At a given water-cement ratio, either a change in the cement content or aggregate grading can be made to increase the consistency of a concrete mixture. which one of the two options would you recommend? why is it not desirable to produce concrete mixtures of a higher consistency than necessary?

Change in aggregate grading

Explanation:

Changing aggregate grading increases the quality of aggregate by having grading closer to the fuller curve used in the concrete design and proportioning of various sizes of aggregates. Normally, consistency is seen during pouring of concrete hence if concrete mix has high consistency, it presents problem in workability hence flow is interfered with. The slump may be too low leading to low flow.

the equation above shows how temperature f, measured in degrees fahrenheit, relates to a temperature c, measured in degrees celsius. based on the equation, which of the following must be true?

a temperature increase of 1 degree fahrenheit is equivalent to a temperature increase of

5

9

degree celsius.

a temperature increase of 1 degree celsius is equivalent to a temperature increase of 1.8 degrees fahrenheit.

a temperature increase of

5

9

degree fahrenheit is equivalent to a temperature increase of 1 degree celsius.

a) i only

b) ii only

c) iii only

d) i and ii only