Basic Properties of Structural LWAC Based on Waste and Recycled Materials
Publication: Journal of Materials in Civil Engineering
Volume 29, Issue 1
Abstract
This paper presents results of experimental research on the impact of different types of lightweight aggregates and supplementary cementitious material (fly ash and metakaolin), on basic physical and mechanical properties of structural lightweight aggregate concrete (LWAC). The used aggregates are: lightweight aggregate obtained by firing waste materials (mixture of stone sludge, paper sludge, and fly ash) and expanded recycled glass. The results showed that it is possible to obtain structural LWAC with both types of lightweight aggregates even with substitution of cement with fly ash up to 45% (by mass). LWAC with high amount of active mineral admixtures and low water-binder ratio achieved higher compressive strength and specific strength compared to LWAC made only with portland cement. Comparison of static () and dynamic () modulus of elasticity showed that, for everyday engineering practice, static modulus of elasticity of LWAC can be determined using proposed expression with high reliability.
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Acknowledgments
The work reported in this paper is a part of the investigation within the research project TR 36017 “Utilization of by-products and recycled waste materials in concrete composites in the scope of sustainable construction development in Serbia: Investigation and environmental assessment of possible applications” supported by the Ministry for Science and Technology, Republic of Serbia. This support is gratefully acknowledged.
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Published In
Journal of Materials in Civil Engineering
Volume 29 • Issue 1 • January 2017
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Dec 16, 2015
Accepted: May 25, 2016
Published online: Jul 22, 2016
Discussion open until: Dec 22, 2016
Published in print: Jan 1, 2017
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