ONSTRUCTION OF GOVT. GIRLS INTER COLLEGE AT RAJAPUR DISTT. CHITRAKOOT

Demolishing R.C.C. work manually/ by mechanical means including stacking of steel bars and disposal of unserviceable material within 50 metres lead as per direction of Engineer - in- charge

Extra for cutting reinforcement bars manually/ by mechanical means in R.C.C. or R.B. work (Payment shall be made on the cross sectional area of R.C.C. or R.B. work) as per direction of Engineer-in-charge

Demolishing brick work manually/ by mechanical means including stacking of serviceable material and disposal of unserviceable material within 50 metres lead as per direction of Engineer-in-charge.In cement mortar

GROUTING WORK OF HONEYCOMB STR 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 make

RE-BARING OF SUITABLE DIAMETER OF REINFORCEMENT BAR Drilling suitable holes in reinforced or plain cement concrete with power driven drill machine to a minimum depth of 100 mm upto 200 mm in RCC beams, lintels, columns and slabs to introduce steel bars for sunshades/balconies including fixing the steel 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 including 12 mm dia.

In-filling / sealing of joint between RCC lintel cum sunshade and wall (on external side) in all floors by pushing in Grout RW/equivalent in paste form and coving 20 mm x 20 mm after applying a coat of Zycosil/equivalent & zycoprime/equivalent solution before cement plastering of top, bottom and sides of RCC sunshade

RC-JACKING OF CONCRETE COLUMN 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 wire brushes etc. and disposal of debris for all lead and lifts all complete as per direction of Engineer-In-Charge 75 mm average thickness

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 12 mm diameter

Providing and laying SBR Polymer modified (of approved make @ minimum 2% by wt. of cement used) plain/reinforced concrete jacket for the structural members e.g. columns, pillars, piers, beams etc with concrete having the specified minimum characteristic compressive strength [with ordinary portland cement, coarse sand and graded stone aggregate of 10 mm maximum size in proportion as per design criteria] with specified average thickness all-round existing core of RCC member. Note: Rates shall be for finished surface area of concrete and shall include the cost of making holes in existing RCC slab, if required, for pouring concrete in shuttering mould of jacket and appropriate approved Super-Plasticiser for rendering concrete as flowable self compacting and SBR polymer but shall exclude cost of reinforcement, bond coat, Shear Keys, centering and shuttering, strutting, propping etc (Payment under this item shall be made only after proper wet curing has been done and surface has been satisfactorily evaluated by sounding/tapping with a blunt metal instrument) 75 mm thick in Grade M25 with cement content not less than 330 kg per cum

Structural strengthening, of Carbon Fiber Reinforced Polymer (CFRP) Accessibility and existing damage to the concrete surface, Structural strengthening, of Carbon Fiber Reinforced Polymer (CFRP) wrapping for Ground Floor beams, two or more layers High-strength unidirectional fabric or precured laminates.The CFRP wrapping of reinforced concrete (RC) beams is a structural strengthening technique designed to improve flexural strength, shear capacity, and ductility, often used as an alternative to traditional steel jacketing. The method involves applying high-strength Carbon Fiber Reinforced Polymer (CFRP) sheets or plates to the tension face and/or sides of a concrete beam using epoxy resin, followed by curing to form a composite system.Surface Preparation: Remove plaster, dirt, and damaged concrete. Smooth the surface using a grinder, rounding corners to a radius of at least 20mm to prevent stress concentrations. Surface Cleaning: Remove dust using compressed air and clean with acetone. Primer Application: Apply epoxy primer to seal surface pores and enhance adhesion. Resin/Adhesive Application: Apply bonding resin (epoxy putty) to the beam surface. CFRP Application: Apply the CFRP sheet/fabric. Use a grooved roller to press the sheet, ensuring it is flat, tight, and that resin penetrates the fibers while removing air bubbles Flexural Strengthening (Underside Wrapping): CFRP plates or sheets are bonded to the tension face (underside) of the beam, parallel to the longitudinal axis. This increases the bending capacity and stiffness.Shear Strengthening (U-Wrapping): To increase shear resistance, CFRP sheets are wrapped around the sides and bottom of the beam, forming a "U" shape. These are typically placed perpendicular to the longitudinal axis. Complete Wrapping: The beam is fully enclosed with CFRP sheets, providing the highest increase in strength and durability but is often restricted by limited access around the beam, Anchorage System: To prevent premature debonding of the CFRP from the concrete, anchors—such as CFRP U-wraps or spike anchors (anchors made of fiber bundles inserted into drilled holes)—are used at the ends of the sheets