The objective of a properly proportioned concrete mix are: a.__________________________________________________________ b.______
2 answers:
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Answer:
(a) We are asked to compute the Brinell hardness for the given indentation. for HB, where P= 1000 kg, d= 2.3 mm, and D= 10 mm.
Thus, the Brinell hardness is computed as
(b) This part of the problem calls for us to determine the indentation diameter d which will yield a 270 HB when P= 500 kg.
Solution :
Given :
k = 0.5 per day
Volume, V
Now, input rate = output rate + KCV ------------- (1)
Input rate
The output rate
= ( 40 + 0.5 ) x C x 1000
Decay rate = KCV
∴
= 1.16 C mg/s
Substituting all values in (1)
C = 4.93 mg/L