Degradation process of alkali-activated slag/fly ash and Portland cement-based pastes exposed to phosphoric acid
Jie Ren, Lihai Zhang, Rackel San Nicolas
Construction and Building Materials | Elsevier | Published : 2020
High costs are currently involved in the repair and replacement of sewage concrete pipes due to the severe damage caused by the acid-rich aggressive environments of sewage and drainage wastewater. Although it is known that, a high concentration of phosphoric acid exists in some sewer pipes, very few studies have been focused on its impact on various cementitious materials. The purpose of this study is to experimentally investigate the resistance of alkali-activated slag/fly ash-based pastes and compare them to ordinary Portland cement-based pastes exposed to phosphoric acid with different pH values (pH = 2, 3 and 4) for a period of 150 days. The experimental results revealed that alkali-acti..View full abstract
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The authors deliver great thanks to Chinese Scholarship Council (CSC), the Geopolymer and Mineral Processing Group laboratory in the University of Melbourne for financial and infrastructure support. This study was also supported by Mrs Laura Jukes who provided great help during the experimental parts. Thank you for the ARC Nano-Hub for financial support.