255240.02 SECTION 239—SODIUM CHLORIDE AND CALCIUM CHLORIDE
239.01 Description
These specifications cover chloride used as a stabilizer or to control snow and ice.
239.02 Detail Requirements
a.Sodium chloride shall conform to AASHTO M143, Type I, with the following exceptions:
1.The sodium chloride content shall be at least 97 percent of the dry weight.
2.The moisture content shall be not more than 5 percent.
3.When shipped in bulk, sodium chloride shall contain an anticaking additive.
4.Sodium chloride will be tested in accordance with VTM-28. When practicable, the Engineer will take samples at the source from indoor storage or from adequately protected outdoor storage at the rate of approximately one sample per 4,000 tons. Samples will not be taken from uncovered storage. The Engineer will take samples at the destination at the time of delivery when inspection at the source is not practicable, or when material is shipped directly from uncovered storage. Inspection service will be provided when the frequency of shipments from approved stock at the source, makes it economically justified. The Inspector’ s stamp on the shipping or delivery report will indicate inspection of the shipments. When inspection service is not provided, the supplier may ship material but shall certify that the sodium chloride came from an approved source. An authorized representative of the supplier shall sign the certification if it is stamped on the shipping or delivery report.
b.Calcium chloride shall conform to AASHTO M144. SECTION 240—LIME
240.01 Description
These specifications cover lime to be used as a stabilizer or soil conditioner.
240.02 Detail Requirements
a.Hydrated lime shall conform to ASTM C207, Type N, except that the average percentage of calcium oxide shall be at least 93. Single test results shall not be below 90 percent.
b.Hydraulic lime shall conform to ASTM C141.
Source: Virginia Road and Bridge Specifications, 2020 Edition. Pages 283–282 of 1,065.