Issue 63

A. Kh. Elbaz et alii, Frattura ed Integrità Strutturale, 63 (2023) 257-270; DOI: 10.3221/IGF-ESIS.63.20

Span (mm) 2000 2000 2000 2000 2000

Width (mm)

Depth (mm)

Fcu (MPa)

RFT.

Specimen

Stirrups

Remarks

Top

Bot.

B1 B2 B3 B4 B5

200 200 200 200 200

300 300 300 300 300

40 40 40 40 40

2T10 2T10 2T10 2T10 2T10

2T12 2T12 2T12 2T12 2T12

T10@200 T10@200 T10@200 T10@200 T10@200

Control

Cube Foam 100*100*50 mm Mild Steel at 25 cm Mid Span Mild Steel at 50 cm Mid Span Mild Steel at 100 cm Mid Span

Table 1: Details of experimental program tested specimens.

High Tensile Steel (T12)

High Tensile Steel (T10)

Properties

Specification*

Yield Stress (MPa) Ultimate Stress (MPa)

556

547

Min. 500 Min. 600

730.33 0.846 0.215

725.45 0.592 0.223

Weight per meter length (kg)

----

Elongation (%)

Min. 13 %

Table 2: Properties of high tensile steel used in the experimental program.

Figure 2: Wooden formwork for specimens.

Concrete mix design The concrete used in all the experimental work had a compressive strength of 40 N/mm 2 after 28 days. The mixed proportions of the materials used in this research were examined in Tab. (3).

Concrete Ingredient

Weights (kg/m 3 )

Water

188 620

Sand

Coarse Aggregate

1130

3/4" 3/8"

50% 50%

565 565 450

Cement

Admixture: Basef 874 high range water-reducing

1.8%

8L

Admixture: Basef 875 Superplasticizer

0.3%

1.2L

Table 3: Concrete mix proportions /m 3 .

260