Recycled glass powder (GP) has recently been widely used as a complementary cementitious material to replace a part of the Portland cement in concrete. However, unlike the chemistry of the Portland cement hydration, more studied and mastered, the mechanism of GP reaction that occurs in-situ during the mixture hydration, is less studied. To overcome this, a first study was focused on the reactivity of the anhydrous glass powder surface over time and its effect on physico-chemical and mechanical properties of concrete. The results showed a very good stability of GP surface. Actually, Portland cement mortars incorporating 20% GP at different ages exhibited the same required properties. The second step, which is the subject of this paper, consists of studying the behavior of GP alone in water and identifying species likely to involve in the hydration reaction in presence of the cement. pH of suspensions and chemical composition of leachates were monitored respectively by pH-meter and inductively coupled plasma mass spectrometry (ICP-MS) as a function of contact time, water-to-solid mass ratio (W/S) and GP particle size. Results reveal an instantaneous increase of pH after mixing GP with water resulting in the passage of surface alkali ions in the solution. Moreover, an enhancement of silicon content in solution is observed suggesting a partial dissolution of the glass network. The dissolution rate increases with increasing W/S ratio and decreasing particle size. Thus, dissolved silica species would react with portlandite from cement hydration explaining good mechanical properties generally observed in concrete containing GP at long term. Accordingly, due to its high amorphous silica content, GP could be an excellent alternative for conventional supplementary cementitious materials such as fly ashes which are not locally available.
Published in | Advances in Materials (Volume 7, Issue 1) |
DOI | 10.11648/j.am.20180701.12 |
Page(s) | 9-14 |
Creative Commons |
This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited. |
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Copyright © The Author(s), 2018. Published by Science Publishing Group |
Recycled Glass Powder, Amorphous Silica, Reactivity, Aqueous Medium, Chemical Species
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APA Style
Monique Tohoué Tognonvi, Léon Koffi Konan, Séka Simplice Kouassi, Hervé Bi Irié Gouré Doubi, Ablam Zidol, et al. (2018). Reactivity of Glass Powder in Aqueous Medium. Advances in Materials, 7(1), 9-14. https://doi.org/10.11648/j.am.20180701.12
ACS Style
Monique Tohoué Tognonvi; Léon Koffi Konan; Séka Simplice Kouassi; Hervé Bi Irié Gouré Doubi; Ablam Zidol, et al. Reactivity of Glass Powder in Aqueous Medium. Adv. Mater. 2018, 7(1), 9-14. doi: 10.11648/j.am.20180701.12
AMA Style
Monique Tohoué Tognonvi, Léon Koffi Konan, Séka Simplice Kouassi, Hervé Bi Irié Gouré Doubi, Ablam Zidol, et al. Reactivity of Glass Powder in Aqueous Medium. Adv Mater. 2018;7(1):9-14. doi: 10.11648/j.am.20180701.12
@article{10.11648/j.am.20180701.12, author = {Monique Tohoué Tognonvi and Léon Koffi Konan and Séka Simplice Kouassi and Hervé Bi Irié Gouré Doubi and Ablam Zidol and David Harbec and Arezki Tagnit-Hamou}, title = {Reactivity of Glass Powder in Aqueous Medium}, journal = {Advances in Materials}, volume = {7}, number = {1}, pages = {9-14}, doi = {10.11648/j.am.20180701.12}, url = {https://doi.org/10.11648/j.am.20180701.12}, eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.am.20180701.12}, abstract = {Recycled glass powder (GP) has recently been widely used as a complementary cementitious material to replace a part of the Portland cement in concrete. However, unlike the chemistry of the Portland cement hydration, more studied and mastered, the mechanism of GP reaction that occurs in-situ during the mixture hydration, is less studied. To overcome this, a first study was focused on the reactivity of the anhydrous glass powder surface over time and its effect on physico-chemical and mechanical properties of concrete. The results showed a very good stability of GP surface. Actually, Portland cement mortars incorporating 20% GP at different ages exhibited the same required properties. The second step, which is the subject of this paper, consists of studying the behavior of GP alone in water and identifying species likely to involve in the hydration reaction in presence of the cement. pH of suspensions and chemical composition of leachates were monitored respectively by pH-meter and inductively coupled plasma mass spectrometry (ICP-MS) as a function of contact time, water-to-solid mass ratio (W/S) and GP particle size. Results reveal an instantaneous increase of pH after mixing GP with water resulting in the passage of surface alkali ions in the solution. Moreover, an enhancement of silicon content in solution is observed suggesting a partial dissolution of the glass network. The dissolution rate increases with increasing W/S ratio and decreasing particle size. Thus, dissolved silica species would react with portlandite from cement hydration explaining good mechanical properties generally observed in concrete containing GP at long term. Accordingly, due to its high amorphous silica content, GP could be an excellent alternative for conventional supplementary cementitious materials such as fly ashes which are not locally available.}, year = {2018} }
TY - JOUR T1 - Reactivity of Glass Powder in Aqueous Medium AU - Monique Tohoué Tognonvi AU - Léon Koffi Konan AU - Séka Simplice Kouassi AU - Hervé Bi Irié Gouré Doubi AU - Ablam Zidol AU - David Harbec AU - Arezki Tagnit-Hamou Y1 - 2018/03/27 PY - 2018 N1 - https://doi.org/10.11648/j.am.20180701.12 DO - 10.11648/j.am.20180701.12 T2 - Advances in Materials JF - Advances in Materials JO - Advances in Materials SP - 9 EP - 14 PB - Science Publishing Group SN - 2327-252X UR - https://doi.org/10.11648/j.am.20180701.12 AB - Recycled glass powder (GP) has recently been widely used as a complementary cementitious material to replace a part of the Portland cement in concrete. However, unlike the chemistry of the Portland cement hydration, more studied and mastered, the mechanism of GP reaction that occurs in-situ during the mixture hydration, is less studied. To overcome this, a first study was focused on the reactivity of the anhydrous glass powder surface over time and its effect on physico-chemical and mechanical properties of concrete. The results showed a very good stability of GP surface. Actually, Portland cement mortars incorporating 20% GP at different ages exhibited the same required properties. The second step, which is the subject of this paper, consists of studying the behavior of GP alone in water and identifying species likely to involve in the hydration reaction in presence of the cement. pH of suspensions and chemical composition of leachates were monitored respectively by pH-meter and inductively coupled plasma mass spectrometry (ICP-MS) as a function of contact time, water-to-solid mass ratio (W/S) and GP particle size. Results reveal an instantaneous increase of pH after mixing GP with water resulting in the passage of surface alkali ions in the solution. Moreover, an enhancement of silicon content in solution is observed suggesting a partial dissolution of the glass network. The dissolution rate increases with increasing W/S ratio and decreasing particle size. Thus, dissolved silica species would react with portlandite from cement hydration explaining good mechanical properties generally observed in concrete containing GP at long term. Accordingly, due to its high amorphous silica content, GP could be an excellent alternative for conventional supplementary cementitious materials such as fly ashes which are not locally available. VL - 7 IS - 1 ER -