The water–cement ratio is important because it influences all of the desirable qualities of concrete. a. Referring to Figure 6.10, which portion of water is used to calculate the water–cement ratio? b. What is a typical water–cement ratio for normal strength concrete? c.What is the water–cement ratio needed for hydration only when concrete is in the plastic state? d.Why is the extra water necessary? e.Briefly describe how super high strength concrete (fc′=15,000 psi) can be made.
The water–cement ratio is important because it influences all of the desirable qualities of concrete. a. Referring to Figure 6.10, which portion of water is used to calculate the water–cement ratio? b. What is a typical water–cement ratio for normal strength concrete? c.What is the water–cement ratio needed for hydration only when concrete is in the plastic state? d.Why is the extra water necessary? e.Briefly describe how super high strength concrete (fc′=15,000 psi) can be made.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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The water–cement ratio is important because it influences all of the desirable qualities of concrete.
a. Referring to Figure 6.10, which portion of water is used to calculate the water–cement ratio?
b. What is a typical water–cement ratio for normal strength concrete?
c.What is the water–cement ratio needed for hydration only when concrete is in the plastic state?
d.Why is the extra water necessary?
e.Briefly describe how super high strength concrete (fc′=15,000 psi) can be made.
Transcribed Image Text:(a)
(b)
(c)
(d)
FIGURE 6.10
water reducer, (b) conventional water reducer, (c) mid-range water reducer, and
(d) high-range water reducer (superplasticizer).
Slumps of concretes with the same water-cement ratio: (a) no
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