Impact of Fine Materials Content on the Transport of Dust Suppressants in Gravel Road Wearing Courses
Impact of Fine Materials Content on the Transport of Dust Suppressants in Gravel Road Wearing Courses
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DOI：
10.1061/(asce)mt.1943-5533.0000282
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发表时间：
2011-08-01
影响因子：
3.2
通讯作者：
Magnusson, Rolf
中科院分区：
文献类型：
--
作者：
Edvardsson, Karin;Magnusson, Rolf
在碎石路上使用抑尘剂的一个重要问题是，它们在降雨期间往往会浸出。本研究的目的是通过实验室研究和现场研究来说明这个问题。毛细管上升和浸出抑制剂进行了检查，通过使用圆柱体填充的磨耗层材料。氯化物比木质素磺酸盐更倾向于通过毛细管上升向上输送，因此，它在较长的时间内表现出更有效的性能。发现用于最小木质素磺酸盐和氯化物浸出的细材料的最佳百分比分别为15重量%和10- 15重量%。氯化钙的离子似乎絮凝粘土颗粒，这可能会阻止他们浸出。为了研究一般细料的原位寿命，将碳酸钙（梅萨）用作标记物。碎石磨耗层中的细料必须定期补充。1年后梅萨丧失达80%。DOI：10.1061/（ASCE）MT.1943-5533.0000282。(C)2011年，美国土木工程师协会。
A significant problem when dust-suppressing agents are used on gravel roads is that they tend to leach during rainfall. The purpose of this study is to illustrate this problem by using laboratory studies and studies in situ. Both capillary rise and leaching of suppressants were examined by using cylinders filled with wearing course material. Chloride was more prone than lignosulphonate to transport upwards by means of capillary rise, and therefore, it showed a more effective performance over a longer period of time. Optimal percentages of fine material for minimal lignosulphonate and chloride leaching were found to be 15% by weight and 10-15% by weight, respectively. Ions of calcium chloride seemed to flocculate clay particles, which probably prevents them from leaching. To study the in situ longevity of fine material in general, calcium carbonate, mesa, was used as a marker. The fine material in gravel wearing courses must be replenished regularly. Mesa loss was up to 80% after 1 year. DOI: 10.1061/(ASCE)MT.1943-5533.0000282. (C) 2011 American Society of Civil Engineers.