SPECIAL REPAIRS TO ROOF OF SEMI UNDERGROUND SUMP OF CAPACITY 14.5 LG AT TRISHUL LINE PUMP HOUSE UNDER GE (U) SECUNDERABAD

Amount

Preparing surface of RCC slabs ceiling, beams, columns, walls by carefully removing the loose plasters and damaged concrete portion in the RCC member completely by hand chiseling from the UG sump. The exposed surface has to be cleaned with wire brush to remove loose/ dust particles to receive further treatment. (Note: Special care and necessary safety measures shall be taken by the contractor/ applicator while doing the entire treatment for unforeseen falling off concrete debris from ceiling. Any damages caused to the RCC members including floor of UG sump shall be rectified by the contractor himself at his own expense.)

Preparation of exposed reinforcement and remove all loose corroded layers and cleaned to remove all loose scale and corrosion deposits to a bright condition by applying Re Arm rust remover / Rustolene/ 204 Rust remover and bring out the rust free reinforcement surface. (Note: Addition of reinforcement bar shall be measured and paid separately. Work should be done using the products mentioned above or equivalent products of manufacturers M/s MYK Arment/ Pidilite/ Dr. Fixit or as approved by GE)

Application of Re Arm Coat- ZP/ Friazinc R Zincanode 690 Zinc rich reinforcement epoxy on cleaned reinforcement bars to give long life and protection of from further formation of corrosion. In case the existing rebars have undergone considerable loss in diameter, additional reinforcement of similar diameter bars shall be provided and connected to the core RCC through proper shear connectors with Lokfix or equivalent product, anchoring grout all as specified and as directed. (Note: Addition of reinforcement bar shall be measured and paid separately. Work should be done using the products mentioned above or equivalent products of manufacturer M/s MYK Arment/ Sika/ Berger or as approved by GE)

Supply & Insertion of additional reinforcement wherever needed in different places to match with the existing bar diameter where existing reinforcement is depleted incl connection to existing reinforcement through proper stitching/ welding etc. and/or connection to the core RCC through proper shear connectors with Lokfix or equivalent product, anchoring grout all as specified and as directed.

Application of Re arm super bond/ Nitobond EP/ Chryso-DP a solvent free epoxy resin bonding agent containing pigments which will act as a bonding agent for bonding fresh wet cementitious materials to existing cementitious surfaces. Application should be done by approved professional applicators only. (Note: Work should be done using the products mentioned above or equivalent products of manufacturer M/s MYK arment/ Fosroc/ Chryso or as approved by GE)

Backing the entire treated surface with concrete mortar of average 40mm thickness mixed with 6mm stone chips, sand and cement in 1:1½ :2 ratio; within the specified period guided by the professional applicator after the application of previously mentioned bonding agent. The backing material should be prepared admixed with WP-10/ LW / Cico Super as specified by professional applicator. (Note: Rate includes necessary curing of the surfaces immediately after 24 hours of completion of work for minimum 7 days all as specified by the professional applicator. Work should be done using the products mentioned above or equivalent products of manufacturer M/s MYK Arment/ Dr. Fixit/ Cico or as approved by GE. Thicker sections can be built up in layers.The structural grade of repair mortar shall have the minimum specified characteristic compressive strength at 28 days.)

Taking down existing plastering in cement mortar of any thickness from ceiling etc and removal of rubbish from site.

Plastering the entire ceiling/ roof beams, including adjoining columns & walls, with 5 to 10mm thick in CM 1:3 mixed with Aqua Arm Proof WP-10/LW/Cico Super a single component chloride free integral waterproofing liquid admixture for concrete and mortar to minimize the shrinkage in cracks, permeability and increase the waterproofing properties. (Note: Rate includes necessary curing of the surfaces immediately after 24 hours of completion of work for minimum 7 days all as specified by the professional applicator. Work should be done using the products mentioned above or equivalent products of manufacturer M/s MYK Arment/ Dr. Fixit/ Cico or as approved by GE)

M&L Two coats of water proofing Epoxy coating Antifungal paint (potable water grade) incl preparation of newly plastered surfaces all as specified and directed. Make: M/s Asian Paint/ Dr.Fixit or equivalent brand as approved by GE.

Material and labour for necessary scaffolding arrangent for carrying the entire repair works safely for complete area of ceiling/ roof incl adjoining portion of columns, walls etc i.e; for appx 1900sqm total ceiling area with a roof height of 4.5m from floor of UG sump; all as directed by Engineer-in-charge. Note: Rate includes safe and steady platform with all essential safety arrangements for applicators to stand and carry out the entire repair works all as specified above. The scaffolding arrangent to be made right from the commencement of work and to be maintained in good and safe condition till the completion of entire work. Payment for this item will be paid only after successful completion of the entire repair works specified above.

G.MADAN MOHAN