Quality Assurance Handbook for Rural Roads Volume-I - pmgsy

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3. Section-1500 5 Mark location and type of the joints on either side of the surface of the sub-base, with red paint. (i) Contraction joints shall be mechanically sawn joints spaced 2.5 m to 3.75 m. Length of panel in the direction of traffic shall not be less than the width of the pavement. Joints shall be cut when the pavement is neither too soft nor too hard and is able to bear the weight of the machine and crew. Normally it may vary from 8 to 12 hours depending on weather conditions. (ii) Construction joints shall be butt joints and placed after a day’s work is over or when work is suspended for more than 30 minutes. (iii) Expansion joints shall be provided near bridges and slab culverts and consist of a bitumen impregnated joint/ premoulded synthetic joint filler board, about 20 mm thick, and dowel bars. (iv) Longitudinal joints shall be provided for a two-lane road and shall be saw-cut. 6 All side forms shall be of mild steel channels or fabricated plates with adjustable jacks at the back and of depth equal to the thickness of pavement. Plant, equipment and tools required for preparation and laying of pavement concrete are listed in Clause 1501.11.2 of Specifications for Rural Roads. 7 Pavement concrete shall be produced near the site, using approved concrete mixers of at least 0.2 cum capacity. Readymade concrete conforming to the specified properties of strength and workability may also be used. 8 Check the slump of concrete. It should be in the range of 30 mm ±10 mm 9 Concrete shall be placed between the side forms and shall be levelled with rakes and shovels. In concrete panels having acute angles, a bar mat of 10 mm dia ribbed steel bars at 150 mm center to center in both directions shall be provided at 50 mm below the top of slab, in the entire panel. 10 Around man-holes or other openings in pavement, place 12 mm thick pre-moulded board as per IS:1838 and bar mats before concreting. 11 Compact concrete by a vibrating screed supplemented by two internal vibrators. 12 As soon as practicable after compaction of concrete, smoothen the surface with a longitudinal float operated from the work bridge. Just before the concrete becomes non-plastic, it shall be textured with a long handled steel or fibre brush. 13 After completion of texturing , before the concrete has taken its initial set, the edges of the slab shall be carefully finished so as to leave the pavement edges smooth and true to line. 14 After completion of the finalizing operations, the surface of the pavement shall be covered with wet Hessian cloth, burlap or jute mats. They shall be maintained fully wetted and in position for 24 hours. Upon the removal of the wet covering out the end of 24 hours, the slab shall be thoroughly wetted and then cured by ponding or sprinklers. The slab shall be covered with sufficient sandy soil so as to produce a blanket of earth not less than 40 mm thick after wetting. The earth covering shall be thoroughly wetted while it is being placed in the surface and against the sides of the slab and kept thoroughly saturated with water for 14 days. The sand shall not be removed and shall thereafter remain in place till 28 days from date of casting so that the concrete has attained the required strength. 198
199 Quality Assurance Handbook for Rural Roads 15 After minimum of 28 days after casting the concrete pavement, joint groove at contraction joint shall be widened to 10 mm width and to a depth 18 to 20 mm and shall be sealed. B. Quality Control Requirements 1. Material (i) Cement Cement shall be capable of achieving the design strength and may be (a) Ordinary Portland Cement, 33 Grade IS:269 (b) Ordinary Portland Cement, 43 Grade IS:8112 (c) Ordinary Portland Pozzalana cement, IS:1489 (d) Portland Blast Furnace Slag cement, IS:455 (e) Ordinary Portland Cement (OPC), 53 Grade IS:12269, (to be used only when a part of cement is replaced by fly-ash.) (f) If the soil around has soluble salts like sulphates in excess of 0.5%, by weight of soil, cement used shall be sulphate resistant and shall conform to IS:12330. (ii) Admixture Chemical admixture conforming to IS:6925 and IS:9103 may be used to improve workability of concrete. Mineral admixture like fly-ash shall conform to IS: 3812. (iii) Aggregate (a) Aggregate for pavement concrete shall conform to IS:383 but with a Los Angeles Abrasion test value not more than 35% or Wet Aggregate Impact Value not exceeding 30%. The limits and deleterious material shall not exceed the requirements set out in IS 383. (b) The total chloride content expressed as chloride ion content shall not exceed 0.06% by weight. (c) Total sulphate content expressed as sulphuric anhydride (SO 3 ) shall not exceed 0.25% by weight. (d) Coarse aggregate shall be clean, hard, strong, dense, non porous and durable crushed stone or crushed gravel. The maximum size of coarse aggregate shall not exceed 25 mm. It shall not have a flakiness index more than 35% and water absorption exceeding 5%. (e) Fine aggregate shall be clean natural sand or crushed stone sand or a mixture of both. It shall not contain deleterious material beyond the following limits: Clay : 4% Coal and lignite : 1% Material passing Sieve No. 75 micron: 4% in natural sand and 15% in crushed sand. (f) Coarse and fine aggregates, after blending shall conform to the gradation requirements mentioned in Table 1501.1
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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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301. EMBANKMENT CONSTRUCTION A Meth
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(vii) Materials in a frozen conditi
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B. Earthwork for Subgrade (Cutting
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302. EARTHWORK IN CUTTING A. Method
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31 Quality Assurance Handbook for R
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B. Quality Control Requirements 1.
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SECTION 400 39 Quality Assurance Ha
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3. Section-400 (ii) Atterberg limit
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3. Section-400 C Do’s and Don’t
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3. Section-400 TABLE 402.2: GRADING
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3. Section-400 2. The pulverization
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3. Section-400 Table 403.3 : QUALIT
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3. Section-400 6. The cement stabil
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3. Section-400 6.3 Quality Control
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3. Section-400 14. In case the scre
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3. Section-400 TABLE 405.4: APPROXI
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3. Section-400 (ii) Grading Require
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3. Section-400 C Do’s and Don’t
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3. Section-400 408. Local materials
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3. Section-400 B. Quality control r
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3. Section-400 409. LIME-FLYASH STA
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3. Section-400 4. Surface Regularit
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3. Section-400 (ii) Slag The broad
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3. Section-400 6. The thickness of
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3. Section-400 2. Horizontal Alignm
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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 (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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Page 136 and 137: SECTION 800 CONCRETE FOR STRUCTURES
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Page 152 and 153: 1000 STEEL REINFORCEMENT A. Methodo
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Page 156 and 157: 1100: PIPE CULVERTS A. Methodology
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Page 178 and 179: 3. Section-1400 3. Give streamline
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Page 204 and 205: 3. Section-1600 The prescribed road
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Page 208 and 209: 1700. TRAFFIC SIGNS AND MARKINGS A.
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4. Section-300 Photo 1. Visual Clas
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259 Quality Assurance Handbook for
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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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