Journal
CONSTRUCTION AND BUILDING MATERIALS
Volume 224, Issue -, Pages 158-172Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2019.07.069
Keywords
Low-carbon building material; Carbon negative construction; Fire resistance; Stress-strain behavior; Elastic modulus; Compressive strength; Failure mechanisms
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Funding
- Australian Research Council (ARC) grant through Industrial Transformation Training Centres grant
- ARC Centre for Advanced Manufacturing of Prefabricated Buildings [IC150100023]
- Discovery Early Career Researcher Award [DE190100217]
- Australian Research Council [DE190100217] Funding Source: Australian Research Council
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This study investigates the performance of three different types of cenosphere as a lightweight supplementary cementitious material for alkali-activated binder for lightweight carbon-negative hempconcrete for non-load bearing applications. Mechanical performance of hemp concrete exposed to three temperatures, room temperature (RT), 300 degrees C and 600 degrees C are studied using mechanical testing, thermogravimetric analysis (TGA) and Fourier-transform Infrared Spectroscopy (FTIR). Hemp concrete with cenosphere binder remained its integrity and showed a lower load carrying capacity even after exposure to elevated temperatures. Compressive strength capacity and elastic modulus of the samples reduced with the increase of temperature and shows the composite material is more suitable for non-load bearing application considering its mechanical behavior and fire requirements. The density, age, and type of cenosphere showed effects on mechanical properties at room temperature and elevated temperatures. The study shows that alkali activated cenosphere binders can potentially be a sustainable alternative to the lime binder. (C) 2019 Elsevier Ltd. All rights reserved.
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