A good quality control program is essential to any reliable winter operations program. The potential for inconsistencies in delivered products will result in inconsistent performance. Without a good Quality Control program, performance results can differ even though applications and circumstances are the same.
Defined as the mass of a substance and given as a multiple of the mass of the volume of a standard substance (usually distilled water) under prescribed conditions of tempreture and pressure. The specific gravity of 32% calcium chloride is 1.322, or it weighs 1.322 times the weight of water (8.34 lbs. per gallon). For measuring the specific gravity of liquids, a hydrometer is commonly used. For more accurate measurements, the weight of a known liquid is determined under controlled temperature conditions. Generally the standard temperature is 68 degrees F. You can test at delivered temps. using a variable of +/- 1%. If the product test outside of this parameter, allow to warm to 68 degrees and recheck. If outside of the specific gravity as set by the manufacture, you do have the right to reject the load. Make sure you are getting what you pay for.
Specific Gravity Examples
26% – 1.251
30% – 1.298
32% – 1.322
32% Calcium Chloride w/BOOST – 1.35
Salt Brine 23.3% – 1.176
When taking delivery of a brine or Agricultural By Product (ABP) make sure to look at the load ticket and do the math. Example: product being delivered is BOOST @ 1.35 specific gravity and a load is delivered for 4,000 gallons, weight slip TARE should be – 8.34 X 1.35 = 11.259 lbs. per gallon X 4,000 = 45,036 lbs.
Don’t be afraid to ask the driver to place product in a 5 gallon bucket for your hydrometer test. Any reputable vendor will be happy to have you test their product. We want you to have the best product for your operation. Test each load. Know what you’re paying for.
Contract Great Lakes Chloride for Specific Gravity Charts if needed. Or email me at email@example.com