tender for general-maintenance of various roads-thrissur corporation ollur zonal-general civil work - maintenance work 2 od199637/2025-2026:providing and laying seal coatsealing the voids over modified penetration macadamlaid to the specified levels, grade and cross fall using type a, type b and type c as per technical specification clause 510a. by manual meanscase iii : type c(ii) bitumen (s-65) (modified from 75.5.12.a.3.2 pb) 3 75.5.5.b.2pb:modified penetration macadam 75 mm thick using bitumen s-65 - packed bitumen rates
construction of penetration macadam over prepared base by providing a layer of compacted crushed coarse aggregate using chips spreader with alternate applications of bituminous binder and key aggregates and rolling with a three wheel 80-100 kn static roller to achieve the desired degree of compaction as per technical specification clause 506. 4 75.5.2.1pb:tack coat - with packed bitumen rates
providing and applying tack coat with bitumen emulsion (rs-1) using emulsion distributor at the rate of 0.20 to 0.25 kg per sqm on the prepared bituminous surface cleaned with hydraulic broom as per technical specification clause 503. 5 75.5.11.1.a.2pb:mix seal surfacing - manual means - type a - bitumen s-65 - packed bitumen rates
providing, laying and rolling of close-graded premix surfacing material of 20 mm thickness composed of 11.2 mm to 0.9 mm (type-a) or 13.2 mm to 0.9 mm (type-b) aggregates using penetration grade bitumen to required line, grade and level to serve as wearing course on a previously prepared base, including mixing in a suitable plant, laying and rolling with a three wheel 8-10 kn static roller and finishing to required level and grades as per technical specification clause 509
by manual means
type a
(ii) bitumen (s-65) 6 4.1.a.1:granular sub-base with well graded material (table 400.1)
(a) by mix in place method
construction of granular sub-base by providing well graded material, spreading in uniform layers with motor grader on prepared surface, mixing by mix in place method with rotavator at omc, and compacting with smooth wheel roller to achieve the desired density, complete as per technical specification clause 401.
(i) for grading i material 7 od200081/2025-2026:filling up of potholes with bituminous ready mix compound (25kg bag) and compacting by ramming to get a compact surface including cost of material and laying charges assuming an average of 30 bags of 25 kg ready mix compound will be laid in potholes in a day.