CE LABORATORY

• Contractor's responsibilities for providing and maintaining field offices and testing laboratories:

  • Include necessary electricity, water, drainage, and telephone services
  • Offices and laboratories must have the prescribed floor area and specified equipment supplies and furnishings
  • Testing Equipment supplied in accordance with special provisions should be located in testing laboratories as required by the Engineer
  • All facilities provided by the Contractor shall be near the job site and shall conform to the best standard for the required types
• If field offices and laboratories are to be erected on private property:

  • Contractor is responsible for arrangements with landowners and removal or transfer of improvements upon completion of the works
  • All facilities provided by the Contractor shall revert to the Government at the end of the Contract, unless otherwise specified
• Contractor's obligations regarding laboratory staff:

  • Provide qualified and experienced staff for materials quality control and tests specified in the Contract
  • The appointed laboratory manager must be experienced in the work, work full time, and be subject to the approval of the Engineer
• Contractor's responsibilities for communication services:

  • Provide a separate telephone connection direct to the telephone company’s exchange for the exclusive use of the Engineer and his staff
  • Provide a two-way radio communication service if required
• Contractor's obligations for portable offices:

  • Portable offices required in the Contract shall be dismantled, moved, and erected as directed by the Engineer
  • All offices, stores, and testing laboratories shall be proficiently guarded, cleaned, supplied, and maintained for the duration of the Contract
• Contractor's obligations for vehicles for the Engineer:

  • Provide vehicles listed in the Special Provisions within 30 days after notice to commence work
  • Vehicles must comply with relevant laws, statutes, and regulations, and have comprehensive insurance
  • Vehicles shall be new, driven by a competent driver, maintained in first-class condition, and supplied with appropriate fuel and lubricants at all times
• Contractor's obligations for assistance to the Engineer:

  • Provide all equipment, instruments, apparatus, information, records, chainmen, and laborers required by the Engineer for inspecting and measuring the Works
• Contractor's obligations for record photographs:

  • Provide record photographs at intervals of not more than one month as directed by the Engineer
  • Provide proof prints and copies of the photographs, with the retained photographs becoming the property of the Government
• Measurement and Payment:

  • Lump-sum items shall be provided for the provision of office buildings, laboratory buildings, and survey equipment for the Engineer
  • No separate payment for consumable materials as it is included in the pay item for maintenance of the Engineer’s facilities
• Measurement and Payment:

  • Quantities for the provision of vehicles for the Engineer shall be the number of each type of vehicle supplied
  • Quantities for the operation of vehicles for the Engineer shall be for the time the Engineer is supplied with each vehicle before they become the property of the Government
• Measurement and Payment:

  • Quantities for progress photographs shall be the number of selected and provided progress photographs
  • Payment for the determined quantities shall be made at the appropriate contract unit price shown in the Bill of Quantities
• Contractor's requirements for offices, shops, stores, workshops, latrines, housing, and messing accommodations:

  • Must be provided and maintained by the contractor
  • Should be located in the Contractor’s compound, distinct and separate from the Engineer’s compound
  • Location, dimensions, and layout subject to Engineer's approval
  • Temporary buildings or structures on the site require written permission from the Engineer
• Contractor's obligations for a medical room and first aid facilities:

  • Must provide and maintain a waterproof medical room with necessary supplies
  • Employ a fully trained Medical Aide on-site
  • Location and arrangements must be known to all employees
  • Compliance subject to Engineer's and Medical Officer's approval
• Work prescribed in the Medical Room and First Aid Facilities section is not measured and paid separately but included in pay items for other work
• Earthworks involve the removal or placement of soils and other excavated material during construction, common in Civil Engineering Works for roads, railways, land stabilization, and land grading
• Item 100 - Clearing and Grubbing:

  • Consists of clearing, grubbing, removing, and disposing all vegetation and debris
  • Payment under different pay item numbers for various tasks like clearing and grubbing, individual removal of trees (small and large)
• Item 101 - Removal of Structures and Obstructions:

  • Involves the removal and disposal of buildings, fences, structures, old pavements, and other obstructions not designated to remain
  • Payment under different pay item numbers for tasks like removal of structures and obstructions, individual removal of trees (small and large)
• Item 102 - Excavation:

  • Consists of roadway drainage and borrow excavation with material disposal
  • Payment under different pay item numbers for tasks like unsuitable excavation, surplus common excavation, surplus rock excavation, and surplus unclassified excavation
• Definitions related to excavation types:

  • Unsuitable Excavation: contains organic matter unsuitable for embankment construction
  • Surplus Common Excavation: excess material cut for fill, disposed of outside the project site
  • Surplus Rock Excavation: excavation of hard, compacted, or cemented materials requiring blasting or special equipment
  • Surplus Unclassified Excavation: excavation of all encountered materials, including rock, regardless of nature or removal method
• Structure Excavation:

  • Consists of necessary excavation for foundation of bridges, culverts, underdrains, and other structures not otherwise provided for in the specifications
  • If excavated materials are washed, the volume involved must be reported for quality control adjustments
  • Tests required for excavated materials incorporated into the work include Grading Test, Plasticity Test (LL, PL, PI), and Laboratory Compaction Test
• Payment for Structure Excavation is made under different categories like Bridge Excavation, Foundation Fill, Excavation ordered below Plan Elevation, Shoring, Cribbing, and related work, and Pipe culverts and drain excavation
• Suitable Material for embankments includes material acceptable in accordance with the Contract, which can be compacted as specified, and can be common material or rock
• Unsuitable Material for embankments includes materials containing detrimental quantities of organic materials, organic soils like peat and muck, soils with specific liquid limits and plasticity indexes, soils with very low natural density, and soils that cannot be properly compacted
• Tests required for embankments include Grading test, Plasticity Test (LL, PL, PI), and Laboratory Compaction Test
• For each 500 m2 of each layer of compacted fill or fraction thereof, at least one group of three in-situ density tests are required
• Payment for Embankment is made under different categories like Embankment, Selected Borrow for topping (Case 1 and Case 2), and Earth Berm
• Embankment:

  • An artificial mound constructed using earthen materials like stone and soil, properly compacted, to support the raising of roadway or railways above the level of the existing surrounding ground surface
  • Embankments shall be constructed of suitable materials, in consonance with specific definitions
• Subgrade preparation is a crucial step in road construction, ensuring a solid foundation for the pavement structure
• Factors affecting subgrade performance include load-bearing capacity impacted by compaction, moisture content, and soil type, as well as volume changes due to excessive moisture or freezing conditions
• Construction equipment for subgrade includes excavators, air compressors with pavement breakers/jack hammers, tippers/dumpers, motor graders, vibratory compactors, tractors, and crawler dozers
• Subgrade construction process involves marking the limits of filling using batter pegs, building a layer 300mm wider than designed dimensions, trimming surplus material after proper compaction, cutting continuous horizontal benches into existing slopes where fill is deposited, and removing topsoil from borrow areas
• Subgrade preparation involves excavating soil from approved borrow areas, transporting it for subgrade, and spreading material in uniform layers not exceeding 250mm of compacted thickness
• Subgrade level tolerance specifications include permitted variations in the level of the surface, surface irregularity measured by a 3m straight edge, crossfall or camber, and longitudinal grade over a 25mm length
• Payment for subgrade preparation is made under different pay item numbers based on the type of material used
• Compaction is the process of increasing the density of soil by mechanical means, resulting in the rearrangement of soil particles and reduction of voids
• Compaction can be carried out by vibration, impact, kneading, or pressure, depending on the soil type, whether cohesive or granular
• Compaction equipment and density control strips are used to determine the density requirements of selected embankments, subgrade, bases, and bituminous concrete
• Overhaul in civil engineering refers to a specific aspect of earthwork and excavation, with the overhaul distance representing the distance over which material is transported during excavation
• The unit of measurement for overhaul distance can be cubic meters multiplied by the distance, quantifying the volume of material moved over a specific distance during construction
• Payment for overhaul is made under specific pay item numbers based on the type of overhaul