Results 131 to 140 of about 18,984 (163)

Metakaolin—lime hydration products

Thermochimica Acta, 1984
Abstract Four mixtures were prepared of weight ratios 80:20, 70:30, 60:40 and 50:50 of china kaolin/pure Ca(OH) 2 . Each mix was activated for 2 h at 800°C and then paste hydrated at room temperature and 100% RH for up to 28 days. The hydration products were studied by XRD as well as DTA and TG techniques.
M.A. Serry, A.S. Taha, S.A.S. El-Hemaly, H. El-Didamony   +3 more
openaire   +1 more source

Pozzolanic activation of metakaolin

Advances in Cement Research, 1992
Metakaolin may be calcined without grinding and suitably activated by Ca(OH)2, Na2SO4, CaSO4 (beta anhydrite) and/or NaOH. The best strengths, 50 MPa from mortar cubes at 18 months, were obtained using Ca(OH)2 and CaSO4 activators. The handling and set properties are similar to those of Portland cement; aluminous C-S-H gel is the best binder.
P. S. De Silva, F. P. Glasser
openaire   +1 more source

Properties of Metakaolin blended cements

Advanced Cement Based Materials, 1994
Abstract Metakaolin is a supplementary cementitious material with pozzolanic properties. Its activation by triacalcium silicate (C3S), triacalcium aluminate (C3A), and ordinary Portland cement is reported. The early hydration period of pastes containing metakaolin was investigated using isothermal calorimetry and conductivity.
Jean Ambroise, Sandrine Maximilien, Jean Pera   +2 more
openaire   +1 more source

Sulphate Resistance of Metakaolin Mortar

Cement and Concrete Research, 1998
Abstract The partial substitution of cement (both high C3A and intermediate C3A) with metakaolin (MK) is investigated in terms of resistance of MK mortar to sodium sulphate (Na2SO4) solution. Results on strength, porosity, pore size distribution, and calcium hydroxide (CH) contents are also reported.
J.M Khatib, S Wild
openaire   +1 more source

Metakaolin as supplementary cementitious material

Journal of Thermal Analysis and Calorimetry, 2005
In this paper the optimization of the kaolin calcination is studied, aiming at using the produced metakaolin as supplementary cementitious material. Representative samples of poor Greek kaolin (Milos island) and a high purity commercial kaolin were tested. Samples were heated at different temperatures during different times.
E. Badogiannis, G. Kakali, S. Tsivilis
openaire   +1 more source

Lime-metakaolin hydration products: a microscopy analysis: Produkti hidracije apno-metakaolin: mikroskopska analiza:

2012
Metakaolin (MK) je danes dobro poznan pocolanski material in se uporablja v gradivih na podlagi cementa, npr. malta in beton. Reakcija MK s kalcijevim hidroksidom ustvari cementne proizvode: kalcijev silikatni hidrat (CSH), stratlingit (C2ASH8) in tetra kalcij aluminijev hidrat (C4AH13) kot glavne faze, ki nastanejo pri temperaturi okolice ...
Gameiro, André Leal, Santos-Silva, Antonio, Veiga, Maria do Rosário, Velosa, Ana Luísa   +3 more
openaire   +2 more sources

Impact strength of metakaolin ferrocement

Materials and Structures, 2014
In this study, the impact performance of ferrocement with metakaolin was investigated to explore potential uses of both ferrocement and metakaolin in construction industry. A series of ferrocement specimens were cast with varying number of mesh layers and with varying metakaolin percentages. The specimens were normal water-cured for 180 days.
Amarnath Yerramala, C. Rama Chandurdu, V. Bhaskar Desai   +2 more
openaire   +1 more source

Flexural strength of metakaolin ferrocement

Composites Part B: Engineering, 2013
Abstract Flexural strength of metakaolin ferrocements was evaluated through laboratory investigation. Reference mortar with OPC of 43 grade and metakaolin mortars with 5–25% metakaolin replacement in the increments of 5% with cement were made. Constant water to cementitious ratio of 0.5 was maintained for all the mortars.
Amarnath Yerramala, C. Ramachandurdu, V. Bhaskar Desai   +2 more
openaire   +1 more source