zhangxiaosan
Legenda soseske
Pridružen/-a: 27.09. 2016, 06:54
Prispevkov: 1069
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 Objavljeno: 17 Nov 2016 04:37 Naslov sporočila: Prevention Measures of Asphalt Pavement |
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<p>According to the above-mentioned causes of asphalt pavement diseases, preventive measures were taken mainly from construction materials, design, construction, maintenance and traffic management. The pavement structure design and thickness calculation can meet the requirements of asphalt pavement strength and bearing capacity,Features and advantages of vibratory roller and solve the problem of load type crack. How to avoid or reduce the generation of non-load-type cracks, from the design and construction should be considered in two aspects.</p>
<p>(1) material aspects</p>
<p>Reasonable to determine the asphalt pavement structure, asphalt surface cracks mainly by the asphalt surface layer itself caused by low-temperature contraction. Selection of low temperature stiffness, ductility, poor temperature sensitivity, low wax content of high-quality asphalt, mineral aggregate selection, accurate gradation of asphalt surface layer of mineral aggregate and reasonable allocation of asphalt mixture ratio. The performance of asphalt mixture to control the amount of asphalt to ensure excellent performance of asphalt mixture, can effectively reduce the cracks.</p>
<p>(2) design aspects</p>
<p>In the semi-rigid pavement design, to meet the requirements of the stability of the premise, the preferred penetration of the bitumen asphalt surface to do more. Asphalt surface using dense asphalt concrete. The use of appropriate thickness of asphalt surface layer to ensure that the semi-rigid base during the use of generally not produce shrinkage cracks and shrinkage cracks. Well-designed, geologic survey of complex terrain to do a good job. Particular attention should be paid to strengthening the foundation, preventing uneven settlement due to weak foundation,classic crack sealing working principle filling the roadbed with qualified fillers, or filling the embankment with fillers to ensure that the roadbed has sufficient strength and stability so as to ensure a stable road surface Basis: choose anti-erosion performance, shrinkage coefficient and thermal shrinkage coefficient and low tensile strength of semi-rigid material to do the grass-roots level: the selection of high-quality asphalt asphalt surface; meet the requirements in the stability of the premise, should use penetration The bigger asphalt makes the asphalt surface.</p>
<p>(3) construction
Careful construction, choose advanced construction technology and mechanical equipment, formulate a perfect construction program to ensure that the degree of compaction to meet the specification requirements, in strict accordance with the design requirements of soft ground treatment, improve the soft ground treatment construction quality, strict control of semi-rigid base construction rolling When the moisture content of the mixture can not exceed the required compaction of the best water content or to control the construction code to allow the scope of the semi-rigid base after the completion of rolling. To timely health, to prevent the occurrence of cracks reflected to the surface layer to protect the moisture content of the mixture from loss; health end, should immediately spray through the oil layer and asphalt pavement as soon as possible.</p>
<p>(4) conservation aspects</p>
<p>Strict maintenance management, strengthen the road cleaning, to ensure good drainage performance. Timely scientific treatment of the cracks, to avoid further expansion of the disease.</p>
<p>(5) to strengthen traffic management
Strengthen the traffic management to limit the passage of large overload vehicles; continuous high temperature in the summer period,best advanced bridge expansion joint system the operation and management units can be arranged at night heavy vehicles, early morning low temperature road through: prohibit excessive wear on the pavement tires or more stringent restrictions use.</p> |
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