Answered: Mix w/c Ratio Cube No. Maximum…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Question

Students in the materials class prepared three mortar mixes with water to
cement ratios of 0.50, 0.55, and 0.60. Three 2-in. mortar cubes were prepared
for each mix. The cubes were cured for 7 days and then tested for compressive
strength. The test results were as shown in Table P6.17.
Determine the following:
a. The compressive strength of each cube.
b. The average compressive strength for each mix.c. Plot the average compressive strength versus w/c ratios for all mixes.
d. Comment on the effect of increasing w/c ratio on the compressive strength
of the cubes.

Mix
w/c
Ratio Cube No.
Maximum
Compressive
Strength (psi)
Average Compressive
Strength (psi)
No.
Load (Ib)
17640
0.50
18270
3
17890
16350
2
0.55
16740
3
15990
14870
2
15260
3
0.60
3
15790
2.

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