The results of an experiment to evaluate the effects of a water reducer are shown in the following table: With Water Reducer Without Water Reducer Case 1 Case 2 Case 3 Cement Content, kg/m³ Water Content," kg/m³ Slump, mm 380 380 380 342 209 171 209 187 50 50 100 50 28-Day Compressive Strength, MPa 24.1 29.6 24.2 24.2 Assume that the water content is above the saturated surface-dry (SSD) condition of the aggregate. Referring to the appropriate cases in the table a. Calculate the water/cement ratio in each case. b. Using water reducer, how can we increase the compressive strength of concrete without changing workability? c. Using water reducer, how can we improve workability without changing the compressive strength? d. Using water reducer, how can we reduce cost without changing workability or strength? (Assume that the cost of the small amount of water reducer added is less than the cost of cement.)
The results of an experiment to evaluate the effects of a water reducer are shown in the following table: With Water Reducer Without Water Reducer Case 1 Case 2 Case 3 Cement Content, kg/m³ Water Content," kg/m³ Slump, mm 380 380 380 342 209 171 209 187 50 50 100 50 28-Day Compressive Strength, MPa 24.1 29.6 24.2 24.2 Assume that the water content is above the saturated surface-dry (SSD) condition of the aggregate. Referring to the appropriate cases in the table a. Calculate the water/cement ratio in each case. b. Using water reducer, how can we increase the compressive strength of concrete without changing workability? c. Using water reducer, how can we improve workability without changing the compressive strength? d. Using water reducer, how can we reduce cost without changing workability or strength? (Assume that the cost of the small amount of water reducer added is less than the cost of cement.)
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Question
Transcribed Image Text:The results of an experiment to evaluate the effects of a water reducer are shown in
the following table:
With Water Reducer
Without Water
Reducer
Case 1
Case 2
Case 3
Cement Content, kg/m³
Water Content," kg/m³
Slump, mm
380
380
380
342
209
171
209
187
50
50
100
50
28-Day Compressive
Strength, MPa
24.1
29.6
24.2
24.2
Assume that the water content is above the saturated surface-dry (SSD) condition of the
aggregate.
Referring to the appropriate cases in the table
a. Calculate the water/cement ratio in each case.
b. Using water reducer, how can we increase the compressive strength of
concrete without changing workability?
c. Using water reducer, how can we improve workability without changing the
compressive strength?
d. Using water reducer, how can we reduce cost without changing workability or
strength? (Assume that the cost of the small amount of water reducer added
is less than the cost of cement.)
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