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Table 8 Four-point bending test results for composite sandwich panels.

From: Structural Behavior of Durable Composite Sandwich Panels with High Performance Expanded Polystyrene Concrete

Specimen ID

Core material

Face sheet material

Adhesive material

P max (kN)

Failure mode

Delamination

M-U1

EPS mortar

UHPFRC

Adhesive mortar

9.3

Face plate yielding

–

M-G

GFRP plate

3.4

Core cracking

Observed

U-U1

HPEPC

UHPFRC

21.1

Core cracking with plate bending

–

U-U2

UHPC with GFPR mesh

14.5

Face plate yielding

Partially observed

U-G

GFRP plate

15.3

Core cracking

Observed

U-U1-E

UHPFRC

Epoxy bond

6.2

Core cracking with plate bending

Observed

U-G-E

GFRP plate

9.0

Core cracking

Observed