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首页> 外文期刊>Arabian Journal for Science and Engineering >Multi-Objective Optimization of Alkali Activator Agents for FA- and GGBFS-Based Geopolymer Lightweight Mortars
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Multi-Objective Optimization of Alkali Activator Agents for FA- and GGBFS-Based Geopolymer Lightweight Mortars

机译：基于FA和GGBFS的地聚合物轻质砂浆的碱活化剂的多目标优化

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This article presents the effect of different sodium hydroxide (NaOH) concentrations and sodium silicate-to-sodium hydroxide (Na2SiO3/NaOH) ratio on the fresh and some hardened properties of lightweight geopolymer mortar (LWGM). The main components of LWGM are lightweight pumice aggregate, crushed limestone aggregate, and alkali-activated FA or GGBFS. Effectiveness of aforementioned parameters was tested in terms of variation of the workability, fresh unit weight, absorption and strength of LWGM. The curing parameters were taken from a previous study conducted by the authors. The alkaline activator is a mix of 8, 10, 12 and 14 molar (M) of NaOH solution and Na2SiO3 with the following ratios 1:0.5, 1:1, 1:1.5, 1:2 and 1:2.5. The ratio of alkaline solution to binder was taken as 0.50. Full factorial experimental program was adopted to observe strength development, water absorption and sorptivity of LWGM. Therefore, 256 data samples were obtained for strength and absorption properties. Optimum alkaline agent ratios and NaOH molarity were obtained from analysis of the experimental data using response surface method. Test results indicate that the increment in the Na2SiO3/NaOH ratio up to an optimum value increases the strength and decreases water absorption of LWGM. The increment in NaOH concentration from 8 to 14 M increases the strength and decreases the workability and water absorption of LWGM. The strength of GGBFS-based LWGM with different NaOH concentrations and Na2SiO3/NaOH ratio is greater than that of FA-based GPLWM.
机译：本文介绍了不同浓度的氢氧化钠（NaOH）和硅酸钠与氢氧化钠（Na2SiO3 / NaOH）的比例对轻质地质聚合物砂浆（LWGM）的新鲜和某些硬化性能的影响。 LWGM的主要成分是轻质浮石骨料，碎石灰石骨料和碱活化的FA或GGBFS。根据LWGM的可加工性，新鲜单位重量，吸收和强度的变化测试了上述参数的有效性。固化参数取自作者先前的研究。碱性活化剂是8、10、12和14摩尔（M）的NaOH溶液和Na2SiO3的混合物，其比例为1：0.5、1：1、1：1.5、1：2和1：2.5。碱性溶液与粘合剂的比例为0.50。采用全因子实验程序观察LWGM的强度发展，吸水率和吸水性。因此，获得了强度和吸收性能的256个数据样本。通过使用响应面法对实验数据进行分析，可获得最佳的碱性试剂比例和NaOH摩尔浓度。测试结果表明，Na2SiO3 / NaOH比值的增加达到最佳值会增加LWGM的强度并降低其吸水率。 NaOH浓度从8到14 M的增加会增加强度，并降低LWGM的可加工性和吸水性。具有不同NaOH浓度和Na2SiO3 / NaOH比的基于GGBFS的LWGM的强度大于基于FA的GPLWM的强度。

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