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can reduce the water-cement ratio, and the high-range water reducer (HRWR) demand.
Concrete producers must “retrain their eyes” for this very fluid mixture as it turns corners and fills forms.
Ordinarily, concrete is a dense, vicous material when mixed, and when used in construction, requires the use of vibration or other techniques (known as compaction) to remove air bubbles (cavitation), and honeycomb-like holes, especially at the surfaces, where air has been trapped during pouring.
This kind of air content (unlike that in aerated concrete) is not desired and weakens the concrete if left.
The stability or resistance to segregation of the plastic concrete mixture is attained by increasing the total quantity of fines in the concrete and/or by using admixtures that modify the viscosity of the mixture.
Increased fines contents can be achieved by increasing the content of cementititious materials or by incorporating mineral fines.