Repairing of joints with sealing compound for Apron and Runway pavement area at S.V. Airport, Raipur.

Amount

Carriage of materials by Mechanical Transport including loading, unloading and stacking for a lead of 1 Km. a) Lime, moorum, building rubbish

Providing and laying in position cement concrete of specified grade excluding the cost of centering and shuttering - All work up to plinth level : a) 1:2:4 (1 cement : 2 coarse sand (zone-III) derived from natural sources : 4 graded stone aggregate 20 mm nominal size derived from natural sources)

Demolishing cement concrete pavement manually/ by mechanical means including disposal of material within 50 metres lead as per direction of Engineer - in - charge. a) Nominal concrete 1:3:6 or richer mix (i/c equivalent design mix)

Painting runway/taxi track/apron marking with water based road marking paint (IS-164) of 35 micron thick strip of specified colour by using fully/semi automatic paint applicator machine (using cold airless spray machine with minimum two spray gun) to give uniform finish including the cost of T&P and cleaning the surface of runway, taxiway, apron etc. from all dirt, seals, oil, grease and foreign material etc. complete as per the direction of Engg.-In-charge. a) White/Yellow/Red/Black

Providing and laying in position Polysulphide sealant of approved make conforming to BS-5212-1990 or IS: 11433 1995 in expansion/ construction/dummy joints including raking out joints and preparing the surface, rounding off edges, applying 2 coats of approved primer compatible with the brand of Polysulphide and preparing the surface and applying masking tape along the edge of joint to prevent accidental spillage of sealant on top surface and to give neat finish to the sealant and removing the masking tape after application of sealant etc. complete as per direction of Engineer in- Charge & particular specifications. [Note: For purpose of payment, quantity (Length x Width x Depth) of Polysulphide sealant only will be measured.] i) Expansion Joints of size 25 mm wide and 10 mm deep over 30 mm dia closed-cell Polyethylene foam back-up rod (manufacturers specifications) and as per sketch. ii) Construction Joints of size 10 mm wide and 10 mm deep over 12 dia closed-cell Polyethylene foam back-up rod(manufacturers specifications) and as per sketch. iii) Dummy Joints of size 10 mm wide and 10 mm deep over 12 mm dia closed-cell Polyethylene foam back-up rod (manufacturers specifications) and as per sketch.

Providing and laying Pavement Quality Concrete (PQC) produced in a Mobile Concrete mixer or batching and mixing plant having a Characteristic flexural strength i.e. flexural strength of 4.1 MPa at 28 days using Ordinary Portland cement of 43/53 grade or Portland Pozzolana Cement or Portland Slag cement conforming as per relevant IS codes, to be mixed at site, with 0.5% Super plasticizer by mass of cementitious material, fine aggregate, graded stone aggregates of 40 mm nominal size in appropriate proportion as per specification and job mix formula, laid in panels as per drawings/design as approved by the Engineer-In-Charge using Slip Form Paver or Fixed form paver including anti friction layer, joint filler board, making necessary provision for expansion, dummy and construction joint including filling with Polysulphide sealant of approved make, curing and making profile, complete as per direction of Engineer-in-Charge and specifications. The item for Execution shall include all operations making pavement for intended use but not limited to following: (i) Polyethylene sheet (White in color) of thickness 400 micron conforming to IS: 2508 with 6mm thick fine sand layer. (ii) Providing and laying in position for expansion joint, 25mm thick pre-cut Synthetic joint filler board of approved make conforming to IS:1838(part 3)-2011, 45 mm from top (to be removed at the time of filling of Polysulphide sealant). (iii) Mechanically cutting dummy joints 3mm wide x 1/3rd thickness of slab which is subsequently widened to 10mm for the top 25mm depth and construction joints 10mm wide x 25mm deep as per specification. (iv) Providing and laying in position Polysulphide sealant of approved make conforming to BS-5212-1990 or IS: 11433-1995 in expansion/ construction / dummy joints including rounding off edges, applying 2 coats of approved primer compatible with the brand of Polysulphide and preparing the surface and applying masking tape along the edge of joint to prevent accidental spillage of sealant on top surface and to give neat finish to the sealant and removing the masking tape after application of sealant etc. as per the details below:

(a) Expansion Joints of size 25 mm wide and 10 mm deep over 30mm dia expanded closed-cell Polyethylene foam back-up/backer rod of minimum density 22 Kg/Cum, as per manufacturer’s specifications and sketch at Appendix-‘A’. (b) Construction Joints of size 10 mm wide and 10 mm deep over 12mm dia expanded closed-cell Polyethylene foam back-up/backer rod of minimum density 22 Kg/Cum, as per manufacturer’s specifications and sketch at Appendix-‘A’. (c) Dummy Joints of size 10 mm wide and 10 mm deep over 12 mm dia expanded closed-cell Polyethylene foam back-up/backer rod of minimum density 22 Kg/Cum, as per manufacturer’s specifications and sketch at Appendix-‘A’. (v) Making profile as per DGCA CAR, panel drawing showing dummy, construction, expansion joints location. Note: (i) Areas inaccessible to paving equipment shall be constructed by manual/hand guided method. Areas in which manual/hand guided methods of construction become indispensable shall be got approved by the Engineer-in-Charge in writing in advance. (ii) The quantity of cement, type of cement and super plasticizer for one Cum. of finished concrete specified are for tendering purpose only. The contractor shall quote his rates assuming quantity of OPC cement as 360 Kg/Cum or 400 Kg of Portland Pozzolana Cement/ Portland Slag cement. In addition, if the actual quantity of cement & super plasticizer required as per laboratory mix design varies from the quantity assumed above, necessary cost adjustment for deviation in the quantity of cement and super plasticizer as per mix design, if any, shall be done as per the rate of cement and super plasticizer in actual supply voucher from manufacturer/authorized dealer at the time of execution. In the case of authorized distributor, the rate may be authenticated by the manufacturer. The rate of cement and super plasticizer exclusive of GST shall only be considered for payment.

Providing and laying polymerized elstomaric concrete (ShaliPatch EC or equivalent) with excellent adhesion to substrate for repair of concrete pavement like filling of potholes and cracks repairing including cutting of the existing loose ,damaged and worn out concrete pavement in a geometrical shape, the edge of the chipped out portion to be given a vertical / acute angled cut of at least 50mm depth, removal of debris, cleaning the surface thoroughly with air jet to make it free from loose and dust particles, priming the cleaned surface with a polyurethane primer (like ShaliPrime PUM or equivalent) to act as a bond coat for further rendering and laying the material in position etc complete as per the direction and satisfaction of the Engineer-in-charge.

M/s Awadhesh Construction

RAKESH KUMAR SINGH