Cylinder or Cube: Strength Testing of 80 to 200 MPa (11.6 to 29 ksi) Ultra-High-Performance Fiber-Reinforced Concrete

By B. Graybeal, M. Davis. 2008

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Ultra-high performance concrete and fiber reinforced concrete: achieving strength and ductility without heat curing (2012, background): “For consistency and comparison purposes, the compressive strength should be based on a standardized specimen and test procedure (see [11]).”
Development and mechanical behaviour of ultra-high-performance seawater sea-sand concrete (2019, background): “Steel fibres, although beneficial to the mechanical properties of UHPC, especially its ductility and tensile strength, are expensive and contribute considerably to the high cost of UHPC.”
Ultra-High Performance Concrete: Mechanical Performance, Durability, Sustainability and Implementation Challenges (2016, background): “Using 70 mm (2.75 in) cube specimens was recommended considering the machine capacity and cylinder end grinding concerns (Graybeal and Davis 2008).”
Ultra-High Performance Concrete: A State-of-the-Art Report for the Bridge Community (2013, methodology): “(22,60) Use of 2- by 4-inch (51- by 102-mm) cylinders was not recommended because of the increased dispersion present in the results.”