Influence of mineral admixtures on the residual mechanical properties and durability characteristics of self-compacting concrete subjected to high temperature
Document Type
Article
Publication Date
1-1-2022
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. ©, Engineers Australia.
Keywords
Acid resistance, Chlorine compounds, Compressive strength, Concrete additives, Fire resistance, Fly ash, Heat resistance, Minerals, Self compacting concrete, Silica fume, Water absorption, Concrete specimens, Elevated temperature, Exposed to, Fire accident, Highest temperature, In-buildings, Mechanical durability, Mineral admixtures, Strength, Structural engineer, Durability
Divisions
fac_eng
Funders
Science and Engineering Research Board [Grant No:YSS/2015/001196]
Publication Title
Australian Journal of Civil Engineering
Volume
20
Issue
2
Publisher
Taylor and Francis Ltd.