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2 INTERNATIONAL CONFERENCE ON CURRENT TRENDS IN TECHNOLOGY, ‘NUiCONE – 2010’ to assist in producing workability and uniformity. In this investigation locally available river sand is used which is free from organic impurities. The specific gravity of this fine aggregate was found to be 2.62 and the fineness modulus was 2.86. The percentage of passing is within the limits as per IS383-1970 [10] and IS 2386-1963[12]. Sand is confirming to zone II. S. No 1 2 3 4 5 6 7 Parameter pH Chlorides Alkalinity Sulphates Florides Organic Solids Inorganic Solids Results 6.53 40 mg/l 6 ml 131 mg/l 0.03 mg/l 50 mg/l 130 mg/l Limits IS: 456[8] 6.5 – 8.5 2000 mg/l (PCC) 500 mg/l (RCC) < 25ml 400 mg/l 1.5 mg/l 200 mg/l 3000 mg/l TABLE II SIEVE ANALYSIS OF FINE AGGREGATE IS Weight %of Cumulative Sieve retained weight %of weight %of passing High density Polyethylene Fiber (HDPE): HDPE is a linear polymer with the chemical composition of polyethylene and defined by ASTM D1248-84 [13] as a product3 of ethylene polymerization with a bulk density of 0.94gm/cm or higher. retained retained 10 0 0 0 100 4.75 57 5.7 5.7 94.3 2.36 92 9.2 14.9 85.1 1.18 112 11.2 26.1 73.1 600 292 29.2 55.3 44.7 300 308 30.8 86.1 13.9 150 124 12.4 98.5 1.5 Total cumulative % of 286.6 weight retained Coarse Aggregate: The material whose particles are of size as are retained in 4.75mm IS sieve is termed as coarse aggregate. The coarse aggregate used here is 20mm in size, crushed angular shape and free from dust. The specific gravity and fineness modulus was found to be 2.80 and 7.007 respectively. The percentage of passing is within the limits as per IS383-1970[10] and IS 2386-1963[12]. TABLE III SIEVE ANALYSIS OF COARSE AGGREGATE S. No 1 2 3 4 TABLE V PROPERTIES OF HDPE FIBER Test Tensile breaking load at yield Tensile breaking load at break Tensile elongation at break Identification III. MIX PROPORTIONS Result 67.79Kg 2.78Kg 26.91% High Density Polyethylene IS Weight Sieve retained %of Cumulative % weight of weight passing retained retained Mix design is the process of selection suitable ingredients of concrete and determining their proportions with object of producing concrete of certain maximum strength and durability as economical as possible. The concrete mix is designed as per IS 10262 – 1982 [7], IS 456-2000 [8] and SP23 [9]. The following table gives the materials required for the M25 grade concrete. Water cement ration is 0.45 and mix proportions are given in below table. % of 40 0 0 0 100 20 1710 17.1 17.1 82.9 10 6650 66.5 83.6 16.4 4.75 1640 16.4 100 - 2.36 - - 100 - 1.18 - - 100 - 600μ - - 100 - 300μ - - 100 - 150μ - - 100 - Total cumulative % of 700.7 weight retained Water: water to be used in the concrete work should be free from oils, acids, alkalies and other organic and inorganic impurities. TABLE IV PROPERTIES OF WATER TABLE VI M25 CONCRETE MIX PROPORTIONS S. No 1 2 3 4 Materials Cement Fine aggregate Coarse aggregate water Quantity in kg/m3 327 726 1198 147 IV. MIXING AND CASTING Mixing has to done carefully so that the uniform dispersion of fibers and prevent the segregation or balling of the fibers. The present experimental study of HDPE fiber includes testing of specimens for compressive, split tensile and flexural strengths. Specimens are prepared using design mix with HDPE percentages starting from 0.5 to 6% with an increment of 0.5 by volume of concrete. Cubes 150 X 150 X 150 mm, cylinders with 150φ X 300mm and beams of sizePDF Image | Behaviour of HDPE Fiber Reinforced Concrete
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