Special Repairs to Udumalpet Canal from LS. 21.500 Km to 21.750 Km in Udumalpet Taluk of Tiruppur District.

Dismantling the existing dilapilated plain cement concrete under 3 metre height inside the canal and clearing away carefully stacking of materials useful for reuse for any thickness of walls within initial lead of 10m and initial lift of 2m etc., complete complying with standard specifications and as directed by the departmental officers.

Preparation of sub grade duly moistered and duly removing the surface irregularities and laying plain cement concrete lining 75mm thick of M15 grade mix concrete on canal bed/haunches/berms using hard coarse aggregate with nominal maximum size of 20mm and down graded to IS specified grading to have well graded aggregate and mixing these in mixer machine (concrete mix to yield 28days characteristic compressive strength of 15N/mm2) placement of concrete over the subgrade and canal bed/hauches/berms manually including consolidation of concrete, smooth finishing of concrete surface, providing transverse contraction joint grooves as per technical specification and curing of the lining. the subgrade shall be well prepared, dressed and rolled to true level and specified section to for a firm compacted base for the lining etc., complete complying with standard specification and as directed by the departmental officers.

Removing and refixing the disturbed PCC slabs of size 60cmx45cmx5cm and making the surface suitable to receive the cement mortar bedding of 15mm thick in cement mortar 1:5 (One Cement and Five M-Sand) directly on the sub grade duly dressed and compacted allowing 24 hours for water curing of this bed layer and then laying PCC slabs with 6mm thick cement mortar 1:3 (One Cement and Three P-Sand) with backing, brushing, wetting and fixing the precast C.C slab in position inside of the canal with templates by laying the slabs in position with cement mortar 1:2 (One Cement and Two M-Sand) with water proofing compound by 2% weight of cement used to full thickness of slab with same mortar curing etc., complete complying with standard specification and as directed by the departmental officers.