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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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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 chemistry and fineness of metakaolin on the …

Sensible thermal energy storage using concrete as a storage medium is a promising technology that helps minimize energy in power plant. The purpose of this study is to evaluate the potential benefits of metakaolin (MK) as a partial substitute for fly ash-based geopolymer for heat resistance. As a partial substitute (5 and 20 wt.%) for fly ash (FA), nine …

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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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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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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.

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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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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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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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Impact of Metakaolin on the Properties of Concrete: A …

A critical role in C ASH (gehlenite hydrate) and hydrated calcium concrete performance in such severe environment is aluminates, Cand C[11,12,13]. The played by the porous system and the surface of the composition and structure of CSH are variable, as ... durability of concrete containing metakaolin and other inadequate mixing of the ...

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ROLE OF METAKAOLIN IN SUPPRESSING ASR IN …

THE 9TH INTERNATIONAL CONFERENCE ON ALKALI-AGGREGATEREACTION IN CONCRETE 1992 ROLE OF METAKAOLIN IN SUPPRESSING ASR IN CONCRETE CONTAINING REACTIVE AGGREGATE AND EXPOSED TO SATURATED NaCl SOLUTION ... Portland cement (OPC) in a concrete mixture was replaced by metakaolin. Only 10% …

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Metakaolin in Concrete: Its Properties, Advantages

Kaolin Clay. Metakaolin consist of silica and alumina in an active form and as other mineral admixtures, it reacts with the calcium hydroxide at room temperature and form calcium silicate hydrate (C-S-H)-gel which increases the density of concrete and reduces porosity.Thus, it decreases permeability and increase durability of the concrete.

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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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Combined influence of modified recycled concrete …

High-strength concrete (HSC) uses metakaolin, made from natural kaolin clay and heated to high temperatures. It is mainly used as a pozzolanic component in HSC. For this experiment, it was …

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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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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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The role of metakaolin in the protection of concrete …

The role of metakaolin in the protection of concrete against the deleterious action of chlorides

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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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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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The role of zinc in metakaolin-based geopolymers

1 1 The Role of Zinc in Metakaolin-Based Geopolymers 2 Lei Wang1,2,3, Daniel A. Geddes1, Brant Walkley1,4, John L. Provis1, Viktor Mechtcherine3, 3 Daniel C.W. Tsang2, * 4 5 1 Department of Materials Science and Engineering, The University of Sheffield, Sir Robert Hadfield 6 Building, Mappin St, Sheffield S1 3JD, United Kingdom. 7 2 Department of Civil and …

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Impact of Metakaolin on the Properties of Concrete: A

Many research works demonstrate that application of metakaolin improves properties of concrete as freeze-thaw. R. Kalaignan, Research Scholar, Pondicherry Engineering College, …

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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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Understanding the Role of Metakaolin towards Mitigating …

The samples without metakaolin have a higher autogenous shrinkage among other samples with different metakaolin contents, indicating that the inclusion of metakaolin in alkali-activated slag contributes to mitigating autogenous shrinkage of alkali-activated slag, which is consistent with the results reported by Li et al. [6,17]. In addition ...

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(PDF) Properties of Metakaolin Concrete

The substitution of 10 and 15% by weight of cement by metakaolin in the concrete with 12% of cement which provided, respectively, an increase of 12 and 6% in compressive strength compared to ...

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

The curing process also plays a crucial role in developing compressive strength in ultra-high-performance concrete with metakaolin. Adequate curing, particularly during the first few days after casting, is necessary to properly hydrate the cementitious materials and form a …

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A study on the role of metakaolin and alccofine as …

In recent years, the utilization of supplementary materials has played an important role in development of high strength concrete, improving the overall properties of concrete and rendering sustainability to concrete construction. Though different supplementary materials such as fly ash, silica fume, metakaolin and ground granulated blast furnace slag have been utilized …

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Highly Reactive Metakaolin Concrete – …

After 112 days of curing in 50% relative humidity, the drying shrinkage of controlled concrete was higher than metakaolin concrete by approximately 20%. Figure-4 show the drying shrinkage of both controlled and metakaolin concrete …

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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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The role of zinc in metakaolin-based geopolymers

DOI: 10.1016/j.cemconres.2020.106194 Corpus ID: 224903099; The role of zinc in metakaolin-based geopolymers @article{Wang2020TheRO, title={The role of zinc in metakaolin-based geopolymers}, author={Lei Wang and Lei Wang and Lei Wang and Daniel A. Geddes and Brant Walkley and John L. Provis and Viktor Mechtcherine and Daniel C W Tsang}, journal={Cement …

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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