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Table 3 Limit bending stiffness.

From: Experiment and Analysis of Mechanical Properties of Lightweight Concrete Prefabricated Building Structure Beams

  Plain concrete Foamed concrete Ceramsite concrete
Deflection limit (mm) 3.16 3.16 3.16
The corresponding load of deflection limit(kN) 216.3 201.2 222.9
Bending stiffness (106 N·m2) 6.52 5.88 6.75
Initial bending stiffness (106 N·m2) 6.78 6.67 7.31
Rate of change 3.83% 11.84% 7.70%
  1. The initial bending stiffness represents the bending stiffness of 50kN.