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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
Shrinkage of concrete in prestressed members The shrinkage of concrete in prestressed members results in a shortening of ensioned wires and hence contributes to the loss of st
State the Moulds in Prestressed Concrete Moulds for pre-tension work should be sufficiently strong and rigid so that they can withstand the effects of placing and compacting th
Joint sealant must be designed and constructed to allow free extension and compression during the opening and closure of joints. In case joint sealants are attached to joint filler
Q. Explain the design of graded filter? Use of graded filter has been traditionally used below the revetment and protection works. The material used in the granular / graded fi
Good evening. I have two homework projects from the Soil Mechanics. I am interesting if anybody can solve them.
Pre-tensioning systems In the previous unit we have seen different steps in a pretensioning operation. Tendon wires or strands (formed as a rope type arrangement made of sever
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Define the Planning an Underwater Inspection? Planning for underwater inspection is important because of - Unknown factors which may be discovered during the diving - Th
curing of brick masonry
AFor the given reinforced concrete moment frame school building determine; 1. The wind load acting on the middle truss in the roof truss assembly. 2. The net wind pressure (Wnet) o
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