This paper studies the effect of various red mud proportions on the strength and microstructural changes in the ferrosialate geopolymer mortar. The optimum percentage of red mud (RM) has to be found with respect to the molarity of Sodium hydroxide (NaOH) to maintain the suitable alkalinity of the mixture for maximum strength gain. This percentage has been found to be between 20 and 30% RM proportions. From XRD micrographs, it has been found that the crystallinity percentage increased with the increase in red mud content. For oven-cured samples, SEM images showed that, till the red mud replacement reaches 20%, any increase in the red mud leads to denser microstructure and a decrease in intensity of unreactive particles. Beyond that, samples displayed a higher number of undissolved phases. Whereas, for ambientcuring specimens, this limit is found to be 30%. Synergy has to be found among the red mud content, curing type and curing temperature for optimum results. Ferrosialate geopolymer samples has shown 53.34% higher maximum compressive strength than sialate geopolymer samples. The oxide ratios of SiO 2 /Al 2 O 3 = 4.0 to 4.3, Na 2 O/SiO 2 = 0.15 to 0.17 and Fe 2 O 3 /Al 2 O 3 = 0.27 to 0.37 have found to be limits for favouring maximum strength gain.
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机译:本文研究了各种红泥比例对铁肌肉岩土聚合物研钵强度和微观结构变化的影响。对于氢氧化钠(NaOH)的摩尔,必须找到红色泥浆(RM)的最佳百分比,以保持混合物的合适碱度以获得最大强度增益。已发现此百分比在20至30%的RM比例之间。从XRD显微照片中发现,随着红泥含量的增加,结晶度百分比增加。对于烘箱固化的样品,SEM图像显示,直到红泥浆替换达到20%,红色泥浆的任何增加都会导致更密集的微观结构和不反应颗粒强度的降低。除此之外,样本显示出更高数量的未溶解阶段。虽然,对于余下的标本,发现该限制为30%。 Synergy必须在红泥含量,固化型和固化温度中找到,以获得最佳结果。脱肌肉产物样品的最大抗压强度比唾液酸盐缘多元化物样品更高的53.34%。 SiO 2 / Al 2 O 3 = 4.0至4.3,Na 2 O / SiO 2 = 0.15至0.17和Fe 2 O 3 / Al 2 O 3 = 0.27至0.37的氧化物比已发现是有利于最大强度增益的限制。
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