Quality Assurance Handbook for Rural Roads Volume-I - pmgsy

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3. Section-400 (ii) Slag The broad types of slag used in Base/sub-base construction are:- 1. Blast Furnace Slag 2. Granular Blast Furnace Slag 3. Steel Slag Physical characteristics of Blast furnace slag and steel furnace slag are given in Table 410.2 TABLE 410.2: TEST RESULTS SHOWING PHYSICAL CHARACTERISTICS OF BLAST FURNACE SLAG AND STEEL FURNAGE SLAG Physical Properties Test Method Blast Furnace Steel Slag Aggregate impact value (%) IS:2386 (Part 4) 18–24 8–11 Aggregate crushing value (%) IS:2386 (Part 4) 24–26 15–18 Los Angeles abrasion value (%) IS:2386 (Part 4) 28–32 9–10 Water absorption (%) IS:2386 (Part 3) 1.5–2.5 1–1.4 Specific gravity IS:2386 (Part 3) 2.65 3.22 It may be noted that some varieties of Steel Slag are found lacking in stability in the presence of water. Such varieties need to be left for weathering in stockpiles for sufficiently long periods of time to render them suitable for road works. In general, the unit weight of slag should not be less than 11.2 kN/m 3 . 2. Horizontal Alignment When used in subbase and base courses, the edges should be correct within tolerance limit of (±) 30 mm in plain and rolling terrain and (±) 50 mm in hilly terrain. 3. Surface Levels When used in sub-bases, the tolerance in surface levels will be (+)10 mm and (–) 20 mm. When used in base courses, the tolerance in surface levels will be restricted to (±) 10 mm. A grid of 10 m x 2.5 m may be formed to check the surface level. 4. Surface Regularity When used in sub-base courses, the maximum permitted difference between the subbase layer and 3 m straight edge should be 12 mm for longitudinal profile and 10 mm for cross profile. However, when used in base courses, the permitted differences should be 12 mm for longitudinal profile and 8 mm for cross profile. 5. Quality Control Tests (a) Flyash (Pond Ash) For use of flyash in embankment construction, the Quality Control tests given in Subsection 306 shall apply. For use of flyash in Lime-flyash stabilized soil subbase, the Quality Control tests given in Sub-section 409 shall apply. 74
(b) Slag 75 Quality Assurance Handbook for Rural Roads For use of flyash in Lime-flyash bound macadam, the Quality Control tests given in Sub-section 405 shall apply. For use of slag in a Gravel/Soil-Aggregate base/surface, the Quality Control tests given in Sub-section 402 will apply. For use of slag in WBM construction, the Quality Control tests given in Sub-section 405 will apply. For use of slag in Cement Treated Sub-base/Base, the Quality Control tests given in Sub-section 404 will apply. C. Do’s and Don’ts Do’s Don’ts 1. Flyash embankments should be covered on the sides and top by selected soil to prevent erosion. Thickness of earth cover on side slopes is typically 1 to 3 m. 2. The work on flyash embankment should be so organized that the supply of flyash to the site equals the Contractor’s demand for an efficient rate of placement. 3. The flyash to be used in road works should always be tested in the laboratory to ensure that it meets the required geotechnical properties or as a pozzolana as the case may be. 4. The compaction of flyash core and soil cover must be carried out simultaneously. 5. The lime used in Subbase/Base courses must have a purity of not less than 70% by weight of CaO. 411. CRUSHER RUN MACADAM BASE A. Methodology 1. Do not stockpile flyash at the site. 2. Do not transport flyash in open trucks without cover to avoid dust nuisance & environmental pollution. 3. Do not use crushed slag as coarse aggregate without laboratory testing and verifying that it meets all the specified requirements. 4. Do not use those varieties of steel slag which lack stability in the presence of water owing to the hydration of calcium oxide. If such varieties are to be used, these should be left for weathering in stockpiles for sufficiently long periods of time. 1. The existing surface to receive the crushed stone base should be prepared to the specified lines, grade and cross-section. All ruts, deformations and soft spots should be repaired and the surface compacted to the required density before placing the aggregate base thereon. 2. Lateral confinement for constructing the crushed stone aggregate base should be provided as per Sub-section 406. 3. The aggregate should be uniformly deposited on the prepared surface and distributed over the surface to the specified depth. After distribution, the material shall be blade mixed to full depth of layer by alternately blading the entire layer to the center and back to the edges of road. The material shall then be spread and finished to the required cross-sectional levels, lines and grades by means of suitable tractor –towed appliances. 4. Water should be applied before and during the blading, spreading and construction. 5. The layer shall then be compacted with the use of a smooth wheel roller of 80 to 100 kN or vibratory roller to 100% of maximum dry density determined as per IS:2720 (Part 7)
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Ministry of Rural Development Gover
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FOREWORD PREFACE ABBREVIATIONS QUAL
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Section 1100 PIPE CULVERTS 163 to 1
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PREFACE A good road network has an
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AE : Assistant Engineer AIV : Aggre
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1. BACKGROUND 1 Quality Assurance H
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3 Quality Assurance Handbook for Ru
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Material tests Workmanship tests Se
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2. Quality Management System (iii)
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2. Quality Management System A typi
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105. CONSTRUCTION EQUIPMENT 13 Qual
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B Do’s and Don’ts Do’s Don’
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201 & 202. SITE CLEARANCE A Methodo
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Page 34 and 35: 302. EARTHWORK IN CUTTING A. Method
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Page 42 and 43: B. Quality Control Requirements 1.
Page 44 and 45: SECTION 400 39 Quality Assurance Ha
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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
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Page 84 and 85: SECTION 500 BITUMINOUS 81 Quality A
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Page 102 and 103: 3. Section-500 5. Quality Control T
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Page 112 and 113: 3. Section-500 512. MODIFIED BITUME
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Page 116 and 117: Annex-III & IV DETERMINATION OF IN-
Page 118 and 119: SIMPLE/HANDFEEL TESTS 600 600.1 Bri
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Page 122 and 123: SECTION 600 121 Quality Assurance H
Page 124 and 125: 3. Section-600 4. Build the courses
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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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165 Quality Assurance Handbook for
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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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