A comprehensive experimental study was conducted to investigate effect of different production parameters such as activator type, activator concentration and curing temperature on fresh and hardened properties of volcanic tuff based geopolymer paste (GP) samples. Volcanic tuff obtained from Nevşehir (Central Anatolia, Turkey) was ground to particle size less than 45 μm, after that alkali activation process was provided with two type of alkali activators such as NaOH and NaOH+Na₂SiO₃ (SH and SH + SS) solutions. Produced geopolymer samples were cured at different temperatures ranging from 23 to 150°C. Compressive strength, setting time, hydration heat of GP samples were investigated. Additionally, microstructural investigations were performed with SEM and XRD analyzes. As a result of modification of experimental parameters, compressive strength development reached to 41.43 MPa was obtained from GP samples, which did not harden in laboratory conditions. It was also determined that the alkali activation of volcanic tuff with SH exhibited better mechanical and microstructural properties than alkali activation with SH + SS.

中文翻译：

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各种因素对地质聚合物糊料性能的影响：对比研究

进行了全面的实验研究，以研究活化剂类型，活化剂浓度和固化温度等不同生产参数对基于火山凝灰岩的地质聚合物糊（GP）样品的新鲜和硬化性能的影响。从内夫谢希尔（土耳其中部安那托利亚中部）获得的火山凝灰粉被粉碎至小于45μm的粒径，然后在碱活化过程中提供了两种类型的碱活化剂，例如NaOH和NaOH + Na ₂ SiO ₃（SH和SH + SS）解决方案。生产的地质聚合物样品在23至150°C的不同温度下固化。研究了GP样品的抗压强度，凝固时间，水合热。另外，用SEM和XRD分析进行了微结构研究。修改实验参数的结果是，从GP样品获得的抗压强度发展到41.43 MPa，而这些样品在实验室条件下没有变硬。还确定了与SH + SS的碱活化相比，SH的火山凝灰岩的碱活化表现出更好的机械和微观结构性质。