Optimization Potential of Mineral Waste-Based Alkali-Activated Binder Materials Through Target-Oriented Incorporation of Activators
RILEM Bookseries, Springer International Publishing Ag, ss.529-536, 2026
- Yayın Türü: Kitapta Bölüm / Araştırma Kitabı
- Basım Tarihi: 2026
- Doi Numarası: 10.1007/978-3-032-27919-4_62
- Yayınevi: Springer International Publishing Ag
- Sayfa Sayıları: ss.529-536
- Anahtar Kelimeler: Alkali-activation, Commercial Activators, Mechanical Properties, Mineral Waste Streams, Sustainability
- Maltepe Üniversitesi Adresli: Evet
Özet
Utilizing mineral wastes and secondary raw materials (WSRMs) as major precursors in alkali-activated materials (AAMs) significantly enhances their sustainability. However, the alkaline activator, a crucial component of AAMs, presents environmental and economic challenges due to its energy-intensive production and high costs. To address this, we tested different dosing strategies focused on the efficient use of liquid potassium waterglass activators in WSRM-based AAMs. Predefined binder formulations with varying proportions of potassium waterglass and tap water were evaluated. Workability was assessed through slump flow testing, and mechanical performance was characterized by uniaxial compressive strength tests conducted after 2, 7, and 28 days. These performance metrics were then analyzed in relation to the molar ratios of Al, Si, Ca and alkalis. Considering the existing boundary conditions (binder composition, activator type), mixes containing 30 – 35 wt.% activator show the highest uniaxial compressive strength. The results further indicate a more favorable influence of lower (20 wt.%) over higher (44 wt.%) activator dosages depending on the intended application field. Customized waterglass dosing approaches thus offer a practical pathway to reduce production costs and environmental impacts associated with AAMs.