*On May.11.13 , In Compressive Strength , by barry*

*4.1 Analysis*

A total 216 concrete cube (15 x 15 x 15 cm) have been casted for different proportions & curing periods. After the experimental process completed, the data obtained from the experiment are collected, recorded, analyzed and discussed in this chapter in the form of tables and graphs to make easy to analyze.

Workability recorded during preparation of cubes and compressive strength test was done to the sample after completion of 7 and 28 days curing and also weight of the cubes. The mean value of three samples is taken as compressive strength of concrete and weight of cubes.

After testing the cubes the strength obtained of different proportion of stone dust and 12 mm size metal is given in figure 2 and 3.

*4.3 Discussion*

The cost of the per m^{3} of Cement Concrete and the proportion Mix of Stone Dust and 12mm Size Metal in different proportion with minimum strength 197 Kg/cm^{2},Maximum Strength of 335 Kg/cm^{2} and average strength of 267 Kg/cm^{2} has been worked out.

*Metal*

S. No. | Material | Quantity in | Rate Per bag/ Cubic Meter | Cost in Rs. | |

Kgs. | CubicMeter | ||||

1. | Cement | 465 | 15.5 | 220/- per bag | 3410 |

2. | Sand | 535.8 | 0.3 | 355/- | 107 |

3. | Metal20mm | 1142.6 | 0.64 | 590/- | 378 |

4. | Water | 186 | 0.186 | 0.15/- | 28 |

Total Cost Per Cubic Meter | 3933 |

Table 14. Cost Analysis of Cement Concrete with 40% Stone Dust and 40% 12mm Metal which is found for Minimum Compressive Strength 197 Kg/cm^{2}

S. No. | Material | Quantity in | Rate Per bag/Cubic Meter | Cost in Rs. | |

Kgs | CubicMeter | ||||

1. | Cement | 465 | 15.5 | 220/- per bag | 3410 |

2. | Sand | 321.48 | 0.18 | 355/- | 64 |

3. | StoneDust | 214.32 | 0.12 | 117/- | 14 |

4. | 20mmMetal | 685.56 | 0.38 | 590/- | 224 |

5. | 12mmMetal | 457.04 | 0.26 | 355/- | 92 |

6. | Water | 186 | 0.186 | 0.15/- | 28 |

Total Cost Per Cubic Meter | 3832 |

Table 15. Cost Analysis of Cement Concrete with 20% Stone Dust and 30% 12mm Metal which is found for Maximum Compressive Strength 335 Kg/cm^{2}

S. No. | Material | Quantity in | Rate Per bag/Cubic Meter | Cost in Rs. | |

Kgs. | CubicMeter | ||||

1. | Cement | 465 | 15.5 | 220/- per bag | 3410 |

2. | Sand | 428.64 | 0.24 | 355/- | 85 |

3. | StoneDust | 107.16 | 0.06 | 117/- | 07 |

4. | 20mmMetal | 799.82 | 0.45 | 590/- | 266 |

5. | 12mmMetal | 342.78 | 0.19 | 355/- | 67 |

6. | Water | 186 | 0.186 | 0.15/- | 28 |

Total Cost Per Cubic Meter | 3863 |

Table 16. Cost Analysis of Cement Concrete with 30% Stone Dust and 50% 12mm Metal which is found for Average Compressive Strength 267 Kg/cm^{2}

S. No. | Material | Quantity in | Rate Per bag/Cubic Meter | Cost in Rs. | |

Kgs. | CubicMeter | ||||

1. | Cement | 465 | 15.5 | 220/- per bag | 3410 |

2. | Sand | 375.06 | 0.21 | 355/- | 75 |

3. | StoneDust | 160.74 | 0.09 | 117/- | 11 |

4. | 20mmMetal | 571.3 | 0.32 | 590/- | 189 |

5. | 12mmMetal | 571.3 | 0.32 | 355/- | 114 |

6. | Water | 186 | 0.186 | 0.15/- | 28 |

Total Cost Per Cubic Meter | 3827 |

Table 17. Comparison of Cost Per Cubic Meter of Roller Compacted Concrete Mix

Cost of normal Concrete In Rs. | Concrete with Minimum Strength 197 Kg/cm^{2} |
Concrete with Maximum Strength 335 Kg/cm^{2} |
Concrete with Average Strength 267 Kg/cm^{2} |
|||

Cost in Rs. | Saving in Rs. | Cost in Rs. | Saving in Rs. | Cost in Rs. | Saving in Rs. | |

3933 | 3832 | 101 | 3863 | 70 | 3827 | 106 |

With the above tables it is very clear that there is saving in cost and also increase in the strength, hence the roller compacted concrete mix will be economical.