Quality Assurance Handbook for Rural Roads Volume-I - pmgsy

3. Section-500
(b) Bitumen
The binder should be paving bitumen of penetration grade complying with IS:73 or an
appropriate grade of emulsion complying with IS:8887, where permitted or specified in the
contract.
2. Horizontal Alignment
The edges of the Built-up Spray Grout layer should be correct within a tolerance limit of (±) 30
mm in plain and rolling terrain and (±) 50 mm in hilly terrain.
3. Surface Level
The tolerance in surface level of the Built-up spray grout should be (±) 6 mm.
4. Surface Regularity
The maximum allowable difference between the road surface and a 3 m straight edge should be
12 mm for longitudinal profile and 8 mm for cross profile.
5. Quality Control Tests
5.1 Tests Prior to Construction
The quality control tests to be carried out prior to construction are indicated in Table 505.2.
TABLE 505.2 : QUALITY CONTROL TESTS PRIOR TO CONSTRUCTION
Type of Test Frequency
1. Quality of Binder (Straight-run Bitumen) (IS:73)
(a) Penetration Test One test per lot
(b) R&B Softening Point Test -do-
(c) Ductility Test -do-
2. Quality of Binder (Modified Bitumen) (IS:15462)
(a) Penetration Test -do-
(b) R&B Softening Point Test -do-
(c) Elastic Recovery Test(d) Separation Test -do-
3. Aggregate Impact Value Test (IS:2386 Part 4) One test on representative sample per km length
from each source identified by the Contractor
4. Flakiness Index Test (IS:2386 Part 1) -do-
5. Bitumen Stripping of Aggregate Test (IS:6241) -do-
6. Water Absorption (IS:2386 Part 3) -do-
7. Soundness Test, if water absorption of aggregate -doexceeds
2% (IS:2386 Part 5)
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