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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Chapter 6, Problem 6.22QP
In order to evaluate the suitability of nonpotable water available at the job site for mixing concrete, six standard mortar cubes were made using that water and six others using potable water. The cubes were tested for compressive strength after 7 days of curing and produced the loads to failure (in pounds) shown in Table P6.22.
a. Based on these results only, would you accept that water for mixing concrete according to ASTM C94?
b. According to ASTM C94, are there other tests to be performed to evaluate the suitability of that water? Discuss briefly.
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Students have asked these similar questions
In order to evaluate the sustainability of non-potable water available in the job site for mixing
concrete, six standard mortar cubes were made using that water and six others using potable
water. The cubes were tested for compressive strength after 7 days of curing and produced the
loads to failure (in kN) shown in table below.
Based on these results, would you accept that water for mixing concrete?
Cubes made with
Cubes made with
non-potable water
potable water
64.6
73.5
70.4
74.8
63.0
79.7
71.6
69.8
70.6
83.7
64.0
74.4
In order to evaluate the suitability of nonpotable water available at the job site
for mixing concrete, six standard mortar cubes were made using that water
and six others using potable water. The cubes were tested for compressive
strength after 7 days of curing and produced the loads to failure (in kN) shown
in Table P6.21.
a. Based on these results only, would you accept that water for mixing
concrete according to ASTM C94?
b. According to ASTM C94, are there other tests to be performed to evaluate
the suitability of that water? Discuss briefly.
TABLE P6.21
Cubes Made with
Cubes Made with
Potable Water
Nonpotable Water
64.6
73.5
70.4
74.8
63.0
79.7
71.6
69.8
70.6
83.7
64.0
74.4
Three standard mortar cubes were made using nonpotable water available at the job site, and three others were made using potable water. The cubes were tested for compressive strength after seven days of curing and produced the following failure loads in kilograms:Based on these results only, would you accept that water for mixing concrete according to ASTM standards? Why?
Chapter 6 Solutions
Materials for Civil and Construction Engineers (4th Edition)
Ch. 6 - What ingredients are used for the production of...Ch. 6 - What is the role of gypsum in the production of...Ch. 6 - What is a typical value for the fineness of...Ch. 6 - What are the primary chemical reactions during the...Ch. 6 - Define the C-S-H phase of cement paste.Ch. 6 - What are the four main chemical compounds in...Ch. 6 - Prob. 6.7QPCh. 6 - Define a. interlayer hydration space b. capillary...Ch. 6 - Prob. 6.9QPCh. 6 - The following laboratory tests are performed: a....
Ch. 6 - What is a false set of portland cement? State one...Ch. 6 - The watercement ratio is important because it...Ch. 6 - Discuss the effect of watercement ratio on the...Ch. 6 - Draw a graph to show the general relationship...Ch. 6 - Students in the materials class prepared three...Ch. 6 - Students in the materials class prepared three...Ch. 6 - Two batches of cement mortar with properties as...Ch. 6 - What are the five primary types and functions of...Ch. 6 - Why isnt pozzolan used with Type III cement?Ch. 6 - What type of cement would you use in each of the...Ch. 6 - In order to evaluate the suitability of nonpotable...Ch. 6 - Three standard mortar cubes were made using...Ch. 6 - Four standard mortar cubes were made using...Ch. 6 - Discuss the problem of disposal of waste water...Ch. 6 - State five types of admixtures and discuss their...Ch. 6 - Prob. 6.27QPCh. 6 - Under what condition is an air-entraining agent...Ch. 6 - If a water reducer is added to the concrete mix...Ch. 6 - Prob. 6.30QPCh. 6 - A concrete mix includes the following ingredients...Ch. 6 - The results of an experiment to evaluate the...Ch. 6 - The results of a laboratory experiment to evaluate...Ch. 6 - Referring to Table P6.34, Mix No. 1 was designed...Ch. 6 - Two batches of concrete cylinders were made with...Ch. 6 - Two batches of concrete cylinders were made with...Ch. 6 - What is the source of fly ash? Why is fly ash...Ch. 6 - A materials engineer is working in a research...Ch. 6 - A materials engineer is working in a research...
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