SPECIAL REPAIRS TO ROADS AND ALLIED WORKS AT SEVEN WELLS, NANDANAM AND CAMP NO 1 UNDER GE CHENNAI

Amount

BOQ UPLOADED ON 18 AUG 2023

SCHEDULE "A" PART-I (SPL REPAIRS ROADS)

Excavating over areas, not exc 1.5m deep & getting out in soft / loose soil

Removing excavated soils to a distance not exceeding 50m and depositing where directed at a level not exceeding 1.5m above the starting point complete all as specified and as directed.

Hard core of broken stones or boulder of gauge n.exc 63mm deposited spread and levelled in layers n.exc 15cm thick watered and rammed to a true surface

PCC 1:4:8 mix type D2 (using 40mm graded stone aggregate) as in sub base of flooring of 100mm thickness complete all as specified and directed.

Precast Kerbs or mud stops and the like including weathering slightly rounded or chamfered angles and throating on edges of PCC 1:2:4 type B1 using 12.50mm graded stone aggregate complete all as specified and as directed

Providing and laying 60mm thick factory made chamfered edge cement concrete paver block of M-35 grade with approved colour, design & pattern as in footpath or hardstanding etc., laid over 50mm thick compacted bed of fine sand, compacting and proper embedding/ laying of inter locking paver blocks into the sand bedding layer through vibratory compaction by using plate vibrator, filling the joints with sand and cutting of paver blocks all as directed by the Eng-in-Charge.

Preparing black top surfaces by brushing with wire brushes for removing caked mud, loose materials etc., sweeping with mechanical blower or brooms to remove all loose dirt, materials etc., complete all as specified and as directed.

Applying evenly using pressure sprayer a priming / tack coat with bituminous primer of paving bitumen of Grade VG-10 at 5 kg / 10 Sqm over bituminous surfaces complete all as specified and as directed.

Applying evenly using pressure sprayer a priming / tack coat with bituminous primer of paving bitumen of Grade VG-10 at 10 kg / 10 Sqm over unsurfaced water bound macadam surfaces including preparation by brushing with wire brushes for removing caked mud etc., sweeping with mechanical blower or brooms to remove all loose dirt, materials etc complete all as specified and as directed.

Bituminous premix semi-dense asphaltic concrete (SDAC), 40mm consolidated thickness with 5.5% minimum binder content by weight of total mix, (paving bitumen VG-30) and filler of 2% cement, rolled and compacted to required camber and gradient complete using mechanical paver and rolled to a uniform, smooth surface using Tandem vibratory roller complete all as specified and as directed.

(a) Contractor shall quote his rate by considering 5.5% bitumen content. If it is less than 5.5% by weight of total mix, the amount shall be recovered for the less weight of binder only at the rate of Rs 42/- per Kg if technically acceptable. No other claim whatsoever on account of this will be allowed.

(b) No price adjustment shall be applicable if excess quantity of binder content is used / approved in the execution of work under this item.

(c) Cement shall be used as filler at a minimum of 2% by weight of total mix. In the event of variation in the mix design in the percentage of filler content on plus side, nothing extra shall be paid.

Repairs to potholes any depth not exceeding 1 sqm each including sweeping free from dust and mud, or water, scoring sunken surfaces in roads, paths etc., cutting around edges to atleast 25mm in depth, making good by applying tack coat of paving bitumen of Grade VG-30 at 5 kg per 10 sq m, putting in premix as specified for SDAC well rammed (including supply of SDAC) depth of potholes not exceeding 30mm complete all as specified and as directed.

Premix Dense Bituminous Macadam (DBM), as in profile layer, with grading 2 of IRC laid in layers of 75mm or less (consolidated) thickness using 4.0% binder content by weight of total mix, with paving bitumen of grade VG-30 using hot mix plant spread, rolled and compacted to required camber and gradient complete using mechanical paver and rolled to a uniform, smooth surface using Tandem vibratory roller complete all as specified and as directed.

Notes:-

(a) Contractor shall quote his rate by considering 4.0% bitumen content. If it is less than 4.0% by weight of total mix, the amount shall be recovered for the less weight of binder only at the rate of Rs 42/- per Kg if technically acceptable. No other claim whatsoever on account of this will be allowed.

(b) No price adjustment shall be applicable if excess quantity of binder content is used / approved in the execution of work under this item.

(c) DBM shall be as per MORTH specifications including minimum binder content mention therein and as detailed in particular specifications.

(d) Supply and mixing of hydrated lime or cement or both in case TSR is less than 80% is deemed to be included in the rate quoted.

(e) The marshall stability shall be a minimum of 900 kg.

(f) The coarse aggregate for DBM shall be granite stone.

Removing Old Reflective Delineator and taken on Credit and provision of new MS Round pipe retro reflective Delineator with protectn cage fixed on padestal 300mm x 300mm x 450mm of PCC 1:2:4 type B1 using 20mm graded stone aggregates, finished with cement plaster 10mm thick in CM 1:6 with three coats of White wash duly anchored in ground on location as directed by the Eng-in-Charge and as per the manufacturers instructions complete all as specified and directed

Make shall of Cat No DA-952-GP of Dark Eye or equivalent of makes as listed here-in-after as approved by GE.

Removing old CAT eyes and taken on credit and provision of new Duo directional CAT eyes (Road studs) of size 100mmx110mmx20mm made up of weather resistant high impact polymer conforming to ASTM D4280 and having electronically welded micro prismatic lens with abrasion resistant coating and fixed with 2 Nos of polymer shanks and epoxy adhesive conforming to IS as per manufacturer’s instructions complete all as specified and directed.

Make shall of Cat No. DA-52 of Dark Eye or equivalent of makes as listed here-in-after as approved by GE.

Removing Old Solar studs and taking on Credit and provision of new Solar Studs made out of Aluminium composite body (load capacity 20 tonnes) fixed with bright LEDs 3 Nos (RED) on each side of size 125mm x 125mm x 25mm and shank 65mm Li / Cd battery, fixed with adhesive as per the manufacturers instructions complete all as specified and directed

Make shall of Cat No. DA-110 of Dark Eye or equivalent of makes as listed here-in-after as approved by GE.

Preparing road surface including cleaning the road surface of all dirt, seals, oil, grease and foreign material etc and applying 2.5mm thick road marking strips (Retro reflective) of specified shade/colour using hot thermoplastic material conforming to IS-164(1981) by fully automatic thermoplastic paint applicator machine fitted with profile shoe, glass beads dispenser including glass beads, propane tank heater and profile shoe heater, driven by experienced operator in accordance with manufacturer’s instructions all as per BS EN 1871, BS EN 1423 and BS EN 1424 complete as specified and directed.

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