REPAIR TO PQC OF ORA PTT DISPERSAL NORTH AND SOUTH LOOP TAXI LINKS ETC RENEWAL OF BLACK TOP SURFACE WITH COLD EMULSIONS PME AND CONNECTED ANCILLARY WORK IN TECHNICAL AREA AT AF STN JAISALMER

Demolition of cement concrete (Unreinforced) in ground floors/taxiway and pavings etc andmake the surface clean and ready to receive newsurface.Including removal of the same outsides MOD Land etc complete all as specified and directed.

Earth work in excavation over area not exceeding 1.50m deep by mechanical means(hydraulic excavator) means over areas(exceeding 30 cm in depth,1.50m in width as well as 10 Sqm on plan) including getting out and disposal of excavated earth lead upto 50 m and lift upto 1.5m,in any type of soil complete as specified and directed by Engineer-in-Charge.

Rolling and consolidating formation surface in cutting/filling to required camber using 8 to 15 tonne earth compactor (power roller) to 98% of modified proctor density at optimum moisture content (OMC) complete all as specified and directed.

Material and labour for laying 100mm thick (compacted thickness)grading as per table 400-13 MoRTH spcification for road and bridge works 2013 manufactured in WMM plant,material comprising of clean,crushed,graded aggregate and granular material premixed with water to a dense mass,spreading with sensor paver and rolling with vibratory roller of capacity 80-100KN static weight and consolidation to required gradient and camber complete all as specified and directed.The finished surface tolerance to be as per Table 900-1 MoRTH specifications for Road and bridge works 2013.

Material and labour for Laying and compacting 100mm thick (compacted thickness) granular sub base course(GSB) grading as per grade-V as specified table 400-1 of MoRTH specifications of road and bridge works 2013 in a single layer over compacted subgrade with natural sand,crushed gravel,crushed stone,crushed slag or combination thereof as per the grading requirement .The material are mechanically mixed spread and levling on the subgrade by using motor grader of adequate capacity and rolling with vibratory roller of capacity 80-100 KN static weight for achieveing required compaction density of atleast 98% of the maximum dry density .Consolidating to required gradient and camber complete all as specified and directed with finished surface tolerance as per Table 900-1 of MoRTH specifications of road and bridge works 2013

Providing and laying for 125 mm thick dry lean concrete (DLC) 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 roller with 80-100 KN static weight to achieved minimum dry density not less than 98% of maximum dry density,necessary finishing etc complete all as specified and tolerance to be Table 900-1 of MoRTH specifications for road and bridge work 2013.

Material and labour for pavement quality concrete (PQC) of any thickness , of flexural strength 45 Kg/ sqcm (lower control limit) in field as per design mix , using minimum 400 Kg/cum and not exceeding 450 Kg/cum of cement including triangular/non circular synthetic fibre reinforcement @ 0.25% by weight of cement including steel form work for butt nosing, rounding off edges , curing , spread and compacted by using needle, plate and screed vibrators etc complete all as specified and directed. Note:- (i) The cost of admixture required as per design mix shall deemed to be included in the rate (the constant shall be applied based on design mix). (ii) Polyster triangular/non circular synthetic fibres as secondary reinforcement mixed in concrete shall be measured and paid for separtely under resp-ective item of this schedule. However, mixing shall be deemed to be included in the rate (the constant shall be applied based on design mix). (iii) Construction joints, dummy (contraction joints) and expansion joints shall be measured and paid separately under respective items. (iv) Deduction shall be made in PQC for quantity for expansion joints.

Cutting of construction joints 25 mm deep and 10 mm wide by early entry saw cut using diamond bi 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 minutes before placing the backup rod and pouring the sealant. Placing of closed cell medium density, crossed linked polyethylene foam backup rod of 12 mm dia, application of bond breake tape on top of back up rod for complete width of the joint and filled with polyurethane based sealant complying with BS-5212, BS 4254 and EN- 141875-2003 with minimum movement accommodation factor (MAF) of +I- 30% having minimum 10 year performance guarantee, applying masked tape on the edges of joints and removing the masking tape after filling of sealant as per the method specified by the manufacturer complete as specified and directed

Forming dummy/contraction joint with an initial saw cut of 3 mm soon after the concrete has set, upto a depth of 1/3rd to 1 /4th the thickness of the slab widening the first saw cut to 6 mm and 24 mm deep 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. Application of two coats of primer with thin brush by forward and backward movement at an interval of 30 minutes before placing the backup rod and pouring the sealant. Placing of closed cell, medium density, crossed linked polyethylene foam backup rod of 8 mm dia application of bond breaker tape on top of back up rod for complete width of the joint and filled with polyurethane based sealant complying with BS-5212 , BS 4254 and EN-141875-2003 with minimum movement accommodation factor (MAF) OF +/- 30% having minimum 10 year performance guarantee applying masked tape on the edges of joints and removing the masking tape after filling of sealant as per the method specified by the manufacturer complete as specified and directed

Forming 25 mm width expansion joint in concrete slab for full depth of POC. Early entry saw and subsequent cutting by using diamond bit cutter of appropriate size. straight and smooth edges. Join cleaned thoroughly with application of compressed air. Joint shall be made dry, vacuum cleaned and free of dirt, oil, vegetation and other debris. The join then filled with pre-molded 25 mm 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 minutes before placing the backup rod and pouring the sealant Placing of closed cell medium density, crossed linked polyethylene foam backup rod of 30 mm dia, over filler board and filled with polyurethane based sealant complying with BS- 5212, BS 4254 and EN-141875-2003 with minimum movement accommodation factor (MAF) of+/- 30% having minimum 10 year performance guarantee applying masked tape on the edges of joints and removing the masking tape after filling of sealant as per the method specified by the manufacture complete as specified and directed.