Sustainable use of silica fume in green cement concrete production: a review

Chishi, Abotoli K.; Gautam, Lilesh

doi:10.1007/s41062-023-01164-z

Cited by 4 publications

(1 citation statement)

References 52 publications

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“…The GGBS slag activity index recorded was 62% after seven days and 108% after twenty-eight days. The slag composition must include at least two-thirds of the total mass of CaO, MgO, and SiO2, with the remainder primarily comprising Al2O3 and a few other oxides [31,32]. The mass ratio of (CaO + MgO) to SiO2 should exceed 1.0 [33,34].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Alkali-Activated Mortar Incorporating Combined and Uncombined Fly Ash and GGBS Enhanced with Nano Alumina

Ali

2024

Civ Eng J

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The present research focuses on assessing the fresh and hardened properties as well as the durability performance of alkali-activated mortar in an ambient environment and the impact of integrating nano-alumina (NA) at a 2% ratio as a substitute for binder materials in alkali-activated mortar (AAM). Additionally, it assesses the effectiveness of alkali-activated mortar employing different blends of ground granulated blast furnace slag (GGBS) and fly ash as environmentally friendly substitute building materials. Fly ash (FA), ground granulated blast slag (GGBS), and an equal mixture of GGBS and FA make up these binder ingredients. As a result, the main binders contain GGBS, FA, or a 50/50 mixture of GGBS and FA. The sodium hydroxide (NaOH) concentration is fixed at a 12-molarity level, and the alkali activator solution to binder ratio is kept at 0.5. In the alkali solution, the ratio of sodium silicate to sodium hydroxide is always 2.5. The study evaluates various properties of AAM, such as compressive strength, flowability, unit weight, flexural tensile strength, and durability, under ambient conditions at a steady room temperature of 23±3°C. Results indicate that AAM mixtures devoid of NA exhibit a higher flow rate compared to those containing NA. Nonetheless, the flowability of AAM mixtures aligns well with standard requirements, being modest yet adequate. Significantly, the inclusion of NA enhances the mechanical properties and durability of AAM, demonstrating its beneficial effects. Doi: 10.28991/CEJ-2024-010-03-016 Full Text: PDF

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