 lb/LM of dry solid NaCl.
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From page 25... ...
The application rate for abrasives varies considerably among maintenance agencies. Application rates for most agencies fall within the 500 lb/LM to 1,500 lb/LM range with the overall average centering around 800 lb/LM.
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