Quality Assurance Handbook for Rural Roads Volume-I - pmgsy

5.3 Quality Control Checks by AE/EE
The quality checks to be exercised by AE/EE are indicated in Table 507.7.
C. Do’s and Don’ts
508. 20 mm THICK PREMIX CARPET
Table 507.7 : QUALITY CONTROL CHECKS BY AE/EE
508.1 Open graded Premix Surfacing using Bitumen
A. Methodology
101
Quality Assurance Handbook for Rural Roads
Stage Test Frequency Designation of
Inspecting Officer
1. Finished Course (i) Uniform spread of aggregate Whole length AE
of Surface Dressing
(ii) Any defects in the form of Loss
of Aggregate/ Streaking etc
-do- AE
(iii) Surface Regularity and
Transverse profile
Random Checking EE
Do’s Don’ts
1. Ensure correct rate and uniform spread of binder
based on field trials.
2. Add approved Anti-Stripping agent to binder where
aggregate fails to pass the stripping test.
3. Alternatively use precoated chips.Correct any
excessive deposit of bitumen by blotting before
spreading the chips.
1. Do not carry out work when atmospheric temperature
is less than 100C or when weather is foggy, rainy or
windy.
2. Do not carry out the work on wet surface.
3. Do not resort to excessive rolling as that may crush
the stone chips.
4. Do not allow traffic to ply on any newly laid surface
dressing till the following day except with restricted
speed.
1. Prepare the base on which premix carpet is to be laid to the specified lines, grade and crosssection.
2. Apply a prime coat followed by tack coat over a granular base preparatory to laying of the carpet.
3. The quantities of material required for 20 mm thick premix carpet should be as indicated in Table
508.1.1.