Green manufacturing of silicate materials using desert sand as a raw-material resource

Shi, Zhiming

doi:10.1016/j.conbuildmat.2022.127539

Cited by 17 publications

(7 citation statements)

References 80 publications

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“…While dune sand (DS) is a rejected sand in the construction industry, its fineness and poor grading are the main barriers to its utilization in concrete and mortar [23][24][25][26]. 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].…”

Section: Introductionmentioning

confidence: 99%

“…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]. Moreover, a huge range of industrial, commercial, and organic wastes have been incorporated with FA to add to its existing properties [30,31].…”

Section: Introductionmentioning

confidence: 99%

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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%

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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“…This fact is mainly due to large construction materials production, the high extraction of raw materials and also the development [3], in most cases, of poorly optimised industrial processes [4]. More specifically, a high percentage of ceramic materials are consumed in construction, causing a scarcity of clay as the essential raw material for the shaping of these products [5]. In addition, in the sintering process developed for the manufacturing of traditional ceramic materials, high temperatures are reached, thus conditioning the use of large percentages of energy [6].…”

Section: Introductionmentioning

confidence: 99%

Factor Analysis of the Physical–Mechanical Properties for Geopolymers Based on Brick Dust and Biomass Bottom Ash as Eco-Friendly Building Materials

Terrones-Saeta,

Luís,

Romero

et al. 2023

Processes

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The production of building materials is unavoidable if the well-being and development of society are to be maintained. However, in manufacturing these materials, significant greenhouse gas emissions and environmental effects are produced. For this reason, and with the aim of reducing the impact of the manufacture of these materials, this work developed a geopolymeric material made up solely of wastes, brick dust and biomass bottom ashes which replaced the traditional ceramic materials. To evaluate the quality of this sustainable geopolymeric material, different groups of specimens were formed with different percentages of both residues, subsequently determining the physical properties of the new-formed geopolymers and guaranteeing they accomplish the prescriptions of the ceramic regulations for construction. In addition, the results of the geopolymer characterisation tests were statistically analysed using factor analysis, with the sole purpose of establishing connections and interdependence between the variables that influence the geopolymerisation process. Thus, it was possible to demonstrate that the combination of brick dust and biomass bottom ashes produced geopolymers with adequate qualities to replace traditional ceramics, as well as that the different combinations of both residues produced feasible materials to be used as ceramics with various characteristics, with two main factors determined by factorial analysis that governed the physical properties of the geopolymer obtained: the percentage of brick dust and the theoretical porosity.

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“…Therefore, the mechanical properties of desert sand concrete (DSC) are very close to those of ordinary concrete, and the desert sand can be used as a fine aggregate in civil engineering concrete to meet the general engineering requirements. However, due to its low fineness modulus, high water requirement and easy cracking, shrinkage and bleeding, the application of desert sand resources is limited [ 11 , 12 , 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties and Microstructure of Polypropylene–Glass-Fiber-Reinforced Desert Sand Concrete

Hou,

Wen,

Huang

et al. 2023

Polymers

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In order to improve the performance of desert sand concrete, polypropylene fiber (PF) and glass fiber (GF) were used to prepare desert sand concrete (DSC) with different fiber and volume content, and the basic mechanical properties, such as cube compressive, tensile and flexural strengths, were tested and studied. Based on the mercury injection method (MIP) and scanning electron microscopy (SEM), the evolution of pore structure and interface structure was analyzed. The mechanism of fiber toughening was revealed at the microscopic level. The results show that the slump of DSC decreases with the increase in fiber content. The slump of glass-fiber-reinforced DSC (GFRDSC) is smaller than that of polypropylene-fiber-reinforced DSC (PFRDSC). The strength enhancement of DSC by fibers is in the order of flexural strength > split tensile strength > compressive strength. The flexural strength of hybrid-fiber-reinforced DSC (HyFRDSC) (0.1% PF + 0.1% GF) is increased by 40.7%. Meanwhile, fibers can improve the toughness of DSC. The MIP results show that the porosity of HyFRDSC decreased by 50.01%, and the addition of fiber can effectively refine the large pore size. The SEM results show that the incorporation of PF and GF causes the formation of a uniform and dense structure between the fibers, cement and aggregate. The two can give full play to the crack-resisting and toughening effect in different loading stages, thus improving the macromechanical properties of DSC.

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Green manufacturing of silicate materials using desert sand as a raw-material resource

Cited by 17 publications

References 80 publications

Enhancing Strength and Quantifying Sustainability of Building Blocks Manufactured by Geopolymerization

Enhancing Strength and Quantifying Sustainability of Building Blocks Manufactured by Geopolymerization

Factor Analysis of the Physical–Mechanical Properties for Geopolymers Based on Brick Dust and Biomass Bottom Ash as Eco-Friendly Building Materials

Mechanical Properties and Microstructure of Polypropylene–Glass-Fiber-Reinforced Desert Sand Concrete

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