Issue 61

A.A. ELShami et alii, Frattura ed Integrità Strutturale, 61 (2022) 352-371; DOI: 10.3221/IGF-ESIS.61.24

Fine aggregate: The sand utilized was siliceous natural sand; the sand was obtained from a local warehouse (Mansoura, Egypt). Testing of the used fine aggregate has complied with the Egyptian standard specifications E.S.S 1109-2008 [35]. Tab. 3 and Tab. 4 show the properties of used fine aggregate.

Property

Sand

Limits*

Specific weight

2.5

- - -

Bulk density (t/m 3 ) Fineness modulus

1.52

3

Material finer than No 200 sieve% Less than 3% Table 3: The physical properties of the fine aggregate. 2.62

Sieve size (mm)

0.15

0.3 9.8

0.6

1.18 77.9

2.36 90.7

4.75

Passing%

1.4

58.3

100

(89-100)%

Limits of E.s.s(1109)

(0-15)%

(5-48)%

(25-80)%

(45-100)%

(65-100)%

Table 4: Grading of used sand. Coarse aggregate: The coarse aggregate used was rounded and was obtained from a local warehouse (Mansoura, Egypt). The used coarse aggregate tested in accordance with Egyptian standard specifications E.S.S. 1109-2008 [35]. Tabs. 5 and 6 show the properties of used coarse aggregate.

Property

Test result

Specific gravity

2.55 1.55 12.5

Bulk density (t/m 3 )

Maximum nominal Size

Absorption% 0.8 Table 5: physical properties of used coarse aggregate.

Sieve size (mm)

4.75 2.15

9.5

12.5

19

Passing%

64.1

96

100

Limits of E.s.s(1109)

(0-10)%

(50-85)%

(90-100)%

100%

Table 6: Grading of used coarse aggregate.

Silica Fume (SF): The silica fume used in this study as a mineral admixture was brought from Sika Company; the specific gravity of silica fume is 2.2. The chemical properties of silica fume are shown in Tab. 7 and the physical properties of silica fume are shown in Tab. 8 as derived from the manufacturer's data sheet.

SiO 2

C

Al 2 O 3 Fe 2 O 3

CaO

MgO

Na 2 O

R 2 O 3

K 2 O

SO 3

C1

LO1

96.0

0.6

0.25

0.6

0.3

0.6

0.2

-

0.65

0.18

0.02

0.6

Table 7: Chemical properties of Silica fume.

Result*

Property

170000

Surface area (cm 2 /gm)

8.00

Particle size, µm

2.20 Specific gravity Table 8: The physical properties of the used silica fume (*by the manufacture data sheet).

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