Investigation of Fracture Energy of Structural Concrete made with Lightweight Aggregate

ENTEZARI, ALIREZA; Esmaeili, Jamshid

doi:10.22065/jsce.2024.440542.3345

Investigation of Fracture Energy of Structural Concrete made with Lightweight Aggregate

Document Type : Original Article

Authors

ALIREZA ENTEZARI ¹

Jamshid Esmaeili ²

¹ Assistant professor, Department of Civil Engineering, Faculty of Technology and Engineering, Azarbaijan Shahid Madani University, Tabriz, Iran

² Professor, Department of Structural Engineering, Faculty of Civil Engineering, University of Tabriz, Tabriz, Iran

10.22065/jsce.2024.440542.3345

Abstract

In this study, total fracture energy of Lightweight aggregate concrete as one of the parameters of fracture mechanics will be investigated experimentally. In the preparation of concrete, pumice and scoria aggregates from Azerbaijan - Iran region were used and according to the type of aggregates, four mix designs concrete have been considered for testing. For all the mix designs, the amount of cement, concrete plasticizer and curing conditions of the concrete samples are the same and only the type of aggregates is variable. To determine the fracture energy, 12 concrete prisms (500 x 100 x 100 mm in dimensions) with 40 mm notch depth (at the center of tensile side) for three - point flexural strength test were fabricated. This study research, the fracture energy of concrete was determined according to the RILEM (load - displacement curves) and Japan Concrete Institute Standard ( crack mouth opening displacement curves). The fracture energy of concrete prepared from scoria aggregate for the compressive strength of 27.2 - 36.9 MPa in the limit of 70.9 - 110.3 N/m and pumice aggregate for the compressive strength of 23 - 24.4 MPa in the limit of 58-75.5 N/m is variable, which has a lower value compared to normal concrete with the same resistance conditions. this subject expresses the brittle behavior of Lightweight aggregate concrete prepared with scoria and pumice compared to normal concrete.

Keywords

Aggregate

Fracture energy

Lightweight concrete

Pumice

Scoria

Subjects

Structural Analysis and Design (Concrete)

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