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Assessing Maintenance Needs:
Maintenance needs can be assessed by a careful inspection of roads at regular intervals, observing defects such as :
The modern method of assessing the riding quality of a road is by a Bump Integrator machine, towed by a vehicle at a speed of 30 Km/hr. The Bump Integrator (BI) value is expressed in mm/Km. The following gives the rough guide for BI value.
Table: Typical bump Integrator Values in mm/Km
A simple method of assessing the condition of a low volume rural road is by means of a Pavement Condition Index (PCI). The PCI value ranges from 1 (Very Poor) to 5 (Very Good) and can be assessed by one of the following methods :
(a) Based on visual inspection
(b) Based riding comfort, when travelling at 50 Km/hr speed
(c) Based on comfortable driving speed possible
Table : PCI Value Based on Visual Inspection
explain in a simple way
Most of the existing rubber dams are of air-filled types. Water-filled rubber dams aren't preferred for the below reasons: (i) By giving same sheet length and dam height, tensi
explain the point of contraflexure
how to construct road in hilly areas
CASTE DISCRIMANIMATION
Define Corrosion - Deterioration of Steel Structures? Corrosion is the principle cause of deterioration of steel structures. Corrosion of steel is an electrochemical process th
The Figure 1 below shows a section through a stairway for a garage in a new proposed dwelling. The stairway is 3 meters wide with 300 mm wide treads(7 treads) and 170 mm high riser
grading surface area of Aggregate
When a dam is to be built, a diversion tunnel is usually bored by solid rock next to the dam site to bypass the dam construction site. The dam is built while the river flows by the
One pump lifts storm water from a storage tunnel wet well a constant vertical distance of 150 ft. The equivalent length Le of the 14 in diameter piping is 1,000 ft. Pressure drop d
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