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Improvement of the mechanical properties of concrete by …

Metakaolin, a supplementary cementitious material, plays a crucial role in enhancing the performance of concrete. It facilitates a pozzolanic reaction with calcium hydroxide, generating additional calcium silicate hydrate (C–S–H) gel, which strengthens the concrete and accelerates early-age compressive strength.

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(PDF) A Comprehensive Effects Review of Using Metakaolin in Concrete

Both metakaolin (MK) a nd commercial metakaolin (MKC) exhibit similar b ehavior when it co mes to concrete strength. While metakaoli ns have higher than average k-values, near 3.0 on the da y of ...

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Influence of Metakaolin in Concrete Mixture: A …

Presently the use of metakaolin is gaining lot of importance in partial replacement of cement. It is because metakaolin has increased various strengths of concrete and improved durability....

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The role of metakaolin in pore structure evolution of …

DOI: 10.1016/J.CEMCONCOMP.2021.103999 Corpus ID: 233567290; The role of metakaolin in pore structure evolution of Portland cement pastes revealed by an impedance approach @article{Cai2021TheRO, title={The role of metakaolin in pore structure evolution of Portland cement pastes revealed by an impedance approach}, author={Rongjin Cai and Zushi Tian and …

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Understanding the role of epoxy resin and polyurethane in …

Geopolymer is a novel type of aluminosilicate cementitious material, which is rapidly gaining more and more attention due to its high engineering performance [4] and low carbon footprint [5].During the geopolymer production, industrial solid wastes, such as metakaolin [6], fly ash [7] and red mud [8], are usually adopted as the precursors of alkali-activated reactions.

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The Use of Metakaolin and Geopolymer Cement to Improve Concrete …

Corrosion of concrete sewer pipes by sulfuric acid attack is a problem of global scope. ... geopolymer cement; metakaolin; resistance of concrete and sulfuric acid. DOI: 10.14359 ... The results emphasize the important role that the nature and composition of hydration products and the completeness of the hydration process play in improving ...

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Curing of Concrete Specimens Containing Metakaolin, …

The American Concrete Institute. Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and …

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Understanding the role of magnesium ions on setting of metakaolin …

While batching of concrete consumes about 1 billion tons of mixing water annually, more than half of the global population will suffer from a shortage of drinking water by 2025 [6]. ... Normally, alkalinity plays a critical role in the dissolution rate …

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Recent advances in understanding the role of

While the use of SCMs in concrete in relatively small amounts (5–20% replacement of clinker) is often driven by economics and improvements in the long-term mechanical properties and durability of concrete, the impetus to replace an increasing percentage of clinker with SCMs often comes from pressure on the industry to reduce CO 2 emissions from concrete production.

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Alkali Silica Reaction Metakaolin

It was demonstrated that metakaolin in the amount from 5% to 20% by mass of Portland cement reduce linear expansion of mortar bars with opal aggregate. Nevertheless, the safe expansion level in the specimens, classified as non-destructive to concrete, was recorded for the mortars prepared with 20% addition of metakaolin. Depletion of

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Metakaolin in Concrete: The Role of Alumina

The increase in chloride resistance of MK concrete is attributed to the significant increase in chloride-binding resulting from the use of MK which is high in alumina …

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Properties of Metakaolin Concrete

Metakaolin, produced by calcining kaolinite at high temperature, is a pozzolanic material, suitable to be used in concrete mixes. This paper reviews the research published on …

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Influence of Metakaolin in Concrete Mixture: A …

Concrete with the metakaolin powder presented a strength of 609 kgf/cm2 (59.7 MPa), which corresponds to M9 (concrete containing 15% metakaolin), consistent with 116% improvement with respect to ...

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The role of inorganic polymer technology in the development …

Some properties (in general not those related to concrete applications) are best achieved by the use of metakaolin [13] or synthetic aluminosilicate precursors [14] rather than fly ash, and so the exploitation of these properties will depend on the development of niche applications in which the relatively high cost of these precursors compared ...

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(PDF) Geopolymer concrete with metakaolin for …

Several studies have been conducted to comprehend the effect of metakaolin as an additive in geopolymer mortar and concrete prepared with various aluminosilicate sources as precursors such as...

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Highly Reactive Metakaolin Concrete – Properties …

Metakaolin in concrete tend to reduce the size of pores which consequently lead to obtain more strength, higher density, and more resistance to acid. Furthermore, metakaolin improves concrete resistance to alkali silicate reactions and sulfate …

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Optimising the Use of Waste Glass in Portland Cement Concrete: The Role …

Therefore, this study aims to explore the potential impact of metakaolin on ASR mitigation and the adverse effect of strength reduction in waste-glass-aggregate concrete. The role of metakaolin in reducing ASR occurrence in waste-glass-aggregate concrete and enhancing the glass-paste interface were examined indirectly by the South African ...

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The role of zinc in metakaolin-based geopolymers

T1 - The role of zinc in metakaolin-based geopolymers. AU - Wang, Lei. AU - Geddes, Daniel A. AU - Walkley, Brant. AU - Provis, John L. AU - Mechtcherine, Viktor. AU - Tsang, Daniel C.W. ... JO - Cement and Concrete Research. JF - Cement and Concrete Research. M1 - 106194. ER -

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Influence of metakaolin on the properties of mortar and concrete…

Chloride penetrability of the concrete with metakaolin (MK) at w/b ratios of 0.3 and 0.5 were reported by Poon et al. (2006) (Table 13). Both the MK concretes showed lower total ion penetration than the control. At w/b of 0.3, concrete with a 10% MK showed the best performance, while at w/b of 0.5, 20% replacement was the best.

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Effects of Metakaolin and Silica Fume on Properties of Concrete

The American Concrete Institute. Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations …

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Optimising the Use of Waste Glass in Portland Cement Concrete: The Role …

Furthermore, the use of metakaolin in fly ash concrete improves the early age performance of the concrete (<90 days), counteracting the delay in strength and durability gain typically associated ...

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(PDF) Metakaolin's Role in Enhancing Concrete Durability …

METAKAOLIN IN CONCRETE – BENEFICIAL IMPACT ON PERFORMANCE PARAMETERS Saíd Jalali (1), Alexandre Peyroteo (1) and Miguel Ferreira (1) (1) Department of Civil Engineering, University of Minho, Portugal y ar in im el Pr Abstract Both extensive literature and practical experience have shown that a partial replacement of Portland cement with pozzolanic additions …

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Role of Metakaolin on Lowering pH of the Alkali Activated …

Role of Metakaolin on Lowering pH of the Alkali Activated Cement Concrete in Barrier Application. In: Scrivener, K., Favier, A. (eds) Calcined Clays for Sustainable Concrete. RILEM Bookseries, vol 10.

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The role of zinc in metakaolin-based geopolymers

Previously, different reasonings have been given to explain behavior of Zn 2+ in silica-rich geopolymer systems. Wang et al. 10 analyzed the role of ZnO on metakaolin based geopolymer material ...

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Metakaolin in ultra-high-performance concrete: A critical …

The review offers insights into the potential of metakaolin as a sustainable substitute for conventional concrete admixtures by critically examining the ideal level of metakaolin to be …

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Alkali Silica Reaction In The Presence Of Metakaolin

[9] Ramlochan T., Thomas M. and Gruber K. A. 2000 The effect of metakaolin on alkali-silica reaction in concrete Cement and Concrete Research 30 339-344. Crossref; Google Scholar [10] Zheng K. 2016 Pozzolanic reaction of glass powder and its role in controlling alkali-silica reaction Cement and Concrete Composites 67 30-38. Crossref; Google Scholar

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Engineering performance of metakaolin based concrete

This experimental study aims to investigate the engineering properties of metakaolin (MK) based concrete exposed to chloride attack. The investigation was conducted for different w/b ratios of 0.54–0.61. The MK, utilised as cementitious material, was varied from 0 to 20% with an increment of 5% and ages of concrete from 7 to 56 days were ...

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Understanding the role of magnesium ions on setting of metakaolin …

While batching of concrete consumes about 1 billion tons of mixing water annually, more than half of the global population will suffer from a shortage of drinking water by 2025 [6]. ... Metakaolin was selected as the precursor due to its high purity that facilitates a mechanistic investigation. The hardening process was monitored using both ...

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The role of metakaolin in pore structure evolution of Portland cement

Metakaolin has been shown to play a significant role in the pore structure evolution of cementitious materials due to its high pozzolanic reactivity and small fineness. In this work, the early-age evolution of pore structure of moderate heat Portland cement (MHPC) pastes incorporating metakaolin is studied using an innovative impedance approach. Based on the …

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The role of metakaolin in pore structure evolution of …

Metakaolin has been shown to play a significant role in the pore structure evolution of cementitious materials due to its high pozzolanic reactivity and small fineness.