Possibility of using Kütahya Volcanic Tuff as building stone: Microstructural evaluation and strength enhancement through heat treatment

Toprak, Mehmet Uğur; Arslanbaba, Mehmet Ali

doi:10.1016/j.conbuildmat.2016.02.024

Cited by 11 publications

(2 citation statements)

References 23 publications

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“…The high plasticity of halloysite should be corrected by the addition of quartz to avoid crack development during drying. Furthermore, quartz is a filler which controls deformation and shrinkage of the fired bodies, whereas K-feldspar acts as a flux that forms a quasi-liquid phase which affects the densification process during firing (Toprak & Arslanbaba, 2016). Moreover, the flux interacts with halloysite, which contributes to the plasticity during the shaping of the ceramic body and yields mullite and glass during firing (Carty & Senapati 1998; Iqbal & Lee, 2000; Martín-Márquez et al, 2010), thereby affecting the microstructural features and physical properties of the fired bodies (Pagani et al, 2010).…”

Section: Discussionmentioning

confidence: 99%

Characterization of halloysite (North East Rif, Morocco): evaluation of its suitability for the ceramics industry

et al. 2018

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A halloysite clay from Nador (NE Morocco) was studied to evaluate its suitability in the ceramics industry. A cross-section involving all the Messinian facies was performed in the Melilla Neogene basin, at the foot of the Gourougou volcano, to establish the origin of the halloysite and estimate its reserves. White layers of halloysite and red clays rich in smectite occurring in contact with basal-reef limestone were characterized by mineralogical (XRD, IR), textural (SEM) and physico-chemical analyses (grain-size, Atterberg limits, DTA/TG, XRF and specific surface area). Ceramic properties were evaluated for halloysite fired from 500 to 1100°C to evaluate technical processing for ceramic production.The halloysite clay consists of fine particles with a high plasticity and a large specific surface area. The XRD investigation revealed the presence of 7 Å non-hydrated halloysite along with gibbsite, alunite, K-feldspar and traces of smectite and illite.The presence of halloysite was confirmed from the characteristic IR bands at 3695 and 3618 cm−1and the predominance of tubular crystals observed in the SEM. The chemical analysis revealed high contents linked to the presence of Al-rich phases (gibbsite and alunite). DTA/TG and XRD results of fired clay samples proved the dehydroxylation of halloysite and a rearrangement of metakaolinite to form mullite and spinel at 975°C.The Moroccan halloysite might be suitable for refractory ceramic applications. However, addition of quartz sand might be necessary to avoid crack development during firing and to reduce the plasticity of raw halloysite and minimize shrinkage during sintering.

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Section: Discussionmentioning

confidence: 99%

Characterization of halloysite (North East Rif, Morocco): evaluation of its suitability for the ceramics industry

et al. 2018

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“…Tuff, a pyroclastic rock of consolidated volcanic ash origin, is sometimes called tufa or ashstone, particularly when used as construction material, although tufa also refers to a quite different rock. Rock that contains greater than 50 % tuff is considered tuffaceous [14,15,16,17]. Its highly vesicular but compacted and consolidated structure gives it a higher strength.…”

Section: Figure 1 -The Model Of Masonry Unitmentioning

confidence: 99%

Lightweight Cellular Hollow Concrete Blocks Containing Volcanic Tuff Powder, Expanded Clay and Diatomite for Non-Load Bearing Walls

Gündüz

KALKAN

2020

Teknik Dergi

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Lightweight cellular hollow concrete (LCHC) block is a type of masonry unit manufactured by precast technique. LCHC blocks are produced by the mixing of Portland cement, volcanic tuff, expanded clay and diatomite for building applications. LCHC blocks are lightweight and being frequent cellular hollow cleavages, give excellent thermal and acoustic performance, fire resistance and high weathering resistance to the buildings. In this research work, LCHC blocks with 28 different mix proportions were cast into a mould with vibrocompacting, de-moulded immediately and transferred to a storage area for curing up to 120 days in standard air condition at room temperature. In total, 21 cellular spaces of 10 mm width were placed in the block design. For each mixture, twenty four block specimens were prepared and tested in the air dry condition for compressive strength and water absorption in accordance with BS 1881: Part 116. This paper initially examines how volcanic tuff powder affects the characteristics of lightweight concrete masonry mixtures and investigates the use of quaternary blends containing volcanic tuff, expanded clay, diatomite and Portland cement to produce LCHC blocks for partitioning walls.

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Using volcanic tuff wastes instead of feldspar in ceramic tile production

Akpinar

Anlı²

2023

J Mater Cycles Waste Manag

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Possibility of using Kütahya Volcanic Tuff as building stone: Microstructural evaluation and strength enhancement through heat treatment

Cited by 11 publications

References 23 publications

Characterization of halloysite (North East Rif, Morocco): evaluation of its suitability for the ceramics industry

Characterization of halloysite (North East Rif, Morocco): evaluation of its suitability for the ceramics industry

Lightweight Cellular Hollow Concrete Blocks Containing Volcanic Tuff Powder, Expanded Clay and Diatomite for Non-Load Bearing Walls

Using volcanic tuff wastes instead of feldspar in ceramic tile production

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