Low Cost Concrete

Topics: Concrete, Portland cement, Tensile strength Pages: 9 (2944 words) Published: February 21, 2013
e ngine e ringcivil.co m http://www.engineeringcivil.co m/experimental-investigatio n-in-develo ping-lo w-co st-co ncrete-fro m-paper-industrywaste.html#mo re-1149

Experimental Investigation In Developing Low Cost Concrete From Paper Industry Waste ABST RACT Over 300 million tones of industrial wastes are being produced per annum by chemical and agricultural process in India. T hese materials pose problems of disposal and health hazards. T he wastes like phosphogypsum, f luorogypsum and red mud contain obnoxious impurities which adversely af f ect the strength and other properties of building materials based on them. Out of several wastes being produced at present, the use of phosphogypsum, f lurogypsum, lime sludge, hypo sludge, red mud, and mine tailing is of paramount signif icance to protect the environment. Paper making generally produces a large amount of solid waste. Paper f ibers can be recycled only a limited number of times bef ore they become too short or weak to make high quality paper. It means that the broken, low- quality paper f ibers are separated out to become waste sludge. All the inks, dyes, coatings, pigments, staples and “stickies” (tape, plastic f ilms, etc.) are also washed of f the recycled f ibers to join the waste solids. T he shiny f inish on glossy magazine-type paper is produced using a f ine kaolin clay coating, which also becomes solid waste during recycling. T his paper mill sludge consumes a large percentage of local landf ill space f or each and every year. Worse yet, some of the wastes are land spread on cropland as a disposal technique, raising concerns about trace contaminants building up in soil or running of f into area lakes and streams. Some companies burn their sludge in incinerators, contributing to our serious air pollution problems. To reduce disposal and pollution problems emanating f rom these industrial wastes, it is most essential to develop prof itable building materials f rom them. Keeping this in view, investigations were undertaken to produce low cast concrete by blending various ratios of cement with hypo sludge. T his project is concerned with experimental investigation on strength of concrete and optimum percentage of the partial replacement by replacing cement via 10%, 20%, 30%, 40%, 50%, 60% and 70% of Hypo Sludge. Keywords: Hypo Sludge, Pozzolanic Property, supplementary cementitious materials.

INT RODUCT ION General Energy plays a crucial role in growth of developing countries like India. In the context of low availability of non-renewable energy resources coupled with the requirements of large quantities of energy f or Building materials like cement, the importance of using industrial waste cannot be under estimated. During manuf acturing of 1 tones of Ordinary Portland Cement we need about 1-1? tonnes of earth resources like limestone, etc. Further during manuf acturing of 1 tonnes of Ordinary Portland Cement an equal amount of carbon-di-oxide are released into the atmosphere. T he carbon-di-oxide emissions act as a silent Killer in the environment as various f orms. In this Backdrop, the search f or cheaper substitute to OPC is a needf ul one. SOLID WAST E FROM PAPER INDUST RY Hypo Sludge Properties Where, this hypo sludge contains, low calcium and maximum calcium chloride and minimum amount of silica. Hypo sludge behaves like cement because of silica and magnesium properties. T his silica and magnesium improve the setting of the concrete. Fig 1- Raw Hypo sludge disposal f rom T NPL

Need For Hypo Sludge Utilization While producing paper the various wastes are comes out f rom the various processes in paper industries. From the preliminary waste named as hypo sludge due to its low calcium is taken out f or our project to replace the cement utilization in concrete. Due to the cement production green house gases are emitted in the atmosphere. For producing 4million tones of cement, they emit 1 million ton green house gases are emitted. Also, to reduce the...
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