reinforced concrete dust bins
1962 Edition

The standard specifies dust bins in cylindrical and square shapes with defined internal measurements. Cylindrical bins range in internal diameter from 500 mm to 1200 mm and heights from 750 mm to 1000 mm, designated as C1 through C4. Square bins have side lengths from 500 mm to 1200 mm with heights between 750 mm and 1000 mm, labeled S1 through S4. Bottoms may be furnished with or without reinforcement depending on purchaser requirements, with dimensions conforming to the relevant tables in the standard. These standardized sizes facilitate uniformity in municipal waste management infrastructure.

The standard recommends using Portland cement conforming to IS 269-1958, including Ordinary, Rapid Hardening, or Low Heat types. Concrete for the dust bins should be designed to provide durability and strength suitable for exposure and handling. Although the standard references nominal mix proportions, a typical mix ratio employed is 1 part cement to 2 parts sand to 4 parts aggregate by volume. The water-cement ratio should be controlled to ensure workability without compromising durability. Reinforcement must be designed to prevent cracking and maintain structural integrity, and aggregates must be clean and well-graded.

Reinforcement is detailed according to bin size and shape. Cylindrical bins (C1 to C4) require concrete shell thicknesses between 35 mm and 65 mm, with hoop reinforcement typically 6 mm bars spaced at 100 to 200 mm centers, and vertical reinforcement also 6 mm bars at specified spacings. Square bins (S1 to S4) have similar thickness ranges with horizontal and vertical 6 mm bars spaced between 100 mm and 200 mm centers. Bottom slabs, when provided, have thicknesses from 35 mm to 65 mm with two-way reinforcement of 6 mm bars at 100 mm spacing. These specifications ensure adequate strength and durability under service conditions.

Doors must be appropriately sized—typically 300 mm by 250 mm for smaller bins and 400 mm by 350 mm for larger ones—and located near the bin base. They should fit tightly without gaps to prevent leakage of waste. Door frames must be flush with or below the bottom slab level if provided, or without a bottom rim if no slab exists. Internal surfaces and corners must be smooth with radius no less than 25 mm to avoid dirt accumulation and facilitate cleaning. Additionally, floors inside the bins should slope toward the door opening to aid drainage and cleanliness.

The standard permits dust bins to be provided either with or without a reinforced concrete base according to purchaser preference. When included, bottom slabs should have thicknesses ranging from 35 mm to 65 mm depending on bin size, and incorporate two-way reinforcement using 6 mm diameter bars spaced at 100 mm centers in both directions. This reinforcement supports structural stability and durability. Supplying bins without bottoms allows flexibility for installation on site conditions where a base slab may not be needed.