Influence of mineral admixtures on the residual mechanical properties and durability characteristics of self-compacting concrete subjected to high temperature

ABSTRACT

Structural engineers must be cautious about fire accidents in buildings, as a result critical deterioration occurs in the strength and serviceability of concrete structures. Self-Compacting Concrete (SCC) is an efficient material developed using Supplementary Cementitious Materials (SCM). This research intends to evaluate the effect of mineral admixtures such as Metakaolin (MK), Silica Fume (SF) and Fly Ash (FA) on the mechanical and durability characteristics of SCC exposed to elevated temperature. Two SCC mixes satisfying the European Federation of National Associations Representing for Concrete (EFNARC, 2005) workability stipulations developed to achieve 20MPa and 50MPa. The specimens were exposed to elevated temperatures following the ISO 834 standard fire curve. Compressive strength, water absorption, acid resistance and Rapid Chloride Penetration Test (RCPT) tests were carried out on heat-affected SCC specimens exposed to elevated temperature. A reduction in strength of 48% and 64% were obtained for the M20 and M50 grade SCC specimens, respectively.

KEYWORDS:

• Self-compacting concrete
• mineral admixtures
• elevated temperature
• strength
• durability

Acknowledgments

The authors wish to acknowledge the Science and Engineering Research Board, Department of Science and Technology of the Indian Government for the financial support (YSS/2015/001196) provided for carrying out this research.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported by the Science and Engineering Research Board [YSS/2015/001196].

Notes on contributors

Tattukolla Kiran

Tattukolla Kiran is currently pursuing a Masters in Structural Engineering at Karunya Institute of Technology and Sciences, Coimbatore, India. He is an integrative researcher, and his research area mainly focuses on High Performance Sustainable Concrete and Fire Behaviour of Concrete and Steel Materials.

Mervin Ealiyas Mathews

Mervin Ealiyas Mathews is an Assistant Professor in Civil Engineering Department at Mar Baselios Christian College of Engineering and Technology, Kerala, India. His Research area is Structural Fire Engineering that includes Improving the Fire Performance of Concrete, Development of Fire Proof Materials for Concrete and Steel and High Performance Sustainable Concrete.

Anand N

Dr.Anand.N, is an Associate Professor in Civil Engineering Department at Karunya Institute of Technology and Sciences, Coimbatore, India. His area of research includes Structural Fire Engineering, High Performance Concrete, Failure Analysis Concrete and Steel Materials, Soft Computing in Structural Engineering and Nondestructive Testing and Evaluation.

U. Johnson Alengaram

Dr U. Johnson Alengaram is an Associate Professor and Director of Centre for Innovative Construction Technology (CICT), a Research Centre under the Faculty of Engineering, University of Malaya, Kuala Lumpur. His Research interests are Materials & Structures, Concrete Technology, Utilization of Waste Materials in Concrete, Lightweight Concrete.

A Diana Andrushia

Dr.A.Diana Andrushia, is an Assistant Professor in Electronics and Communication Engineering Department at Karunya Institute of Technology and Sciences, Coimbatore, India. His area of research includes Artificial Intelligence and Machine Learning, Structural Optimization, Engineering Applications of Image Processing and Soft Computing in Structural Health Monitoring.