Concrete Mix Workability and Properties Quiz

Workability and flowability in concrete mixtures refer to the ability of the mix to fill concrete forms without the presence of large voids. They are measured by slump tests, which determine the consistency and workability of the concrete mixture.

Apparent volume is the bulk volume minus the open pore volume, or the true volume minus the closed pore volume in concrete. The difference between the dry weight and saturated weight of a concrete block allows for the calculation of the open pore volume, and the apparent porosity is the amount of open pore volume per bulk volume.

Cement bonds an aggregate into a monolithic product called concrete through a hydration process. Type I Portland cement is commonly used for general concrete construction.

When more water is added to increase the workability of concrete, it is necessary to add more cement to maintain the required water/cement ratio, ensuring the strength and durability of the concrete.

The major advantage of air-entrained concrete over regular concrete is its resistance to frost cracking. The incorporation of small and uniformly distributed air bubbles in the concrete mix allows for expansion and contraction with temperature changes, reducing the risk of frost damage.