Utilization of desert sand in the production of sustainable cement-based materials: A critical review

Zhang, Minghu; Zhu, Xuezhen; Shi, Jinyan; Liu, Baoju; He, Zhihai; Liang, Chaofeng

doi:10.1016/j.conbuildmat.2022.127014

Cited by 50 publications

(14 citation statements)

References 100 publications

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“…However, it has a range of granule sizes, high silica content (55-85%), and lesser adhesion; these properties may be used for the strength enhancement of geopolymers and make it an ideal material to be utilized as an aggregate or filler by customizing its granularity [27]. It is currently being used in research studies on cement-based mortars and concrete [28,29]. Recent research has highlighted the under-addressed features and challenges regarding the utilization of DS in geopolymers [27].…”

Section: Introductionmentioning

confidence: 99%

Enhancing Strength and Quantifying Sustainability of Building Blocks Manufactured by Geopolymerization

Mawra,

Rashid,

Irfan-ul-Hassan

et al. 2024

Materials

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Enhancing the strength of fly ash (FA)-based geopolymer by increasing the alkaline activator content is a costly and unsustainable technique. Therefore, this work was designed to reduce the activator by employing the pressured catalysis (PC) technique, coupled with the use of minerals that have filler and occupying effects. The main objective was to enhance the strength of the mix with a lower alkaline-to-precursor (A/P) ratio and create a sustainable, load-bearing building block from it. Initially, the compressive strength of the FA-based geopolymer was investigated experimentally by varying sodium silicate to sodium hydroxide and A/P ratios with ambient and hot curing. Afterward, PC was applied to the optimized proportion of constituents, and a significant increase in strength (9.6 to 20.0 Mpa) was observed at a 0.25 A/P ratio. By adding clay and dune sand (DS), the compressive strength was 19.5 and 40.4 Mpa at an A/P of 0.25 and 0.16, respectively. The strength gain mechanism was evaluated at the molecular and micro levels by conducting FTIR and SEM analyses. The environmental and economic indices and strength indicated the high sustainability of DS-based geopolymers compared to analogous blocks. The environmental and economic benefits of 23.9% reduced CO2 emissions and 24.2% less cost were provided by the DS-based block compared to the FA–clay-based block. A DS-based geopolymer obtains strength at a low A/P due to its occupying effect and results in sustainable building blocks.

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Section: Introductionmentioning

confidence: 99%

Enhancing Strength and Quantifying Sustainability of Building Blocks Manufactured by Geopolymerization

Mawra,

Rashid,

Irfan-ul-Hassan

et al. 2024

Materials

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“…The issue is particularly severe in Northwest China and is hindering sustainable development [23]. Aeolian sand (AS) is a hazard and a resource, which has the advantages of large reserves and low prices [24]. In today's advocacy of local conditions, and local materials, if we can apply AS to project projects, it will not only inhibit desertification and reduce the losses caused by desertification but also promote the alternative use of sand sources, which is conducive to protecting the environment [25,26].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Shear Mechanical Properties of Fractured Rock Mass Reinforced by Aeolian-Sand (AS) Cement Mortar after Freeze-Thaw (F-T) Cycles

Liu,

Chen,

Zhang

et al. 2024

Preprint

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The rock joint fissure slope in cold regions is prone to deformation and failure problems such as relaxation, tension and collapse under freeze-thaw (F-T) cycles. Based on the ideology of clean production and promoting the structural integrity of geotechnical projects in cold areas, this study designed and prepared aeolian-sand (AS) to replace part of river sand as a filling mortar material by taking advantage of the low cost and easy availability of AS. Investigations were carried out to determine the impact of varying proportions of AS in mortar on the microstructure and shear properties of the mortar-rock interface under F-T cycles. Therefore, F-T cycle testing, nuclear magnetic resonance (NMR) testing and shear testing were carried out on grout with different proportions of AS. The results show that the right proportion of AS replacement could enhance the shear deformation resistance and F-T resistance of the mortar-rock interface, and 30% proportion is the optimal proportion. By increasing of F-T cycles, the three types of specimens showed different degrees of particle spalling, shedding and cracking. The slurry-rock interface layer in the A (0%) group exhibited the most severe F-T deterioration, while the B (15%) group showed a lesser degree, and the C (30%) group performed the best. T2 spectrum curve and total spectrum area change law from the microscopic point of view to verify the 30% AS proportion mortar-rock interface F-T resistance is the strongest, followed by 15% AS proportion mortar, the weakest is ordinary mortar. The degradation of the mortar-rock bond is primarily due to the conversion of solid to liquid phases and the movement of internal water caused by fluctuating temperatures. The extent of F-T deterioration in the slurry-rock interface layer is greatly affected by the varying proportions of AS. The shear strength and shear stiffness of specific proportion of AS decreased with the increase of F-T cycles. For same F-T cycles, the shear strength and shear stiffness of group C (30%) were the highest, followed by group B (15%) and group A (0%). The grout material not only reinforces the F-T joint fissure slope, but also reduces the cost of grout reinforcement and promotes the clean production of geotechnical structures.

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“…Thus, its amorphous silica content, fineness, amount of alumina, and calcium are the key parameters of precursors that influence the strength of the resultant geopolymer (Zafar et al 2022b(Zafar et al , 2022c. Since the coarser particles may occupy the space, dense crystalline particles of uniformly sized DS provide adequate environment for activation of FA by pressure casting (Li et al 2020;Zhang et al 2022). DS was potentially used to develop geopolymer mortar (Chuah et al 2016;Li et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Developing High-Strength Geopolymer using Least Activator and Pressure-Applied Casting: Techno-Enviro-Economic Performance

Rashid,

Masud

2024

ACT

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Utilization of desert sand in the production of sustainable cement-based materials: A critical review

Cited by 50 publications

References 100 publications

Enhancing Strength and Quantifying Sustainability of Building Blocks Manufactured by Geopolymerization

Enhancing Strength and Quantifying Sustainability of Building Blocks Manufactured by Geopolymerization

Microstructure and Shear Mechanical Properties of Fractured Rock Mass Reinforced by Aeolian-Sand (AS) Cement Mortar after Freeze-Thaw (F-T) Cycles

Developing High-Strength Geopolymer using Least Activator and Pressure-Applied Casting: Techno-Enviro-Economic Performance

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