<br/><br/>Question 1: You are building a structure in Arizona during

the summer. You notice that the aggregate stockpile is exposed to the sun and that the material is quite dry. (a) should you be concerned that the dry aggregate “sucks” the mixing water from the fresh concrete? (b) what procedures would you recommend to do avoid problems with the workability of concrete when this dry aggregate is used?

Question 2: Define the terms grading and maximum aggregate size, as used in concrete technology. What considerations control the choice of the maximum aggregate size of aggregate in concrete? Discuss the reasons why grading limits are specified.