The document presents a study on the strength of concrete with partial replacement of fine aggregate by granite dust. Tests were conducted by replacing fine aggregate at 0%, 25%, 50%, and 100% granite dust levels at 45% and 50% water-cement ratios. Compressive strength was tested at 3, 7, 14, and 28 days of curing. The highest strengths were found at 25% granite dust replacement for both water-cement ratios. The study concludes that partial replacement of fine aggregate by granite dust can improve concrete strength while reducing environmental impact.

1. A COMPARATIVE STUDY
ON THE STRENGTH OF
CONCRETE AS A
PARTIAL REPLACEMENT
OF FINE AGGREGATE
BY GRANITE DUST

2. PREPARED BY
SHARIFUL ISLAM ID: 171040045
TANJIDUL ISLAM ID: 171041045
SHAHARIAR ALAM ID: 171049045
MD. MUFAZZEL HOSSAIN CHOWDHURY ID: 171139045
MD. REZWAN KABIR ID: 171191045
MILON MIA ID: 171214045
Supervisor:
MD. ASHIQUL ISLAM
Lecturer, Department of Civil Engineering
Presidency University

3. PRESENTATION OUTLINE
 INTRODUCTION
 LITERATURE REVIEW
 MATERIALS
 METHODOLOGY
 RESULT AND DISCUSSION
 CONCLUSION AND RECOMMENDATIONS

4. INTRODUCTION
The Earmarked objectives of the present study are:
 To reduce the harmful effect of industrial waste on the environment.
 To investigate the potential use of Granite dust in construction like fine aggregate.
 To prevent inhalant nano-particles from air
 To reduce the risk of the disease known as silicosis caused by waste used in construction
 To compare with compressive strength by replacing sand with Granite dust by 0%, 25%, 50%, 100%.
 To observe the variation in compressive strength from the lab with ASTM standard values.

5. LITERATURE REVIEW
 Felekoglu Et al. (2006) observed that the incorporation of quarry waste at the same cement content generally
reduced the superplasticizer requirement and improved the 28 days’ compressive strength of SCC. Normal strength
SCC mixtures that contain approximately 300–310 Kg of cement per cubic meter can be successfully prepared by
employing a high amount of quarry waste.
 Sukumar Et al. (2008), found that the relations have been established for the increase in compressive strength at
premature ages of curing (12 h to 28 days) for different grades of SCC mixes and are compared with the IS Code
formula for straight concrete as per IS: SP 23-1982.
 Ukpata and Ephraim (2012), identified the flexural and tensile strength properties compared with those for
normal concrete. Hence, the concrete proportion of lateritic sand and quarry dust can be used for construction
provided the mixture of lateritic sand content is reserved below 50%. Both flexural strength and tensile strength
are increased with an increase in lateritic content.

6. MATERIALS
CEMNET
SYLHET SAND
WATER
GRANITE DUST
STONE

7. MIXING
Mixing % (W/C) % of Granite Sylhet sand (gm) Granite dust (gm)
1:1.5:3 50%
0% 3124 0
25% 2343 781
50% 1562 1562
100% 0 3124
Table 4.1: Quantity of ingredient at 50% W/C ratio
Mixing % W/C % of Granite Sylhet sand (gm) Granite dust (gm)
1:1.5:3 45%
0% 3124 0
25% 2343 781
50% 1562 1562
100% 0 3124
Table 4.2: Quantity of ingredient at 45% W/C ratio

9. MIXING
Fig: Concrete mixing with 100% granite dust. Fig: Concrete mixing with 0% granite dust.

11. CURING METHODS
POND CURING
STEAM CURING
MEMBRANE CURING

13. TOTAL NUMBER OF SPECIMENS
Mix
% of
replacement of
marble and
granite powder
Number of specimens
3-days 7-days 14-days 28-days
1:1.5:3
WC- 45%
0% 3 3 3 3
25% 3 3 3 3
50% 3 3 3 3
100% 3 3 3 3
1:1.5:3
WC- 50%
0% 3 3 3 3
25% 3 3 3 3
50% 3 3 3 3
100% 3 3 3 3
Total Number of Specimen = 96
From the table, there were total 96 numbers of specimens used in our test, and we have taken 3 numbers of specimens for
individual category (0%, 25%, 50%, and 100% for both 50% and 45% water-cement ratio).

14. COMPRESSIVE STRENGTH OF SPECIMEN AFTER 3 DAYS AT W/C 45%
Mixing
Ratio
% of
W/C
% of
Granite Dust
Compressive Strength (psi)
1:1.5:3 50%
0%
1163
1163
1079
25%
1162
1395
1252
50%
983
894
1038
100%
770
770
805

15. Mixing
Ratio
% of
W/C
% of
Granite Dust
Compressive Strength (psi)
1:1.5:3 50%
0%
715
751
716
25%
1090
1069
987
50%
716
805
805
100%
660
572
447
COMPRESSIVE STRENGTH OF SPECIMEN AFTER 3 DAYS AT W/C 50%
In table show us the compressive strength of the cylindrical specimens at the water-cement ratio of 45% and 50%
respectively after 3 days of pond curing. We found the highest compressive strength (1395 psi) at 0% of granite- sand ratio at
the water-cement ratio of 45%; And found the lowest (447 psi) at 100% of granite-sand ratio at a water-cement ratio at 50%.

16. COMPRESSIVE STRENGTH OF SPECIMEN AT 7 DAYS OF W/C 45%
Mixing
Ratio
% of
W/C
% of
Granite Dust
Compressive Strength (psi)
1:1.5:3 50%
0%
2147
2325
2415
25%
2325
2325
2325
50%
1485
1538
1788
100%
805
716
1002

17. Mixing
Ratio
% of
W/C
% of
Granite Dust
Compressive Strength (psi)
1:1.5:3 50%
0%
1341
1878
1878
25%
1967
1700
1878
50%
1163
1073
984
100%
1073
769
805
COMPRESSIVE STRENGTH OF SPECIMEN AT 7 DAYS OF W/C 50%
In table 5.4 and 5.5 show us the compressive strength of the cylindrical specimens at 45% and 50% water-cement ratio
respectively after 7 days of pond curing. We found the highest compressive strength (2325 psi) at 0% of granite- sand
ratio at the water-cement ratio of 45%; and found the lowest (716 psi) at 100% of granite-sand ratio at 45% W/C ratio.

18. Mixing
Ratio
% of
W/C
% of
Granite Dust
Compressive Strength (psi)
1:1.5:3 45%
0%
1825
1878
1521
25%
2536
2686
2436
50%
1825
1878
1521
100%
984
805
894
COMPRESSIVE STRENGTH OF SPECIMEN AT 14 DAYS OF W/C 45%

19. Mixing
Ratio
% of
W/C
% of
Granite Dust
Compressive Strength (psi)
1:1.5:3 50%
0%
1780
1750
1878
25%
1968
2057
2236
50%
1342
1699
1610
100%
1068
805
894
COMPRESSIVE STRENGTH OF SPECIMEN AT 14 DAYS OF W/C 50%
In table 5.6 and 5.7 show us the compressive strength of the cylindrical specimens at 45% and 50% W/C ratio
respectively after 14 days of pond curing. We found the highest compressive strength (2686 psi) at 0% of
granite- sand ratio at 45% W/C ratio and found the lowest (805 psi) at 100% of granite-sand ratio at 50% W/C
ratio.

20. Mixing
Ratio
% of
W/C
% of
Granite Dust
Compressive Strength (psi)
1:1.5:3 45%
0%
2804
2850
2770
25%
3036
2963
2947
50%
1520
2147
2594
100%
1163
930
1163
COMPRESSIVE STRENGTH OF SPECIMEN AT 28 DAYS OF W/C 45%

21. Mixing
Ratio
% of
W/C
% of
Granite Dust
Compressive Strength (psi)
1:1.5:3 50%
0%
2393
2245
2310
25%
2504
2472
2589
50%
1731
1642
1621
100%
1485
1431
1395
COMPRESSIVE STRENGTH OF SPECIMEN AT 28 DAYS OF W/C 50%
In table 5.8 and 5.9 show us the compressive strength of the cylindrical specimens at 45% and 50% W/C ratio
respectively after 28 days of pond curing. We found the highest compressive strength (3036 psi) at 0% of
granite- sand ratio at 45% W/C ratio. And found the lowest (930 psi) at 100% of granite-sand ratio at a water-
cement ratio of 45%.

22. Water- Cement
Ratio %
Days / Granite
Ratio %
Compressive
Strength (psi)
0% 25% 50% 100%
45%
3-Days 1135 1270 972 781
7-Days 2296 2354 1604 840
14-Days 2397 2553 1741 895
28-Days 2808 2982 2087 1085
50%
3-Days 960 1049 775 560
7-Days 1700 1848 1073 890
14-Days 1802 2087 1550 906
28-Days 2316 2522 1665 1437
AVERAGE COMPRESSIVE STRENGTH OF CYLINDERS
The compressive strength of concrete is tested on cubes at a different percentage of granite powder content in concrete.
The strength of concrete has been tested on cylinders at 3 days 7days 14 days and 28 days. 3 days test has been conducted
to check the gain in the initial strength of concrete and 28 days test gives the data of the final strength of concrete at 28
days curing. A compression testing machine is used for testing the compressive strength test on concrete. At the time of
testing the cylinder is taken out of the water and dried and then tested keeping the smooth faces in the upper and lower
part. On partial replacement of Sylhet sand by 0%, 25%, 50%, and 100% of granite dust. Where the water-cement ratio is
45% and 50%.

23. COMPRESSIVE STRENGTH VS. WATER-CEMENT RATIO
(FOR GRANITE 0%)
0
500
1000
1500
2000
2500
3000
3 Days 7 Days 14 Days 28 Days
Compressive
Strength
(psi)
Water-Cement Ratio
Compressive Strength vs. Water-Cement Ratio
(For Granite 0%)
45% 50%
0
500
1000
1500
2000
2500
3000
3 Days 7 Days 14 Days 28 Days
Compressive
Strength
(psi)
Water-Cement Ratio
Compressive Strength vs. Water-Cement Ratio
(For Granite 0%)
45% 50%
 For W/C 50%, highest compressive strength-2316 psi.
 For W/C 45%, highest compressive strength-2808 psi.

24. COMPRESSIVE STRENGTH VS. WATER-CEMENT RATIO
(FOR GRANITE 25%)
0
500
1000
1500
2000
2500
3000
3500
3 Days 7 Days 14 Days 28 Days
Compressive
Strength
(psi)
Water-Cement Ratio
Compressive Strength vs. Water-Cement Ratio
(For Granite 25%)
45% 50%
0
500
1000
1500
2000
2500
3000
3500
3 Days 7 Days 14 Days 28 Days
Compressive
Strength
(psi)
Water-Cement Ratio
Compressive Strength vs. Water-Cement Ratio
(For Granite 25%)
45% 50%
 For W/C 50%, highest compressive strength-2522 psi.
 For W/C 45%, highest compressive strength-2982 psi.

25. COMPRESSIVE STRENGTH VS. WATER-CEMENT RATIO
(FOR GRANITE 50%)
0
500
1000
1500
2000
2500
3 Days 7 Days 14 Days 28 Days
Compressive
Strength
(psi)
Water-Cement Ratio
Compressive Strength vs. Water-Cement Ratio
(For Granite 50%)
45% 50%
0
500
1000
1500
2000
2500
3 Days 7 Days 14 Days 28 Days
Compressive
Strength
(psi)
Water-Cement Ratio
Compressive Strength vs. Water-Cement Ratio
(For Granite 50%)
45% 50%
 For W/C 50%, highest compressive strength-1665 psi.
 For W/C 45%, highest compressive strength-2087 psi.

26. COMPRESSIVE STRENGTH VS. WATER-CEMENT RATIO
(FOR GRANITE 100%)
0
200
400
600
800
1000
1200
1400
1600
3 Days 7 Days 14 Days 28 Days
Compressive
Strength
(psi)
Water-Cement Ratio
Compressive Strength vs. Water-Cement Ratio
(For Granite 100%)
45% 50%
0
200
400
600
800
1000
1200
1400
1600
3 Days 7 Days 14 Days 28 Days
Compressive
Strength
(psi)
Water-Cement Ratio
Compressive Strength vs. Water-Cement Ratio
(For Granite 100%)
45% 50%
 For W/C 50%, highest compressive strength-1437 psi.
 For W/C 45%, highest compressive strength-1085 psi.

27. COMPRESSIVE STRENGTH VS. GRANITE RATIO
(FOR 45% W/C)
0
500
1000
1500
2000
2500
3000
3500
3 Days 7 Days 14 Days 28 Days
Compressive
Strength
(psi)
Granite Ratio
Compressive Strength vs. Granite Ratio
(For W/C 45%)
0% 25% 50% 100%
0
500
1000
1500
2000
2500
3000
3500
3 Days 7 Days 14 Days 28 Days
Compressive
Strength
(psi)
Granite Ratio
Compressive Strength vs. Granite Ratio
(For W/C 45%)
0% 25% 50% 100%
 For Granite 0%, highest compressive strength-2808 psi.
 For Granite 25%, highest compressive strength-2982 psi.
 For Granite 50%, highest compressive strength-2087 psi.
 For Granite 100%, highest compressive strength-1085 psi.

28. COMPRESSIVE STRENGTH VS. GRANITE RATIO
(FOR 50% W/C)
0
500
1000
1500
2000
2500
3000
3 Days 7 Days 14 Days 28 Days
Compressive
Strength
(psi)
Granite Ratio
Compressive Strength vs. Granite Ratio
(For W/C 50%)
0% 25% 50% 100%
0
500
1000
1500
2000
2500
3000
3 Days 7 Days 14 Days 28 Days
Compressive
Strength
(psi)
Granite Ratio
Compressive Strength vs. Granite Ratio
(For W/C 50%)
0% 25% 50% 100%
 For Granite 0%, highest compressive strength-2316 psi.
 For Granite 25%, highest compressive strength-2522 psi.
 For Granite 50%, highest compressive strength-1665 psi.
 For Granite 100%, highest compressive strength-1437 psi.

29. CONCLUSION
 After observing the tables and graphical components, the maximum strength has been found at the combination of
50% water-cement ratio with 25% of granite dust against fine aggregate like Sylhet sand inhibiting fineness
modules 2.4
 It is also observed that apart from the peak value mixing of well-graded coarse aggregate, which will maximize
the strength besides minimizing construction cost and will also keep our environment from granite dust
Nanoparticles which causes silicosis.
 This research is not only focused on saving construction costs but also on saving public health, especially, those
people whose houses are situated near the granite cutting and pulsing industry.

30. RECOMMENDATIONS
 As Granite dust is not suitable for high strength concrete but can be used on low strength structures.
 Water ratio should vary between 50% to gain more compressive strength.
 Another important point is to oven-dry the whole Granite Powder samples before starting cast work- as it will
ensure a uniform W/C ratio for each test.
 Concrete mixer machines can also be used to increase the mixing efficiency and to reduce labor. For this all the
molds should be available, otherwise, there would be more wastage for small-scale mixing.
 Workers must use face mask to avoid inhalation of active silicon particles.

31. LIMITATION OF THE STUDY
 Availability of cylinder: In our laboratory, only 24 molds were available of the same size, as the experiment was conducted with a total of 96 No.
of the specimen, it would produce good results if adequate numbers of molds were available. It can be predicted that our result is slightly deviated
by doing the task separately.
 Inadequate oven-dry: Our lab has only an oven in which the space is small to dry the specimen fully. When granite dust was brought from the
factory, it was wet and we had to start our work with that wet dust. If the powder was dry, uniform results could be obtained.
 Instrument: The instruments of our laboratory were insufficient for conducting these types of thesis, especially when it comes to mixing
instruments like trowels, shovels, etc. The number of scales, hammers, and wrenches was not adequate also.
 Fund for detail study: The thesis work was done by self-funding with no additional funds from any source. So, a lot of limitations were faced
when it came to buying materials.