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Fracture Properties and Process Zone Length of High Strength Concrete Using Size Effect Method.

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Last updated: 04 Jan 2025

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Tags

Civil Engineering

Abstract

 This paper gives a report on a fracture mechanics study of legal strength concrete with compressive strength up  80 MPa.. 6 mixes were selected, designed to achieve a slump above 100 mm and strength up to 80 MPa.. The investigation used tiered levels of silica fume(0, 10%, 20% by weight of cement) and two coarse aggregate proportions of local aggregate (0.48, 0.65 by volume) In each case, compressive strength, splitting tensile strength, flexural strength fracture energy Gr and Fracture process zone Cr were determined. A test method for determining fracture energy Gr and process zone length Cr, defined by the size effect wide is generalized theory, has been proposed. It allows the use of specimenc of the different size and shape but with same notch length. This paper proposes test und data analysis procedures. The results obtained by the Size effect law (SEL) apparently follow the trend of fracture energy increasing as the compressive strength of the concrete increases. On the other hand, process zone length or decrease considerably with increase in strength. The Bazant's  size effect taw gives a very good account of the size dependency of flexural strength for both normal and high strength concrete. As observed in the size effect curve, the fracture behavior of the HSC seems to be more brittle than that of the normal strength concrete. Linear classic fracture mechanics (LEFM) is applicable to HSC in the normal size range than nonlinear fracture mechanics. 

DOI

10.21608/bfemu.2020.129600

Authors

First Name

Ahmed Hassan

Last Name

Abdel-Reheem

MiddleName

Ahmed

Affiliation

Structural Engineering Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egyypt

Email

-

City

Mansoura

Orcid

-

First Name

Mohamed Gamal

Last Name

Mohamed Mahdy

MiddleName

Ibraheem

Affiliation

Structural Engineering Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt

Email

-

City

Mansoura

Orcid

-

Volume

31

Article Issue

2

Related Issue

19223

Issue Date

2006-06-01

Receive Date

2006-03-11

Publish Date

2020-12-14

Page Start

11

Page End

22

Print ISSN

1110-0923

Online ISSN

2735-4202

Article File

BFEMU_Volume 31_Issue 2_Pages 11-22.pdf

PDF . 389.2kB

Link

https://bfemu.journals.ekb.eg/article_129600.html

Detail API

https://bfemu.journals.ekb.eg/service?article_code=129600

Order

2

Type

Research Studies

Type Code

1,205

Publication Type

Journal

Publication Title

MEJ. Mansoura Engineering Journal

Publication Link

https://bfemu.journals.ekb.eg/

MainTitle

Fracture Properties and Process Zone Length of High Strength Concrete Using Size Effect Method.

Details

Type

Article

Created At

22 Jan 2023