Journal of Construction Engineering / 2016 / Article / Tab 1

Research Article

Management of Highway Projects in Egypt through Identifying Factors Influencing Quality Performance

Table 1

Factors influencing quality level of highway projects.

Sr.Effective factor

1Group (): managerial-related factors

F1.1Clarity of responsibilities and roles for each owner, consultant, and contractor
F1.2Develop a clear and detailed program for quality management to be adhered to by the owner, consultant, and contractor
F1.3Efficiency of the owner’s inspection team
F1.4Assignment of quality control responsibility to the consultant
F1.5Technical assessment of the contractor during the bidding process
F1.6Selection of the lowest bidder to construct the project
F1.7Contractor’s past experience
F1.8Contractor’s financial status during the project execution
F1.9Amount of work subcontracted
F1.10Contractor’s labors and equipment capability
F1.11Cost escalation of resources (materials, labors, and equipment) needed to achieve the required quality level
F1.12Unavailability of financial incentive to the contractor to produce higher level of quality
F1.13Delay in contactor progress payment

2Group (): design and specifications-related factors

F2.1Pavement is not designed according to the regional conditions (e.g., soil type, temperature, and traffic volume)
F2.2Design errors arising from inadequate engineer assumptions and inaccurate data
F2.3Insufficient owner involvement during the design phase (design evaluation, review, and updating design)
F2.4Accuracy of investigation performed on soil type encountered
F2.5Accuracy of data related to traffic volume, composition, and expected growth
F2.6Use construction materials suitable for climate (temperature)
F2.7Clarity and accuracy of specifications in relation to aggregates quality and gradation
F2.8Clarity and accuracy of specifications in relation to asphalt quality and type
F2.9Clarity and accuracy of specifications in relation to the required compaction level
F2.10Overspecifying of materials and equipment to be used and construction method to be followed
F2.11Limitation on materials sources, equipment type, and construction method imposed by specifications
F2.12Job mix formula type used to produce asphalt mixture (open graded, dense graded, etc.)
F2.13Asphalt mixture properties (e.g., stability, durability, and workability)

3Group (): construction process-related factors

F3.1Availability of experienced staff in the owner’s and contractor’s teams during the project execution
F3.2Availability of the specified materials quality
F3.3Asphalt quality and type used in the construction process
F3.4Aggregates quality used in the construction process (e.g., gradation, shape, and type)
F3.5Variation in aggregates gradation in stockpiles, mixing, transportation, and placement operation
F3.6Variation in asphalt content during mixture operation
F3.7Amount of filler materials in the mixture
F3.8Continuous changing in mix design due to change in the nature and source of materials during construction phase
F3.9The use of marginal materials in pavement constructed in regions of hot climate and heavy loading traffic conditions
F3.10Condition of road bed soil
F3.11Uniformity of mixture placement and compaction operations constructed in regions of hot climate and heavy loading traffic conditions
F3.12Compacting pattern used to achieve the desired pavement density
F3.13Paver and roller mechanical condition and type

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