PSI - Issue 18

Sana Gul et al. / Procedia Structural Integrity 18 (2019) 101–107 Sana Gul/ Structural Integrity Procedia 00 (2019) 000–000

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2.3. Shredding of Rubber Tires Tires were shredded by using tire shredding machine. Thin thread like shreds were made of rubber tires. Along with the rubber threads the steel fibers in rubber tires were also cut into standard sizes ranging from 1 to 4 inch.

Fig. 2. size distribution of steel fibres

3. Sample Preparation 3.1. Formulations Mixing Regime

A typical formulation such as formulation-2 shown in Table 3 can be read as having 1% OPC Cement 2 % fine aggregate, 4 % coarse aggregate, and 1% replacement of SRSF by volume of concrete for 12x6 inches standard cylinders according to ACI mix design method. Rest of the formulations can be understood accordingly.

Table 3 Formulations and mixing regime

Cement Kg /m³

SF Kg /m³

SRSF Kg /m³

Fine Aggregate Kg /m³

Coarse aggregate Kg /m³

S. No.

Formulation-1

174.38

12.2

0

348.77

697.54

Formulation-2

174.38

0

12.2

348.77

697.54

Formulation-3

174.38

61

0

348.77

697.54

Formulation-4

174.38

0

61

348.77

697.54

Water to cement ratio was 0.5 for all the batches.

3.2. Casting Concrete specimens having standard size 12 inches x 6 inches were casted to determine compressive strength and split tensile strength after 28 days of curing. For uniform consistency, concrete mixer was used for preparation of