A low environmental impact admixture for the elaboration of unfired clay building bricks

Jiménez-García, E. de J.; Arellano-Vazquez, D.A.; Titotto, S.; Vilchis-Nestor, A.R.; Mayorga, M.; Romero-Salazar, L.; Arteaga-Arcos, J.C

doi:10.1016/j.conbuildmat.2023.133470

Cited by 4 publications

(2 citation statements)

References 32 publications

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“…Traditional sintered bricks have the disadvantages of high energy consumption and substandard carbon emissions. To transform sintered bricks for energy saving and consumption reduction, some scholars have conducted relevant research on the green transformation of traditional sintered wall materials, focusing on the development of clay-free, energy-saving, carbon-reducing, eco-friendly, sinter-free new wall materials [ 25 , 26 , 27 , 28 , 29 ]. Several studies have demonstrated that industrial by-products can be used to produce unfired bricks, which have remarkable strength and durability due to the formation of cementing compounds such as hydrated calcium silicate (C-S-H) and hydrated calcium silicate aluminate (C-S-A-H) gels [ 18 , 30 ].…”

Section: Introductionmentioning

confidence: 99%

Mechanism of Strength Formation of Unfired Bricks Composed of Aeolian Sand–Loess Composite

Liu,

Guo,

Zhang

et al. 2024

Materials

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Aeolian sand and loess are both natural materials with poor engineering-related properties, and no research has been devoted to exploring aeolian sand–loess composite materials. In this study, we used aeolian sand and loess as the main raw materials to prepare unfired bricks by using the pressing method, along with cement, fly ash, and polypropylene fiber. The effects of different preparation conditions on the physical properties of the unfired bricks were investigated based on compressive strength, water absorption, and softening tests and a freeze–thaw cycle test combined with X-ray diffraction and scanning electron microscope analysis to determine the optimal mixing ratio for unfired bricks, and finally, the effects of fibers on the durability of the unfired bricks were investigated. The results reveal that the optimal mixing ratio of the masses of aeolian sand–loess –cement –fly ash–polypropylene fiber–alkali activator–water was 56.10:28.05:9.17:2.40:0.4:0.003:4.24 under a forming pressure of 20 MPa. The composite unfired bricks prepared had a compressive strength of 14.5 MPa at 14 d, with a rate of water absorption of 8.8%, coefficient of softening of 0.92, and rates of the losses of frozen strength and mass of 15.93% and 1.06%, respectively, where these satisfied the requirements of environmentally protective bricks with strength grades of MU10–MU15. During the curing process, silicate and sodium silicate gels tightly connected the particles of aeolian sand and the loess skeleton, and the spatial network formed by the addition of the fibers inhibited the deformation of soil and improved the strength of the unfired bricks.

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Section: Introductionmentioning

confidence: 99%

Mechanism of Strength Formation of Unfired Bricks Composed of Aeolian Sand–Loess Composite

Liu,

Guo,

Zhang

et al. 2024

Materials

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“…Generally, fly ash contains aluminum oxides, quartz and various salts. This inorganic solid waste containing silicates and aluminates, fusible at high temperatures, can be the source of the formation of complex aluminosilicates in bricks [22][23][24][25]. The brick production process with waste materials is similar to traditional brick-making procedures.…”

Section: Introductionmentioning

confidence: 99%

Thermal Behavior of Ceramic Bodies Based on Fly Ash and Smectites

Plevová,

Vaculíková

2024

Minerals

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Clay minerals have a great influence on the resulting properties of ceramic bodies. Fly ash as a waste material from burning black coal in power plants is a potentially valuable source of oxides (Al2O3, SiO2 or Fe2O3) for this production. Considering the process of ceramic firing, it is important to understand the thermal behavior of individual ingredients. The thermal behavior of natural smectite minerals (montmorillonite, beidellite, hectorite and nontronite) and their mixtures with added fly ash at different ratios (10%, 30% and 50%) was investigated. The phase analysis was obtained using X-ray diffraction and FT-IR spectroscopy. Under heating to 1200 °C, the structural changes of smectites were divided into four steps including dehydration, dehydroxylation, decomposition and crystallization of new phases. The addition of fly ash caused a shift in the reaction temperatures for all the mentioned phases. These changes were most noticeable for mixtures with hectorite; on the contrary, they were least noticeable for beidellite mixtures. Total mixture mass loss continually decreased with increasing fly ash amount. The obtained experimental thermal data can be applicable not only in the production of ceramic bodies or energy waste processing but also in construction and ensuring the safety of municipal waste landfills.

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Raw material design, sintering temperature optimization and development mechanism investigation of self-foaming porous bricks with high solid waste addition

Yu,

Shen,

Zhang

et al. 2024

Chemical Engineering Journal

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A low environmental impact admixture for the elaboration of unfired clay building bricks

Cited by 4 publications

References 32 publications

Mechanism of Strength Formation of Unfired Bricks Composed of Aeolian Sand–Loess Composite

Mechanism of Strength Formation of Unfired Bricks Composed of Aeolian Sand–Loess Composite

Thermal Behavior of Ceramic Bodies Based on Fly Ash and Smectites

Raw material design, sintering temperature optimization and development mechanism investigation of self-foaming porous bricks with high solid waste addition

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