Strength performance and life cycle assessment of high-volume low-grade kaolin clay pozzolan concrete: A Ghanaian scenario

Bediako, Mark; Valentini, Luca

doi:10.1016/j.cscm.2022.e01679

Cited by 6 publications

(2 citation statements)

References 30 publications

(35 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The microstructural investigations show that the pressed sample has a composite-like structure with a kaolinite matrix and the filler role is fulfilled by quartz and mullite particles. Such a mineral base is reported in the literature for various sustainable materials such as plasters [43,44] or pozzolan structures for geopolymer production [45,46]. Our microstructural observation evidenced that pressing the slurry with a humidity of around 30% facilitates the kaolinite binder activity, increasing the material cohesion.…”

Section: Discussionsupporting

confidence: 66%

Microstructural Investigations Regarding Sustainable Recycling of Ceramic Slurry Collected from Industrial Waste Waters

Avram,

Barbu Tudoran,

Cuc

et al. 2024

Sustainability

View full text Add to dashboard Cite

Ceramic slurry wastes have a significant hazardous potential when dumped. Their recycling as raw material is a sustainable approach for the development of nature-friendly applications. The microstructure and mechanical properties play a key role in the success of this sustainable recycling. Ceramic slurry samples resulting from the wall and floor tiles production facility were analyzed. The mineral composition was investigated by XRD combined with mineralogical microscopy and the microstructure was investigated by SEM microscopy coupled with EDX spectroscopy and elemental mapping. The ceramic slurry contains: quartz, kaolinite, mullite and small amounts of lepidocrocite. Quartz and mullite particles have sizes in the range of 5–100 μm and kaolinite has small particles of around 1 to 30 μm. Iron hydroxide crystallized as lepidocrocite is finely distributed among kaolinite aggregates. It makes the slurry unable to be reused in the technological process because of the glaze staining risk, but it does not affect the material cohesion. Thus, the cylindrical samples were prepared at progressive compactions rates as follows: 1808.55; 1853.46; 1930.79 and 2181.24 kg/m3 and dried. Thereafter, were subjected to a compression test with a lower compression strength of 0.75 MPa for lower density and a higher strength of 1.36 MPa for the higher density. Thus, slurry compaction enhances the kaolinite binding ability. The Young’s Modulus slightly decreases with the compaction increasing due to local microstructure rigidizing. This proves the binding ability of kaolinite, which properly embeds quartz and mullite particles into a coherent and resistant structure. The fractography analysis reveals that fracture starts on the internal pores at low compaction rates and throughout the kaolinite layer in the samples with high compactness. The observed properties indicate that the investigated ceramic slurry is proper as a clay-based binder for sustainable ecological buildings, avoiding the exploitation of new clay quarries. Also, it might be utilized for ecological brick production.

show abstract

Section: Discussionsupporting

confidence: 66%

Microstructural Investigations Regarding Sustainable Recycling of Ceramic Slurry Collected from Industrial Waste Waters

Avram,

Barbu Tudoran,

Cuc

et al. 2024

Sustainability

View full text Add to dashboard Cite

show abstract

“…This is due to pozzolana's ability to react with calcium hydroxide in the presence of water to generate additional cementitious compounds that improves the strength of the concrete structure and reduces porosity. It is important to note that the estimated amount of pozzolana clay deposits in Ghana varies depending on the source, but some studies suggest that the total resources could be about five hundred million of metric tonnes (Bediako and Valentini, 2022;Asamoah et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Improving the sustainability of oil well cementing operations: blending Portland cement with pozzolana

Amoah,

Asante-Okyere,

Bentil

et al. 2023

JGhIE

View full text Add to dashboard Cite

Cementing is one of the most critical drilling operations in the oil and gas industry. However, the production and utilization of cement is a major emitter of CO2 into the atmosphere. Processes and technologies that can reduce the overall carbon footprint of the oil and gas industry while meeting the increasing global demand for energy are of key interest to stakeholders. Furthermore, local cement when compared with imported class G cement is unable to meet the compressive strength requirement of an oil well cement. Therefore, the objective of the present study is to investigate for the first time the capability of natural pozzolana clay from Ghana as a sustainable alternative to improve the physical and rheological properties of local Portland cement for well cementing operations. Pozzolana is a naturally occurring clay that is mainly composed of silica and alumina. To achieve this, well cementing blends of varying percentages with up to 30 % of pozzolana and 70 % of local Portland cement by mass were formulated and examined to determine their rheological properties, free fluid, and compressive strength. The experimental results indicated that blending natural pozzolana material and local Portland cement effectively reduced the free fluid of local Portland by up to 85 % and the plastic viscosity by up to 62.5 %. Furthermore, the addition of pozzolana significantly increased the compressive strength of local Portland cement by up to 188.5 %. Based on the results, it can be concluded that pozzolana can improve the performance of local Portland oil well cement and further reduce the carbon footprint of the oil and gas extraction process by minimizing the quantity of Portland cement used for well cementing operation.

show abstract

Mechanical and Durability Performance of Concrete Containing Calcined Excavated London Clay

Dhandapani,

Subramanian,

Black

et al. 2024

Lecture Notes in Civil Engineering

View full text Add to dashboard Cite

Strength performance and life cycle assessment of high-volume low-grade kaolin clay pozzolan concrete: A Ghanaian scenario

Cited by 6 publications

References 30 publications

Microstructural Investigations Regarding Sustainable Recycling of Ceramic Slurry Collected from Industrial Waste Waters

Microstructural Investigations Regarding Sustainable Recycling of Ceramic Slurry Collected from Industrial Waste Waters

Improving the sustainability of oil well cementing operations: blending Portland cement with pozzolana

Mechanical and Durability Performance of Concrete Containing Calcined Excavated London Clay

Contact Info

Product

Resources

About