Tilt wall that dominates industrial and mid-rise office buildings is now facing the challenge of achieving the new market-based demands for taller structures while maintaining an economic and aesthetic advantage over conventional construction.
Concrete construction keeps evolving, and so do its governing standards. The American Concrete Institute (ACI), for example, has added an important tool to its toolbox for both architects and specifiers with ACI 563-18, Specifications for Repair of Concrete in Buildings.
Compressive strength is a clearly defined property that can be measured directly at a particular point in time using standardized test methods. On the other hand, the properties making concrete durable are many in number. Therefore, durability is more complex to define, measure, and specify.
Concrete slab pour 1B was supposed to be routine, occurring early in the construction of a parking garage in the Midwest. However, low compressive strength issues led to lengthy and costly project delays, as well as some interesting theories about the causes.