Cement Energy and Environment

s No Designation % of % of Average weights Variation with respect % va/~ationf with R k . C.A L.W.A of cubes in kg to reference mix respec o_re erence emar s IllIX LM1 100 0 2.49 0 0 2 LM2 100 0 2.528 0.038 ' 3 LM3 100 0 2.543 0.053 2.12 4 LM4 ,, 75 25 2.23 -0.26 "-10.44 5 LM5 75 25 2.35 -0.14 -5.62 6 LM6 75 25 ~- 2.41 -0.08 -3.21 7 LM7 50 50 2.2 -0.29 -11.64 8 LM8 ., 50 50 2.23 -0.26 -10.44 9 LM9 50 50 2.29 -0.2 -8.03 10 -LM10 25 75 1.n -0.72 -28.91 . 11 LM11 25 75 1.88 -0.61 -24.49 12 LM12 25 75 1.92 -0.57 -22.89 13 LM13 0 100 1.64 -0.85 -34.13 <I 14 LM14 0 100 1.72 -o.n -30.92 15 LM15 0 100 1.84 -0.65 -26.10 Reference 16 LM16 100 0 2.53 0.04 1.60 mix 17 LM1 7 100 0 2.54 0.05 2.00 18 LM18 100 0 2.552 0.062 2.48 .. 19 LM19 75 25 2.4 -0.09 -3.61 20 LM20 75 25 2.41 -0.08 -3.21 21 LM21 75 25 2.47 -0.02 -0.80 22 LM22 50 50 2.33 -0.16 -6.42 23 LM23 50 50 2.37 -0.12 -4.81 24 LM24 50 50 2(39 . -0.1 -4.01 25 LM25 25 75 2.04 -0.45 -18.07 26 LM26 25 75 2.07 ' -0.42 -16.86 27 LM27 25 75 2.09 -0.4 -16.0.6 28 LM28 0 .100 1.72 -o.n 29 LM29 9 30 Fig.1 : variation of concrete weight with percentage of light weight aggregate(1% fibre) Flexural Tensile St rength of Various and 75% the flexural strengths are increased by Combinations 5.0%, 10%, 17.5%and 40% when 20% fly ash and When mineral admixtures of 20%fly ash and 10% CSF are added compared to the mixes 10% of CSF are added the respective values are without admixtures. When steel fibres are added to 4, 3.8, 3.6 , 3.3 and 2.4 N/ mm2. Hence use of the mix the flexural strengths are further increased mineral admixture like fly ash up to 20% and CSF considerably. For 1% fibre the increases in the up to 10% is contributing towards increase in the flexural strengths are 7.89%, 9.09% and 12.82% flexural strength. For replacements of 25%, 50%, respectively. 51