Repair and Retrofitting of Slab at NBCC Bhawan, Lodhi Road, New Delhi

Chipping of unsound/weak concrete material from

slabs, beams, columns etc. with manual Chisel and/ or

by standard power-driven percussion type or of

approved make including tapering of all edges, making

square shoulders of cavities including cleaning the

exposed concrete surface and reinforcement with

26.28 wire brushes etc. and disposal of debris for all lead

and lifts all complete as per direction of

Engineer-In-Charge

26.28.2 50 mm Average Thickness SQM 650.00 211.55 137507.50

Cleaning of reinforcement from rust from the

reinforcing bars to give it a total rust free steel

surface by using alkaline chemical rust remover of

approved make with paint brush and removing

loose particles after 24 hours of its application with

wire brush and thoroughly washing with water and

allowing it to dry, all complete as per direction of

Engineer-In- Charge.

26.29.1 Bars upto 12mm diameter METER 4000.00 6.65 26600.00

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Date: 2023.06.03 17:21:42 IST

Drilling suitable holes in reinforced or plain cement

concrete with power driven drill machine to a

minimum depth of 100mm upto 200mm in RCC

beams, lintels, columns and slabs to introduce steel

bars for sunshades/balconies including fixing the steel

26.30 bars in position using epoxy resin anchor grout of

approved make but excluding the cost of

reinforcement, all complete as per direction of

Engineer-In- Charge.

26.30.1 upto and inculding 12mm dia. EACH 600.00 121.95 73170.00

Steel reinforcement for R.C.C. work including

straightening, cutting, bending, placing in position and

5.22A binding all complete above plinth level.

5.22A.6 Thermo-Mechanically Treated bars of grade Fe-500 or more. KG 5257.00 89.65 471290.05

Providing, mixing and applying bonding coat of

approved adhesive on chipped portion of RCC as per

26.31.2 specifications and direction of Engineer-In-charge

complete in

all respect.

Epoxy bonding adhesive having coverage 2.20 sqm/kg of

approved make.

Centering and shuttering including strutting, propping etc.

5.9 and removal of formwork

5.9.3 Suspended floors, roofs, landing, blaconies and access platform SQM 650.00 766.55 498257.50

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Date: 2023.06.03 17:21:42 IST

Providing and injecting approved grout in proportion

recommended by the manufacturer into cracks/honey-

comb area of concrete /masonry by suitable gun/ pump

at required pressure including cutting of nipples after

curing etc. complete as per directions of Engineer-in-

Charge. (The payment shall be made on the basis of

actual weight of approved grout injected.)

Epoxy injection grout in concrete/RCC work of approved

M&L (Material & Labour) for encasement to

columns/beams/pardi etc. with free flow high

strength non shrink micro concrete M-40 using single

component cement micro concrete shrinkage

components and added with 100% by weight saturated

dry stone dust water cement ratio shall be maintained

properly as per manufactures specifications to achieve

dense solid mass prepared micro concrete shall be

poured properly as per in prefixed holding boards

slurry tight form work properly aligned to required size

and shape and well-oiled air bubbles if any shall be

MR1 removed by tapping the boards removing the boards CUM 45.00 54000.00 2430000.00

after 24 hours and curing the micro concrete thoroughly

for 14 days cost inclusive of curing etc. complete. (Note:

Micro concrete mixing with 6mm down size

aggregates in the ratio of 1 part micro concrete with 0.3

part of aggregate by weight.) complete all as directed at

site Engineer-in-charge.

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Date: 2023.06.03 17:21:42 IST

M&L (Material & Labour)for applying two coats of

anticorrosive epoxy phenolic rebar protective system

IPNet RB or equivalent of approved make and quality

comprises of resin and hardner mixed in equal proportion

by volume with minimum 9-10 hours between

the coats,sprinkling dry sand when 2nd coat is tacky

MR2 so as to provide rough finish and ensuring air SQM 650.00 320.00 208000.00

curing of minimum 10 hours after the top coat before

any subsequent treatment etc. complete all as directed by

Engr-in- charge

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Date: 2023.06.03 17:21:42 IST

FIBER BAND - SLAB ( 400 GSM)Strengthening structural

elements with non metallic composite fiber wrapping

system comprise of uni-directional carbon fiber sheet

(400 GSM) and compatible saturant, by wet layup system

including surface preparation ( Grinding/Moulding

concrete substrate, cleaning it with wire brush, removing

oils, laitance if present, rounding sharp edges to min

25mm radius) etc. complete including Profiling, Applying

compatible primer on prepared substrate, Filling the holes

and uneven surface with thixotropic putty etc. complete,

Mechanized wetting of fiber sheet: Cutting the fabric to

Mr3 required size. Mixing of saturant and filling in tub area of RTM 1,350.00 730.00 985,500.00

the saturation machine. Placing the fiber on metallic rods

and pass through the rollers of machine and saturant tub

ensuring complete wetting (65% fiber volume fraction) of

fibers. Remove the fiber on rod and place the new fiber

sheet. Wrapping: Wrapping the fiber sheet to structural

element at desired orientation using tamping roller to

avoid any air voids etc. repeat the same procedure for

multiple layer with the interval of 8 hrs. Second Coat:

Applying second coat of saturant after min. 12 hrs, rectify

air voids if any . (Cost of carbon fibre anchor to be paid for

seperately) (Mode of measurement: Per RMT of carbon

fiber sheet consumed and not surface area of application)

SURFACE PREPARATION FOR ALL CONCRETE SURFACES

Preparing the surface by completely removing the existing

loose bituminous coating and the brickbat coba, damaged

plaster, mortar, loose concrete, oil, grease and dust with

the help of chisel, scrapers & wire brush or high-pressure

water jetting [> 300 bars].

TREATING CRACKS AND JOINTS

For Cracks > 1.5 mm

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Pressure injecting a premixed fine polymer based

cementitious injection grout, such as SS – WaterStop FC

or equivalent, shall be used to grout the voids, cracks and

joints in RCC slab elements.

Payment will be made on the basis of weight of

prepacked grout consumed & shall include cost of

materials, packers, machinery, labour, scaffolding etc.

Grouting to continue until rejection.

Hi Performance PU Grouting to fill fine voids, cavities and

leaking cracks for Cracks < 1.5 mm

Injecting and sealing of cracks in Terrace Slab by injecting

a suitable moisture tolerant PU Injection system by

Injection such RascoFlex PU 110X / Rascoflex PU 309L or

equivalanet.[if load bearing capacity is to be enhanced]

[Supplied by Assess Build Chem] using an approved

mechanical pump.

Application including drilling holes of 12 mm diameter for

a depth of 30mm to 50mm along the crack at specified

spacing and cleaning the hole with compressed air and

inserting PVC nipples into pre-drilled holes and sealing the

joint peripherally with epoxy putty and removing the

same after grouting.

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Date: 2023.06.03 17:21:42 IST

Injecting the resin into the crack, curing, removing the

packers and sealing the hole with epoxy putty, as

specified and staging / scaffolding etc. complete.

(Payment shall be made on the basis of weight of the

resin & hardener consumed). Grade of PU shall be as per

manufacturer’s recommendation to suit the crack width

and conditions.

The applicator shall restore the concrete surface to the

satisfaction of the client or his representative.

Recommended Treatment for Corners, Joints and pipe

penetrations

All joints, corners and interfaces should be treated by

Providing and applying a thin high tenacity, special coated

3-ply tape such as SS – JointSeal FT or equivalent, having a

high extension, in cross direction and excellent toughness

lengthwise.

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The tape should be composed of polypropylene non-

woven fabric sandwiching and an ageing resistant

thermoplastic elastomeric fabric. The flashing tape should

be resistant to chemicals such as 3% HCl, 35% H2

Citric Acid, Lactic Acid, KOH [3%, 20%], Na Hypochlorite,

Salt Water [2%]. The tape should be resistant to water

pressure > 1.5 bar. The flashing tape should be

overlapped by 5 cm at joints.

Mr4 Sqm. 450 625 281250

The flashing tape shall be applied to all horizontal and

vertical corners and pipe penetrations by adhering it using

the waterproofing Coating SS – FlexProof PU or equivalent

Coating Consumption ~ 1.5 kg / m2 & Membrane

Consumption ~ 0.1 sqm per layer. Rate includes materials,

applications and tools and tackles.

Expansion Joints

All expansion joints should be treated by providing and

applying Chemically Resistant Flexible Polyolefin based

High Performance Waterproofing Tape, such as SS –

JointSeal T1 or equivalent for Use as an Expansion Joint

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The tape should be composed of a flexible polyolefin

material. The flashing tape should be resistant to

chemicals such as 3% HCl, 35% H2SO4, Citric Acid, Lactic

Acid, KOH [3%, 20%], Na Hypochlorite, Saltwater [2%].

The tape should have an elongation > 600% in either

direction, a shore A hardness > 85, and UV Resistance.

The tape should be resistant to water pressure > 4.0 bar.

The flashing tape should be overlapped by 5 cm at joints.

The expansion joint tape shall be applied to all horizontal

and vertical expansion joints by adhering it using a

Solvent free, Universal Epoxy Bonding Compound, such as

SS – StructoBond EP or equivalent. Rate includes

materials, applications and tools and tackles.

WATERPROOFING OF PREPARED TERRACE WALLS AND

FLOOR AREAS

Alternatively, for Large Roofs

Providing and applying a One Component, Elastomeric,

Ready to Use, Membrane Forming Polyurethane

Waterproof Coating for Roofs, Walls, Slabs or Masonry

such as SS – FlexProof PU or equivalent , over the

prepared terrace slabs. Sprinkle sand over second coat,

when wet to provide mechanical key for plaster. The

material should meet the following minimum criteria:

Crack Bridging Ability: > 2.5 mm

Elongation: > 400%

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Date: 2023.06.03 17:21:42 IST

Tensile Strength: > 4 MPa

UV Resistance [400 hours]: Passes

Salt Spray Test [400 Hrs]: Passes

Consumption: 1.5 to 2.0 kg / sq. m.

Lightweight Fill / Brickbat Coba Laid to Slope [Optional]

Providing and applying lightweight fill / brickbat coba to

provide slope and wearing course. The cement mortar for

laying Brickbat coba / lightweight fill should incorporate a

High Performance, Hydrophobic, Pore Blocking, Integral

Waterproofing Additive for Concretes and Mortars such

as SS – ConProof HP or equivalent, at a consumption of

1.0% by weight of cementitious material or minimum 0.5

kg / bag of cement. The fill should be cured either by

water or by means of ready to use liquid membrane

forming curing compound SS – CureSeal AC or equivalent

Total 5603342.55

Digitally signed by AMIT

Date: 2023.06.03 17:21:42 IST