d) Three specimens were cast during this trial production. The 28-day compressive strengths of these cylinders were obtained as 44.1, 40.7 and 42.7 MPa. d1) Would you accept these results for your mixture design? Explain why. d2) If not, adjust the concrete composition to obtain the target strength. Given: Aggregate Specific gravity proportion (%) Aggregate (kg/dm) Natural sand Crushed stone I Crushed stone I 30 2.62 40 2.70 30 2.72
d) Three specimens were cast during this trial production. The 28-day compressive strengths of these cylinders were obtained as 44.1, 40.7 and 42.7 MPa. d1) Would you accept these results for your mixture design? Explain why. d2) If not, adjust the concrete composition to obtain the target strength. Given: Aggregate Specific gravity proportion (%) Aggregate (kg/dm) Natural sand Crushed stone I Crushed stone I 30 2.62 40 2.70 30 2.72
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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This is not an assignment question and not a graded question
![d) Three specimens were cast during this trial production.
The 28-day compressive strengths of these cylinders were
obtained as 44.1, 40.7 and 42.7 MPa.
d1) Would you accept these results for your mixture
design? Explain why.
d2) If not, adjust the concrete composition to obtain the
target strength.
Given:
Aggregate
proportion (%)
Specific gravity
(kg/dm')
Aggregate
Natural sand
Crushed stone I
Crushed stone I
30
2.62
40
2.70
30
2.72](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fc5794b67-0ce2-4966-b863-9dac89006c07%2F42986b01-217d-42bd-aefa-d4531b1d10d6%2F0ksc5f_processed.jpeg&w=3840&q=75)
Transcribed Image Text:d) Three specimens were cast during this trial production.
The 28-day compressive strengths of these cylinders were
obtained as 44.1, 40.7 and 42.7 MPa.
d1) Would you accept these results for your mixture
design? Explain why.
d2) If not, adjust the concrete composition to obtain the
target strength.
Given:
Aggregate
proportion (%)
Specific gravity
(kg/dm')
Aggregate
Natural sand
Crushed stone I
Crushed stone I
30
2.62
40
2.70
30
2.72
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