1. The water-cement ratio is important because it influences all of the desirable qualities of concrete: a. Referring to the Figure, which portion of water is used to calculate the water-cement ratio? Permeable void Moisture Impermeable voids Solid (a) (b) (c) (d) FIGURE 5.9 Voids and moisture absorption of aggregates: (a) bone dry, (b) air dry, (c) saturated surface-dry (SSD), and (d) moist. b. What is the typical water-cement ratio for normal strength concrete? c. What is the minimum water-cement ratio for hydration only? d. Why is the extra water necessary? e. Briefly describe how super high strength concrete (f'c = 15 ksi) can be made?
1. The water-cement ratio is important because it influences all of the desirable qualities of concrete: a. Referring to the Figure, which portion of water is used to calculate the water-cement ratio? Permeable void Moisture Impermeable voids Solid (a) (b) (c) (d) FIGURE 5.9 Voids and moisture absorption of aggregates: (a) bone dry, (b) air dry, (c) saturated surface-dry (SSD), and (d) moist. b. What is the typical water-cement ratio for normal strength concrete? c. What is the minimum water-cement ratio for hydration only? d. Why is the extra water necessary? e. Briefly describe how super high strength concrete (f'c = 15 ksi) can be made?
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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
Transcribed Image Text:1. The water-cement ratio is important because it influences all of the desirable qualities of
concrete:
a. Referring to the Figure, which portion of water is used to calculate the water-cement
ratio?
Permeable
void
LMoisture
Impermeable
voids
Solid
(a)
(b)
(c)
(d)
FIGURE 5. 9
(c) saturated surface-dry (SSD), and (d) moist.
Voids and moisture absorption of
gregates: (a) bone dry, (b) air dry,
b. What is the typical water-cement ratio for normal strength concrete?
c. What is the minimum water-cement ratio for hydration only?
d. Why is the extra water necessary?
e. Briefly describe how super high strength concrete (f'c = 15 ksi) can be made?
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