Quality Assurance Handbook for Rural Roads Volume-I - pmgsy

Test 1
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Quality Assurance Handbook for Rural Roads
Refill the pit with the dug material without compacting. If the pit can be filled by using not more
than 65% of the dug material, it is indicative of adequate compaction and use of specified quantity
of all materials combined together.
Test 2
(ii) Separate out the portions of the WBM material passing and retained on 11.2 mm size sieve when
Type B Screenings have been used. Where Type A Screenings have been used, the proportions of
WBM material passing and retained on 13.2 mm size sieve should be determined.
(iii) Measure the loose volumes of the two portions using cylinders of known volume and compare
the combined volume with the combined specified quantities of Coarse Aggregate + Screenings +
Binding Material.
(iv) The volume of material retained on 11.2 mm size sieve (or 13.2 mm size sieve, as the case may be)
shall be compared with the specified quantities of coarse aggregate viz 0.91 to 1.07 cu m per 10 sq
m for WBM gradings 2 and 3. Due allowance shall be made for crushing during rolling.
(v) The material passing 11.2 mm size sieve (or 13.2 mm size sieve, as the case may be) shall be
compared with the specified quantities of Stone Screenings and Binding Material or Crushable
Screenings as the case may be.
(vi) For the Coarse Aggregates, the quality may be checked by conducting an Aggregate Impact Test
and determining the presence of any oversize aggregates.
(vii) For the finer fractions passing IS 425 micron size sieve, the Plasticity Index shall be determined to
check that it is less than 6.
3.3 SHOULDERS
1. Quality of Material in Shoulders
Check, by visual classification, the type of material used in the shoulders.
2. Degree of Compaction
Check the degree of compaction of the shoulder material by an insitu density test @ atleast one
test per km length, or part thereof. If it does not meet the specified requirement of 100% compaction,
two more insitu density tests should be conducted and all the 3 test results reported.
3. Cross fall
Determine the cross fall, using appropriate Straight Edge, on the shoulders. Check if the measured
cross fall is 1% higher than the camber on the main carriageway. If not, the same should be reported.
4. Provision of Brick/ Stone Block Edging
Check, if the quality of Bricks/ Stone Blocks used meet the specified requirements.
5. Provision of Gravel Shoulders
Where there is a provision of gravel shoulders in the Contract, check if the gravel used meets all
the quality requirements and has been compacted to the specified density.