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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5.2 Tests During Construction<br />
95<br />
<strong>Quality</strong> <strong>Assurance</strong> <strong>Handbook</strong> <strong>for</strong> <strong>Rural</strong> <strong>Roads</strong><br />
The quality control tests to be carried out during construction are indicated in Table 505.3.<br />
Table 505.3 : QUALITY CONTROL TESTS DURING CONSTRUCTION<br />
Type of Test Frequency<br />
1. Rate of spread of binder At least one test daily<br />
2. Rate of Spread of aggregates -do-<br />
3. Aggregate Grading (IS:2386 Part 1) -do-<br />
4. Temperature of binder during spraying Regularly, at close intervals<br />
5. Thickness of compacted layer At random<br />
5.3 <strong>Quality</strong> Control Checks by AE/EE<br />
The quality checks to be exercised by AE/EE are indicated in Table 505.4.<br />
TABLE 505.4 : QUALITY CONTROL CHECKS BY AE/EE<br />
Stage Test Frequency Designation of<br />
Inspecting Officer<br />
Completed layer of Built-up Surface Regularity and Random Checking EE<br />
Spray Grout/Modified<br />
Penetration Macadam<br />
Transverse profile<br />
C. Do’s and Don’ts<br />
Do’s Don’ts<br />
1. Ensure that aggregates con<strong>for</strong>m to grading specified<br />
and are dry and clean at the time of laying.<br />
2. Maintain the temperature of bitumen appropriate to<br />
the grade of bitumen.<br />
3. Remove excessive deposits of binder during spray<br />
operation.<br />
506. MODIFIED PENETRATION MACADAM<br />
A. Methodology<br />
1. Do not undertake the work in foggy. rainy or windy<br />
weather or when the atmospheric temperature in the<br />
shade is less than l00C. 2. Do not allow any traffic over Built up spray grout<br />
without laying wearing course or seal coat.<br />
1. Prepare the base on which modified penetration macadam course is to be laid to the specified<br />
lines, grade and cross-section.<br />
2. Apply a tack coat, over the base preparatory to laying of the modified penetration macadam.<br />
3. Ensure that the coarse aggregates comply with the physical requirements laid down in Table<br />
504.2. The coarse and key aggregates shall be 40 mm size hand broken metal and 12 mm size stone<br />
chips respectively. Upto 30% of total quantity of 40 mm metal may be crusher broken. The quantities<br />
of material shall be as per Tables 506.1 and 506.2.