REPAIR TO CERTAIN ROADS AT NMS UNDER AGE (I) NABAGRAM

Scarifying or picking gravelled macadam or bituminous macadam surfaces in area exc 400 sqm and depth exc 50 mm but not exceeding 100 mm deep by any means refer SSR Preambles of SSR IC-20043 (Scarifying include over and grading the broken up surface to the proper camber etc. as required) to required gradient and camber, complete all as specified and directed.

Repair to potholes any depth, not exc 1 sqm each including sweeping free from dust and mud, or water, scoring sunken surfaces in roads, paths, etc. cutting around edges to at least 25 mm in depth, making good by fillinf in screened & graded road metal, watering and well ramming and applying evenly priming tack coat with bituminous primer @ 5 kg per 10 sqm, putting in and including premixed bituminous macadam, well rammed and sealed with binder 9.8 kg per sqm, (blinder Viscocity grade paving bitumen of VG-30 grade) with 0.09 cum of stone chippings, 6.3 mm size and again well rammed, rolled and compacted to required camber and gradient to uniform smooth surfaces by mechanical paver and using with 8 to 12 tonne power roller (including supply of premixed macadam, binder and chippings), complete all as specified and directed. [Note : Pot holes register to be maintained by Engr-in-Charge and payment shall be made as per Pot holes register.]

M&L premixed bituminous macadam over primed surface of road using paving bitumen VG-30 & temperature as per table 500-1 & 500-2 of MoRTH & as per IS : 73, laid/rolled by 8 to 10 tonne capacity roller and compacted to required gradient and camber (consolidated thickness 75 mm or less) including preparation of area before laying of Macadam with mechanical paver, binder contents of premixed macadam shall be 4% by weight of total mix (Design Mix), complete all as specified and directed. [Note : (i) Work shall be executed after approval of design mix of bituminous macadam by GE/ AGE (I). (ii) Calibration of Hot Mix Plant shall be submitted to Engr-in-Charge for approval. (iii) Payment shall be made to Contractor after submission of approved design mix, bitumen extraction report, Road Roller register & calibration report. (iv) Exact qty of binder to be used shall be ascertained by Design Mix. (v) Minimum 4% binder shall be used. However, in case more than 4% of binder content is required as per design mix, the same shall be provided by the contractor at no extra cost to dept (vi) Course aggregate's physical property as per MoRTH table 500-6 & mixing of all aggregates as per table 500-7 of MoRTH. (vii) Unit rate quoted by bidder shall inclusive testing charges as above & as per MoRTH & no extra claim against testing charges shall be entertained later on.]

Preparation of black top surface by brushing with wire brushes for removing caked mud etc., sweeping with brooms and finally fanning the cleaned surface with gunny bags to remove all loose dirt etc. and M&L and applying evenly a tack coat of rapid setting cationic bitumen emulsion RS-1 conforming to IS : 8887 at a rate of application of 0.2-0.3 kg/sqm on bituminous surface as specified in Table 500-5 of MoRTH Specification for Road and Bridge Works 2013, using mechanical sprayer after cleaning of existing surface, complete with mechanical sprayer, complete all as specified and directed.

M&L Bituminous premix semi dense asphaltic concrete 30mm consolidated thickness with 5.5% binder with paving bitumen (VG-30) (Mix Design criteria as per SSR Part-I Clause 20.B.2.11), coarse aggregate, fine aggregate, filler cement (OPC - 43 Gde) as per recommendation of design by weight of total mix from hot mix plant, rolled by with 8 to 12 tonne vibrating (tandom) road roller to confirm uniform surface and compacted to required camber and gradient, complete all as specified and directed. [Note : (i) Work shall be executed after approval of design mix of semi dense asphaltic concrete by GE/ AGE(I). (ii) Calibration of Hot Mix Plant shall be submitted to Engr-in-Charge for approval. (iii) Payment shall be made to Contractor after submission of approved design mix, Bitumen Extraction Report, Road Roller Register & Calibration Report. (iv) Exact qty of binder to be used shall be ascertained by Design Mix. (v) Minimum 5.5% binder shall be used. However, in case more than 5.5% of binder content is required as per design mix, the same shall be provided by the contractor at no extra cost to dept.]

M&L preparing bituminous surfaces of road by cleaning and preparing the road surface and making good the road marking location and marking / applying 2.5 mm thick white or golden yellow reflective hot thermoplastic road marking paint (Hot application) for centre lines, stop lines, dashes, arrows etc. and the like n. exc 10cm wide on roads pavements confirming to BS 3262-1989 laid down through modern propelled road marking machine in a layer of crystalline glass bead (Type II)(Soda lime glass) with special applicator machine through modern propelled road marking machine in a layer all as per manufacturers instruction and use of all ingredients such as binder, glass beads, titanium dioxide, calcium carbonate, interfiller thermoplastic required for glass beads per sqm by incorporating the white/ yellow beads for reflectivity in 100 mm width, complete all as specified and directed.