SCOPE Essays - Construction, Building Materials, Concrete, Pavements

SCOPE This specification covers the general requirements of, filling sand in the floor and PCC in foundation as shown on the drawings and as directed by engineer and all operations covered within the intent and purpose of this specification. DRAWINGS Engineer will issue further drawings wherever, in his opinion such drawings are required to show areas to be excavated/filled, sequence of priorities etc. Contractor shall follow strictly such drawings. GENERAL Contractor shall furnish all tools, plants, instruments, qualified supervisory personnel, labour, materials, any temporary works, consumable, any and everything necessary, whether or not such items are specifically stated herein for completion of the job in accordance with specification requirements. SAND FILLING IN PLINTH AND UNDER FLOORS: After the available suitable excavated materials are exhausted as backfilling, the contractor shall notify the Engineer-in-Charge, of the fact and levels taken jointly with Engineer-in-Charge. The earth, murrum, sand, gravel etc. or such materials suitable for filling proposed to be filled under floors and so mentioned in the item of schedule of quantities shall then be brought to site from approved locations and sources. i ) Earth Filling: The earth, soft murrum etc. so brought shall be filled up in layers of 15 cm depth, each layer being well watered and consolidated by approved hand or mechanical tampers or other suitable means to achieve the required density. ii) Gravel or Sand Filling: Gravel if required to be filled under floors, shall be single washed gravel of approved quality and of size varying from 12 mm. to 20 mm. it shall be uniformly blinded with approved type of soil and/or sand to obtain full compaction. Gravel shall be filled in specified thickness and shall be well watered and rammed entirely to the satisfaction of the Engineer-in-Charge. If sand is required to be filled under floors, it shall be clean, medium grained and free from impurities. The filled in sand shall be kept flooded with water for 24 hrs. to ensure maximum consolidation. Any temporary work required to maintain sand under flooded condition shall be done by the contractor at his own cost. The surface shall then be well dressed and got approved from Engineer-in-Charge before any other work is taken over the fill. PAYMENT Measurement for payment of 'Sand Filling' shall be made on the basis of actual area filling in Square meter. Payment shall be made for the number of Square meter measured as per unit rate quoted in the Bill of Quantities. The unit rate shall include full cost of labor, tools/equipment, materials and all other costs necessary for the performance and completion of the Works in the workmanlike manner. PCC IN FOUNDATION PCC (1:1: 3) for Foundation Specification for Materials: Cement : Cement shall confirm to IS 269-1976. Ordinary Portland cement shall be used when no type is specified. The weight of OPC shall be taken as 1440kg per cu. m. and rapid hardening cement as 1210kg per cu. m. Each bag of cement should be undisturbed and scaled 50kg. Tests : Tests for cement are carried out as indicated IS 269-1958. Ordinary cement stored for more than 2 months from the date of receipt from the factory shall be subjected to test and used only found satisfactorily. Storage : Cement must be fresh and stored on planks raised 15 to 20cm away from the walls. Not more than 15 bags shall be stacked vertically in one pile and maximum width of the pile should not be more than 3m. Sand: Sand shall confirm to IS 383-1965. It shall be river sand or pit sand. It shall be free from mica. Clay, silt content must not be greater than 5%. If so, sand shall be washed before use. Sand shall be well graded. Coarse Aggregate: It shall confirm to IS 383-1965. Water: Portable water shall be used for mixing concrete and curing the work. Combination of materials : Proportion: The proportion of cement, sand and aggregate shall be 1 part cement, 3/2 part sand and 3 part coarse aggregate. Batching/measurement: The measurement of cement sand and aggregate shall be by weight. If less than 1 cubic meter by volume', shall be permitted. Mixing: Cement, sand and aggregate shall be mixed in mechanical mixture