Durability of Engineered Cementitious Composites Incorporating High-Volume Fly Ash and Limestone Powder

Kazim Turk, Ceren Kina and Moncef L. Nehdi
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Kazim Turk: Department of Civil Engineering, Engineering Faculty, Inonu University, 44280 Malatya, Türkiye
Ceren Kina: Department of Civil Engineering, Faculty of Engineering and Natural Sciences, Malatya Turgut Ozal University, 44210 Malatya, Türkiye
Moncef L. Nehdi: Department of Civil Engineering, McMaster University, Hamilton, ON L8S 4L8, Canada

Sustainability, 2022, vol. 14, issue 16, 1-15

Abstract: This study investigates the effects of using limestone powder (LSP) and high-volume fly ash (FA) as partial replacement for silica sand (SS) and portland cement (PC), respectively, on the durability properties of sustainable engineered cementitious composites (ECC). The mixture design of ECC included FA/PC ratio of 1.2, 2.2 and 3.2, while LSP was used at 0%, 50% and 100% of SS by mass for each FA/PC ratio. Freeze-thaw and rapid chloride ions penetrability (RCPT) tests were performed to assess the durability properties of ECC, while the compressive and flexural strength tests were carried out to appraise the mechanical properties. Moreover, mercury intrusion porosimetry (MIP) tests were performed to characterize the pore structure of ECC and to associate porosity with the relative dynamic modulus of elasticity, RCPT and mechanical strengths. It was found that using FA/PC ratio of more than 1.2 worsened both the mechanical and durability properties of ECC. Replacement of LSP for SS enhanced both mechanical strengths and durability characteristics of ECC, owing to refined pore size distribution caused by the microfiller effect. It can be further inferred from MIP test results that the total porosity had a vital effect on the resistance to freezing–thawing cycles and chloride ions penetration in sustainable ECC.

Keywords: engineered cementitious composites; limestone powder; fly ash; mercury intrusion porosimetry; chloride ions; freeze–thaw; dynamic modulus of elasticity (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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