Name of Work Na - e-Tendering

94 Dy. E. E.
Appendix- A
SPECIFICATION FOR PAVING BLOCKS WORK:
Item of Work: Providing and fixing 60mm thick factory made Hydraulically pressed Mechanically vibrated and compacted precast inter locking cement
concrete paving blocks in M-40 grade of approved size and shape as specified 50 mm in gray cement and top surface 10 mm in white cement with
coloured pigment including cost of all materials, manufacturing, curing, transportation of blocks to work site including loading, unloading and stacking as
directed, laying paving blocks in position over prepared bed of sand of 50 mm thickness including necessary excavation in all stratas, spreading blindge of
fine sand over the prepared bed, compacting blocks by plate vibrator etc. complete.
1.General: The item pertains to the provision and fixing 60mm thick factory made Hydraulically pressed Mechanically vibrated and compacted precast
inter locking cement concrete paving blocks in M-40 grade of approved size and shape as with 50 mm thickness in gray cement and top surface 10 mm
thickness in white cement with coloured pigment including cost of all materials, manufacturing, curing, transportation of blocks to work site including
loading, unloading and stacking as directed, laying paving blocks in position over prepared bed of sand of 50 mm thickness including necessary
excavation in all stratas, spreading blindge of fine sand over the prepared bed, compacting blocks by plate vibrator etc. complete.
2.Materials:
( i) Paving Blocks: Material for paving block viz. Aggregate, sand and cement shall be conforming to relevant Indian Standard Specification. The
Paving blocks shall be of Hydraulically pressed and Mechanically vibrated having 60 mm thickness. The blocks shall consists of 50mm
thickness concrete layer with grey cement and top 10mm layer from approved color pigment. Compressive strength of Paving locks after 28 days
of curing shall be 40 N /mm2 when tested at laboratory.
(ii)Sand for bedding: Bedding material shall be sand which shall be as per standard specification
confirming to I.S. 383 from approved from approved quarry.
(iii)1:2:4 cement concreting for supporting and filing gaps shall be done as required and
as directed by the Engineer In Charge.
3. Execution: The bedding shall be done as directed by the Engineer in Charge for required depth with proper slope and levels. The bedding of sand shall be
spread. The average thickness of the sand bedding shall be 50 mm. Sand bedding shall be considering slope required. The 60mm thick paving block should
be laid above sand bedding so that it shall be interlocked properly giving pleasant appearance. The properly laid Paving Blocks shall be compacted by plate.
The Paving Blocks shall be properly supported by cement concrete 1:2:4 at corners & ends and gaps between walls & paving blocks shall be filled with
cement concrete.1;2;4 for 100 mm width and 110 mm depth on unsupported side.
4. Item to include:
(i) Cost of all materials i.e. ready made paving blocks including aggregate, metal, sand, cement, colour pigment complete.
(ii) Excavating laying sand bedding, laying paving blocks and vibrating and compaction.
Contractor No. of correction Executive Engineer