Delhi Development Authority Tender

Surface dressing of the ground including removing vegetation and inequalities not exceeding 15 cm deep and disposal of rubbish, lead up to 50 m and lift up to 1.5 m. (a) All kinds of soil

Chemical cleaning of inner Plaster surface to clean from yellowness, blackness, lime and gypsum deposits by using ammonia, teepol and other chemicals and applying of fungicides.

Chemical cleaning of stone surface to clean from yellowness, blackness, algae growth, dust, dirty oil accretions, lime and gypsum deposits, soot, graffiti, joining of gaps, taking out nails and other additions, removal of multiple layer of enamel pait/other paint/ geru layer , filling oh holes/ voids in marble /stone and application of preservatives coating ( pva -lavolin base ) to prevent superficial decay, under the strict supervision of archaeological chemist or art conservator. For Vertical and flat surfaces etc

Providing and applying antifungal wash treatment using 3% solution of sodium pentachlorophenate, of reputed brand and manufacturer, on cleaned stone surface at desired locations as per direction of Engineer-in-charge (The rate is inclusive of all materials & labours involved except scaffolding)

Consolidation of loose/ damaged stone masonry with hard stone in super structure above plinth upto five floor level including carefully dismantling of stone, cleaning of mortar and reconsolidating using old reusable stone and new stone both as per site condition and availability of old reusable stone for masonry with Lime Mortar 1:1:1 Lime putty: 1 Surkhi: 1 Coarse sand) (a)Considering 75% reusable old and 25% new stone

Consolidation of loose/ damaged stone masonry with hard stone in super structure above plinth upto five floor level including carefully dismantling of stone, cleaning of mortar and reconsolidating using old reusable stone and new stone both as per site condition and availability of old reusable stone for masonry with Lime Mortar 1:1:1 Lime putty: 1 Surkhi: 1 Coarse sand) (a)Considering 50% reusable old and 50% new stone

Raking out joints of stone masonry surface to the required width and depth, with due care and precaution, by mechanical/ manual means, including preparing and cleaning the surface for re-pointing/ refilling of joints, including disposal of rubbish to the dumping ground within 50 metre lead.

Lime grouting using ratio 1:1 lime and 1 sand/surkhi or as specified by Conservation Consultant / lime grout manufactured under stiff factory conditions (Mape-Antique I or equivalent make) for superior strength to fill all gaps/voids/air pockets visible from bottom of the slab to densify the slab and enhance the contact area within the slab. The lime grout shall be a cement free, fluid hydraulic binder in powder form which should form an injectable slurry made from lime, Eco-pozzolan, natural ultra-fine sand and special additives according to a formulation developed under factory conditions. When mixed with water in mixratio 100:35 (lime powder: water) in a suitable clean container, the lime grout forms a fluid, volumetrically stable injection slurry resistant to salts which is easy to inject with a manual or electronic pump or by gravity casting in structures with cracks, gaps or internal cavities. Once hardened, the properties of slurry made using lime grout, such as mechanical strength, modulus of elasticity and porosity, are very similar to slurry made using lime, lime-pozzolan or hydraulic lime originally used in the construction of old buildings. The lime slurry, shall also have properties which make the product resistant to various chemical-physical aggressive phenomena, such as the presence of soluble salts, freezethaw cycles and alkali-aggregate reactions. Apart from the above, the lime grout must have the following characteristic - Appearance - Powder, Colour - White, Maximum size of aggregate - 100, Bulk density (kg/m3) - 1100, Consistency of mixture - Superfluid, Bleeding - Absent Compressive strength after 28 days (N/mm2)-18

Repointing of raked out joints of Random rubble masonry by using lime mortar 1:1:1 (1 Lime: 1 coarse sand: 1 Brick jeera)

Plinth Area Protection using Lime concrete around the building to prevent entry of water by dampness and capilary rise (Lime concrete 1:3:6 up to 100mm thick)

Stone flooring by using Selected Qurtzite stone .Stone 250x200x150 thick with filling the joints maximum 12mm uniformly wide with lime mortar 1:1:1 (1lime:1Surkhi:1coarse sand) including pointing the joints of .Stone floor with basic lime mortar mix with 40% brick zeera Av. 6mm nominal size and mixing with gur Belgiri.

Replastering on the interior or exterior of the monument upto height of 15m above ground level in two coats with 1st coat 30mm thick mixed with1/3 brick zeera 5 to 10 mm nominal size & 2nd coat 20mm thick in lime mortar 1:1:1 (1 Lime: 1 Surkhi: 1 Coarse sand) mixed with Gur/sheera & belgiri.

Stone consolidation‐removing the loose/damaged stone and reconsolidating with new stone/reusable stone with lime mortar (1:2) wherever necessary. Careful re-fixing of the removed Stone Masonry by using rich lime mortar (if necessary by providing M.S. flat cramps, raking of joints & pointing as per site condition & instructions/guidance of engineer- in-charge)