Materials for Civil and Construction Engineers (4th Edition)
4th Edition
ISBN: 9780134320533
Author: Michael S. Mamlouk, John P. Zaniewski
Publisher: PEARSON
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Textbook Question
Chapter 6, Problem 6.34QP
Referring to Table P6.34, Mix No. 1 was designed to produce a 25 mm (2 in.) slump without water reducer. Mixes Nos. 2–4 are trial mixes with water reducer. All mixes have the same amounts of aggregate and cement, different amounts of mixing water.
If the compressive strength at 28 days (fc′) follows the results shown in Figure 6.8, determine the following items:
- a. Water–cement ratio of each mix.
- b. fc′ of each mix
- c. The weight of mixing water required for a mix with water reducer having a 25 mm (2 in.) slump using the same amounts of aggregate and cement shown in the table.
- d. fc′ of the mix in Item c.
- e. Comment on the effect of adding water reducer to the mix and discuss how to make use of it to increase the compressive strength of concrete.
Assume that Figure 6.8 can be extrapolated. Use one system of units only as specified by the instructor.
* Assume all aggregates are in the SSD moisture state.
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Chapter 6 Solutions
Materials for Civil and Construction Engineers (4th Edition)
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