REPAIR/ REPLACEMENT OF BROKEN SLABS, ELASTOMERIC JOINT FILLING AT SOUTH PTT AND DISPERSAL AREA OF AIRFIELD AREA AT INS HANSA UNDER GE(NW) VASCO.

Material and labour for demolition of cement concrete of any description and in any position not otherwise specially provided for and demolition procedure like cutting out of full depth of (100 to 450mm) existing damaged/shattered concrete slab with diamond wheel cutter or carbide tipped wheel saw to provide a pressure relief cut within the patch area prior to boundary sawing, in proper rectangular, square or triangular shape perimeter without disturbing adjacent slab, after the repair area is isolated by full - depth saw cuts, making small pieces, lift and removing the deteriorated concrete slab pieces from its position and removing to a distance exc 1.5 Km and not exceeding 5 Km complete all as specified.

Material and labour for laying Dry lean Concrete (DLC) 100 mm thick of aggregate gradation as per Table 1 of SP 49:2014 having 7 day average compressive strength not less than 7 MPa Minimum cement content not less than 140 Kg/Cum DLC mixed in Batching Plant, transported to site and laid by electronic sensor paver including spreading and compacting using high amplitude tamping bars of paver (initial compaction) further by double drum smooth wheeled vibratory rollers with 80-100 KN static weight to achieve minimum dry density not less than 98% of maximum Dry Density, necessary finishing etc complete all as specified and tolerances to be as per Table 900-1 of MoRTH specifications for Road and Bridge work 2013

Sand filling under floors or in any position including watering and consolidation for laying interlocking paver block all as specified.

Supplying and laying 400 micron thick HDPE Sheet (Virgin quality|) water proof, wrinkle free without puncture having minimum weight 390gm/Sqm over tack coat/Sand cushion as specified in the design with overlap between adjacent strips and at transverse joints as minimum 300mm complete all as specified and as directed by Engr-in-Charge. Note: Sand layer shall be measured and paid separately and overlapping of HDPE sheet shall be included in this unit rate.

Pavement quality concrete (PQC) of minimum 28 days field Flexural strength of 45Kg/ Sqcm or 4.5 Mpa, aggregate gradation as per Table 3 of IRC 15-2017, coarse aggregate of clean, hard strong, dense, non-porous and durable pieces of crushed stone or gravel, fine aggregates of clean natural sand or crushed stone sand or combination of both using minimum 360 Kg/Cum of cement with non-circular, virgin synthetic fibre of 12-18 mm length, specific gravity 1.34 to 1.39. UV stable, alkali resistant, with equivalent dia 15-40 micron, minimum melting temperature as 240 C and minimum tensile strength of 300 Mpa and at the rate specified by the manufacturer. PQC laid, spread and compacted with slip-form paver of minimum 7.50 m width, including curing and timing by texturing cum curing machine including necessary formwork complete all as per specified and directed. Required surface texturing to be done as specified in clause 10.1, 14 and Table 9 of IRC 15-2017.

Supply only non circular synthetic fiber reinforcement all as manufacturer instructions complete all as specified and directed.

Finishing surface of concrete roads, pavements, by brooming complete all as specified

Forming 25 mm width expansion joint in concrete slab for full depth of PQC. Early entry saw and subsequent cutting by using diamond bit cutter of appropriate size, straight and smooth edges. Joint cleaned thoroughly with application of compressed air. Joint shall be made dry, vacuum cleaned and free of dirt, oil, vegetation and other debris. The joint then filled with the premoulded 25mm thick compressible polyethylene closed cell type filler board as specified, thereafter application of two coats of primer with thin brush by forward and backward movement at an interval of 30 mins before placing the backup rod and pouring the sealent. Placing of closed cell, medium density, crossed link polyethylene foam packup rod of 30mm dia, over filler board and filled with polyurethane based sealent complying with BS- 5212, BS-4254 & EN-141875-2003 with minimum movement accommodation factor (MAF) of +/- 30% having minimum 10 year performance guarantee, applying masked tape after filling of sealent as per the method specified by the manufacturer complete as specified and as directed. Note : (i) Initial cutting shall be carried out within 24-36 hours of casting. (ii) Final cutting, rounding of edges, use and waste of back up rod to avoid deposition of foreign materials in the joint up to final filling of joints shall be carried out after 28 days

Cutting of construct joints 25 mm deep and 10mm wide by early entry saw cut using diamond bit cutter of appropriate size, straight and smooth edges. Joint cleaned thoroughly with application of compressed air. Joint shall be made dry, vacuum cleaned and free of dirt, oil, vegetation and other debris. Application of two coats of primer with thin brush by forward and backward movement at an interval of 30 mins before placing the backup rod and pouring the sealent. Placing of closed cell, medium density, crossed link polyethylene foam packup rod of 12mm dia, application of bond breaker tape on top of backup rod for complete width of the joint and filled with polyurethane based sealent complying with BS- 5212, BS-4254 & EN-141875-2003 with minimum movement accommodation factor (MAF) of +/- 30% having minimum 10 year performance guarantee, applying masked tape on the edges of joint and removing the masking tape after filling of sealent as per the method specified by the manufacturer complete as specified and as directed. Note : (i) Initial cutting shall be carried out within 24-36 hours of casting. (ii) Final cutting, rounding of edges, use and waste of back up rod to avoid deposition of foreign materials in the joint up to final filling of joints shall be carried out after 28 days

Material and labour cutting out existing damaged concrete slab with cutter in proper rectangular, square or triangular shape correction of cracks, Edges, Repair of potholes and undulations Providing and laying of single component self-leveling PU based fast setting elastomeric concrete as approved by GE, after thorough mixing with and electrically operated paddle stirrer having setting time of 1 to 1 1/2 hour and yield of 1800 kg/cum with a prior coat polyethylene based single component fast drying primer applying @ 100ml/Sqm after cutting the damaged area to proper geometrical shape with min depth of 25mm and cleaning the surface thoroughly with air jet.