REPAIRS/MAINT OF AIRFIELD/HANGAR ETC AT AVN BDE AND R AND O UNIT UNDER GE MISSAMARI

Amount

M&L Surface Preparation by removing existing flooring with mechanical means, prepare the concrete substrate with proper scarifying & diamond grinding, Shot blasting, with Vaccum cleaning to remove dirt, dust, laitance, other contaminants etc., and to form the required anchor profile on the floor substrate between the floor topping and the concrete floor complete all as directed.

Providing and applying 2 part water dispersed epoxy resin primer Sikafloor ®-80 Epocem Primer followed by applying temporary moisturer barrier technology based three part, self smoothing underlay screed Sikafloor 81 Epocem to a thickness of 2mm having carbon dioxide diffusion coefficient 1782 as per Klopfer Engel fried method, Water vapour diffusion co-efficient µH2O = 177 as per DIN 52615, Water absorption co-efficient W = 0.06 kg/m2as per SN EN 1062-3, Compressive strength 55 N/ Sqmm after 28days as per ASTM C 579, Flexural strength 10 N/ Sqmm after 28days as per EN 196, When applied at minimum 3 mm thickness it can be laid over high moisture content substrate when substrate moisture is more than 4% complete all as per manufacturers instruction and as directed.

Installation of Epoxy topping 2mm using notch trowels and Spike rollers. Providing and applying 2mm thick two part, solvent free, coloured,100% solids, self smoothing, smooth glossy, epoxy resin topping Sikafloor®-264 HC using notch trowels and spike rollers having compressive strength of 53 N/mm2 as per EN 196-1, Flexural strength of 20N/mm2 as per 196-1, Shore D Hardness 76 As per DIN 53 505, abrasion resistance 41mg ( CS10/ 1000/ 1000) as per DIN 53109 complete all as per manufacturers instruction and as directed.

Crack Treatment: Inspecting the surface for any cracks. Cracks if any have to be sealed with epoxy repair mortar after clean or removal of cover concrete and making 'V' groove of 20mm wide and 10mm deep cover crack line along the length of the crack by elctrically operated angle grinder with diamond concrete saw blade and cleaning it by air blower complete all as per manufacturers instruction and as directed.

Sealing of exposed 'V' groove of 20mm wide and 10mm deep with Sikadur 31 or equivalent solvent-free, moisture tolerant, thixotropic, structural adhesive and repair mortar, based on epoxy resins and special fillers, designed for use at temperatures between +10°C and +40 °C. Product should conforms to ASTM C 881-78, Type I, Grade 3, Class B+C : compressive strength > 60 N/mm2 (14 days) according to ASTM C881 : bond strength < 10 N/mm2 (7 days) according to ASTM C882 complete all as per manufacturers instruction and as directed.

M&L preperation of old painted concrete/bituminous pavement surfaces and painting lines, dashes, arrow, letters etc. exceeding 10cm width or girth and applying one coat of weather based acrylic runway marking paint white/Golden yellow colour as per existing complete all as per manufacturers instruction and as directed.

M&L preperation of old painted taxiway marking and turning pads of runway surfaces and painting lines, dashes, arrow, letters etc. exceeding 10cm width or girth and applying 2mm thick retro reflective marking paint white/Golden yellow colour as per existing complete all as per manufacturers instruction and as directed.

M&L racking out existing sealent from joints to a depth of 30mm, cleaning the grooves joints, edges up to depth of 15mm by scrapping/grinding by mechanical means to expose the concrete surfaces complete all as per manufacturers instruction and as directed.

Supply and inserting 12mm to 15mm thick compreesed nylon expansion joint board into the groove, over that inserting 12mm to 15mm dia closed cell baker rod maintaining uniform depth and application by filling the joint with PU sealent complete all as per manufacturers instruction and as directed.

Markson (BID ID -3095414)

bkgeneralstores (BID ID -3081281)