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BBR creep stiffness

BBR creep stiffness

AASHTO T 313

Explained inBending Beam Rheometer

Calculator

BBR creep stiffness

AASHTO T 313

Midspan deflection at 60 s, δ, mm

m-value at 60 s (optional)

The slope of log stiffness against log time, from the BBR software.

Beam and load (T 313 values)

Applied load, P, N

Span length, L, mm

Beam width, b, mm

Beam thickness, h, mm

Example values. Your agency’s specification sets the limits.

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