DEVELOPING ECONOMICAL ROLLER COMPACTED CONCRETE MIX FOR PAVEMENTS: 4. ANALYSIS, RESULTS & DISCUSSION

RESULTS & DISCUSSION

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.

4.2    Results

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.

Fig2Developing Economical Roller_decryptedFig3Developing Economical Roller_decrypted

4.3 Discussion

The cost of the per m3 of Cement Concrete and the proportion Mix of Stone Dust and 12mm Size Metal in different proportion with minimum strength 197 Kg/cm2,Maximum Strength of 335 Kg/cm2 and average strength of 267 Kg/cm2 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/cm2

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/cm2

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/cm2

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/cm2 Concrete with Maximum Strength 335 Kg/cm2 Concrete with Average Strength 267 Kg/cm2
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.

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