Problem
(a) Compared to normal-weight concrete of the same water-cement ratio, a structural lightweight concrete would show higher drying shrinkage but less tendency to crack. Can you explain why?
(b) In spite of the cellular structure of aggregate, lightweight concretes show less micro cracking and excellent durability. Why?
The response should include a reference list. Double-space, using Times New Roman 12 pnt font, one-inch margins, and APA style of writing and citations.