 Random Photo |
2
Rogoźno 2003
|
| Users Online | Guests Online: 2
No Members Online
Registered Members: 1049
Newest Member: elizabara51
|
| Top 5 links | |
| Mini statistics | Members : 1049
Download mp3 : 5709
View photo : 22369
View Links : 262140
|
|
|
| Author |
Asphalt Pavement Maintenance knowledge |
fengqingxue
Member
Posts: 4185
Location: newyork
Joined: 18.01.16 |
|
<p>1.Asphalt Pavement common diseases are: cracks ruts, broken, weeping, loose, water damage and pits, subsidence, mound.</p>
<p>2.From the crack manifestations can be divided into transverse cracks, longitudinal cracks and cracks in three kinds of mesh.</p>
<p>3.The main factors affecting the cracks are: variety and grade asphalt, asphalt mixture composition, the surface layer thickness of base material shrinkage, soil and climatic conditions and other groups.</p>
<p>4.The main reason for the formation of longitudinal cracks are: reason foundation, roadbed construction reasons, water infiltration and sabotage.</p>
<P>5.The main reason for the formation of transverse cracks are: material shrinkage, temperature shrinkage of concrete and asphalt, differential settlement.</P>
<p>6.The main reason Rut are: asphalt aggregate ratio is too large, excessive surface wear, rain Invasive internal asphalt concrete, grass-roots containing unstable mezzanine leading to the formation of the waveform Sideway push rut.</p>
<p>7.Asphalt Pavement Water Damage major failure modes are: network crack, pothole, slurry pump, Rut.</p>
<p>8.The formation of pits can be attributed to water damage and damage to two main aspects of oil.</p>
<p>9.Currently pit road repair method according Pavement repair equipment is divided into two kinds: cold fill and hot fill method.</p>
<p>10.Cause weeping: Mixture composition poorly designed, mixing the mixture control is lax, sticky layer of oil consumption inappropriate, poor quality of construction, water damage.</p>
<p>11.Excessive amounts of asphalt to produce asphalt surface is the main reason for weeping.</p>
<p>12.Q:For transverse cracks at the grass-roots cracking caused by reflective cracking of asphalt and concrete shrinkage caused by temperature treatment Methods.</p>
<p>A:For the base cracking caused by transverse cracks and reflection cracks of asphalt concrete shrinkage caused by temperature as small slit width can not be processed, such as the width of 3mm or more, the gap may be brushing clean with compressed air after blowing dust, the use of hot asphalt or emulsified asphalt crack filling material spreading method closure.as the slit width 5mm or more, can be seam debris removal, after the cracks along with compressed air or blowing slot, use sand or fine-grain material type hot mix asphalt filler tamping, and sealed with a soldering iron.</p>
<p>13.Q rocessing method and the passage of rutting?
A:For continuous length does not exceed 30m, tread groove depth is less than 8mm, the feeling of driving a small swing,by baking pavement, harrowing, after adding appropriate new material can be compacted.when worn asphalt surface, horizontal passage of time, should be cleared unstable layer, with a milling machine nap, re-surfacing layer.when the base or subgrade instability, treatment should be reinforced, and then repair the surface layer.for rutting due to poor construction quality caused by the grass-roots, goes in line before re-paving the surface layer to handle weak grassroots.</p>
<p>14.Q:The main reason of loose asphalt generated?
A:Local grassroots uneven roadbed and pavement damage caused by subsidence.Gravel contains weathered particles after water intrusion caused by peeling asphalt.with the increasing use of time, combined with asphalt adhesive properties of the material itself decreases, prompting asphalt surface layer and the contact portion of the tire wear, resulting in reduction of asphalt content, fine aggregate loss,mechanical damage or oil pollution.</p>
<p>Related Sites:<br />
China Cheap Covers Cutting Machine<br />
Large Led Emergency Light Construction Preparation<br />
Good Poor Quality Cement Pavement Humidifier<br />
Professional Road Mine Construction And Technical Maintenance
</p> |
|
|
|
|
| Guest | |
|
|
