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在低、中级路面上加铺的砂土磨耗层,在干旱天气容易被磨损而且扬尘,对人民健康和路旁农作物有害。根据初步试验,如果在砂土磨耗层中加入少量氯化镁,则由于它的吸湿作用,在干旱天气下能保持一定的水分,提高了粘结力、密实度和耐磨性,特别是灭尘效果比较显著。山西省交通厅曾于1959年在砂土磨耗层中掺少量氯化钠,使用寿命较未掺氯化钠的磨耗层延长2～3倍,维修费降低60％。但由于氯化钠(或氯化钙)的生产成本较高,每吨价格200元以上,故未能在道路上广泛应用,而氯化镁目前除炼钢工业、食品工业上有少量需要外,尚无其它用途,资源很丰富。每吨生产价格仅15元左右,且是制造钾肥及溴素的副产品。每生产1吨钾肥可得10
The sand abrasion layer on the low and intermediate roads is easily worn and dusty in dry weather, which is harmful to people's health and roadside crops. According to the preliminary test, if a small amount of magnesium chloride is added to the sand abrasion layer, moisture is retained under dry weather due to its moisture absorption, thereby improving the adhesion, compactness and abrasion resistance, and in particular, the dust elimination effect More obvious. Shanxi Provincial Communications Department was in 1959 in the sand abrasion layer with a small amount of sodium chloride, the service life of the wear layer without sodium chloride extended 2 to 3 times, 60% lower maintenance costs. However, due to the high production cost of sodium chloride (or calcium chloride), the price per ton is more than 200 yuan, it is not widely used on the road, and magnesium chloride is currently in addition to the steelmaking industry, the food industry has a small amount of needs, the No other uses, the resources are very rich. Production price per ton is only 15 yuan, and is the manufacture of potassium and bromine by-products. Every ton of potash fertilizer produced is 10