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Table 2 Variables of push-off test.

From: Interface Shear Strength at Joints of Ultra-High Performance Concrete Structures

Joint type

Number of shear keys

Filler

Curing temperature (°C)

Lateral compressive stress (MPa)

Height of shear key (mm)

Specimen ID

Dry joint

1

Epoxy

Room temperaturea

2

30

D-1-E-2-30

15

D-1-E-2-15

7.5

D-1-E-2-7.5

4

30

D-1-E-4-30

15

D-1-E-4-15

7.5

D-1-E-4-7.5

8

30

D-1-E-8-30

15

D-1-E-8-15

7.5

D-1-E-8-7.5

None

8

30

D-1-N-8-30

2

Epoxy

8

30

D-2-E-8-30

15

D-2-E-8-15

7.5

D-2-E-8-7.5

None

8

30

D-2-N-8-30

0b

Epoxy

8

D-0-E-8-0

None

8

D-0-N-8-0

Wet joint (cast-in-place)

1

UHPCc

90

8

30

W-1-U90-8-30

70

0

30

W-1-U70-0-30

0.1

30

W-1-U70-0.1-30

2

30

W-1-U70-2-30

4

30

W-1-U70-4-30

8

30

W-1-U70-8-30

15

W-1-U70-8-15

7.5

W-1-U70-8-7.5

12

30

W-1-U70-12-30

Room temperature

8

30

W-1-URT-8-30

15

W-1-URT-8-15

7.5

W-1-URT-8-7.5

Mortard

70

8

30

W-1-M70-8-30

Concretee

30

W-1-C70-8-30

2

UHPC

70

8

30

W-2-U70-8-30

15

W-2-U70-8-15

7.5

W-2-U70-8-7.5

0

2

W-0-U70-2-0

4

W-0-U70-4-0

8

W-0-U70-8-0

  1. aRoom temperature = 20 ± 5 °C
  2. bNumber of shear keys = 0 means the joint with flat interface.
  3. cUHPC: specified compressive strength = 180 MPa.
  4. dMortar: specified compressive strength = 30 MPa.
  5. eConcrete: specified compressive strength = 35 MPa.