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Determination of Moisture Content of Deicing Salt at Point of Delivery. Final rept.
| 题名： | Determination of Moisture Content of Deicing Salt at Point of Delivery. Final rept. |
| 作者： | Long-R.P.; Demars-K.R.; Balunaini-U. |
| 关键词： | *Deicing-; *Moisture-content; *Salts-; *Road-surfaces.;Sodium-chloride; Measuring-instruments; Snow-removal; Accuracy-; Ice-removal; Portable-equipment; Density-; Deicers-. |
| 摘要： | The object of this research was to find or develop a simple, affordable method or device for quickly measuring the moisture content of road salt in the field. The test should be able to be carried out in about fifteen minutes and be capable of measuring moisture contents up to approximately 5%to an accuracy equal to +/-0.5%. Of the several methods for moisture measurement, the infrared, nuclear and capacitive methods were eliminated because of high cost, measurement, errors of ineffectiveness. The primary focus was electrical conductivity and microwave methods. The electrical conductivity/resistivity properties of moist deicing salt were measured for six salt sources including both solar and mined salt. The electrical properties of a given salt is shown to vary directly with moisture content but is also affected by temperature, packing density and to a lesser degree by particle size. Yet, accounting for these variables, it is possible to predict water content using conductivity to +/-0.4%. For all of the salts combined, the accuracy reduces to +/-0.8%. Microwave drying is the most accurate method for measurement of salt moisture content. The reduction of data requires a bit of practice. The equipment is inexpensive but requires a power supply. |
| 报告类型： | 科技报告 |
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