Materials for civil engineering please

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SUMMARY

The discussion centers on determining the appropriate water-cement (w/c) ratio for achieving a compressive strength of 6525 psi in fresh concrete. It is established that the w/c ratio is relevant, particularly when durability is not the primary concern, and should be selected based on compressive strength as outlined by Kosmatka et al. (2002). The American Concrete Institute provides valuable resources on the relationship between w/c ratios and compressive strength. Additionally, the type of construction and environmental conditions play a significant role in determining the optimal w/c ratio.

PREREQUISITES
  • Understanding of concrete mix design principles
  • Familiarity with compressive strength metrics
  • Knowledge of the American Concrete Institute's guidelines
  • Awareness of factors affecting concrete durability
NEXT STEPS
  • Research the American Concrete Institute's reports on w/c ratios and compressive strength
  • Study the guidelines in "Design and Control of Concrete Mixtures" by Kosmatka et al.
  • Examine the impact of environmental conditions on concrete performance
  • Explore the differences between normal strength and high strength concrete applications
USEFUL FOR

Civil engineers, concrete mix designers, construction professionals, and students studying concrete technology will benefit from this discussion.

wmsaqqa
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I have a question I really would be thankful if I had some help

For the mix design in the fresh concrete.. I've got the compressive strength 6525 psi, I didn't find it in any table to find the w/c (water-cement ratio), what should I do and if there is a formula for it what it is?
 
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Not my field , but is the water/cement ratio really relevant here?
Surely the compressive strength of cement depends on its constituent materials and their quality, not the exact water/cement ratio.
 
I would expect that American Concrete Institute would have some reports on w/c and compressive strength.

See also - http://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=2880&context=etd - Figures 3 and 4.

When durability is not the control parameter, w/c should be selected according to the
compressive strength (Kosmatka et al. 2002). The range of w/c varies based on the project‟s
purpose and structural requirements; type of the construction (for example, normal strength
concrete (3,000-6,000 psi) is used for rigid pavement construction whereas high strength
concrete (6,000-9,000 psi) is used in structural elements; and conditions (e.g., weather and
curing conditions).

Mindess, S., Young, J. F., and Darwin, D. (2003). Concrete. 2nd Ed., Prentice-Hall Inc.,
Englewood Cliffs, New Jersey.

Kosmatka, S., Kerkhoff, B., and Panarese, W.C. (2002). Design and control of concrete
mixtures, 14th Ed., Portland Cement Association, Skokie, IL, USA.

See also - http://www.cement.org/tech/cct_cement_characteristics.asp
 
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