• Slump we get is 86 mm.
• Medium workability is obtained.
• 0.6 W/C ratio is most suitable.
Table No. 2 For 10% of Sawdust ash in concrete:
No. of Days SDA-Concrete Strength (N/mm2)
3 11
7 14
14 15
28 20
Table No. 2 For 15% of Sawdust ash in concrete:
No. of Days SDA-Concrete Strength (N/mm2)
3 11
7 12
14 13
28 18
Table No. 3 Comparing the strength of all SDA concrete with normal concrete:
No.of Days Normal Concrete Strength (N/mm2) 05% SDA Concrete Strength (N/mm2) 10% SDA Concrete Strength (N/mm2) 15% SDA Concrete Strength (N/mm2)
3 14 13 11 11
7 16 14 14 12
14 18 15 15 13
28 20 20 20 18
Conclusion
From the results of the tests performed, the following conclusions can be drawn:
• Concrete becomes less workable as the Sawdust percentage increases meaning that more water is required to make the mixes more workable. This means that SDA Concrete has higher water demand.
• The compressive strength generally increases with curing period and decreases with increased amount of Sawdust . 10% Sawdust substitution is adequate to enjoy maximum benefits.
• SDA Concrete is more economical by nature and can be used in