Preparation, characteristics and mechanisms of the composite sintered bricks produced from shale, sewage sludge, coal gangue powder and iron ore tailings

Luo, Liqun; Li, Keyao; Fu, Weng; Liu, Cheng; Yang, Siyuan

doi:10.1016/j.conbuildmat.2019.117250

Cited by 100 publications

(31 citation statements)

References 38 publications

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“…In g. 5b showed the manufactured brick with OB and cement at optimum temperature 110± 100C, the degree of melting and consolidation of the bricks was comparatively high in atted section, its leads to the solid construction. The gure 5b showed very small and dispersed capillary pore as well as the cementing of the liquid phase; its help to enhance the CS whereas reducing WA percentage of the bricks (Luo et al 2020).…”

Section: Relation Between Water Absorption and Compressive Strengthmentioning

confidence: 98%

Manufacturing of Bricks From Coal Mine Overburden Dump of Korba, Chhattisgarh, India

Singh¹,

Singh²

2020

Preprint

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Mixing coal mine overburden with sodium silicate and cement, for manufacturing bricks was studied with the objective of converting the coal mine overburden waste into value-added products. Bricks were prepared using different compositions of coal mine overburden with proportions of sodium silicate and Ordinary Portland Cement (OPC), in cuboid mould (9″ X 5″X 3″). Bricks were air dried for 24 hours, placed in oven for 115 ± 10 °C for 24 hours. Characterization of tailings and manufactured bricks were done. Mechanical properties such as compressive strength (CS), water absorption (WA), loss on ignition (LoI) and efflorescence were measured. The maximum CS of 9.5 N/mm2 was recorded for brick having overburden to cement ratio of 8:2. However, for making it more economical the ratio of 9:1 was considered and this compares very well cost with full filed the Indian standard (IS): 3495 (Part 1) (1992) of bricks. The results also indicated that the overburden percentage in the bricks affect their mechanical properties. The WA rates of the manufactured bricks are low compared to standard conventional clay bricks, and the same varies with process parameters. The low capillary pore may deter the formation of efflorescence. The process, with standardized parameters, may be commercially adapted, and large quantities of coal mine overburden may be put to use in making bricks. Thus, the process technology observed in this paper can potentially convert the huge amount of environmentally hazardous waste into value added product. Coal mine overburden may materialize as a sustainable supplement to conventional clay, use of which in brick making is totally restricted. The finding also usher a new area of research.

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Section: Relation Between Water Absorption and Compressive Strengthmentioning

confidence: 98%

Manufacturing of Bricks From Coal Mine Overburden Dump of Korba, Chhattisgarh, India

Singh¹,

Singh²

2020

Preprint

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“…e diffraction peak of CH of CITP15 is slightly stronger than the CITP0 sample. e introduction of ITP promoted the hydration of cement particles and generated more hydration crystals [34]. While the reactivity of ITP was lower as compared to the cement.…”

Section: Xrdmentioning

confidence: 98%

The Role of Iron Tailing Powder in Ultra‐High‐Strength Concrete Subjected to Elevated Temperatures

Huang

Zhang

et al. 2021

Advances in Civil Engineering

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Iron tailing powder (ITP) is considered to have the potential to replace cement to manufacture ultra-high-performance concrete (UHPC). However, the performance of UHPC with the addition of ITP after exposure to high temperatures is more complex. This investigation prepares seven UHPC formulations by introducing different contents of ITP and investigates the mechanical behavior (residual strength), bound water content, and microstructural properties (crystalline and amorphous phases, chemical structure, and morphology) of UHPC subjected to elevated temperatures. The experimental results show that the addition of ITP postpones the spalling of concrete when exposed to high temperatures. The concrete incorporating 15% ITP maintains 53.8% of its original strength at 800°C, unlike the concrete without ITP that maintains 31.6% of its original strength. The addition of ITP increases the number of micropores/cracks in concrete and helps release the vapor pressure caused by water evaporation. The findings of this investigation highlight the potential application of ITP for future UHPC design and manufacture.

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“…However, the traditional method of making sintered brick destroys land and consumes resources. Therefore, some experts and scholars have studied the use of coal gangue, fly ash, red mud, gold mine tailings, iron ore tailings and other raw materials to prepare sintered brick [10][11][12][13][14], thus realizing the comprehensive utilization of solid waste. The three raw materials used in this study are all solid wastes, and the preparation process will not cause harm to the surrounding environment.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Sintered Brick with Aluminum Dross and Optimization of Process Parameters

Wang

et al. 2021

Coatings

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Aluminum dross is produced in the process of industrial production and regeneration of aluminum. Currently, the main way to deal with aluminum dross is stacking and landfilling, which aggravates environmental pollution and resource waste. In order to find a green and environmental protection method for the comprehensive utilization, the aluminum dross was used as raw materials to prepare sintered brick. Firstly, the raw material ratio, molding pressure and sintering process were determined by single factor test and orthogonal test, and the mechanism of obvious change of mechanical strength of sintered brick was studied by XRD and SEM. The experimental results show that, the optimal formula of sintered brick is 50% aluminum dross, 37.50% engineering soil and 12.50% coal gangue. The optimum process parameters are molding pressure 10 MPa, heating rate 8 °C/ min, sintering temperature 800 °C, holding time 60 min. The samples prepared under the above formula and process parameters present outstanding performance, and the compressive strength, flexural strength and water absorption rate are 16.21 MPa, 3.42 MPa and 17.12% respectively.

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Preparation, characteristics and mechanisms of the composite sintered bricks produced from shale, sewage sludge, coal gangue powder and iron ore tailings

Cited by 100 publications

References 38 publications

Manufacturing of Bricks From Coal Mine Overburden Dump of Korba, Chhattisgarh, India

Manufacturing of Bricks From Coal Mine Overburden Dump of Korba, Chhattisgarh, India

The Role of Iron Tailing Powder in Ultra‐High‐Strength Concrete Subjected to Elevated Temperatures

Preparation of Sintered Brick with Aluminum Dross and Optimization of Process Parameters

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