/Business/Pavement Preventive Maintenance
Pavement Preventive MaintenanceBUSINESS
Asphalt, SBS, Natural Rubber and Silica are added, forming asphalt which is manufactured in adding of oil to give flexibility according to change of atmosphere temperature, it is construction method to maximize adhesion ability using untraviolet ray heating equipment that thermal efficiency can be maximized.
Crack by temperature change (Temperature Shrinkage Crack)Asphalt pavement road occurs contraction by volumetric decrease from evaporation, condensation, outflow of oil substance and oxidation and then crack is proceeded. In case of teperature drop and asphalt hardning, asphlat plane pressure generates crack in longitudinal and transverse, transverse crack begins first in case of wide road. Logitudinal crack is in-line crack, it is occurred that horizontal pressure can not spread uniformly, this logitudinal crack is occured at the joint portion of pavement construction.
Crack by pavement's fatigue (Fatige Crack)Crack is occured by vertical pressure and basic floor change according to vehicle driving. Crack according to fatigue appears in shape of block generally. This cause results from aspjalt sustance of surface layer and weak ground of road upper layer, basic floor. Also, it is called edge crack to be occured phenomenon according to fatigue of road pavement.
Reflective CrackWhen it is overlay pavement on convetion pavement road without repair of crack, crack is occurred on overlay layer by shear force from wheel load of pavement layer upper portion. It occurs interactional crack or reflection crack on ovelay pavement.
Airport Runway - Before Construction
Park Lot - Before Construction
Local Road - Before Construction
Airport Runway - After Construction
Park Lot - After Construction
Local Road - After Construction
It is construction method to fill elastic seal material at facing portion between concrete pavement main road and road shoulder masonry joint, prevent ground sinkage, prevent image degrade by weed growth, protect safety of driver.
|Cone Penetration (25℃)||Under 90||56.4||OK||ASTM D 5329|
|Elasticity Recovery Rate(25℃)
(Original State Recovery Rate)
|All serene||All serene||OK|
|Adhesivity(-29℃, 50%)||All serene||All serene||OK|
|Softning Point(℃)||Over 80℃||90.5||OK||ASTM D 36|
Preventive maintenance is a way to maintain conventional road economically, it's a construction method to prevent performance deteriation preserving public usage of roas before deteriation of conventional function due to severe breakdown of convetional road.