Finite Element Modeling of the Transition Zone between Aggregat and Mortar in Concrete

Han , Ay Lie and Parang , Sabdono and Joko , Purnomo (2012) Finite Element Modeling of the Transition Zone between Aggregat and Mortar in Concrete. The 1st International Conference on Sustainable Civil Engineering Structures and Construction Materials . pp. 130-137. ISSN 978-602-95687-7-6

PDF (Full Paper )


Visual observations to the Interfacial Transition Zone (ITZ) between aggregate and mortar in concrete showed that this area differs significantly to the bulk mortar, further away from the ITZ. This ITZ has a higher porosity with a dissimilar crystal formation, therefore becoming the weak link in the material. In the past, concrete was seen as a two-phase material consisting of mortar and aggregates only. However, analyzing the material as a three-phase composite including the ITZ, will give a more realistic representation to its behavior. A Finite Element Model (FEM) was developed. The ITZ is modeled as a linkage element having a double spring, perpendicular and parallel to the ITZ surface. The individual load-deformation responses of these springs were obtained from laboratory tested specimens. Non-linearity is generated by evaluating the principal stresses at Gauss points, using the Kupfer-Hilsdorf-Rusch (1969) failure envelope and the CEB-FIB 2010 code. Iteration is conducted by the arc-length method developed by Riks-Wempners. The load-displacement curves resulted by the FEM were validated to laboratory tested specimens curves, to compare its effectiveness and asses the sensitivity of the model.

Item Type:Article
Subjects:T Technology > TA Engineering (General). Civil engineering (General)
Divisions:Faculty of Engineering > Department of Civil Engineering
Faculty of Engineering > Department of Civil Engineering
ID Code:51249
Deposited On:03 Jan 2017 10:05
Last Modified:03 Jan 2017 10:05

Repository Staff Only: item control page