Quality Assurance Handbook for Rural Roads Volume-I - pmgsy

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31 Quality Assurance Handbook for Rural Roads 2. Ensure that the soil for subgrade meets the specified requirements in terms of physical properties and the specified CBR value for pavement design. 3. Compact each layer of the material in the subgrade at OMC (±) 2% to at least 100% of Maximum Dry Density as per IS:2720 (Part 7). 4. If the difference between the subgrade level (top of the sub-grade on which the pavement rests) and ground level is less than 300 mm and the ground does not have the needed 100% relative compaction with respect to IS:2720 (Part-7), loosen the ground upto a level 300 mm below the subgrade level, correct moisture content to OMC (±) 2% and compact in layers to 100% of the maximum dry density as per IS:2720 (Part 7). 5. If the subgrade soil does not possess the requisite engineering properties like highly plastic black cotton soil and other weak soils yielding very low soaked CBR values, the same should be improved in strength (CBR) and workability by treatment with additives like lime/cement etc. as described in sub-sections 403 and 404 or by mechanical stabilization. 6. In conditions where salt concentration is in excess of 0.2%, a capillary cut-off of coarse sand should be provided below the subgrade as shown in the drawings to check the upward movement of moisture from below. 7. For a road in cutting, prepare the subgrade in accordance with subsection 302 to receive a subbase course. 8. Ensure that the subgrade is compacted and finished to the design strength consistent with other physical requirements. 9. Maintain the surface of subgrade, at all times during construction, at such a cross fall as will shed water and prevent ponding. B. Quality Control Requirements 1. Materials (i) The material used for subgrades shall be soil, moorum, gravel, a mixture of these or any other approved material. Material considered unsuitable for embankment construction as per subsection 301 shall not be used for sub-grade. (ii) The material for subgrade shall be non-expansive in nature. (iii) Where an expansive clay with acceptable “free swelling index” value is used as a fill material in embankment, the sub-grade and top 500 mm portion of the embankment just below the sub-grade shall be non-expansive in nature. (iv) Any fill material which yields a maximum dry laboratory unit weight of less than 16.5 kN/ m 3 determined as per IS:2720 (Part 7) shall be considered unsuitable for use in subgrade. (v) The size of coarse material in the soil shall ordinarily not exceed 50 mm when placed in the subgrade. 2. Surface Level The permissible tolerances in surface levels of subgrade shall be (+) 20 mm and (-) 25 mm.
3. Section-300 3. Surface Regularity The maximum allowable difference between the subgrade and underside of a 3 m straight edge shall not exceed 20 mm for longitudinal profile and 15 mm for cross profile. 4. Quality Control Tests 4.1 The Quality Control Tests on Earthwork for Subgrade (in cutting or filling) and their frequency, prior to construction, shall be as per Table 301.4 (B). 4.2 The Field Quality Control tests during construction shall be as per Table 301.5. 4.3 The Quality Checks shall be as per Table 301.6 (B). C. Do’s and Don’ts 1. Do ensure that borrow area material for use in subgrade satisfies the specified requirements and design CBR. 2. Do ensure that all layers in sub-grade are compacted to 100% Proctor Density as per IS: 2720 (Part 7). 304. ROCK CUTTING I Rock Excavation A Methodology 1. Guidelines on Blasting Operations Ensure that- Do’s Don’ts 1. Do not proceed with sub-grade work until the foundation for sub-grade has been duly approved by the Engineer. 2. Do not allow construction traffic or other vehicular traffic over the prepared surface of sub-grade. (i) all the statutory laws, regulations, rules, etc. pertaining to the acquisition, transport, storage, handling and use of explosives are followed and information describing pertinent blasting method and procedures is furnished by the Contractor prior to starting the work. Detailed safety aspects are given in Annex-300.2 of Specifications for Rural Roads. (ii) the magazine for the storage of explosive is built to the designs and specifications of the Inspection General Explosives, Nagpur and located at the approved site. (iii) no unauthorized person is admitted into the magazine. (iv) no match sticks or inflammable material shall be allowed in the magazine. (v) all explosives are stored in a secure manner and such storage places shall be clearly marked. (vi) the blasting operations remain in the charge of competent and experienced supervisors and workmen who are thoroughly acquainted with the details of handling explosives and blasting operations. (vii) the blasting is carried out during fixed hours of the day, preferably during the mid-day luncheon hour or at the close of the work. 32
Page 2 and 3: Ministry of Rural Development Gover
Page 4 and 5: FOREWORD PREFACE ABBREVIATIONS QUAL
Page 6 and 7: Section 1100 PIPE CULVERTS 163 to 1
Page 8 and 9: PREFACE A good road network has an
Page 10 and 11: AE : Assistant Engineer AIV : Aggre
Page 12 and 13: 1. BACKGROUND 1 Quality Assurance H
Page 14 and 15: 3 Quality Assurance Handbook for Ru
Page 16 and 17: Material tests Workmanship tests Se
Page 18 and 19: 2. Quality Management System (iii)
Page 20 and 21: 2. Quality Management System A typi
Page 22 and 23: 105. CONSTRUCTION EQUIPMENT 13 Qual
Page 24 and 25: B Do’s and Don’ts Do’s Don’
Page 26 and 27: 201 & 202. SITE CLEARANCE A Methodo
Page 28 and 29: 301. EMBANKMENT CONSTRUCTION A Meth
Page 30 and 31: (vii) Materials in a frozen conditi
Page 32 and 33: B. Earthwork for Subgrade (Cutting
Page 34 and 35: 302. EARTHWORK IN CUTTING A. Method
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Page 40 and 41: 35 Quality Assurance Handbook for R
Page 42 and 43: B. Quality Control Requirements 1.
Page 44 and 45: SECTION 400 39 Quality Assurance Ha
Page 46 and 47: 3. Section-400 (ii) Atterberg limit
Page 48 and 49: 3. Section-400 C Do’s and Don’t
Page 50 and 51: 3. Section-400 TABLE 402.2: GRADING
Page 52 and 53: 3. Section-400 2. The pulverization
Page 54 and 55: 3. Section-400 Table 403.3 : QUALIT
Page 56 and 57: 3. Section-400 6. The cement stabil
Page 58 and 59: 3. Section-400 6.3 Quality Control
Page 60 and 61: 3. Section-400 14. In case the scre
Page 62 and 63: 3. Section-400 TABLE 405.4: APPROXI
Page 64 and 65: 3. Section-400 5.3 Quality Control
Page 66 and 67: 3. Section-400 (ii) Grading Require
Page 68 and 69: 3. Section-400 C Do’s and Don’t
Page 70 and 71: 3. Section-400 408. Local materials
Page 72 and 73: 3. Section-400 B. Quality control r
Page 74 and 75: 3. Section-400 409. LIME-FLYASH STA
Page 76 and 77: 3. Section-400 4. Surface Regularit
Page 78 and 79: 3. Section-400 (ii) Slag The broad
Page 80 and 81: 3. Section-400 6. The thickness of
Page 82 and 83: 3. Section-400 2. Horizontal Alignm
Page 84 and 85: SECTION 500 BITUMINOUS 81 Quality A
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3. Section-500 (iii) In the final l
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3. Section-500 3. The primer should
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3. Section-500 B. Quality Control R
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3. Section-500 TABLE 504.2: PHYSICA
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3. Section-500 5.3 Quality Control
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3. Section-500 (b) Bitumen The bind
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3. Section-500 TABLE 506.1 RATE OF
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3. Section-500 TABLE 507.1: NOMINAL
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3. Section-500 5. Quality Control T
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3. Section-500 TABLE 508.1.1 : QUAN
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3. Section-500 Table 508.1.3: QUALI
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3. Section-500 B. Quality Control R
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3. Section-500 (ii) Immediately the
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3. Section-500 512. MODIFIED BITUME
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3. Section-500 TABLE 512.5 : REQUIR
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Annex-III & IV DETERMINATION OF IN-
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SIMPLE/HANDFEEL TESTS 600 600.1 Bri
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119 Quality Assurance Handbook for
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SECTION 600 121 Quality Assurance H
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3. Section-600 4. Build the courses
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3. Section-600 (v) Storage of mater
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3. Section-600 3.3. Quality Control
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700 : STONE MASONRY FOR STRUCTURES
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(v) Stone Masonry 133 Quality Assur
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4.2. Tests / checks during construc
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SECTION 800 CONCRETE FOR STRUCTURES
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3. Section-800 2. Proceed with conc
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3. Section-800 TABLE 800.3: REQUIRE
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3. Section-800 c. The strength of a
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3. Section-800 4.2 Tests / checks d
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SECTION 900 149 Quality Assurance H
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3. Section-900 2. Lower centering g
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3. Section-900 C. Do’s and Don’
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1000 STEEL REINFORCEMENT A. Methodo
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3.2 Tests during construction 159 Q
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1100: PIPE CULVERTS A. Methodology
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SECTION 1200 167 Quality Assurance
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3. Section-1200 A2 Substructures Th
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3. Section-1200 4. Provide 75 mm ce
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3. Section-1200 (2) Tolerances 1200
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3. Section-1200 3.2 Tests / checks
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3. Section-1300 A-3 Toe Protection
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3. Section-1300 2. Stones for pitch
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3. Section-1400 3. Give streamline
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3. Section-1400 2. Tests during con
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3. Section-1500 5 Mark location and
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3. Section-1500 (iv) Water Water us
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3. Section-1500 TABLE 1501.3: QUALI
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3. Section-1500 2. Check the in-sit
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3. Section-1500 TABLE NO. 1502.3: P
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3. Section-1500 1503: RECTANGULAR C
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3. Section-1500 3.2 Tests during co
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3. Section-1500 1504: INTERLOCKING
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3. Section-1500 2. Quality Control
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3. Section-1600 The prescribed road
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3. Section-1600 C. Do’s and Don
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1700. TRAFFIC SIGNS AND MARKINGS A.
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1904 : MAINTENANCE OF BITUMINOUS SU
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4.6 Settlement and Upheaval 235 Qua
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2. Surface Finish 237 Quality Assur
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1908 : MAINTENANCE OF CULVERTS AND
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4. Quality Monitoring only in excep
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1. SECTION 100: GENERAL 1.1: Qualit
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10 5R 60 106 25 DIA WELDED 21 DIA 1
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4. Section-300 (b) Carry out an ins
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4. Section-300 Photo 1. Visual Clas
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Test 1 261 Quality Assurance Handbo
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4. Section-500 (iii) Check the aggr
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5. SECTION 1100:PIPE CULVERTS 267 Q
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6. SECTION 1300: PROTECTION WORKS A
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4. Section-1500 In case of cracked
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4. Section-1700 2. Road Markings C
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Appendix-1 1.4 Estimating Plasticit
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Appendix-1 1.8 Simple Gadgets for E
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Appendix-1 (ii) Make two identical
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Appendix-1 (ii) Workability: Take a
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Appendix-2 Curing : Covering the c
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Appendix-3 Sr. Code/ Title of the P
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Quality Assurance Handbook for Rura
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Quality Assurance Handbook for Rural Roads Volume-I - pmgsy

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