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SALT BRINE
(Can be used alone or as a prewetting agent)
Use NSC's Superior Multi-Mineral Crystals With Natural Trace Elements
The Ideal Brine Solution!
Your Prewetting Solution:

The most cost effective prewetting and liquid solutions can be made from sodium chloride (NaCl) and water (H2O) to form a salt brine. The eutectic composition of sodium chloride & water is 23% NaCl and 77% H2O by weight, which freezes at about -21C (-6F).

De-icing operations are performed to break the bond of snow and ice which has already bonded to the road surface, whereas anti-icing operations are carried out to prevent the formation or development of bonded snow and ice for easier removal. When we speak about de-icing versus anti-icing we are making a distinction between being reactive (de-icing) and pro-active (anti-icing).

Anti-icing choices: Solid or prewetted solid materials can be used as anti-icing agents as well as the use of straight liquids.

De-icing vs. Anti-Icing: De-icing operations are performed to break the bond of snow and ice which has already bonded to the road surface, whereas anti-icing operations are carried out to prevent the formation or development of bonded snow and ice for easier removal. When we speak about de-icing versus anti-icing we are making a distinction between being reactive (de-icing) and pro-active (anti-icing).

Anti-icing choices: Solid or prewetted solid materials can be used as anti-icing agents as well as the use of straight liquids.

Advantages of prewetting: The wetting of a solid material prior to application can improve the effectiveness of the material in many applications. The reason for this is that a solid material (chemical) requires energy to go into solution, and a dry solid chemical particle will remain inert until a liquid film forms. (1) The process of going into solution will be accelerated if a liquid is added to the solid surface. This is one advantage of the benefits of prewetting. Other benefits include: (2) the solid material can be spread more uniformly as it will adhere to the road surface more readily since the granules are wet. The result is less waste from bouncing during application (virtually 100% of the product will stick to the road surface) or from the traffic action over the applied material. (3) The spreading speed can be increased because the product is being applied on a dry (or nearly dry) surface. (4) The application rates are lower which means a spreader load can cover more area which also (5) translates into substantial cost savings as resources are used more efficiently.

Salt & gradation: Sodium chloride (salt) has been the solid material of choice when applying prewetted materials in anti-icing operations. Material gradations have ranged from coarse to fine particle sizes. In de-icing the objective is to get the salt particle to move rapidly through the ice or snow layer to the pavement surface. A larger particle will have greater weight and therefore greater success in penetrating this layer. Because it is recommended that an anti-icing application be made on pavement with a minimal amount of frozen precipitation, the weight of the particles, and thus the coarse gradation, may not be an advantage. Fine particles have more surface area for an equivalent load weight and will go into solution faster. Their use will decrease the time for a solution to form and cover the entire road surface, and if the road is clear or well plowed prior to application, they may be more effective. It is beneficial to have a gradation available which is a compromise between those used for de-icing and anti-icing in order to reduce the need for multiple stockpiles.


Prewetting techniques & equipment: Prewetting can be done by either of three methods. (1) First, a prewetting chemical can be injected into a material stock pile at a specific dosage or (2) a liquid chemical can be sprayed onto a loaded spreader or on the material as it is being loaded into the spreader, or (3) an on-board spray system mounted on the spreader and/or dump body can add a liquid chemical to the dry chemical at the time of spreading.

Using Straight Liquids: Although solid or prewetted solids can be used as anti-icing treatments, there are advantages to the use of liquids for certain conditions at pavement temperatures of about -10C (15F) and above. These include (1) the ability to place the material uniformly over the pavement at relatively fast spreading speeds, and (2) the ability to place the material onto dry pavement as a pre-storm treatment to help avert delays that may lead to snow or ice bonding on the road surface.

Application equipment: There are two principal types of application equipment for highway use. (1) One uses spinners (consisting of a single disk or multiple rotating disks) where as the (2) other uses nozzles on a distributor bar.




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