ADDN/ALTN TO SWTs AT AFS HASI MARA

Taking down cement plaster of any description any thickness incl racking out joints hacking for keys scrubbing down with water etc, complete all as specified and directed.

Drilling and fixing injection packers in structural concrete, including drilling holes 12mm diameter at the intervals as per recommendation of engineer in charge. The holes must be cleaned by air blower prior to fixing nozzles. Fix Packer 98 mm diameter, 10cm long, with high strength steel screw and structured rubber sealing, in cleaned holes. Finally, the packers must be cut by cut of wheel after completion of grouting and sealed with polymer modified cementitious putty / Epoxy adhesive without damaging structural elements, complete all as per specified and directed.

M&L for water-stopping crack injection resin. Semi-flexible, single component, low viscosity, polyurethane, when injected into cracks in concrete, the resin shall form a slightly Semi - flexible and impermeable barrier in both dry and damp conditions. The semi- flexible, low viscosity, polyurethane, crack injection resin system shall have the following properties; cream time of 12 +/- 5 sec depending on temperature at 10% accelerator dosage, rise time of 48 to 55 sec at 25 degree centigarde temperature and 10% accelerator dosage; viscosity of 350 to 450 mPa at 25 degree centigarde, density of 1.08 +/- 0.05; etc, complete all as per specified and directed.

M&L for nozzle grouting to be done with cement slurry admixed with expanding grout admixture mixed @ 225 gm per bag of cement, as per manufacturers instructions, complete all as per specified and directed.

M&L 15mm thick rendering in CM (1:4) on fair faces of brick work or concrete surfaces finished surfaces even and smooth without using extra cement, complete all as specified and directed.

Supply only liquid water proofing compound conforming to IS: 2645 - 1975 specification, complete all as directed.

Providing and applying two component, liquid-applied, solvent-free, polyurethane waterproofing coating used for long-lasting waterproofing and protection of tanks. It cures by reaction (cross-linking) of both the components having properties of Content: 100%, Elongation at Break (ASTM D 412) : >60%, Adhesion to concrete (ASTM 7234) > 1 Mpa, Hardness (Shore À Scale) (ASTM D 2240) : 70 +/- 5, Resistance to Water Pressure (ASTM D 5385) : No leak upto 70m, Hydrolysis (5% KOH, 7days cycle) (in house Lab) : No significant elastomeric change, Pot life (In house Lab): 30min @ 20 degree centigarde, Tack Free Time (Conditions: 20 degree centigarde, 50% RH) : 6-8 hours, Light Pedestrian Traffic Time(Conditions: 200C, 50% RH) : 24 hours, Final Curing time (ponding test) (Conditions: 20 degree centigarde, 50% RH) : 7 days, Chemical Properties(ASTM D 1308) : Good resistance against acidic and alkali solutions (5%), detergents, seawater and oils. Not suitable for contact with industrial wastes, Service Temperature(in house Lab) : - 30 degree centigarde to + 90 degree centigarde, complete all as per specified and directed.

Taking down 20mm bore steel water tubing and connection from wall /ceiling surfaces including cleaning for re-fixing or removing from site of work, complete all as specified and directed.

S&F galvanised steel water tubing and connection, medium grade, 20mm bore with all fitting, fixed to wall or in ceiling, complete all as specified and directed.

S&F in repairs 20mm bore gun metal, globe or gate valve, ISI marked, with iron wheel head, screwed both ends for iron pipe, complete all as specified and directed.