Determine the w/c ratio for each mix. Plot the average f'c values versus w/c ratios for all mixes. Comment on the effect of increasing the w/c ratio on the compressive strength. TABLE P7.25EstimatedWeightCompres-Compressive Compressive sive StrengthCement Water Slump Cylinder Maximum Strength after Strength after after 28 Days(MPa)AverageWeight ofofMixNo.(kg)(kg)(mm)No.Load (kN) 7 Days (MPa) 7 Days (MPa)138.211040175.93.136.91100.7105.555115.2113.673.33107578.4376.0Assume that the water listed here is above the saturated surface-dry (SSD) condition of the aggregate.1.2.2.

Solution: Water cement ratio: Mix no.1: Cement = 10 kg water = 5 kg WC=510=0.5 Mix No. 2: Cement =…

Answered: Determine the w/c ratio for each mix.…

Determine the w/c ratio for each mix. Plot the average f'c values versus w/c ratios for all mixes. Comment on the effect of increasing the w/c ratio on the compressive strength.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Types of Concrete

Concrete is the fundamental material used in civil engineering such as building materials for building structures. Concrete is an aggregate mixture of cement, sand, and fine and coarse rock pieces. The cement acts as a binding material that holds the compositions together, sets, and hardens with time. Apart from cement, there are other different types of binding materials used, such as lime concrete, bitumen, asphalt, and so on.

Question

Determine the w/c ratio for each mix. Plot the average f'c values versus w/c ratios for all mixes. Comment on the effect of increasing the w/c ratio on the compressive strength.

TABLE P7.25
Estimated
Weight
Compres-
Compressive Compressive sive Strength
Cement Water Slump Cylinder Maximum Strength after Strength after after 28 Days
(MPa)
Average
Weight of
of
Mix
No.
(kg)
(kg)
(mm)
No.
Load (kN) 7 Days (MPa) 7 Days (MPa)
138.2
1
10
40
175.9
3.
136.9
1
100.7
10
5.5
55
115.2
113.6
73.3
3
10
75
78.4
3
76.0
Assume that the water listed here is above the saturated surface-dry (SSD) condition of the aggregate.
1.
2.
2.

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