SODIUM CHLORIDE MGS-92-05G 1.0 SCOPE. This specification covers sodium chloride, obtained from natural deposits (rock salt) or produced by man (evaporated, solar, other) for use as a de-icer for maintenance purposes. 2.0 MATERIAL. 2.1 Chemical Composition. The minimum percent sodium chloride (NaCl) shall be as follows for the material ordered, when tested in accordance with MoDOT Test Method T32 included in Annex A of this specification. Name Minimum % NaCl 95% Sodium Chloride 95 2.2 Gradation. The gradation shall conform to the following requirements: Sieve Size Percent Passing (by weight) 1/2 inch 100 3/8 inch 95 - 100 No. 4 15 - 95 No. 8 5 - 65 No. 30 0 - 15 2.3 Condition. The sodium chloride shall arrive at the delivery point in a free-flowing and usable condition. 2.4 Moisture. The moisture content at the delivery point shall not exceed 2.0 percent based on dry weight. Visual appearance of excess water will result in immediate rejection. 2.5 Foreign Material. Sodium chloride shall be relatively free from any foreign material at the delivery point. Residue from truck beds such as coke, grain, or other materials not germane to sodium chloride will be cause for rejection. Any oversize foreign material will result in immediate rejection.
