... in availability of PFA predicted in the near future, alternative SCMs are required. In nuclear encapsulation, a key parameter for a new SCM is that it does not change the leaching behaviour of the grout. We present promising initial leaching data from two SCMs: metakaolin and waste paper fly ash. These were...

... evaluated. The results showed that zeolite ZK-14, hydrosodalite, sodium carbonate and a geopolymer composed of poly(sialate) units were formed in all cured samples. The relative amounts of zeolite and metakaolin evolved antagonistically, whereas that of illite slightly decreased with increasing cellulose...

...Kaiqiang Geng; Junrui Chai; Yuan Qin; Xiaoli Li; Heng Zhou; Xianwei Zhang Abstract To fully understand the solidification effect of metakaolin (MK) on Pisha sandstone cement soil, unconfined compressive strength (UCS), ultradepth 3D microscopy (U3DM), nuclear magnetic resonance (NMR), X-ray...

..., differing in terms of molecular structure, were also included in this study. The results revealed that SSPs improved the slump of a metakaolin-based geopolymer (MK-geopolymer) mortar while the PCE investigated showed no improvement. The impact of superplasticizers on early hardening (up to 72 h...

... of the present study was to synthesize NaY from dealuminated metakaolin, using a method that minimizes the detrimental effects of sulfur, and to investigate the effect of its activity on CO 2 methanation. Kaolin from Bangka Belitung, Indonesia, was calcined at 720°C for 4 h to form metakaolin (M...

... kaolin KBE-1 (grain size ≤20 μm) from Amberger Kaolinwerke Eduard Kick GmbH & Co. KG (Hirschau, Bavaria, Germany) was used to produce metakaolin by calcination. The calcination of KBE-1 was carried out at 480, 555, 615, 700, and 900°C in a L9/12/B180 furnace from Nabertherm (Lilienthal, Germany...

... tons of metakaolin are manufactured every year by calcination of kaolin for various applications, e.g. as concrete additive, supplementary cementitious material, and geopolymer precursor but also as fillers and coating for specialty paper, or as a paint extender. The behavior of clay minerals...

...Danyal Karbalaei Saleh; Hadi Abdollahi; Mohammad Noaparast; Alireza Fallah Nosratabad Abstract This study examines the leaching of aluminium from calcined kaolin (metakaolin) with citric, oxalic and lactic acid and binary combinations of these organic acids. The investigated parameters were...

...Magdalena Król; Piotr Rożek ABSTRACT The aim of this research was to determine the temperature of kaolin calcination in order to obtain an intermediate product (metakaolin) for the synthesis of geopolymers with potential application as self-supporting zeolitic membranes. The products obtained were...

...Paula E.A. Lima; Rômulo S. Angélica; Roberto F. Neves Abstract The kinetics of dissolution of Amazonian metakaolin in hydrochloric acid (HCl) was studied using the ‘Shrinking Core Model’ for spherical and ‘flat plate’ particles of constant size. The Amazonian kaolin was calcined at 700°C for 2 h...

... a metakaolin-based geopolymer (SiO 2 /Al 2 O 3 =3.2) using a hydrothermal method. The products obtained by hydrothermal treatment were identified using X-ray diffraction (XRD), scanning electron microscopy (SEM), and specific surface areas. The XRD patterns and SEM micrographs indicated that the structure...

... thermal decomposition by controlled rate thermal analysis . Journal of the American Ceramic Society , 78 , 2940 – 2944 . Medri V. Fabbri S. Dedecek J. Sobalik Z. Tvaruzkova Z. Vaccari A. ( 2010 ) Role of the morphology and the dehydroxylation of metakaolins...

... to a milling process to reduce the particle size to the order of 11 μm, and was heat treated to transform it to metakaolin. Optimization of the synthesis variables (Na 2 O/SiO 2 and H 2 O/Al 2 O 3 ratios, time, and temperature) was accomplished by applying an experimental design based on the ‘Response Surface...

...G. L. Pesce; C. R. Bowen; J. Rocha; M. Sardo; G. C. Allen; P. J. Walker; G. Denuault; M. Serrapede; R. J. Ball Abstract This paper describes a study of the hydraulic reactions between metakaolin (MK) and air lime using electrochemical impedance spectroscopy (EIS) and nuclear magnetic resonance...

... for metakaolin Relict frit *** SiO 2 74.1 74.0 81.9 80.5 Al 2 O 3 12.8 1.3 FeO 0.3 0.4 0.3 MgO 2.4 2.4 3.3 5.8 CaO 10.4 3.2 4.4 8.6 Na 2 O 8.3 3.1 4.3 0.9 K 2 O 4.8 3.6 5.0 0.6 P 2 O 5 0.5 0.7 1.4 Total 100.0 99.9 100.0 99.4 * Ramsay...

...S. Andrejkovičová; E. Ferraz; A. L. Velosa; A. S. Silva; F. Rocha Abstract Lime-based mortars with admixtures of metakaolin (10, 20 and 30 wt.%) and fine sepiolite (5 wt.%) were prepared with the aim of facilitating their use as repair mortars in low-humidity conditions. The mechanical properties...

... for the synthesis of zeolite Na-A and Na-X from metakaolin in order to economize on both energy (i.e. synthesis temperatures) and reaction time and to enlarge the field of pure and isolated synthesized phases. Metakaolin was mixed with calculated amounts of NaOH solution and sodium silicate and five sets...

...Steven M. Kuznicki; Christopher C. H. Lin; Lan Wu; Haiyan Yin; Mohsen Danaie; David Mitlin Abstract Mineral chabazite has shown the unusual ability to surface template nanometal particles, especially Ag. A chabazite analog was synthesized from delaminated metakaolin. The chabazite formed retained...