Quality Assurance Handbook for Rural Roads Volume-I - pmgsy
Quality Assurance Handbook for Rural Roads Volume-I - pmgsy
Quality Assurance Handbook for Rural Roads Volume-I - pmgsy
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B. <strong>Quality</strong> Control Requirements<br />
1. Material<br />
(a) Flyash (Pond Ash):<br />
37<br />
<strong>Quality</strong> <strong>Assurance</strong> <strong>Handbook</strong> <strong>for</strong> <strong>Rural</strong> <strong>Roads</strong><br />
Particle size analysis, Maximum Dry Density and Optimum Moisture Content as per IS:2720 (Part-<br />
7), Graph of dry density plotted against moisture content <strong>for</strong> this test shall be submitted <strong>for</strong> approval<br />
of Engineer, be<strong>for</strong>e execution of work.<br />
(b) Soil:<br />
Soil <strong>for</strong> cover to the flyash embankment shall satisfy the requirements of a suitable material <strong>for</strong><br />
embankment construction as per sub-section 301.<br />
(c) Sub-grade:<br />
Sub-grade shall con<strong>for</strong>m to the requirements of sub-section 303.<br />
2. <strong>Quality</strong> control tests and their frequency shall be as indicated in Table 301.4 to 301.5.<br />
C Do’s and Don’ts<br />
1. Check the placement moisture content of fill material<br />
which should be within (±) 2% of the OMC.<br />
2. Place subsequent layer only after finished layer has<br />
been tested <strong>for</strong> density requirements and duly<br />
approved by the Engineer.<br />
3. Remove the material in soft areas where requisite<br />
density requirements have not been achieved and<br />
replace the same by approved material, bring<br />
moisture content to permissible limits and recompact<br />
to the required density.<br />
4. Do transportation of fly-ash, normally at night.<br />
307. SURFACE DRAINS<br />
A. Methodology<br />
Do’s Don’ts<br />
1. Do not allow addition of side cover subsequent to the<br />
construction of the flyash core.<br />
2. Do not allow traffic in areas where flyash is temporarily<br />
stockpiled and kept moist to avoid dusting.<br />
3. Do not allow construction traffic or other vehicular<br />
traffic directly over the prepared surface of<br />
embankment/ sub-grade.<br />
1. Ensure that the surface drains/roadside ditches are provided strictly according to the Drainage<br />
Plan <strong>for</strong> the road.<br />
2. Excavate to the specified lines, grades, levels and dimensions.<br />
3. Remove all excavated material from the area adjoining the drains. If the excavated material is<br />
found suitable, utilize in embankment/sub-grade construction, otherwise dispose of the material<br />
away from the road site.<br />
4. Ensure that the excavated bed and sides of the drains are in con<strong>for</strong>mity with the specified<br />
dimensions, levels and slopes.