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Effects of micro-structure characteristics of interfacial transition zone on the compressive strength of self-compacting geopolymer concrete

Demie, S and Nuruddin, F and Shafiq, N. (2013) Effects of micro-structure characteristics of interfacial transition zone on the compressive strength of self-compacting geopolymer concrete. Construction and Building Materials, 41 . pp. 91-98. ISSN 0950-0618

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Abstract

This paper presents an experimental study of the influence of different superplasticizer dosage on compressive strength and micro-structure characteristics of interfacial transition zone (ITZ) prepared with fly ash based self-compacting geopolymer concrete (SCGC). The correlations between compressive strength development and microstructure of interfacial transition zone were also investigated. Concrete specimens were prepared with different superplasticizer (SP) dosage namely 3%, 4%, 5%, 6% and, 7% and curedat 70 �C for duration of 48 h. Field emission scanning electron microscope (FESEM) observations revealed that improved performance of concrete was found when the compressive strength increased through formation of dense ITZ between the aggregate and binder matrix at higher SP dosage. There are good correlations between compressive strength and micro-structure characteristics of interfacial transition zone. The FESEM analysis revealed that relatively a loose and porous interfacial zone was found between the binder and aggregate for low SP dosage and theses loose and porous ITZ decreased the performance of concrete by lowering the compressive strength; however, a dense ITZ was found between the aggregate and binder matrix for higher SP dosage that enhanced the concrete performance by increasing the compressive strength.

Item Type:Article
Subjects:T Technology > TA Engineering (General). Civil engineering (General)
Academic Subject One:Academic Department - Civil Engineering - Structures, materials and construction
Departments / MOR / COE:Departments > Civil Engineering
ID Code:8945
Deposited By: Prof Ir Dr Muhd Fadhil Nuruddin
Deposited On:25 Feb 2013 02:09
Last Modified:25 Feb 2013 02:09

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