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http://hdl.handle.net/10397/106594
Title: | Recycling of incinerated sewage sludge ash and waste glass powder in alkali-activated slag for sewer rehabilitation | Authors: | Sun, K Ali, HA Cai, Y Xuan, D Poon, CS |
Issue Date: | May-2024 | Source: | Materials and structures (Materiaux et constructions), May 2024, v. 57, no. 4, 88 | Abstract: | A new era has dawned in the manufacturing of cement-free binders with appropriate mechanical strengths and durability to combat CO2 emissions. However, the assessment of their performance in extreme conditions is ongoing. Here, we attempted to use incinerated sewage sludge ash (ISSA), a waste product of sewage sludge incineration that contains limited amounts of heavy metals, along with waste glass powder (GP) and ground granulated blast furnace slag (GGBS), as precursors to produce cement-free binders through alkali-activation. The alkali-activated materials (AAMs) were then subjected to an intensified sewage corrosion test for 6 months. The aim was to utilize the heavy metals in the ISSA as biocides to resist the biogenic acid attack on the AAMs. The experimental results indicated that superior performance was achieved by using a ternary binder prepared with ISSA, GP, and GGBS under biogenic acid simulation. Such enhanced durability can be attributed to the low Ca content in the resulting alkali-activated gels, which also reduced the grain size of gypsum formed and prevented expansion deterioration. Furthermore, the slow release of heavy metals from the AAMs prepared with the ISSA, evidenced by the leaching test results, was able to inhibit microbial growth. | Keywords: | Alkali-activated materials Biogenic acid attack Incinerated sewage sludge ash Leaching Waste glass |
Publisher: | Springer Dordrecht | Journal: | Materials and structures (Materiaux et constructions) | ISSN: | 1359-5997 | EISSN: | 1871-6873 | DOI: | 10.1617/s11527-024-02370-6 | Rights: | © The Author(s) 2024 This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. The following publication Sun, K., Ali, H.A., Cai, Y. et al. Recycling of incinerated sewage sludge ash and waste glass powder in alkali-activated slag for sewer rehabilitation. Mater Struct 57, 88 (2024) is available at https://doi.org/10.1617/s11527-024-02370-6. |
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