Abstract
In the context of sustainable development for concrete production, local aggregates and recycled aggregates should be preferred but they can be porous and of lower quality. As a result, the compressive strength and the durability of concrete are adversely affected. In a preliminary understanding and with a view to accentuating phenomena occurring in the concrete, the Elementary Model (EM composed of paste and gravel, was studied. In this paper, the effect of Water Porosity (WP), moisture state and volume of coarse aggregates, as well as the nature of mineral admixture on the WP of EM was taken into account. Results indicated that volume and water porosity of aggregate are the two most important factors affecting WP of EM. Besides, it was also shown that aggregate porosity has the same trend of impact on the WP of EM while does not have the same trend of impact concerning the effect of the cement paste-aggregate interface on the WP of EM whatever the nature of mineral admixture, water porosity, moisture state and volume of aggregate. Explanatory attempts are proposed from the Scanning electron microscope (SEM) in combination with Energy dispersive spectroscopy (EDS) to support for statistic and ranking analysis.
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Long, T.D., Franck, C., Michel, M. (2020). Impact of the Porosity of Coarse Aggregates on the Structuration of the Paste-Aggregate Interface: Elementary Model Study. In: Ha-Minh, C., Dao, D., Benboudjema, F., Derrible, S., Huynh, D., Tang, A. (eds) CIGOS 2019, Innovation for Sustainable Infrastructure. Lecture Notes in Civil Engineering, vol 54. Springer, Singapore. https://doi.org/10.1007/978-981-15-0802-8_68
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DOI: https://doi.org/10.1007/978-981-15-0802-8_68
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