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|Dustproofing unsurfaced areas : facilities technology application test (FTAT) demonstration, FY 86
|Armstrong, Jeffrey P.
|Geotechnical Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
|Miscellaneous paper (U.S. Army Engineer Waterways Experiment Station) ; GL-87-19.
Abstract: The occurrence of dust as a result of military activities is discussed. Recommended procedures and results of a dust control field demonstration on crushed limestone roads, a cherty gravel parking lot, and a sandy clay assault airstrip are presented. A comparison of two brine solutions, magnesium chloride (MgCl₂) and calcium chloride (CaCl₂), is made with respect to concentration of solution, rate and ease of application, cost, and overall effectiveness on crushed limestone roads. A 32 percent MgCl₂ brine solution was applied at a rate of 0.50 gal/sq yd, and a 38 percent CaCl₂ brine solution was applied at a rate of 0.27 to 0.36 gal/sq yd. The CaCl₂ appeared to penetrate the crushed limestone roads more easily than the MgCl₂ which exhibited ponding and surface runoff. The better penetrating characteristics of CaCl₂ may be attributed to the lower rate of application. Both the MgCl₂ and CaCl₂ were considered equally effective on the crushed limestone roads after a 2-1/2 month review. CaCl₂ was also applied to a cherty gravel parking lot and sandy a clay assault airstrip. The parking lot exhibited effective dust control, but the assault airstrip was marginally effective. This is attributed to the higher concentration of fine material in the poorly graded soil. The cost of brine solutions is approximately the same on an F.O.B. basis but may vary considerably based on shipping costs. A cost comparison and a product sheet are included in Appendix C.
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