Study on the Activity of Metakaolin Produced by Traditional Rotary Kiln in China

Cao, Rongchuan; Fang, Zheng; Mao, Jin; Shang, Yan

doi:10.3390/min12030365

Cited by 8 publications

(3 citation statements)

References 18 publications

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“…The response surface plots indicate combined effects of two factors on response Figs. 3,4,5,6,7,8,9,10,11,12,13.…”

Section: Slump Flowmentioning

confidence: 99%

“…Cement is a vital part of infrastructural construction activities and produces significant economic impact. According to reports worldwide approximately production of cement is three billion tons every year 3 . Therefore, the cement industry is facing exceptional challenges due to production of Ordinary Portland Cement (OPC) related to climatic changes as well as ailing economy of world in recent times.…”

Section: Introductionmentioning

confidence: 99%

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Enhancing sustainability in self-compacting concrete by optimizing blended supplementary cementitious materials

Aziz,

Mehboob,

Tayyab

et al. 2024

Sci Rep

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Within concrete engineering, the uptake of self-compacting concrete (SCC) represents a notable trend, delivering improved workability and placement efficiency. However, challenges persist, notably in achieving optimal performance while mitigating environmental impacts, particularly in cement consumption. However, simply reducing the cement content in the mix design can directly compromise the structural-concrete requirements. Towards these challenges, global trends emphasize the utilization of appropriate waste materials in blended concrete. This study explored a promising strategy by integrating supplementary cementitious materials (SCMs) to contribute to the United Nations' Sustainable Development Goals (SDGs) in addition to the engineering contributions. It suggests an optimal combination of Metakaolin (MK) and Limestone Powder (LP) to partially substitute cement. The research methodology employs the response surface method (RSM) to systematically explore the ideal ingredient ratios. Through a comprehensive analysis of orthogonal array of 16 mixes, encompassing both mixture and process variables, this study aims to explain the effects of MK and LP addition on the rheological and mechanical properties of SCC with varying cement replacement levels. In terms of mixture constituents, the total composition of cement, MK, and LP was fixed at 100%, while coarse aggregate (CA), fine aggregate (FA), and the water-to-binder ratio were held as process variables. In order to assess the rheological properties of the mix-design, various tests including slump flow, L-box, and sieve segregation were conducted. Additionally, to evaluate mechanical strength, samples were tested for compressive strength at both 7 and 28 days. Findings from the experiments reveal higher concentrations of MK result in reduced workability and hardened properties. Through RSM-based designed experimentation covering both rheological and mechanical aspects, it is observed that the optimal cement replacement level lies between 40 and 55%. The findings of this study contribute to the advancement of sustainable and structurally robust concrete practices, offering insights into the optimal utilization of SCMs to meet both engineering requirements and environmental sustainability goals.

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“…The response surface plots indicate combined effects of two factors on response Figs. 3,4,5,6,7,8,9,10,11,12,13.…”

Section: Slump Flowmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Enhancing sustainability in self-compacting concrete by optimizing blended supplementary cementitious materials

Aziz,

Mehboob,

Tayyab

et al. 2024

Sci Rep

View full text Add to dashboard Cite

show abstract

“…Metakaolin (Al 2 Si 2 O 7 ) is made from kaolin clay. An amorphous kaolinite produced by treatment at 500 to 800 • C was used to convert kaolin to metakaolin [38,39]. The Al (VI) in kaolinite is converted into Al (IV) and Al (V) in this process to generate amorphous aluminium silicate.…”

Section: Geopolymer Aluminosilicate Materialsmentioning

confidence: 99%

The Suitability of Photocatalyst Precursor Materials in Geopolymer Coating Applications: A Review

et al. 2022

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Today, the building and construction sector demands environmentally friendly and sustainable protective coatings using inorganic coating materials for safe, non-hazardous, and great performance. Many researchers have been working on sustainable solutions to protect concrete and metal infrastructures against corrosion and surface deterioration with the intention of introducing green alternatives to conventional coatings. This article presents a review of developments of geopolymer pastes doped with different types of photocatalyst precursors including factors affecting geopolymer properties for enhancing coating with photocatalytic performance. Photodegradation using geopolymer photocatalyst has great potential for resolving harmless substances and removing pollutants when energized with ultraviolet (UV) light. Although geopolymer is a potentially new material with great properties, there has been less research focusing on the development of this coating. This study demonstrated that geopolymer binders are ideal precursor support materials for the synthesis of photocatalytic materials, with a significant potential for optimizing their distinctive properties.

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Catalytic upgrading of Hami coal pyrolysis volatiles over mesoporous kaolin prepared by calcination and NaOH leaching

Hou,

Lu,

Bai

et al. 2024

Fuel

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Study on the Activity of Metakaolin Produced by Traditional Rotary Kiln in China

Cited by 8 publications

References 18 publications

Enhancing sustainability in self-compacting concrete by optimizing blended supplementary cementitious materials

Enhancing sustainability in self-compacting concrete by optimizing blended supplementary cementitious materials

The Suitability of Photocatalyst Precursor Materials in Geopolymer Coating Applications: A Review

Catalytic upgrading of Hami coal pyrolysis volatiles over mesoporous kaolin prepared by calcination and NaOH leaching

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