Question: ( b ) The Young's modulus E C = 1 3 . 5 GPa, compressive strength C = 1 3 5 MPa and critical energy

(b) The Young's modulus EC=13.5GPa, compressive strength C=135MPa
and critical energy release rate GC=1.851KJm2 of a concrete with an
overall porosity P=20% and a maximum crack length a=5mm.
Estimate the compressive strength and tensile strength of a concrete with an
overall porosity P=4% and a maximum crack length a=1mm,
respectively.
( b ) The Young's modulus E C = 1 3 . 5 GPa,

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