zhangxiaosan
Legenda soseske
Pridružen/-a: 27.09. 2016, 06:54
Prispevkov: 1069
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 Objavljeno: 16 Jan 2017 12:05 Naslov sporočila: Treatment Measures of Asphalt Concrete Pavement Damage and M |
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<p>1. Rut (1) the surface layer and the grass-roots level of instability will form a rut laminated. (2) lane surface due to vehicle traffic, will produce vertical and horizontal rut, generally not deep, but easy to water, damage to the road. (3) grass-roots strength is not enough, poor water stability, so that the local subsidence caused by rutting. (4) surface layer is not enough compaction, porosity, traffic or in the corners, especially the overweight vehicles caused by the passage of the rut. (5) Asphalt concrete poor thermal stability, such as low softening point of asphalt, 60 ℃ viscosity difference, asphalt mixture of poor grades, too much asphalt, etc., in the summer high road temperature, easy to form rut.</p>
<p>Subsidence Subsidence is a surface phenomenon, the general cause are in the grass-roots, soil-based: (1) water content and void ratio are larger soft base, or contain organic substances in the clay layer, improper handling or not handled, Causing subsidence. (2) Filling embankment is located in paddy field, water net area, high groundwater level, improper handling during construction, resulting in subsidence of embankment, or silt in packing, no filling of large stone filling, high filling subgrade The degree of compaction is not enough, the short term is difficult to stabilize the emergence of soil-based non-uniform subsidence will cause subsidence. (3) subgrade soil moisture, groundwater developed or poor soil quality, the construction is not handled will cause subsidence. (4) the primary water stability is poor, poor grading, low density, strength will not be enough to form subsidence.</p>
<p>(1) layer of local asphalt mixture in the fine aggregate too much or concentrated, oil content is too large or in the corners of the car driving a level of thrust, easy to make the road surface with a package. (2) layer strength is not enough or water stability is not good, so that the grassroots soft and lead to package. (3) layer of water content is too large or surface layer of water seepage remain in the grass-roots surface and the surface layer to form a two-layer separation, traffic compaction to push the surface layer into a package.</p>
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