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Effect of Expansive Additives on the Early Age Elastic Modulus Development of Cement Paste by Ambient Response Method (ARM)

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International RILEM Conference on Early-Age and Long-Term Cracking in RC Structures (CRC 2021)

Abstract

Expansive additives are being widely used as shrinkage reducing/compensating admixture to reduce the early-age cracking and chemical prestressing. Such expansive additives influence the composition of cement hydration products and mechanical properties (stiffness and strength) of the cement and concrete, which ultimately affects the early age deformation. In the current study, the EMM-ARM (Elastic Modulus Measurement by Ambient Response Method), is used because of its ability to continuously monitor cement's real-time stiffness development paste with expansive additives. Stiffness development of the cement paste with expansive additives is captured in the unrestrained condition by allowing the free expansion during the stiffness measurement. An expansive additive, based on free lime, with a 10% (by weight) cement replacement ratio is studied in the current work. Results from the EMM-ARM are compared to the elastic modulus measurement from the compression testing of cylindrical specimens, and the mechanisms of expansive action on the microstructure in early-age are discussed.

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Correspondence to Mayank Gupta .

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Gupta, M., Go, I., Granja, J., Azenha, M., Ishida, T. (2021). Effect of Expansive Additives on the Early Age Elastic Modulus Development of Cement Paste by Ambient Response Method (ARM). In: Kanavaris, F., Benboudjema, F., Azenha, M. (eds) International RILEM Conference on Early-Age and Long-Term Cracking in RC Structures. CRC 2021. RILEM Bookseries, vol 31. Springer, Cham. https://doi.org/10.1007/978-3-030-72921-9_26

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  • DOI: https://doi.org/10.1007/978-3-030-72921-9_26

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-030-72920-2

  • Online ISBN: 978-3-030-72921-9

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