Tender For Permanent Restoration Work From Bhakhra Bridge Km 2/00 - Providing concrete for plain/reinforced concrete in open foundations complete as per drawings and MoRTH specifications Clause 1702, 1703, 2102 & 2104 P.C.C grade M 10 Nominal mix 1:3:6 2 Stone masonry work in cement mortar in foundation complete as per drawing and MoRTH specifications Clauses 1402, 1405, 2102 & 2104. Random Rubble Masonry In 1:6 cement mortar 3 Providing laying spreading and compacting specified graded sand, gravel (crushed stone) as per Table 400-1,400-2 or any other course material as per design mix, as per CBR in sub base course including premixing the material at OMC in wet mix plant, carriage of mixed material spreading in uniform layers with motor grader F.E loader on a prepared base and compacting with vibratory roller to achieve desired density (as per I.S.2720) including all material, labor, machinery, lighting guarding, barricading and maintenance of diversion complete.[MoRTH specification : Clause 401]. By mechanical means For Grading-I Material 4 Construction of dry lean cement concrete Sub- base over a prepared sub-grade with coarse and fine aggregate conforming to IS: 383, the size of coarse aggregate not exceeding 25 mm, aggregate cement ratio not to exceed 15:1, aggregate gradation after blending to be as per table 600-1, cement content not to be less than 150 kg/ cum, optimum moisture content to be determined during trial length construction, concrete strength not to be less than 10 Mpa at 7 days, mixed in a batching plant, transported to site, laid with a paver with electronic sensor, compacting with 8-10 tonnes vibratory roller, finishing and curing. 5 Construction ofun-reinforced , plain cement concrete pavement M-40 (Grade), thickness as per design, over a prepared sub base, with 43/53 grade cementas per Clause 602, coarse and fine aggregates conforming to IS:383, maximum size of coarse aggregate not exceeding 31.5 mm, mixed in a in fullyautomatic Batching Plant andtransported to site intransit mixer for having continuous agitated mixer, manufactured as per approved mix designincluding pumping of R.M.C. from transit mixer to site of laying , with all lead and lift including cost of admixtures in recommended portion as per IS 9103 to accelerate/ retard setting of concrete, improve workability without impairing strength and durability as per direction of Engineer in charge laid with a Fixed Form Paver (laying and fixing of 150 micron thick polythene Film and finished in continuous operation including provision of contraction and expansion, construction joints, applying debonding strips, primer, sealant near approaches to bridge/culvert and construction joints, admixtures as approved, curing of concrete slabs for 14-days using water finishing to lines and grade as per drawingand MoRTH Specification Clause 602 including vaccum dewatering process with all required equipments (Dowel Bars will be paid seprately). 6 Plastering with cement mortar (1:4), 20 mm thick on Stone work. 7 Providing and laying boulder apron for bed protection with stone boulders of minimum size and weight as per Clause 5.3.7.2 of IRC:89, no fragmentweighing less than 25 kg laid dry complete as per drawing and MoRTH specifications Clause 2503.2 8 Construction of RCC guide posts of 250 mm dia M25 grade cast-in-situ with 20 mm nominal size aggregate, true to line and grade, tolerance of vertical RCC posts not to exceed 1 in 500 as per drawing and MoRTH Specification Clause 1700 & 1600
