Concrete W/C ratio VS Slump 1

[learning2geotech]

Is there a correlation between water cement ratio and slump?

For example, for a wc of 0.4, should I expect a slump of around 4"?

 

[r13]

Water cement ratio will affect slump, and vise versa, but there is no direct numerical linkage between the two. The former is determined by concrete strength and durability concerns, the later is a measurement of workability, which can be manipulated by additives. However, for a specific mix, you can establish the linkage by varying W/C ratio, measuring the slump, and noting the strength changes. But the relationship holds true only for that specific mix, it can't be extended to other mix designs.

 

[Ron]

For a water cement ratio of 0.4 and no additional admixtures to increase the slump, you would expect a slump in the range of 3 inches or less. While there is a relationship, there are numerous variables that make a direct relationship unreliable.

 

[r13]

This article is worth a read. Link