Optimized Fresh and Hardened Properties of Strain Hardening Cementitious Composites: Effect of Mineral Admixtures, Cementitious Composition, Size, and Type of Aggregates
Publication: Journal of Materials in Civil Engineering
Volume 29, Issue 10
Abstract
The present paper thoroughly investigates the effects of mix design with various water-to-binder (W/B) ratios, types of mineral admixture and types and sizes of local sands on the tensile ductility of engineered cementitious composites (ECC). White and red dune sands—denoted W and D, whereas their sieved forms are denoted SW and SD, respectively—were collected from the Arabian Desert, the second largest on the earth. Fly ash (FA) and ground granulated blast furnace slag (GGBFS) were separately used as mineral admixtures in the production of ECC. The development of ductility in ECC mixtures incorporating FA was found to reduce with curing time, whereas it was found to increase with GGBFS. An ECC mixture containing 62% GGBFS with W/B ratio of 0.35 has delivered the best fresh and hardened properties with strain capacity of 4.2% and tensile strength of 5.2 MPa at 28 days. Water sorptivity of fully cracked dune sand–based ECC mixtures was lower than that given by normal concrete. It is concluded that dune sand–based ECC mixtures have provided comparable results to the reference silica sand–based ECC mixtures.
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Acknowledgments
This project was funded by the National Plan for Science, Technology, and Innovation (MAARIFAH), King Abdulaziz City for Science and Technology, Kingdom of Saudi Arabia, Award Number 12-ADV2591-02.
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Published In
Journal of Materials in Civil Engineering
Volume 29 • Issue 10 • October 2017
Copyright
©2017 American Society of Civil Engineers.
History
Received: Mar 10, 2016
Accepted: Apr 13, 2017
Published online: Jul 8, 2017
Published in print: Oct 1, 2017
Discussion open until: Dec 8, 2017
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