Quality Assurance Handbook for Rural Roads Volume-I - pmgsy

7. SECTION 1500: CEMENT CONCRETE PAVEMENT
7.1 Cement Concrete/ Semi-Rigid Pavements
1. Quality of Materials
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Quality Assurance Handbook for Rural Roads
(i) Check on the Manufacturer’s Certificate on the type/ grade of cement in use and results of
any tests carried out at site like the setting time.
(ii) Check on the cement storage features and the length of storage.
(iii) Check from the Quality Control Registers, the test results obtained on coarse aggregates,
fine aggregates and water used in cement concrete and on concrete blocks where block
pavement is to be constructed.
(iv) Check the Manufacturers’ Certificate on the admixture where used, pre-moulded joint filler
etc.
(v) Check the cement content, water/ cement ratio and dosage of plasticizer, where used, in the
mix design.
(vi) Check the results on 7 day and 28 day strength of concrete.
(vii) Check the results on concrete workability (Slump cone tests), one test per 4 cu m of concrete
at paving site or one test for each dumper laid at plant site.
(viii) Check on the results of aggregate gradation and moisture content.
(ix) Check the adequacy of plant/ equipment used for the manufacture and placement of concrete.
(x) Check whether a Trial Length was constructed and approved.
2. Quality of Workmanship
Check on the following
Width of pavement; permissible tolerances on edges of carriageway ±20 mm in plain/rolling
terrains, ±30 mm in hills.
Surface Levels : Check whether surface levels have been checked or not.
Surface Regularity : the max permissible undulations measured with 3 m Straight Edge = 6
mm.
Surface texture to be evaluated visually.
Adequacy of setting of concrete, quality of joints, the joint sealing compound used, joint
alignment and dimensions.
Straightness of side forms (steel)
Size, spacing, paralleling of dowel bars.