Activation of Early Age Strength in Fly Ash Blended Cement by Adding Limestone Calcined Clay (LC<sup>2</sup>) Pozzolan: Fid-Bau Portal

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Activation of Early Age Strength in Fly Ash Blended Cement by Adding Limestone Calcined Clay (LC²) Pozzolan

Parashar, Anuj / Medepalli, Satya / Shah, Vineet / Bishnoi, Shashank

The low early age strength gain of fly ash-based Portland pozzolana cement (PPC) poses a challenge in many applications. This study tries to improve the early age strength gain of fly ash-based PPC by blending it with limestone calcined clay pozzolan (LC²). Ordinary Portland cement was blended with a typical low calcium fly ash (FA) at replacement levels of 30 and 40% termed as PPC-30% and PPC-40%, respectively. To enhance the mechanical performance of PPC-30% and PPC-40%, the fly ash was blended with LC² in 1:1 mix proportion. Hydration and strength gain were evaluated using isothermal calorimetry and strength activity tests. Heat evolution results show that the addition of LC² pozzolana has increased the early age hydration of the blended pastes. Strength activity index of mortar showed improvement in early age performance in both the mixes compared to PPC. Moreover, 30% replacement by LC² is found to be more beneficial and can achieve strengths comparable to that of OPC.

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Activation of Early Age Strength in Fly Ash Blended Cement by Adding Limestone Calcined Clay (LC²) Pozzolan

Parashar, Anuj / Medepalli, Satya / Shah, Vineet / Bishnoi, Shashank

The low early age strength gain of fly ash-based Portland pozzolana cement (PPC) poses a challenge in many applications. This study tries to improve the early age strength gain of fly ash-based PPC by blending it with limestone calcined clay pozzolan (LC²). Ordinary Portland cement was blended with a typical low calcium fly ash (FA) at replacement levels of 30 and 40% termed as PPC-30% and PPC-40%, respectively. To enhance the mechanical performance of PPC-30% and PPC-40%, the fly ash was blended with LC² in 1:1 mix proportion. Hydration and strength gain were evaluated using isothermal calorimetry and strength activity tests. Heat evolution results show that the addition of LC² pozzolana has increased the early age hydration of the blended pastes. Strength activity index of mortar showed improvement in early age performance in both the mixes compared to PPC. Moreover, 30% replacement by LC² is found to be more beneficial and can achieve strengths comparable to that of OPC.

Activation of Early Age Strength in Fly Ash Blended Cement by Adding Limestone Calcined Clay (LC²) Pozzolan

Parashar, Anuj / Medepalli, Satya / Shah, Vineet / Bishnoi, Shashank

The low early age strength gain of fly ash-based Portland pozzolana cement (PPC) poses a challenge in many applications. This study tries to improve the early age strength gain of fly ash-based PPC by blending it with limestone calcined clay pozzolan (LC²). Ordinary Portland cement was blended with a typical low calcium fly ash (FA) at replacement levels of 30 and 40% termed as PPC-30% and PPC-40%, respectively. To enhance the mechanical performance of PPC-30% and PPC-40%, the fly ash was blended with LC² in 1:1 mix proportion. Hydration and strength gain were evaluated using isothermal calorimetry and strength activity tests. Heat evolution results show that the addition of LC² pozzolana has increased the early age hydration of the blended pastes. Strength activity index of mortar showed improvement in early age performance in both the mixes compared to PPC. Moreover, 30% replacement by LC² is found to be more beneficial and can achieve strengths comparable to that of OPC.

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Titel:

Activation of Early Age Strength in Fly Ash Blended Cement by Adding Limestone Calcined Clay (LC²) Pozzolan

Weitere Titelangaben:

RILEM Bookseries

Beteiligte:

Bishnoi, Shashank (Herausgeber:in) / Parashar, Anuj (Autor:in) / Medepalli, Satya (Autor:in) / Shah, Vineet (Autor:in) / Bishnoi, Shashank (Autor:in)

Erschienen in:

Calcined Clays for Sustainable Concrete ; Kapitel: 46 ; 391-396

RILEM Bookseries ; 25

Erscheinungsdatum:

14.04.2020

Format / Umfang:

6 pages

ISBN:

978-981-15-2806-4 , 978-981-15-2805-7

ISSN:

2211-0852 , 2211-0844

DOI:

https://doi.org/10.1007/978-981-15-2806-4_46

Medientyp:

Aufsatz/Kapitel (Buch)

Format:

Elektronische Ressource

Sprache:

Englisch

Schlagwörter:

Fly ash , LC<sup>2</sup> , Strength improvement Engineering , Building Materials , Sustainable Architecture/Green Buildings , Characterization and Evaluation of Materials , Solid Construction , Building Construction and Design

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