Performance of self-compacting concrete with treated rice husk ash at different curing temperatures

Almutlaqah, Ayman, Alshahrani, Abdullah ORCID: https://orcid.org/0000-0002-2454-3427, Maddalena, Riccardo ORCID: https://orcid.org/0000-0001-6251-3782 and Kulasegaram, Sivakumar ORCID: https://orcid.org/0000-0002-9841-1339 2024. Performance of self-compacting concrete with treated rice husk ash at different curing temperatures. Journal of Building Engineering 97 , 110652. 10.1016/j.jobe.2024.110652

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Abstract

Self-compacting concrete (SCC) is currently gaining traction as a replacement to conventional vibrated concrete. Its distinct microstructure leads to varied mechanical behaviour under different curing temperatures. In the past various supplementary cementitious materials (SCMs) were used in SCC to investigate their respective effects on the performance. However, there has been no systematic studies conducted to determine the effect of different curing temperature on the sensitivity reaction of rice husk ash (RHA) in SCC. This research focuses on high-strength SCC with SCMs such as RHA, silica fume (SF), fly ash (FA), and ground granulated blast-furnace slag (GGBS), exploring their applicability for concrete structures under varying curing temperatures. Heat of hydration, compressive strength and open porosity of SCC specimens were assessed at various temperature. Results indicate high curing temperatures expedite the hydration and pozzolanic reaction, refining the microstructure and increasing the early-age concrete strength, but compromising the long-term performance, potentially mitigated by the use of SCMs. Conversely, lower curing temperature, impedes hydration leading to gradual strength gain, particularly with SCMs, yet yielding significant strength increases at later concrete age. SCMs presence and curing temperature significantly influence maturity function-based strength predictions, impacting strength trends in the samples studied.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering
Publisher:	Elsevier
ISSN:	2352-7102
Date of First Compliant Deposit:	25 September 2024
Date of Acceptance:	1 September 2024
Last Modified:	01 Oct 2024 09:11
URI:	https://orca.cardiff.ac.uk/id/eprint/172125

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