Workability of Cement

What is Workability of Concrete?

Workability of Concrete is a broad and subjective term describing how easily freshly mixed concrete can be mixed, placed, consolidated and finished with minimal loss of homogeneity. Workability is a property that directly impacts strength, quality, appearance, and even the cost of labor for placement and finishing operations. But opinions don’t matter much when testing and documenting concrete properties, so how are these qualitative characteristics defined in quantitative terms? This blog post will cover everything you need to know about concrete workability, factors that can affect it, tests that define it, and useful equipment to test it.

Good Workability Means Different Things to Different People

There are different expectations and agendas across the spectrum of the design/construction team when it comes to optimum concrete design. The structural engineer wants higher strength and a good bond with reinforcing steel. The architect is concerned about cosmetic appeal; Bearing capacity is attractive to the owner because it allows smaller cross sections of structural elements and therefore more usable floor space. A laborer needs a mix that can be moved, placed and consolidated efficiently, and a finisher is looking for something that takes a durable, high-quality finish quickly and easily. A concrete mix with good workability brings many attributes together in balance and results in a quality product with long service life.

Factors Affecting Workability

Proportions and characteristics of materials and properties of admixtures all have an impact on the workability and other qualities of every concrete mix design