Issue 64

A. Abdo et alii, Frattura ed Integrità Strutturale, 64 (2023) 148-170; DOI: 10.3221/IGF-ESIS.64.10

Item SiO2

OPC 20.1 5.62 2.17 62.92 1.14 0.0096

SF

FA

92.26 0.89 1.97 0.49 0.96 0.009 0.33 0.42 1.31

62.32 23..95

Al2O3 Fe2O3

1.33 4.74 2.04

CaO MgO

Cl

-

SO3

2.92

1.25

Na2O K2O

0.3

-

0.85 3.84 3150

0.76 3.12

LOI S.D

-

2200 2130 Table 1: OPC, SF, and FA Chemical and physical properties. S.D= Specific density (kg/m 3 ).

a. Hooked end

b. Corrugated

Figure 1: Shape of used Steel Fibers.

Specific density ) 3 (kN/m

Length (mm)

Diameter (mm)

Tensile Strength ( MPa)

Item

Type

Aspect ratio

Hooked End Corrugated

Round Round

78 78

50 50

1 1

50 50

1000-1500 1000-1500

Table 2 : Physical properties of steel fiber.

Mix design SCC, HSC, and UHPC are examples of materials where Fuller's grading curve is unsuitable since it produces mixes that are difficult to deal with and have low cement content [29]. Nevertheless, using Andreasen and Andersen's [3] particle packing method, the UHPC grain size distribution may be identified. In this instance, the particle distribution is determined using Eqn. 1, where P(Di) denotes the percentage of all solids with a diameter smaller than the specified diameter Di, Dmax denotes the largest particle diameter, and q denotes the distribution modulus, which varies depending on the type of concrete.          q P Di D Di max (1) Based on the particle density employed in the study, the UHPFRC combination was created. By increasing the component material filling densities, the performance of the concrete mixture can be improved. The Andreasen and Andersen equation was modified to create the UHPFRC mixes Funk and Dinger [3], presented :

q

q

 q D D min D max D min  q

 



P D

(2)

151