Specification Part 3 - Road & Bridge Works - Urban Administration ...

A few cores may be cut as per the instructions of the Engineer to check segregation or any other
deficiency.
601.7.4. The hardened concrete shall be cut over 3 m width and reversed to inspect the bottom
surface for any segregation taking place. The trial length shall be constructed after making
necessary changes in the gradation of the mix to eliminate segregation of the mix. The lower
surface shall not have honey combing and the aggregates shall not be held loosely at the edges.
601.7.5. The trial length shall be outside the main works. The main work shall not start until the
trial length has been approved by the Engineer. After approval has been given, the materials, mix
proportions, moisture content, mixing, laying, compaction plant and construction procedures shall
not be changed without the approval of the Engineer.
601.8. Tolerances for Surface Regularity, Level, Thickness, Density and Strength
The tolerances for surface regularity, level, thickness, density and strength shall conform to the
requirements given in Clause 903.5. Control of quality of materials and works shall be exercised
by the Engineer in accordance with Section 900.
601.9. Traffic
No heavy commercial vehicles like trucks and buses shall be permitted on the lean concrete subbase
after its construction. Light vehicles if unavoidable may, however, be allowed af ter 7 days of
its construction with prior approval of the Engineer.
601.10. Measurements for Payment
The unit of measurement for dry lean concrete pavement shall be the cubic meter of concrete
placed, based on the net plan areas for the specified thickness shown on the drawings or as
directed by the Engineer.
601.11. Rate
The Contract unit rate payable for dry lean concrete sub-base shall be payment in full for carrying
out the required operations including full compensation for all labour, materials and equipment,
mixing, transport, placing, compacting, finishing, curing, testing and incidentals to complete the
work as per Specifications, all royalties, fees, storage and rents where necessary and all leads
and lifts.
602. CEMENT CONCRETE PAVEMENT
602.1. Scope
602.1.1. The work shall consist of construction of unreinforced, dowel jointed, plain cement
oncrete pavement in accordance with the requirements of these Specifications and in conformity
with the lines, grades and cross sections shown on the drawings. The work shall include
furnishing of all plant and equipment, materials and labour and performing all operations in
connection with the work, as approved by trie Engineer.
602.1.2. The design parameters, viz,, thickness of pavement slab, grade of concrete, joint details
etc. shall be as stipulated in the drawings.