Use of zeolite rocks for ceramic bricks based on brick clays and clay loams with high drying sensitivity

Вакалова, Т. В.; Revva, I. B.

doi:10.1016/j.conbuildmat.2020.119324

Cited by 24 publications

(13 citation statements)

References 42 publications

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“…Similar trends of increased tuff percentage with decreased density and compressive strength have been observed in other studies [20,22,35] as evidenced in Table 6. Gencel et al [22] and Cay et al [35], from samples of very similar densities and manufactured by the semi-dry pressing process, obtained values of compressive strength, for samples with up to 30% tuff, greater than the minimum value required by national regulations.…”

Section: Compressive Strengthsupporting

confidence: 89%

“…The linear shrinkage of samples increased as more tuff was added, but even so, it was considerably lower than in the case of the control sample (S0) (Figure 7). At temperatures < 1000 • C the shrinkage was less than 1% for all samples, lower, by a factor of three, than other authors findings [20]. The numerical value of the measured shrinkages is presented in Table 4.…”

Section: Shrinkagementioning

confidence: 53%

“…Tuff was used as an additive in clay matrices, in various percentages, by weight, as a humidity control [20]. The role of natural zeolites content in a clay matrix was investigated by the authors [21], showing that the thermal conductivity of fired bricks had been reduced.…”

Section: Introductionmentioning

confidence: 99%

“…Most of the papers dealing with the use of volcanic tuff in the building industry concern the incorporation of tuffs in cement or geopolymers [23] for use as building materials. The literature reveals a limited number of papers concerned with the incorporation of tuff in fired clay bricks [20][21][22]. Dej Tuff is the most prominent acidic tuff of the whole Carpathian-Pannonian area, and its geographical localization is the northwestern and northern border of the Transylvanian Basin.…”

Section: Introductionmentioning

confidence: 99%

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Volcanic Tuff as Secondary Raw Material in the Production of Clay Bricks

et al. 2021

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The present work examines an innovative manufacturing technique for fired clay bricks, using tuff as a secondary raw material. Samples were made of clay and tuff (0–30 wt.%) fired at 900 to 1100 °C. The chemical and mineralogical compositions and physical and thermal analyses of raw materials were investigated by using SEM-EDS, RX and DTA-TG curves. The samples were analysed from the mineralogical, technological and mechanical points of view. The result show that the tuff’s presence in the clay mixtures considerably reduced the shrinkage of the product during the firing process, and the manufactured samples were of excellent quality. The compressive strength of the bricks varied from 5–35.3MPa, being influenced by the tuff content, clay matrix properties and firing temperatures. Finally, the heat demand for increasing the temperature from room to the firing temperature of the sample with 10% tuff content was 22%.

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Section: Compressive Strengthsupporting

confidence: 89%

Section: Shrinkagementioning

confidence: 53%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Volcanic Tuff as Secondary Raw Material in the Production of Clay Bricks

et al. 2021

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“…Iron oxide (Fe 2 O 3 ) gives a reddish colour to the ceramic products for masonry (Dondi et al , 2014; Pardo et al , 2018). The Fe 2 O 3 and TiO 2 , which are chromophore oxides (Vakalova & Revva, 2020), correspond to 2.5–7.0% of the clay samples and 10% of the argillites. The alkaline and alkaline earth oxides (CaO, MgO, K 2 O and Na 2 O) facilitate sintering of the ceramic materials (Tsozué et al , 2017), as they are mineralizers.…”

Section: Resultsmentioning

confidence: 99%

Characterization and use of clays and argillites from the south of Santa Catarina State, Brazil, for the manufacture of clay ceramics

et al. 2020

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Six clays from various deposits were studied for their use in the production of structural clay products. The clays were characterized using chemical (X-ray fluorescence), mineralogical (X-ray diffraction) and thermal (differential scanning calorimetry/thermogravimetry) analyses. Particle-size distribution was determined by laser diffraction, plasticity by the Pfefferkorn method and the residue by the sieve-size method. Next, specimens were formed by extrusion and characterized by their linear thermal shrinkage (on drying and firing), water absorption, bulk density, porosity and compressive strength. The clays were, in general, suitable for the manufacture of structural ceramics, mainly bricks. The clays from flooded pits (AV1 and AV2) were classified as floodplain clays and alluvial clays. The clays mined in mountainous regions (AM1 and AM2, as well as AV1) were characterized as siliceous clays due to the abundance of free SiO2 phases.

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