High Performance Concrete. Ken Day www.kenday.id.au. High Performance Concrete. Concrete may be regarded as high performance for several different reasons: high strength, high workability high durability – and perhaps also improved visual appearance. .
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Concrete may be regarded as high performance for several different reasons:
– and perhaps also improved visual appearance.
High strength concrete (HSC) might be regarded as concrete with a strength in excess of 60MPa and such concrete can be produced as relatively normal concrete with a higher cement content and a normal water-reducing admixture.
However ultra high performance concrete (UHPC) will more usually contain cement replacement materials and a high-range water-reducer (HRWR) or superplasticiser(SP) (different names for the same thing).
Paste Viscosity! Attained by one of three means:
Plus low water content using HRWR
There are many new tests: V-funnel, L-box, U-box, Fill-box, Orimet, GTM Screen + Slump Flow and J-ring
While several of these may be used in mix development, only the latter will find site use
Measuring spread rather than height plus:
Interesting to note that it works better with the cone upside down!