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Recent development in food grain storage structure for kohlan area Jharkhand

Author: 
Maheedhar Reddy, Paswan, M.K., Dhanunjay, V.G., Krishna Bhargav, N.S. and Nishi Kant
Abstract: 

Recent Innovative, cost efficient and sustainable farm structure of 1 tonne capacity from locally available late rite stone with cement as binder and R.C. Cas roof was designed. Engineering properties of the food grain(variety paddy, wheat etc) were determined. The engineering properties of the late rite stone were recorded as compressive strength (510 N/cm2) and water absorption. Traditional theory was used to design the height and diameter of the bin. Safe height of the bin was 1.6 m and the diameter was 1.2 m. Maximum lateral pressure exerted by the paddy and other grain grains on the wall of the bin of the designed dimensions was 248.78 kg m-2. Design wall thickness, depth of foundation and total load supported by the foundation was 150 mm, 750 mm and 7935.93 kg m-2, respectively. Roof of the bin was designed as a circular R. C. C. slab with its Design thickness of 100 mm and design diameter of the reinforcement was 6 mm with 140 mm c/c spacing. Total span of the roof is 2 m with 0.2 m overhangs. Laterite bin was constructed according to the dimensions determined by calculations. The total cost of the structure is7275 INR. Assumptions considered are as follows average paddy temperature remains nearly constant throughout the day. Axial temperature was greater than the peripheral because of heat added by the respiration of the paddy grains. Average moisture content of the paddy in to player was greater than that in the bottom layer. Moisture gradient due to difference in relative humidity has might have resulted in wetting upper paddy to become wet. Relative humidity inside the bin was greater than the outside because of vapour addition by the respiration of the stored paddy.

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