1 / 53

Workmanship and Tests During Construction Phase

Workmanship and Tests During Construction Phase. Presented by: Er . Bhagawan Shrestha. Specification. Definition:

sadah
Download Presentation

Workmanship and Tests During Construction Phase

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Workmanship and Tests During Construction Phase Presented by: Er. BhagawanShrestha

  2. Specification • Definition: A detailed description of the particulars of some projected work in building, engineering, or the like, giving the dimensions, materials, quantities etc, of the work, together with directions to be followed by builders or constructor.

  3. Back ground Prevailing Specification approved on July 2001 and enforced to use. Contains 31 sections including blank Section 300.

  4. DOR SPECIFICATIONS • SECTION 100 - GENERAL • SECTION 200– SITE CLEARANCE • Section 500 deals with QUALITY CONTROL • Section 600 deals with MATERIALS AND TESTING OF MATERIALS • Section 700 deals with PIPE DRAINS , PIPE CULVERTS AND CONCRETE CHANNELS • Section 900 deals with EARTHWORKS

  5. Section 500 –Quality Control contains: • 501 SCOPE • 502 CONTRACTOR RESPONSIBLE FOR THE • QUALITY OF THE WORKS • 503 QUALITY CONTROL SYSTEM • 504 QUALITY ASSURANCE PLAN • 505 TESTING PROCEDURES AND SETS OF • TESTS • 506 LABORATORY TRIALS • 507 SITE TRIALS • 508 CONTROL TESTING DURING CONSTRUCTION • 509 ACCEPTANCE TESTS FOR COMPLETED • WORKS OR PARTS OF THE WORKS • 510 SCHEDULE OF TESTS • 511 LABORATORY

  6. General All materials incorporated and all workmanship performed shall be strictly in conformity with the requirements of the Specifications and the Contractor shall be responsible for the quality of the works in the entire construction within the contract.

  7. Testing Procedures and Set of Tests • For ensuring quality of work, materials and workmanship be subjected to testing in accordance with procedures, sets of tests and frequencies as specified in Specifications • Specified testing frequencies are not restrictive • Engineer directs for the tests to be carried out as frequently as deemed necessary • Where no specific testing procedure mentioned in Specifications, tests be carried out as per prevalent accepted engineering practice or directions of Engineer

  8. Laboratory Trials • Laboratory trials/mixes be carried out by Contractor on materials proposed to be used in works in their natural state. • laboratory trials establish a relationship between specified requirements of end product and properties which can be determined in field for purpose of construction control.

  9. Site Trials • Materials, used for laboratory trial, composition of which meets specified requirements and is accepted by Engineer, shall then be used in site trials • Contractor shall submit the proposal for the site trials to the Engineer at least two weeks before

  10. Site Trials(contd.) • Site trials for laying and compaction shall be carried out by Contractor on all earthworks and pavement materials proposed for works using same equipment and methods proposed for use in works.

  11. Site Trials(contd.) • Site trials for concrete mixes as specified shall be carried out by Contractor to demonstrate suitability of his mixing equipment. During site trials, compliance with Specifications for weighing equipment, storage of ingredients, means of transport for concrete, placing, compaction and curing shall be checked by Engineer. During the site trial a full scale sequence including placing and compaction of concrete shall be carried out on a part of works which will represent particular difficulties due to presence of reinforcement, obstructions or others.

  12. Site Trials(contd.) Site trials demonstrates: • suitability of materials, • suitability of equipment for laying and compacting materials to specified density, and • confirmation of achievement of other requirement of completed works.

  13. Site Trials(contd.) • Each site trial (for earthworks & pavement) to be at least 100 m long and to full width and to the specified depth of materials. • Site trial be carried out at least 21 days ahead of commencement of related works.

  14. Site Trials(contd.) Data to be recorded for each site trial: • Composition and grading of material before site trial, • Composition and grading of material including bitumen content, • Moisture content at compaction and Optimum Moisture content for that specified compaction,

  15. Site Trials(contd.) iv. Equipment details like type, size and tyre pressures, frequency of vibration and number of passes made by compaction equipment, v. Maximum dry density measured on sample before site trials (Lab. Test), vi. Density achieved, vii. Compacted thickness of the layer

  16. Site Trials(contd.) • Contractor conducts 8 sets of tests on each 100m length of trial section for each level of compaction effort. • If all eight sets of results meet specified requirements for material and workmanship, site trial be deemed successful. • Data recorded in trial becomes agreed basis on which particular material be provided and processed to achieve specified requirements.

  17. CONTROL TESTING DURING CONSTRUCTION • All earthworks, pavement layers, and backfill to drainage and other structures shall be subject to control testing (process control) including, if required, testing by the Engineer in accordance with the Conditions of Contract and Clause 503. • The tests to be carried out and their frequency for the quality control of the works are detailed in the relevant Sections of these Specifications

  18. Testing Schedule (Example)

  19. Testing Schedule (Example)

  20. Acceptance testing • Contractor requests, in writing for Engineer's approval for each layer of each section of earthwork, pavement construction and backfill • Such request be accompanied by tests results required by Specifications. • Engineer inspects section for any visible defects including, heaving material (visible during compaction), segregation, and for uniformity of mixing and compaction

  21. Acceptance testing (contd.) • If visual aspects satisfactory Engineer tests Section of works submitted and informs Contractor in writing of results of tests specifying acceptance or rejection of section or layer concerned • Work on a layer in no circumstances commences until preceding layer been approved and accepted by Engineer in writing.

  22. Acceptance testing (contd.) • Contractor fully responsible for protecting and maintaining condition of work submitted for approval. • any layer left unprotected for more than 24 hours subsequent to approval shall again be subject to construction control testing, and tolerance checks. • Contractor responsible for making good any subsequent damage due to traffic, ingress of water or any other reason

  23. Section 600 contains • 601 SCOPE • 602 QUALITY OF MATERIALS • 603 SOURCES OF MATERIALS • 604 INSPECTION AND ACCEPTANCE OF MATERIALS • 605 MATERIALS AND MANUFACTURED ARTICLES • 606 DEFECTIVE MATERIALS

  24. Section 600

  25. Table 6.4: Tests Procedures Applicable to Disturbed/Undistributed Samples of Soils and Gravels

  26. Table 6.5 : Tests Procedures Applicable to Stone Aggregate and Fillers

  27. Table 6.11: Tests Procedure Applicable to Straight run Bitumen

  28. Table 6.12: Tests Procedure Applicable to cutback Bitumen

  29. Table 6.13: Tests Procedure Applicable to Bitumen Emulsion

  30. Table 6.6: Requirements on the Physical Characteristics of Cement

  31. CONCRETE The minimum frequency of sampling of concrete of each grade shall be as following: For 1-5 m3 quantity of work - 1 no. of sample For 5-20 m3 quantity of work - 2 no. of sample For 20 m3 and more quantity of work - 3 no. of sample plus one additional for each 20m3 or part thereof. At least one sample shall be taken from each shifts of work.

  32. Table 6.14: Specification for Straight run Bitumen The number of tests and criteria for conformity shall be as per IS 73.

  33. Table 6.15: Tests Procedure Applicable to Bituminous Mixtures

  34. 2401 GABIONS • Gabions shall consist of steel wire mesh crates. Steel wire shall be mild steel wire complying with NS 169-2045. • Weight of deposition of zinc shall be in accordance with NS 163-2045. Zinc coating shall be uniform and be able to withstand minimum number of dips and adhesion test specified as per NS 163-2045 • Wire shall be woven into hexagonal mesh with minimum of 3 twists

  35. 2401 GABIONS (Contd.) • Selvedge wire at least 3 gauges heavier than mesh wire • Gabion wire shall be tested for mass, uniformity and adhesion of zinc coating and tensile strength of the wire itself.

  36. Section 1200 (Contd.) • 1201 MECHANICALLY STABLE SUBBASE CONTAINS: • Scope • Sources of Materials • Material Requirements- (a) Gravel , (b) Sand, Silty and Clayey Sands, (c ) All Materials • Compaction Trials • Laying and Compaction

  37. Section 1200 (Contd.) 6. Proof Rolling 7. Setting out and Tolerances 8. Drainage of Subgrade and Subbase 9. Testing – (a) Process Control, (b) Routine Inspection and Testing 10. Measurement 11. Payment

  38. Mechanically Stable Sub base (Example) Table 12 .2 : Minimum Testing Frequency

  39. Construction & Workmanship Tests • Earthwork in cutting/Sugrade • Detern of Insitu MC • Detern of Insitu Density • Horizontal Alignment • Surface Level • Surface regularity

  40. Construction & Workmanship Tests • Granular Sub base • Gradation of In situ materials • LL/PL –PI of In situ materials • AIV of In situ materials • Detern of In situ MC • Detern of In situ Density • Compacted thickness • Horizontal Alignment • Surface Level • Surface regularity

  41. Construction Control Testing/Process Control Testing   Unless otherwise directed, values given in these Specifications are minimum values for the properties of materials and the workmanship. They shall be considered satisfactory, if all results of the tests, taken at the frequencies specified, are at least equal to the values given in the relevant Section of these Specifications

  42. THE END THANK YOU

More Related