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Advances in Concrete Construction   Volume 5, Number 3, June 2017, pages 241-255
DOI: http://dx.doi.org/10.12989/acc.2017.5.3.241
 
Evaluation of incorporating metakaolin to evaluate durability and mechanical properties of concrete
Alireza Joshaghani, Mohammad Amin Moeini and Mohammad Balapour

 
Abstract     [Full Text]
    Concrete is known to be the most used construction material worldwide. The environmental and economic aspects of Ordinary Portland Cement (OPC) containing concrete have led research studies to investigate the possibility of incorporating supplementary cementitious materials (SCMs) in concrete. Metakaolin (MK) is one SCM with high pozzolanic reactivity generated throughout the thermal activation of high purity kaolinite clay at a temperature ranging from 500oC to 800oC. Although many studies have evaluated the effect of MK on mechanical properties of concrete and have reported positive effects, limited articles are considering the effect of MK on durability properties of concrete. Considering the lifetime assessment of concrete structures, the durability of concrete has become of particular interest recently. In the present work, the influences of MK on mechanical and durability properties of concrete mixtures are evaluated. Various experiments such as slump flow test, compressive strength, water permeability, freeze and thaw cycles, rapid chloride penetration and surface resistivity tests were carried out to determine mechanical and durability properties of concretes. Concretes made with the incorporation of MK revealed better mechanical and durability properties compared to control concretes due to combined pozzolanic reactivity and the filler effect of MK.
 
Key Words
    concrete; metakaolin; mechanical properties; durability; compressive strength; rapid chloride permeability test; surface resistivity
 
Address
Alireza Joshaghani: Zachry Department of Civil Engineering, Texas A&M University, College Station, TX-77840, USA
Mohammad Amin Moeini and Mohammad Balapour: Department of Civil Engineering, Amirkabir University of Technology, Tehran, Iran
 
References
    -acc0503004-
 

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