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- Publisher Website: 10.1016/j.conbuildmat.2022.129250
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Article: Temperature-dependent compressive stress-strain behaviors of alkali-activated slag-based ultra-high strength concrete
Title | Temperature-dependent compressive stress-strain behaviors of alkali-activated slag-based ultra-high strength concrete |
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Authors | |
Keywords | Alkali-activated concrete Stress-strain behaviors Temperature-dependent Ultra-high strength |
Issue Date | 28-Nov-2022 |
Publisher | Elsevier |
Citation | Construction and Building Materials, 2022, v. 357 How to Cite? |
Abstract | In this work, the uniaxial compressive behaviors of alkali-activated slag-based ultra-high strength concrete (AAS-UHSC) subjected to different temperatures were investigated, with an emphasis on the temperature-dependent stress-strain relation. To this end, 104 cylinder specimens with three steel fiber contents (0.5%, 1.0%, and 1.5%) and two water-to-binder (W/B) ratios (0.20 and 0.25) were tested upon the monotonic and cyclic compression performed at ambient temperature (20 ℃) and four elevated temperatures (200, 400, 600, and 800 ℃). The test results showed that the mechanical properties of AAS-UHSC in terms of elastic modulus, ultimate strength, energy dissipation, and post-peak softening can be effectively improved with the fiber inclusion, regardless of the W/B ratio. Moreover, AAS-UHSC exhibited a quite different plastic strain evolution law featured as two discontinuous stages due to the damage localization and possessed better energy dissipation capacity compared to OPC-based concretes. After being exposed to elevated temperatures, a consistent decline in compressive strength was observed as the temperature increased, with residual strength at 800 ℃ remaining around 10% of the ultimate compressive strength at 20 ℃. Based on the test results, a unified empirical temperature-dependent model was proposed to capture the main features of the constitutive compressive stress-strain relations of AAS-UHSC. The fairly good comparisons between test results and model predictions in different loading scenarios demonstrated a compromise between the accuracy and the generality of the model and contributed a beneficial addition to the understanding of nonlinear responses of AAS-UHSC. |
Persistent Identifier | http://hdl.handle.net/10722/344287 |
ISSN | 2023 Impact Factor: 7.4 2023 SCImago Journal Rankings: 1.999 |
DC Field | Value | Language |
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dc.contributor.author | Yang, Yinjie | - |
dc.contributor.author | Huang, Le | - |
dc.contributor.author | Xu, Lihua | - |
dc.contributor.author | Yu, Min | - |
dc.contributor.author | Ye, Hailong | - |
dc.contributor.author | Chi, Yin | - |
dc.date.accessioned | 2024-07-16T03:42:16Z | - |
dc.date.available | 2024-07-16T03:42:16Z | - |
dc.date.issued | 2022-11-28 | - |
dc.identifier.citation | Construction and Building Materials, 2022, v. 357 | - |
dc.identifier.issn | 0950-0618 | - |
dc.identifier.uri | http://hdl.handle.net/10722/344287 | - |
dc.description.abstract | <p>In this work, the uniaxial compressive behaviors of alkali-activated slag-based ultra-high strength concrete (AAS-UHSC) subjected to different temperatures were investigated, with an emphasis on the temperature-dependent stress-strain relation. To this end, 104 cylinder specimens with three steel fiber contents (0.5%, 1.0%, and 1.5%) and two water-to-binder (W/B) ratios (0.20 and 0.25) were tested upon the monotonic and cyclic compression performed at ambient temperature (20 ℃) and four elevated temperatures (200, 400, 600, and 800 ℃). The test results showed that the mechanical properties of AAS-UHSC in terms of elastic modulus, ultimate strength, energy dissipation, and post-peak softening can be effectively improved with the fiber inclusion, regardless of the W/B ratio. Moreover, AAS-UHSC exhibited a quite different plastic strain evolution law featured as two discontinuous stages due to the damage localization and possessed better energy dissipation capacity compared to OPC-based concretes. After being exposed to elevated temperatures, a consistent decline in compressive strength was observed as the temperature increased, with residual strength at 800 ℃ remaining around 10% of the ultimate compressive strength at 20 ℃. Based on the test results, a unified empirical temperature-dependent model was proposed to capture the main features of the constitutive compressive stress-strain relations of AAS-UHSC. The fairly good comparisons between test results and model predictions in different loading scenarios demonstrated a compromise between the accuracy and the generality of the model and contributed a beneficial addition to the understanding of nonlinear responses of AAS-UHSC.</p> | - |
dc.language | eng | - |
dc.publisher | Elsevier | - |
dc.relation.ispartof | Construction and Building Materials | - |
dc.rights | This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. | - |
dc.subject | Alkali-activated concrete | - |
dc.subject | Stress-strain behaviors | - |
dc.subject | Temperature-dependent | - |
dc.subject | Ultra-high strength | - |
dc.title | Temperature-dependent compressive stress-strain behaviors of alkali-activated slag-based ultra-high strength concrete | - |
dc.type | Article | - |
dc.identifier.doi | 10.1016/j.conbuildmat.2022.129250 | - |
dc.identifier.scopus | eid_2-s2.0-85140137731 | - |
dc.identifier.volume | 357 | - |
dc.identifier.eissn | 1879-0526 | - |
dc.identifier.issnl | 0950-0618 | - |