Influence of nano titanium dioxide on strength and durability of ambient-cured GGBS-based geopolymer concrete

IF 7.9 Q1 ENGINEERING, MULTIDISCIPLINARY
A. Ravi Theja , M. Sivaramakrishnaiah , K․V․S․Gopala Krishna Sastry , C. Sashidhar , Prabhu Paramasivam , Praveen Kumar Kanti , Abinet Gosaye Ayani
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Abstract

This study investigates the impact of nano titanium dioxide (nano TiO₂) on the mechanical and durability performance of geopolymer concrete (GPC) produced using ground granulated blast furnace slag (GGBS) and ambient curing conditions. Sodium hydroxide (10 M) and sodium silicate were used as alkaline activators at varying ratios to determine the optimal mix design, with the best compressive strength observed at a Na₂SiO₃/NaOH ratio of 2.5. Nano TiO₂ was then incorporated into the GPC in varying dosages from 1 % to 5 % by weight of GGBS. Compressive, flexural, and splitting tensile strength tests were conducted, along with rapid chloride permeability, water absorption, sorptivity, and resistance to sulfate and chloride attacks. Microstructural properties were assessed using SEM, EDS, TGA/DSC, and FTIR analyses. The optimal nano TiO₂ content was found to be 3 %, which led to a 21.5 % improvement in compressive strength and enhanced durability, with lower permeability and porosity compared to the control mix. Beyond 3 %, performance declined due to nanoparticle agglomeration and microcracking. The results demonstrate that nano TiO₂ can significantly enhance the performance of ambient-cured GGBS-based geopolymer concrete when used within optimal limits.
纳米二氧化钛对环境固化ggbs基地聚合物混凝土强度和耐久性的影响
本文研究了纳米二氧化钛(纳米TiO 2)对用矿渣粉(GGBS)和环境养护条件制备的地聚合物混凝土(GPC)力学性能和耐久性的影响。以氢氧化钠(10 M)和硅酸钠作为不同比例的碱性活化剂,确定了最佳的组合设计,其中Na₂SiO₃/NaOH比为2.5时抗压强度最佳。然后将纳米tio2以GGBS重量的1%至5%的不同剂量掺入GPC中。进行了压缩、弯曲和劈裂拉伸强度试验,以及快速氯化物渗透性、吸水性、吸附性和抗硫酸盐和氯化物侵蚀性试验。采用SEM, EDS, TGA/DSC和FTIR分析对其微观结构性能进行了评估。纳米tio2的最佳含量为3%,与对照混合物相比,抗压强度提高21.5%,耐久性增强,渗透率和孔隙率降低。超过3%,由于纳米颗粒团聚和微裂,性能下降。结果表明,在最佳使用范围内,纳米tio2可以显著提高环境固化ggbs基地聚合物混凝土的性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Results in Engineering
Results in Engineering Engineering-Engineering (all)
CiteScore
5.80
自引率
34.00%
发文量
441
审稿时长
47 days
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