PROVN OF PQC PAVEMENT FOR ONE DE AND FOUR DE TECHNICAL STRUCTURES AND CERTAIN IMPROVEMENTS TO OTHER STRUCTURE AT AF STN JAISALMER

Demolition of plain cement concrete (unreinforced) of any description as in PQC floors and taxi link and removing the rubbish outside MD land etc complete as specified and directed.

Earth work in excavation in all kind of soils by mechanical means (Hydraulic excavator) in over areas (exc. 30 cm, 1.5 m in width as well as 10 sqm on plan and n.exc. 1.5m in depth) including getting out and disposal of excavated earth lead upto 50 m and lift upto 1.5m, complete all as specified and directed.

Earth work in excavation in soft integrated rock by mechanical means (Hydraulic excavator) in over areas (exc. 30 cm, 1.5 m in width as well as 10 sqm on plan and n.exc. 1.5m in depth) including getting out and disposal of excavated earth lead upto 50 m and lift upto 1.5m, complete all as specified and directed.

Rolling and consolidating formation surface in cutting with power roller exc 8 tonne and not exc 15 tonne to achive 98% (density at OMC / modified proctor density) complete all as specified and directed.

M & L for laying and compacting 200 mm thick (compacted thickness) Granular Sub Base Course (GSB) grading as per Grade II as per Table 400-1 of MoRTH specifications for Road and Bridge works, 2013, in two layer of 100mm thick over compacted subgrade with natural sand, crushed gravel, crushed stone, crushed slag, or combination thereof as per the grading required. The materials are mechanically mixed, spread and levelling on the subgrade by using motor grader of adequate capacity, and rolling with vibratory roller of capacity 80-100 KN static weight for achieving required compaction density of atleast 98% of the Maximum Dry Density. Consolidating to required gradient and camber with finished surface tolerances as per Table 900-1 of MoRTH specifications for Road and Bridge works, 2013 complete all as specified and directed.

M & L for laying and compacting 150mm thick (compacted thickness) Wet Mix Macadam (WMM) laid in two layers of 75 mm each, WMM grading as per table 400-13 of MoRTH specifications 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 consolidating to required gradient and camber complete all as specified and directed. The finished surface tolerance to be as per Table 900-1 of MoRTH specifications for Road and Bridge works 2013 complete all as specified and directed.

M & L for providing and laying Dry Lean Concrete (DLC) 125 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 tolerance to be as per Table 900-1 of MoRTH specifications for Road and Bridge work 2013 complete all as specified and directed.

M&L for 10-20mm thick sand cushion with clean river sand duly clear of residual, organic an deleterious materials spread evenly to uniform thickness laid over DLC layer complete all as specified and directed.

Supplying and laying 400 micron thick HDPE sheet (Virgin Quality) water proof, wrinkle free without puncture having minimum weight 390 gm/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 directed. (Note: The area shall be measured net and No additional allowances/amount shall be paid for overlaps)

M & L pavement quality concrete (PQC) of 325 mm and certain portion in variable thickness of minimum 28 days field flexural strength of 45Kg/Sqcm or 4.5Mpa, 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 as specified by the manufacturer. PQC laid, spread and compacted with slip-form paver of minimum 7.50 m width, including curing and tining by Texturing cum Curing machine complete all as specified and directed.

Supply only polyster triangular fibres/non circular fibres (Recron 3S triangular fibre type CT-2012 12mm) having tensile strength 4000-6000 Kg/cm2, designed for melting point more than 250 degree celsius @ 0.25% by weight of cement in controlled pavement quality cement concrete and having specific gravity of 1.34 to 1.40 complete all as specified and directed.

M & L for 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 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 manufacturer complete all as specified and directed. Notes:- (i) Rounding of edge shall be done with hand grinder upto 5-6 mm dia. (ii) While cutting expansion joint, cutting machine should have facilities of arrangement of dual blade spaced at expansion joint width such that joint can be formed at a time.

M & L for forming of 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 6mm and 24mm 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 backup 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 all as specified and directed. Notes:- (i) Primer to be used before filling sealant. (ii) Edges shall be levelled and joints cut within 24 hours using diamond bit cutters of Bosch or equivalent used for cutting green concrete.

M & L for cutting of Construction joint 25 mm deep and 10 mm wide by 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. 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 breaker tape on top of backup 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 all as specified and directed. Notes:- (i) Primer to be used before filling sealant (ii) Edges shall be levelled and joints cut within 24 hours using diamond bit cutters of Bosch or equivalent used for cutting green concrete. (iii) The vertical edges or sides of concrete of construction joint shall be treated with a coat of lime wash or bituminous paint before concreting the adjacent bay.

M&L for finishing concrete pavement by brooming when concrete is green complete all as specified and directed.

M&L for adequate nos. of coat of paint, Painting lines, dashes, arrow, letters etc on roads, pavement and the like exc 10cm wide with road marking paint, white or golden yellow complete all as specified and directed.

M&L for Formwork to faces of walls, retaining walls, abutments, parapets and staircase railing and similar work including attached pillasters, buttresses, etc.; vertical or to batter for fair finished flat surfaces of concrete complete all as specified and as directed.

Material and labour for preperation of new plastered or unplastered surfaces of wall and applying two coats of cement base paint over one coat of primer complete all as specified and as directed.

Material and labour for preparing new or previously untreated steel surfaces of any description over 10 cm width or girth not otherwise described and applying two coats of synthetic enamel paint and over one coat of red oxide primer complete all as specified and directed.

Material and labour for cement concrete 1:2:4, type B2, using 40mm graded stone aggregate in foundations, filling and mass concrete etc. complete all as specified and as directed.

S & F rolled sections as in framing for CCD measures/ SWT tank and the like fixed with angle cleats and connecting plates, etc. of grade Fe 410-W (Gde-E-250) complete all as specified and directed.

M & L for high tension screw bolts/anchor bolts 16 to 20 mm dia (machine made) with hexagonal or square heads at one end and screwed the other or screwed both end and to be fitted with washers and one hexagonal or square nut, not exceeding 30 cm long fixed as line wire completed all as specified and directed.

M & L for Plates (plain or chequered) channels, square cut or notched (ordinary and counter sunk) forming holes, with riveted, bolted or welded attachment confirming to Fe 410-W (Gde-E-250) Quality B complete all as specified and directed.

Supply and fixing of Chain link MS galvanised fencing, any size or type complete all as specified and directed. Note : (i) Chain link of mesh size preferably 50mm X 50mm mesh 10 gauge thickness will be provided, however the size may be changed after written approval of GE. (ii) The weight of chain link fencing shall be ascertained by BOO ordered by CWE

Supply and fix 8mm dia high tension steel wire rope (SWR) lockable made ends of following sizes complete all as specified and directed.

M & L for U-Clamp of (EN-9 Grade) for 8mm dia steel wire rope (SWR) cmlete all as specified and directed.

S & F joist, channel, angle or Tee sections, fixed independently, without connecting plate etc of grade Fe 410-W (Gde-E-250) welded and erected etc complete all as specified and directed.

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