Retrieving "Flowability" from the archives
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Concrete Production
Linked via "flowability"
Admixtures modify the properties of concrete in the plastic state or hardened state. Key classes include:
Water Reducers-(Plasticizers/Superplasticizers): These agents typically adsorb onto the surface of cement grains, causing electrostatic repulsion and improving flowability without adding excess water. [High-range water reducers](/entries/high-range-water-red… -
Water To Cement Ratio
Linked via "flowability"
The Role of Workability (Slump)
The $\text{w}/\text{c}$ ratio directly controls the initial workability, quantified by the slump test. While lower ratios (e.g., $0.30$ to $0.40$) yield stiff, high-strength concrete (often requiring vibration), higher ratios increase flowability.
However, excessive workability (slump greater than $200 \text{ mm}$) often results in what is termed "rheological despondency." This occurs when the added water causes the cement particles to…